Engine Control System [diagnostic Codes & Circuit Tests] Toyota Prius V I

DTC SUMMARY

DESCRIPTION

The description can be found in the EVAP (Evaporative Emission) System. Refer to DESCRIPTION .

MONITOR DESCRIPTION

The 2 monitors, key-off and purge flow, are used to detect malfunctions relating to DTC P0441. The Key-Off monitor is initiated by the ECM internal timer, known as the soak timer, 5 hours*1 after the power switch is turned off. The purge flow monitor runs while the engine is running.

Scheme 42

Scheme 43

Scheme 44

Scheme 45

1. KEY-OFF MONITOR 5 hours*1 after the power switch is turned off, the electric leak detection pump creates negative pressure (vacuum) in the EVAP (Evaporative Emission) system. The ECM monitors for leaks and actuator malfunctions based on the EVAP pressure. HINT: *1: If the engine coolant temperature is not below 35°C (95°F) 5 hours after the power switch is turned off, the monitor check starts 2 hours later. If it is still not below 35°C (95°F) 7 hours after the power switch is turned off, the monitor check starts 2.5 hours later. Sequence Operation Description Duration - ECM activation Activated by soak timer, 5, 7 or 9.5 hours after power switch turned off. - A Atmospheric pressure measurement Vent valve is turned off (vent) and EVAP system pressure is measured by ECM in order to register atmospheric pressure. If pressure in EVAP system is not between 70 kPa (abs) and 111 kPa (abs) [525 mmHg (abs) and 833 mmHg (abs)], ECM cancels EVAP system monitor. 60 seconds B First reference pressure measurement In order to determine reference pressure, leak detection pump creates negative pressure (vacuum) through reference orifice and then ECM checks if leak detection pump and vent valve operate normally. 360 seconds C EVAP system pressure measurement Vent valve is turned on (closed) to shut EVAP system. Negative pressure (vacuum) is created in EVAP system, and EVAP system pressure is then measured. Write down measured value as it will be used in leak check If EVAP pressure does not stabilize within 15 minutes, ECM cancels EVAP system monitor. 15 minutes*2 D Purge VSV monitor Purge VSV is opened and then EVAP system pressure is measured by ECM. Large increase indicates normal. 10 seconds E Second reference pressure measurement After second reference pressure measurement, leak check is performed by comparing first and second reference pressure measurements. If stabilized system pressure is higher than second reference pressure, ECM determines that EVAP system is leaking. 60 seconds - Final check Atmospheric pressure is measured and then monitoring result is recorded by ECM. - *2: If only a small amount of fuel is in the fuel tank, it takes longer for the EVAP pressure to stabilize. TEXT IN ILLUSTRATION *1 Purge VSV: Off (Closed) *2 Purge VSV: On (Open) *3 Vent Valve: Off (Vent) *4 Vent Valve: On (Closed) *5 Leak Detection Pump: Off *6 Leak Detection Pump: On *7 Reference Orifice (0.02 inch) *8 Canister Pressure Sensor *9 Canister *10 Fuel Tank *11 Canister Pump Module *12 Canister Filter *a Operation A: Atmospheric Pressure Measurement *b Operation B, E: Reference Pressure Measurement *c Operation C: EVAP System Pressure Measurement *d Operation D: Purge VSV Monitor *e Atmospheric Pressure *f Negative Pressure Purge VSV stuck open In operation C, the leak detection pump creates negative pressure (vacuum) in the EVAP (Evaporative Emission) system. The EVAP system pressure is then measured by the ECM using the canister pressure sensor. If the stabilized system pressure is higher than [second reference pressure x 0.2], the ECM interprets this as the purge VSV being stuck open. The ECM illuminates the MIL and stores the DTC (2 trip detection logic). Purge VSV stuck closed In operation D, the canister pressure sensor measures the EVAP (Evaporative Emission) system pressure. The pressure measurement for the purge VSV monitor begins when the purge VSV is turned on (open) after the EVAP leak check. When the measured pressure indicates an increase of 0.3 kPa (gauge) [2.25 mmHg (gauge)] or higher, the purge VSV is functioning normally. If the pressure does not increase, the ECM interprets this as the purge VSV being stuck closed. The ECM illuminates the MIL and stores the DTC (2 trip detection logic).
2. PURGE FLOW MONITOR The purge flow monitor consists of 2 step monitors. The 1st monitor is conducted every time and the 2nd monitor is activated if necessary.

1. The 1st monitor While the engine is running and the purge VSV is on (open), the ECM monitors the purge flow by measuring the EVAP pressure change. If negative pressure is not created, the ECM begins the 2nd monitor.
2. The 2nd monitor The vent valve is turned on (closed) and the EVAP pressure is then measured. If the variation in the pressure is less than 0.5 kPa (gauge) [3.75 mmHg (gauge)], the ECM interprets this as the purge VSV being stuck closed, and illuminates the MIL and stores DTC P0441 (2 trip detection logic).

Atmospheric pressure check

In order to ensure reliable malfunction detection, the variation between the atmospheric pressures, before and after conduction of the purge flow monitor, is measured by the ECM.

MONITOR STRATEGY

TYPICAL ENABLING CONDITIONS

ALL

KEY-OFF MONITOR

PURGE FLOW MONITOR

TYPICAL MALFUNCTION THRESHOLDS

PURGE VSV STUCK OPEN

PURGE VSV STUCK CLOSED

PURGE FLOW

MONITOR RESULT

Refer to EVAP System. Refer to MONITOR RESULT .

CONFIRMATION DRIVING PATTERN

1. Connect the Techstream to the DLC3.
2. Turn the power switch on (IG) and turn the Techstream on.
3. Clear the DTCs (even if no DTCs are stored, perform the clear DTC procedure). Refer to «DTC CHECK / CLEAR»(/toyota/prius-v/i-2011-2014/remont/testing-diagnostics/#engine-control-system-diagnostics-introduction__dtc-check-clear) .
4. Turn the power switch off and wait for 30 seconds.
5. Turn the power switch on (IG) and turn the Techstream on.
6. Put the engine in inspection mode (maintenance mode). Refer to «INSPECTION MODE PROCEDURE»(/toyota/prius-v/i-2011-2014/remont/hoistjack/#introduction) .
7. Start the engine and wait 15 minutes or more.
8. Enter the following menus: Powertrain / Engine and ECT / Trouble Codes.
9. Read the pending DTCs. HINT: If a pending DTC is output, the system is malfunctioning. If a pending DTC is not output, perform the following procedure.
10. Enter the following menus: Powertrain / Engine and ECT / Utility / All readiness.
11. Input the DTC: P0441.
12. Check the DTC judgment result. Techstream Display Description NORMAL DTC judgment completed System normal ABNORMAL DTC judgment completed System abnormal INCOMPLETE DTC judgment not completed Perform driving pattern after confirming DTC enabling conditions N/A Unable to perform DTC judgment Number of DTCs which do not fulfill DTC preconditions has reached ECU's memory limit HINT: If the judgment result shows NORMAL, the system is normal. If the judgment result shows ABNORMAL, the system has a malfunction. If the judgment result shows INCOMPLETE or N/A, perform the following procedure. NOTE: The Evaporative System Check (Automatic Mode) consists of 6 steps performed automatically by the Techstream. It takes a maximum of approximately 24 minutes. Do not perform the Evaporative System Check when the fuel tank is more than 90% full because the cut-off valve may be closed, making the fuel tank leak check unavailable. Do not run the engine during this operation. When the temperature of the fuel is 35°C (95°F) or higher, a large amount of vapor forms and any check results become inaccurate. When performing the Evaporative System Check, keep the fuel temperature below 35°C (95°F).
13. Clear the DTCs (even if no DTCs are stored, perform the clear DTC operation). Refer to «DTC CHECK / CLEAR»(/toyota/prius-v/i-2011-2014/remont/testing-diagnostics/#engine-control-system-diagnostics-introduction__dtc-check-clear) .
14. Turn the power switch off and wait for 30 seconds.
15. Turn the power switch on (IG).
16. Turn the Techstream on.
17. Enter the following menus: Powertrain / Engine and ECT / Utility / Evaporative System Check / Automatic Mode.
18. After the Evaporative System is completed, check for All Readiness by entering the following menus: Powertrain / Engine and ECT / Utility / All Readiness.
19. Input the DTC: P0441.
20. Check the DTC judgment result. Techstream Display Description NORMAL DTC judgment completed System normal ABNORMAL DTC judgment completed System abnormal INCOMPLETE DTC judgment not completed Perform driving pattern after confirming DTC enabling conditions N/A Unable to perform DTC judgment Number of DTCs which do not fulfill DTC preconditions has reached ECU's memory limit HINT: If the judgment result shows NORMAL, the system is normal. If the judgment result shows ABNORMAL, the system has a malfunction.
21. If the judgment result is INCOMPLETE or N/A and no pending DTC is output, perform a universal trip and check for permanent DTCs. Refer to «DTC CHECK / CLEAR»(/toyota/prius-v/i-2011-2014/remont/testing-diagnostics/#engine-control-system-diagnostics-introduction__dtc-check-clear) . HINT: If a permanent DTC is output, the system is malfunctioning. If no permanent DTC is output, the system is normal.

INSPECTION PROCEDURE

HINT

Read freeze frame data using the Techstream. The ECM records vehicle and driving condition information as freeze frame data the moment a DTC is stored. When troubleshooting, freeze frame data can help determine if the vehicle was moving or stationary, if the engine was warmed up or not, if the air fuel ratio was lean or rich, and other data from the time the malfunction occurred.

PROCEDURE

1. CHECK ANY OTHER DTCS OUTPUT (IN ADDITION TO DTC P0441) Connect the Techstream to the DLC3. Turn the power switch on (IG). Turn the Techstream on. Enter the following menus: Powertrain / Engine and ECT / Trouble Codes. Read the DTC. RESULT Result Proceed to DTC P0441 is output A DTC P0441 and other DTCs are output B B --> See step 5 A: Go to next step
2. PERFORM ACTIVE TEST USING TECHSTREAM (CONTROL THE EGR STEP POSITION) Connect the Techstream to the DLC3. Turn the power switch on (IG). Turn the Techstream on. Put the engine in inspection mode (maintenance mode). Refer to «INSPECTION MODE PROCEDURE»(/toyota/prius-v/i-2011-2014/remont/hoistjack/#introduction) . Start the engine and warm it up until the engine coolant temperature reaches 75°C (167°F) or higher. HINT: The A/C switch and all accessory switches should be off. Enter the following menus: Powertrain / Engine and ECT / Active Test / Control the EGR Step Position / Data List / Primary / MAP. Check the engine idling condition and MAP values in the Data List while performing the Active Test. HINT: Do not leave the EGR valve open for 10 seconds or more during the Active Test. Be sure to return the EGR valve to step 0 when the Active Test is completed. Do not open the EGR valve 30 steps or more during the Active Test. OK MAP and idling condition change in response to EGR step position. Standard - EGR Step Position (Active Test) 0 Steps 0 to 30 Steps Idling condition Steady idling Idling changes from steady to rough idling or engine stalls MAP (Data List) MAP value is 20 to 40 kPa (150 to 300 mmHg) (EGR valve is fully closed) MAP value is at least +10 kPa (75 mmHg) higher than when EGR valve is fully closed HINT: During Active Test, if the idling condition does not change in response to EGR step position, then there is probably a malfunction in the EGR valve. Result Result Proceed to Outside of standard range A Within standard range B B --> See step 4 A: Go to next step
3. INSPECT EGR VALVE ASSEMBLY Remove the EGR valve assembly. Refer to «REMOVAL»(/toyota/prius-v/i-2011-2014/remont/auxiliary-emission-control-systems/#emission-control-system-service-information) . Check if the EGR valve is stuck open. OK EGR valve is tightly closed. NG --> See step 6 OK --> See step 4
4. GO TO EVAP SYSTEM. Refer to «EVAP System»(/toyota/prius-v/i-2011-2014/remont/testing-diagnostics/#engine-control-system-diagnostic-codes-circuit-tests)
5. GO TO DTC CHART. Refer to «DIAGNOSTIC TROUBLE CODE CHART»(/toyota/prius-v/i-2011-2014/remont/testing-diagnostics/#engine-control-system-diagnostics-introduction__diagnostic-trouble-code-chart)
6. REPLACE EGR VALVE ASSEMBLY. Refer to «REMOVAL»(/toyota/prius-v/i-2011-2014/remont/auxiliary-emission-control-systems/#emission-control-system-service-information)

HINT

The canister pressure sensor is built into the canister pump module.

The description can be found in the EVAP (Evaporative Emission) System. Refer to DESCRIPTION .

Scheme 46

1. DTC P0451: Canister pressure sensor abnormal voltage fluctuation If the canister pressure sensor voltage output fluctuates rapidly for 10 seconds, the ECM stops the EVAP system monitor. The ECM than interprets this as the canister pressure sensor voltage fluctuating, and stops the EVAP system monitor. The ECM then illuminates the MIL and stores the DTC. (Malfunction is detected by 2 trip detection logic.)
2. DTC P0452: Canister pressure sensor voltage low If the canister pressure sensor voltage output (pressure) is below 0.45 V: 42.11 kPa (abs) [315.83 mmHg (abs)], the ECM interprets this as an open or short circuit in the canister pressure sensor or its circuit, and stops the EVAP system monitor. The ECM then illuminates the MIL and stores the DTC (1 trip detection logic).
3. DTC P0453: Canister pressure sensor voltage high If the canister pressure sensor voltage output (pressure) is 4.9 V or more: 123.761 kPa (abs) [928.208 mmHg (abs)], the ECM interprets this as an open or short circuit in the canister pressure sensor or its circuit, and stops the EVAP system monitor. The ECM then illuminates the MIL and stores the DTC (1 trip detection logic).

P0451

P0452 AND P0453

P0451: CANISTER PRESSURE SENSOR NOISE

P0452: CANISTER PRESSURE SENSOR LOW VOLTAGE

P0453: CANISTER PRESSURE SENSOR HIGH VOLTAGE

Note. The Evaporative System Check (Automatic Mode) consists of 6 steps performed automatically by the Techstream. It takes a maximum of approximately 24 minutes. Do not perform the Evaporative System Check when the fuel tank is more than 90% full because the cut-off valve may be closed, making the fuel tank leak check unavailable. Do not run the engine during this operation. When the temperature of the fuel is 35°C (95°F) or higher, a large amount of vapor forms and any check results become inaccurate. When performing the Evaporative System Check, keep the fuel temperature below 35°C (95°F).

1. Connect the Techstream to the DLC3.
2. Turn the power switch on (IG) and turn the Techstream on.
3. Enter the following menus: Powertrain / Engine and ECT / Data List / Primary / Intake Air.
4. Check that the intake air temperature is between 4.4 and 50°C (40 and 122°F).
5. Clear the DTCs (even if no DTCs are stored, perform the clear DTC procedure). Refer to «DTC CHECK / CLEAR»(/toyota/prius-v/i-2011-2014/remont/testing-diagnostics/#engine-control-system-diagnostics-introduction__dtc-check-clear) .
6. Turn the power switch off and wait for 30 seconds.
7. Turn the power switch on (IG) and turn the Techstream on.
8. Enter the following menus: Powertrain / Engine and ECT / Utility / Evaporative System Check / Automatic Mode.
9. After the "Evaporative System Check" is completed, check for All Readiness by entering the following menus: Powertrain / Engine and ECT / Utility / All Readiness.
10. Input the DTC: P0451, P0452 or P0453.
11. Check the DTC judgment result. Techstream Display Description NORMAL DTC judgment completed System normal ABNORMAL DTC judgment completed System abnormal INCOMPLETE DTC judgment not completed Perform driving pattern after confirming DTC enabling conditions N/A Unable to perform DTC judgment Number of DTCs which do not fulfill DTC preconditions has reached ECU's memory limit HINT: If the judgment result shows NORMAL, the system is normal. If the judgment result shows ABNORMAL, the system has a malfunction.
12. If the judgment result is INCOMPLETE or N/A and no pending DTC is output, perform a universal trip and check for permanent DTCs. Refer to «DTC CHECK / CLEAR»(/toyota/prius-v/i-2011-2014/remont/testing-diagnostics/#engine-control-system-diagnostics-introduction__dtc-check-clear) . HINT: If a permanent DTC is output, the system is malfunctioning. If no permanent DTC is output, the system is normal.

Scheme 47

Note. When a vehicle is brought into the workshop, leave it as it is. Do not change the vehicle condition. For example, do not tighten the fuel cap. Do not disassemble the canister pump module. The Techstream is required to conduct the following diagnostic troubleshooting procedure. Inspect the fuses for circuits related to this system before performing the following inspection procedure.

Scheme 48

1. CONFIRM DTC AND EVAP PRESSURE Connect the Techstream to the DLC3. Turn the power switch on (IG) (do not start the engine). Turn the Techstream on. Enter the following menus: Powertrain / Engine and ECT / Trouble Codes. Read the DTCs. Enter the following menus: Powertrain / Engine and ECT / Data List / Gas Evaporative / Vapor Pressure Pump. Read the EVAP (Evaporative Emission) pressure displayed on the Techstream. RESULT Display (DTC Output) Test Result Suspected Trouble Area Proceed to P0451 - Canister pressure sensor C P0452 Less than 42.11 kPa (abs) [315.83 mmHg (abs)] Wire harness/connector (ECM - Canister pressure sensor) Canister pressure sensor Short in ECM circuit A P0453 Higher than 123.761 kPa (abs) [928.208 mmHg (abs)] Wire harness/connector (ECM - Canister pressure sensor) Canister pressure sensor Open in ECM circuit B B --> See step 5 C --> See step 4 A: Go to next step
2. CHECK HARNESS AND CONNECTOR (CANISTER PUMP MODULE - ECM) Turn the power switch off. Disconnect the ECM connector. Measure the resistance according to the value(s) in the table below. RESULT Tester Connection Condition Specified Condition Suspected Trouble Area Proceed to D28-114 (PPMP) - Body ground Always Below 10 ohms Wire harness/connector (ECM - Canister pressure sensor) Short in canister pressure sensor circuit A 10 kohms or higher Wire harness/connector (ECM - Canister pressure sensor) Short in ECM circuit B B --> See step 8 A: Go to next step
3. CHECK HARNESS AND CONNECTOR (CANISTER PUMP MODULE - ECM) Disconnect the canister pump module connector. Disconnect the ECM connector. Measure the resistance according to the value(s) in the table below. RESULT Tester Connection Condition Specified Condition Suspected Trouble Area Proceed to D28-114 (PPMP) - Body ground Always 10 kohms or higher Short in canister pressure sensor circuit A Below 10 ohms Short in wire harness/connector (ECM - Canister pressure sensor) B A --> See step 6 B --> See step 7
4. GO TO EVAP SYSTEM. Refer to «EVAP System»(/toyota/prius-v/i-2011-2014/remont/testing-diagnostics/#engine-control-system-diagnostic-codes-circuit-tests)
5. CHECK HARNESS AND CONNECTOR (CANISTER PUMP MODULE - ECM) Disconnect the canister pump module connector. Measure the resistance according to the value(s) in the table below. Standard Resistance Tester Connection Condition Specified Condition o1-8 (SGND) - Body ground Always 100 ohms or less Turn the power switch on (IG). Measure the voltage according to the value(s) in the table below. Standard Voltage Tester Connection Condition Specified Condition o1-6 (VCC) - Body ground Power switch on (IG) 4.5 to 5.5 V o1-7 (VOUT) - Body ground Power switch on (IG) 4.5 to 5.5 V RESULT Test Result Suspected Trouble Area Proceed to Voltage and resistance within standard ranges Open in canister pressure sensor circuit A Voltage and resistance outside standard ranges Open in wire harness/connector (ECM - Canister pressure sensor) B B --> See step 7 A: Go to next step
6. REPLACE CANISTER PUMP MODULE Replace the canister pump module. Refer to «REMOVAL - Step 2»(/toyota/prius-v/i-2011-2014/remont/auxiliary-emission-control-systems/#emission-control-system-service-information) . NOTE: When replacing canister pump module, check the canister pump module interior, canister interior and related pipes for water, fuel and other liquids. If liquids are present, check for disconnections and/or cracks in the following: 1) the pipe from the air inlet port to the canister pump module; 2) the canister filter; and 3) the fuel tank vent hose. If liquids are present in canister interior, replace canister and canister pump module together. Check for filter blockage in the canister. If the charcoal filter inside the canister is clogged, replace the canister. Check for filter blockage in the canister filter. If the canister filter has blockages, replace the canister filter. TEXT IN ILLUSTRATION *1 Fuel Tank Vent Hose *2 Air Inlet Port *3 Vent Hose *4 Fuel Tank *5 Canister Pump Module *6 Canister *7 Canister Filter - - *a Inspection Area (check for disconnection and/or cracks) - - NEXT --> See step 9
7. REPAIR OR REPLACE HARNESS OR CONNECTOR (CANISTER PUMP MODULE - ECM) HINT: If the exhaust tail pipe assembly has been removed, go to the next step before reinstalling it. NEXT --> See step 9
8. REPLACE ECM Replace the ECM. Refer to «REMOVAL»(/toyota/prius-v/i-2011-2014/remont/testing-diagnostics/#engine-control-system-service-information) . NEXT: Go to next step
9. CHECK WHETHER DTC OUTPUT RECURS (DTC P0451, P0452 OR P0453) Connect the Techstream to the DLC3. Turn the power switch on (IG). Turn the Techstream on. Clear the DTCs. Refer to «DTC CHECK / CLEAR»(/toyota/prius-v/i-2011-2014/remont/testing-diagnostics/#engine-control-system-diagnostics-introduction__dtc-check-clear) . Turn the power switch off and wait for 30 seconds. Turn the power switch on (IG). Turn the Techstream on. Perform the Evaporative System Check using the Techstream, referring to the Confirmation Driving Pattern. Enter the following menus: Powertrain / Engine and ECT / Utility / All Readiness. Input the DTC: P0451, P0452 or P0453. Check the DTC judgment result. Result Techstream Display Description NORMAL DTC judgment completed System normal ABNORMAL DTC judgment completed System abnormal INCOMPLETE DTC judgment not completed Perform driving pattern after confirming DTC enabling conditions N/A Unable to perform DTC judgment Number of DTCs which do not fulfill DTC preconditions has reached ECU's memory limit NEXT --> END

The description can be found in the EVAP (Evaporative Emission) System. Refer to DESCRIPTION .

5 hours*1 after the power switch is turned off, the leak detection pump creates negative pressure (vacuum) in the EVAP (Evaporative Emission) system. The ECM monitors for leaks and actuator malfunctions based on the EVAP pressure.

HINT

*1: If the engine coolant temperature is not below 35°C (95°F) 5 hours after the power switch is turned off, the monitor check starts 2 hours later. If it is still not below 35°C (95°F) 7 hours after the power switch is turned off, the monitor check starts 2.5 hours later.

*2: If only a small amount of fuel is in the fuel tank, it takes longer for the EVAP pressure to stabilize.

TEXT IN ILLUSTRATION

Scheme 49

1. P0455: EVAP (Evaporative Emission) gross leak In operation C, the leak detection pump creates negative pressure (vacuum) in the EVAP system and the EVAP system pressure is measured. If the stabilized system pressure is higher than [second reference pressure x 0.2] (near atmospheric pressure), the ECM determines that the EVAP system has a large leak, illuminates the MIL and stores the DTC (2 trip detection logic).
2. P0456: EVAP very small leak In operation C, the leak detection pump creates negative pressure (vacuum) in the EVAP system and the EVAP system pressure is measured. If the stabilized system pressure is higher than second reference pressure, the ECM determines that the EVAP system has a small leak, illuminates the MIL and stores the DTC (2 trip detection logic).

P0455: EVAP GROSS LEAK

P0456: EVAP SMALL LEAK

Refer to EVAP System. Refer to MONITOR RESULT .

Note. The Evaporative System Check (Automatic Mode) consists of 6 steps performed automatically by the Techstream. It takes a maximum of approximately 24 minutes. Do not perform the Evaporative System Check when the fuel tank is more than 90% full because the cut-off valve may be closed, making the fuel tank leak check unavailable. Do not run the engine during this operation. When the temperature of the fuel is 35°C (95°F) or higher, a large amount of vapor forms and any check results become inaccurate. When performing the Evaporative System Check, keep the fuel temperature below 35°C (95°F).

1. Connect the Techstream to the DLC3.
2. Turn the power switch on (IG) and turn the Techstream on.
3. Clear the DTCs (even if no DTCs are stored, perform the clear DTC procedure). Refer to «DTC CHECK / CLEAR»(/toyota/prius-v/i-2011-2014/remont/testing-diagnostics/#engine-control-system-diagnostics-introduction__dtc-check-clear) .
4. Turn the power switch off and wait for 30 seconds.
5. Turn the power switch on (IG) and turn the Techstream on.
6. Enter the following menus: Powertrain / Engine and ECT / Utility / Evaporative System Check / Automatic Mode.
7. After the "Evaporative System Check" is completed, check for All Readiness by entering the following menus: Powertrain / Engine and ECT / Utility / All Readiness.
8. Input the DTC: P0455 or P0456.
9. Check the DTC judgment result. Techstream Display Description NORMAL DTC judgment completed System normal ABNORMAL DTC judgment completed System abnormal INCOMPLETE DTC judgment not completed Perform driving pattern after confirming DTC enabling conditions N/A Unable to perform DTC judgment Number of DTCs which do not fulfill DTC preconditions has reached ECU's memory limit HINT: If the judgment result shows NORMAL, the system is normal. If the judgment result shows ABNORMAL, the system has a malfunction.
10. If the judgment result is INCOMPLETE or N/A and no pending DTC is output, perform a universal trip and check for permanent DTCs. Refer to «DTC CHECK / CLEAR»(/toyota/prius-v/i-2011-2014/remont/testing-diagnostics/#engine-control-system-diagnostics-introduction__dtc-check-clear) . HINT: If a permanent DTC is output, the system is malfunctioning. If no permanent DTC is output, the system is normal.

Refer to the EVAP System. Refer to INSPECTION PROCEDURE .

The idle speed is controlled by the electronic throttle control system. The electronic throttle control system is comprised of: 1) the one valve type throttle body assembly; 2) a throttle actuator, which operates the throttle valve; 3) a throttle position sensor, which detects the opening angle of the throttle valve; 4) an accelerator pedal position sensor, which detects the accelerator pedal position; and 5) the ECM, which controls the electronic throttle control system. Based on the target idle speed, the ECM controls the throttle actuator to provide the proper throttle valve opening angle.

The ECM monitors the idling speed and idling air flow volume to conduct Idle Speed Control (ISC). The ECM determines that the ISC system is malfunctioning if either of the following conditions is met

1. The difference between the target engine idling speed and actual engine idling speed exceeds the threshold and the IAC flow rate learned value is stuck at the upper or lower limit for 5 seconds or more.
2. After driving at a vehicle speed of 10 km/h (6.25 mph) or more, the difference between the target and actual engine idling speed exceeds the threshold 5 times or more during a driving cycle, and then the system determines that the IAC flow rate learned value is stuck at the upper or lower limit, or that the IAC flow rate learned value has been changed by an amount that exceeds the threshold.

Scheme 50

Scheme 51

1. Connect the Techstream to the DLC3.
2. Turn the power switch on (IG) and turn the Techstream on.
3. Enter the following menus: Powertrain / Engine and ECT / Data List / Primary / Coolant Temp.
4. Make sure that the coolant temperature is 25°C (77°F) or less [A].
5. Clear the DTCs (even if no DTCs are stored, perform the clear DTC procedure). Refer to «DTC CHECK / CLEAR»(/toyota/prius-v/i-2011-2014/remont/testing-diagnostics/#engine-control-system-diagnostics-introduction__dtc-check-clear) .
6. Turn the power switch off and wait for 30 seconds.
7. Turn the power switch on (IG) and turn the Techstream on.
8. Put the engine in inspection mode (maintenance mode). Refer to «INSPECTION MODE PROCEDURE»(/toyota/prius-v/i-2011-2014/remont/hoistjack/#introduction) .
9. Start the engine and drive the vehicle until the coolant temperature reaches 70°C (158°F) [B]. HINT: If the coolant temperature is 40°C (104°F) or higher, the engine may stop when idling.
10. Stop the vehicle (0 km/h (0 mph)) for 5 seconds or more [C].
11. Accelerate the vehicle to 10 km/h (6.25 mph) or more for 10 seconds or more [D]. WARNING: When performing the confirmation driving pattern, obey all speed limits and traffic laws. HINT: When accelerating the vehicle, depress the accelerator pedal more than normal to start the engine. The engine may stop during acceleration. However, this will not affect the confirmation driving.
12. Stop the vehicle (0 km/h (0 mph)) for 5 seconds or more [E].
13. Repeat steps [D] and [E] for 5 times or more.
14. Enter the following menus: Powertrain / Engine and ECT / Trouble Codes [F].
15. Read the pending DTCs. HINT: If a pending DTC is output, the system is malfunctioning. If a pending DTC is not output, perform the following procedure.
16. Enter the following menus: Powertrain / Engine and ECT / Utility / All Readiness.
17. Input the DTC: P0505.
18. Check the DTC judgment result. Techstream Display Description NORMAL DTC judgment completed System normal ABNORMAL DTC judgment completed System abnormal INCOMPLETE DTC judgment not completed Perform driving pattern after confirming DTC enabling conditions N/A Unable to perform DTC judgment Number of DTCs which do not fulfill DTC preconditions has reached ECU's memory limit HINT: If the judgment result shows NORMAL, the system is normal. If the judgment result shows ABNORMAL, the system has a malfunction. If the judgment result shows INCOMPLETE or N/A, repeat steps [D] and [E] for 5 times or more.
19. If no pending DTC is output, perform a universal trip and check for permanent DTCs. Refer to «DTC CHECK / CLEAR»(/toyota/prius-v/i-2011-2014/remont/testing-diagnostics/#engine-control-system-diagnostics-introduction__dtc-check-clear) . HINT: If a permanent DTC is output, the system is malfunctioning. If a permanent DTC is not output, the system is normal.

HINT

1. The following conditions may also cause DTC P0505 to be stored: The floor carpet overlapping slightly onto the accelerator pedal, causing the accelerator pedal to be slightly depressed and therefore the throttle valve position to be slightly open. The accelerator pedal being not fully released.
2. Read freeze frame data using the Techstream. The ECM records vehicle and driving condition information as freeze frame data the moment a DTC is stored. When troubleshooting, freeze frame data can be helpful in determining whether the vehicle was running or stopped, whether the engine was warmed up or not, whether the air fuel ratio was lean or rich, as well as other data recorded at the time of a malfunction.
3. Refer to "Data List / Active Test" [Engine Speed and ISC Learning Value]. Refer to «DATA LIST / ACTIVE TEST»(/toyota/prius-v/i-2011-2014/remont/testing-diagnostics/#engine-control-system-diagnostics-introduction) .

1. CHECK ANY OTHER DTCS OUTPUT (IN ADDITION TO DTC P0505) Connect the Techstream to the DLC3. Turn the power switch on (IG). Turn the Techstream on. Enter the following menus: Powertrain / Engine and ECT / Trouble Codes. Read the DTCs. RESULT Result Proceed to DTC P0505 is output A DTC P0505 and other DTCs are output B HINT: If any DTCs other than P0505 are output, troubleshoot those DTCs first. B --> See step 9 A: Go to next step
2. CHECK PCV HOSE CONNECTIONS Check the PCV hose connections. Refer to «COMPONENTS»(/toyota/prius-v/i-2011-2014/remont/auxiliary-emission-control-systems/#emission-control-system-service-information) . OK PCV valve and hose are connected correctly and are not damaged. NG --> REPAIR OR REPLACE PCV HOSE OK: Go to next step
3. CHECK INTAKE SYSTEM Check the intake system for vacuum leaks. Refer to «ON-VEHICLE INSPECTION»(/toyota/prius-v/i-2011-2014/remont/mechanical/#engine-intake-system-inspection) . OK No leaks from the intake system. NG --> REPAIR OR REPLACE INTAKE SYSTEM OK: Go to next step
4. PERFORM ACTIVE TEST USING TECHSTREAM (CONTROL THE EGR STEP POSITION) Connect the Techstream to the DLC3. Turn the power switch on (IG). Turn the Techstream on. Put the engine in inspection mode (maintenance mode). Refer to «INSPECTION MODE PROCEDURE»(/toyota/prius-v/i-2011-2014/remont/hoistjack/#introduction) . Start the engine and warm it up until the engine coolant temperature reaches 75°C (167°F) or higher. HINT: The A/C switch and all accessory switches should be off. Enter the following menus: Powertrain / Engine and ECT / Active Test / Control the EGR Step Position / Data List / Primary / MAP. Check the engine idling condition and MAP values in the Data List while performing the Active Test. HINT: Do not leave the EGR valve open for 10 seconds or more during the Active Test. Be sure to return the EGR valve to step 0 when the Active Test is completed. Do not open the EGR valve 30 steps or more during the Active Test. OK MAP and idling condition change in response to EGR step position. Standard - EGR Step Position (Active Test) 0 Steps 0 to 30 Steps Idling condition Steady idling Idling changes from steady to rough idling or engine stalls MAP (Data List) MAP value is 20 to 40 kPa (150 to 300 mmHg) (EGR valve is fully closed) MAP value is at least +10 kPa (75 mmHg) higher than when EGR valve is fully closed HINT: During Active Test, if the idling condition does not change in response to EGR step position, then there is probably a malfunction in the EGR valve. Result Result Proceed to Outside of standard range A Within standard range B B --> See step 6 A: Go to next step
5. INSPECT EGR VALVE ASSEMBLY Remove the EGR valve assembly. Refer to «REMOVAL»(/toyota/prius-v/i-2011-2014/remont/auxiliary-emission-control-systems/#emission-control-system-service-information) . Check if the EGR valve is stuck open. OK EGR valve is tightly closed. NG --> See step 10 OK: Go to next step
6. INSPECT THROTTLE BODY ASSEMBLY (THROTTLE VALVE) Check for contamination between the throttle valve and the housing and then check that the throttle valve moves smoothly. OK Throttle valve is not contaminated with foreign objects and moves smoothly. NG --> See step 11 OK: Go to next step
7. CONFIRM WHETHER MALFUNCTION HAS BEEN SUCCESSFULLY REPAIRED Connect the Techstream to the DLC3. Turn the power switch on (IG). Turn the Techstream on. Clear the DTCs. Refer to «DTC CHECK / CLEAR»(/toyota/prius-v/i-2011-2014/remont/testing-diagnostics/#engine-control-system-diagnostics-introduction__dtc-check-clear) . Turn the power switch off. Drive the vehicle in accordance with the driving pattern described in the Confirmation Driving Pattern. Enter the following menus: Powertrain / Engine and ECT / Trouble Codes / Pending. Read the pending DTCs. RESULT Result Proceed to DTC P0505 is output A DTC is not output B B --> END A --> See step 8
8. REPLACE ECM. Refer to «REMOVAL»(/toyota/prius-v/i-2011-2014/remont/testing-diagnostics/#engine-control-system-service-information)
9. GO TO DTC CHART. Refer to «DIAGNOSTIC TROUBLE CODE CHART»(/toyota/prius-v/i-2011-2014/remont/testing-diagnostics/#engine-control-system-diagnostics-introduction__diagnostic-trouble-code-chart)
10. REPLACE EGR VALVE ASSEMBLY. Refer to «REMOVAL»(/toyota/prius-v/i-2011-2014/remont/auxiliary-emission-control-systems/#emission-control-system-service-information)
11. REPLACE THROTTLE BODY ASSEMBLY. Refer to «REMOVAL»(/toyota/prius-v/i-2011-2014/remont/testing-diagnostics/#engine-control-system-service-information)

This monitor will run when the engine is started at an engine coolant temperature of -10 to 50°C (14 to 122°F). The DTC will be stored after the engine idles for 13 seconds (2 trip detection logic).

The DTC is designed to monitor the idle air control at cold start. When the engine is started at an engine coolant temperature of less than 50°C (122°F), the ECM measures the accumulated mass air flow during engine idling. If the accumulated mass air flow does not reach the specified level within 10 seconds, the ECM interprets this as a malfunction. The MIL is illuminated and a DTC is stored when the malfunction is detected in consecutive driving cycles (2 trip detection logic).

The electronic throttle control system controls the idle speed. The electronic throttle control system operates the throttle actuator to open and close the throttle valve, and adjusts the intake air amount to achieve the target idle speed.

Note. When the negative (-) auxiliary battery terminal is disconnected during inspection or repairs, the idle speed control learned values are cleared. Idle speed control learning needs to be performed before this DTC can be stored. To perform idle speed control learning, the engine must be warmed up by allowing it to idle for 5 minutes. For idle speed control learning to be successful, when the engine is started to warm it up, there must be at least 10 seconds of idling with the coolant temperature below 50°C (122°F) before allowing it to continue running for the 5 minute learning period.

HINT

The idle speed control learning is performed when the engine is warmed up and has been idling for 5 minutes.

Scheme 52

1. Connect the Techstream to the DLC3.
2. Turn the power switch on (IG) and turn the Techstream on.
3. Clear the DTCs (even if no DTCs are stored, perform the clear DTC procedure). Refer to «DTC CHECK / CLEAR»(/toyota/prius-v/i-2011-2014/remont/testing-diagnostics/#engine-control-system-diagnostics-introduction__dtc-check-clear) .
4. Turn the power switch off and wait for 30 seconds.
5. Turn the power switch on (IG) and turn the Techstream on [A].
6. Enter the following menus: Powertrain / Engine and ECT / Data List / Primary / Coolant Temp.
7. Check that "Coolant Temp" in the Data List is within the range of -10 to 50°C (14 to 122°F).
8. Put the engine in inspection mode (maintenance mode). Refer to «INSPECTION MODE PROCEDURE»(/toyota/prius-v/i-2011-2014/remont/hoistjack/#introduction) .
9. Start the engine and warm it up until the coolant temperature is the same as the coolant temperature in the freeze frame data.
10. Idle the engine for 1 minute or more.
11. Enter the following menus: Powertrain / Engine and ECT / Trouble Codes [B].
12. Read the pending DTCs. HINT: If a pending DTC is output, the system is malfunctioning. If a pending DTC is not output, perform the following procedure.
13. Enter the following menus: Powertrain / Engine and ECT / Utility / All Readiness.
14. Input the DTC: P050A.
15. Check the DTC judgment result. Techstream Display Description NORMAL DTC judgment completed System normal ABNORMAL DTC judgment completed System abnormal INCOMPLETE DTC judgment not completed Perform driving pattern after confirming DTC enabling conditions N/A Unable to perform DTC judgment Number of DTCs which do not fulfill DTC preconditions has reached ECU memory limit HINT: If the judgment result shows NORMAL, the system is normal. If the judgment result shows ABNORMAL, the system has a malfunction. If the judgment result shows INCOMPLETE or N/A, idle the engine for 3 minutes, let the engine cool down, and then perform steps [A] and [B].
16. If no pending DTC is output, perform a universal trip and check for permanent DTCs. Refer to «DTC CHECK / CLEAR»(/toyota/prius-v/i-2011-2014/remont/testing-diagnostics/#engine-control-system-diagnostics-introduction__dtc-check-clear) . HINT: If a permanent DTC is output, the system is malfunctioning. If no permanent DTC is output, the system is normal.

Note. Inspect the fuses for circuits related to this system before performing the following inspection procedure.

HINT

Read freeze frame data using the Techstream. The ECM records vehicle and driving condition information as freeze frame data the moment a DTC is stored. When troubleshooting, freeze frame data can help determine if the vehicle was moving or stationary, if the engine was warmed up or not, if the air fuel ratio was lean or rich, and other data from the time the malfunction occurred.

1. CHECK ANY OTHER DTCS OUTPUT (IN ADDITION TO DTC P050A) Connect the Techstream to the DLC3. Turn the power switch on (IG). Turn the Techstream on. Enter the following the menus: Powertrain / Engine and ECT / Trouble Codes. Read the DTCs. RESULT Result Proceed to DTC P050A is output A DTC P050A and other DTCs are output B HINT: If any DTCs other than P050A are output, troubleshoot those DTCs first. B --> See step 26 A: Go to next step
2. READ VALUE USING TECHSTREAM (FUEL TRIM) HINT: Calculate the total fuel trim values to check the characteristic deviation of the mass air flow meter sub-assembly. Connect the Techstream to the DLC3. Turn the power switch on (IG) and turn the Techstream on. Put the engine in inspection mode (maintenance mode). Refer to «INSPECTION MODE PROCEDURE»(/toyota/prius-v/i-2011-2014/remont/hoistjack/#introduction) . Start the engine. Enter the following menus: Powertrain / Engine and ECT / Data List / Gas AF Control / Short FT #1 and Long FT #1. Read the values displayed on the Techstream. Add together the Short FT #1 and Long FT #1 values to obtain the total fuel trim. Standard Total of Short FT #1 and Long FT #1 values is between -20% and 20%. NG --> See step 7 OK: Go to next step
3. INSPECT THROTTLE BODY ASSEMBLY (THROTTLE VALVE) Check for deposits around the throttle valve and throttle valve condition. OK No deposits around throttle valve and throttle valve moves smoothly. NG --> See step 6 OK: Go to next step
4. PERFORM ACTIVE TEST USING TECHSTREAM (CONTROL THE EGR STEP POSITION) Connect the Techstream to the DLC3. Turn the power switch on (IG). Turn the Techstream on. Put the engine in inspection mode (maintenance mode). Refer to «INSPECTION MODE PROCEDURE»(/toyota/prius-v/i-2011-2014/remont/hoistjack/#introduction) . Start the engine and warm it up until the engine coolant temperature reaches 75°C (167°F) or higher. HINT: The A/C switch and all accessory switches should be off. Enter the following menus: Powertrain / Engine and ECT / Active Test / Control the EGR Step Position / Data List / Primary / MAP. Check the engine idling condition and MAP values in the Data List while performing the Active Test. HINT: Do not leave the EGR valve open for 10 seconds or more during Active Test. Be sure to return the EGR valve to step 0 when Active Test is completed. Do not open the EGR valve 30 steps or more during the Active Test. OK MAP and idling condition change in response to EGR step position. Standard - EGR Step Position (Active Test) 0 Steps 0 to 30 Steps Idling condition Steady idling Idling changes from steady to rough idling or engine stalls MAP (Data List) MAP value is 20 to 40 kPa (150 to 300 mmHg) (EGR valve is fully closed) MAP value is at least +10 kPa (75 mmHg) higher than when EGR valve is fully closed HINT: During Active Test, if the idling condition does not change in response to EGR step position, then there is probably a malfunction in EGR valve. Result Result Proceed to Outside of standard range A Within standard range B B --> See step 19 A: Go to next step
5. INSPECT EGR VALVE ASSEMBLY Remove the EGR valve assembly. Refer to «REMOVAL»(/toyota/prius-v/i-2011-2014/remont/auxiliary-emission-control-systems/#emission-control-system-service-information) . Check if the EGR valve is stuck open. OK EGR valve is tightly closed. OK --> See step 19 NG --> See step 17
6. REPAIR OR REPLACE THROTTLE BODY ASSEMBLY Repair or replace the throttle body assembly. Refer to «REMOVAL»(/toyota/prius-v/i-2011-2014/remont/testing-diagnostics/#engine-control-system-service-information) . NEXT --> See step 19
7. CHECK PCV SYSTEM Check the PCV hose connections. Refer to «COMPONENTS»(/toyota/prius-v/i-2011-2014/remont/auxiliary-emission-control-systems/#emission-control-system-service-information) . OK PCV valve and hose are connected correctly and are not damaged. NG --> See step 14 OK: Go to next step
8. CHECK INTAKE SYSTEM Check the intake system for vacuum leaks. Refer to «ON-VEHICLE INSPECTION»(/toyota/prius-v/i-2011-2014/remont/mechanical/#engine-intake-system-inspection) . OK No leaks in intake system. NG --> See step 15 OK: Go to next step
9. INSPECT AIR CLEANER FILTER ELEMENT SUB-ASSEMBLY Visually check that the air cleaner filter element sub-assembly is not excessively contaminated with dirt or oil. OK Air cleaner filter element is not excessively contaminated with dirt or oil. NG --> See step 16 OK: Go to next step
10. PERFORM ACTIVE TEST USING TECHSTREAM (CONTROL THE EGR STEP POSITION) Connect the Techstream to the DLC3. Turn the power switch on (IG). Turn the Techstream on. Put the engine in inspection mode (maintenance mode). Refer to «INSPECTION MODE PROCEDURE»(/toyota/prius-v/i-2011-2014/remont/hoistjack/#introduction) . Start the engine and warm it up until the engine coolant temperature reaches 75°C (167°F) or higher. HINT: The A/C switch and all accessory switches should be off. Enter the following menus: Powertrain / Engine and ECT / Active Test / Control the EGR Step Position / Data List / Primary / MAP. Check the engine idling condition and MAP values in the Data List while performing the Active Test. HINT: Do not leave the EGR valve open for 10 seconds or more during Active Test. Be sure to return the EGR valve to step 0 when Active Test is completed. Do not open the EGR valve 30 steps or more during the Active Test. OK MAP and idling condition change in response to EGR step position. Standard - EGR Step Position (Active Test) 0 Steps 0 to 30 Steps Idling condition Steady idling Idling changes from steady to rough idling or engine stalls MAP (Data List) MAP value is 20 to 40 kPa (150 to 300 mmHg) (EGR valve is fully closed) MAP value is at least +10 kPa (75 mmHg) higher than when EGR valve is fully closed HINT: During Active Test, if the idling condition does not change in response to EGR step position, then there is probably a malfunction in EGR valve. Result Result Proceed to Outside of standard range A Within standard range B B --> See step 12 A: Go to next step
11. INSPECT EGR VALVE ASSEMBLY Remove the EGR valve assembly. Refer to «REMOVAL»(/toyota/prius-v/i-2011-2014/remont/auxiliary-emission-control-systems/#emission-control-system-service-information) . Check if the EGR valve is stuck open. OK EGR valve is tightly closed. NG --> See step 17 OK: Go to next step
12. PERFORM ACTIVE TEST USING TECHSTREAM (CONTROL THE VVT LINEAR) Operate the VVT system through the Active test, and check if the VVT system is operating normally. Perform the Active Test, referring to DTC P0011 inspection procedure (VVT system for intake camshaft). Refer to «PROCEDURE - Step 2»(/toyota/prius-v/i-2011-2014/remont/testing-diagnostics/#engine-control-system-diagnostic-codes) . NG --> See step 18 OK: Go to next step
13. READ VALUE USING TECHSTREAM (MAF). Refer to «PROCEDURE - Step 6»(/toyota/prius-v/i-2011-2014/remont/testing-diagnostics/#engine-control-system-diagnostic-codes) OK --> See step 19 NG --> See step 21
14. REPAIR OR REPLACE PCV HOSE Repair or replace the PCV valve and hose. NEXT --> See step 19
15. REPAIR OR REPLACE INTAKE SYSTEM Repair or replace the intake system. NEXT --> See step 19
16. REPLACE AIR CLEANER FILTER ELEMENT SUB-ASSEMBLY Replace the air cleaner filter element sub-assembly. NEXT --> See step 19
17. REPLACE EGR VALVE ASSEMBLY Replace the EGR valve assembly. Refer to «REMOVAL»(/toyota/prius-v/i-2011-2014/remont/auxiliary-emission-control-systems/#emission-control-system-service-information) . NEXT --> See step 19
18. CHECK AND REPAIR VVT SYSTEM Check and repair the VVT system. HINT: Refer to DTC P0011 Inspection Procedure for intake camshaft. Refer to «INSPECTION PROCEDURE»(/toyota/prius-v/i-2011-2014/remont/testing-diagnostics/#engine-control-system-diagnostic-codes) . NEXT: Go to next step
19. CHECK WHETHER DTC OUTPUT RECURS (DTC P050A) NOTE: In this operation, the engine must be cold (approximately the same level as the engine coolant temperature recorded in the freeze frame data). Connect the Techstream to the DLC3. Turn the power switch on (IG). Turn the Techstream on. Clear the DTCs. Refer to «DTC CHECK / CLEAR»(/toyota/prius-v/i-2011-2014/remont/testing-diagnostics/#engine-control-system-diagnostics-introduction__dtc-check-clear) . Turn the power switch off and wait for 30 seconds. Drive the vehicle in accordance with the driving pattern described in the Confirmation Driving Pattern. Enter the following menus: Powertrain / Engine and ECT / Utility / All Readiness. Input the DTC: P050A. Check the DTC judgment result. RESULT Result Proceed to NORMAL (DTC is not output) A ABNORMAL (DTC P050A is output) B B --> See step 21 A --> See step 20
20. CHECK FOR INTERMITTENT PROBLEMS. Refer to «CHECK FOR INTERMITTENT PROBLEMS»(/toyota/prius-v/i-2011-2014/remont/testing-diagnostics/#engine-control-system-diagnostics-introduction__check-for-intermittent-problems)
21. CHECK HARNESS AND CONNECTOR (MASS AIR FLOW METER SUB-ASSEMBLY CONNECTOR CONNECTION) Check the connection and terminal contact pressure of connectors and wire harnesses between the mass air flow meter sub-assembly and ECM. Refer to «ELECTRONIC CIRCUIT INSPECTION PROCEDURE»(/toyota/prius-v/i-2011-2014/remont/hoistjack/#introduction) . HINT: Repair any problems. NEXT: Go to next step
22. CHECK WHETHER DTC OUTPUT RECURS (DTC P050A) NOTE: In this operation, the engine must be cold (approximately the same as the engine coolant temperature recorded in the freeze frame data). Connect the Techstream to the DLC3. Turn the power switch on (IG). Turn the Techstream on. Clear the DTCs. Refer to «DTC CHECK / CLEAR»(/toyota/prius-v/i-2011-2014/remont/testing-diagnostics/#engine-control-system-diagnostics-introduction__dtc-check-clear) . Turn the power switch off and wait for 30 seconds. Drive the vehicle in accordance with the driving pattern described in the Confirmation Driving Pattern. Enter the following menus: Powertrain / Engine and ECT / Utility / All Readiness. Check the DTC judgment result. RESULT Result Proceed to ABNORMAL (DTC P050A is output) A NORMAL (DTC is not output) B B --> END A: Go to next step
23. CHECK HARNESS AND CONNECTOR (MASS AIR FLOW METER SUB-ASSEMBLY - ECM). Refer to «PROCEDURE - Step 3»(/toyota/prius-v/i-2011-2014/remont/testing-diagnostics/#engine-control-system-diagnostic-codes) NG --> REPAIR OR REPLACE HARNESS OR CONNECTOR OK: Go to next step
24. REPLACE MASS AIR FLOW METER SUB-ASSEMBLY Replace the mass air flow meter sub-assembly. Refer to «REMOVAL»(/toyota/prius-v/i-2011-2014/remont/testing-diagnostics/#engine-control-system-service-information) . HINT: If the result of the inspection performed in step 13 indicated no problem, proceed to the next step without replacing the mass air flow meter sub-assembly. NEXT: Go to next step
25. CONFIRM WHETHER MALFUNCTION HAS BEEN SUCCESSFULLY REPAIRED NOTE: In this operation, the engine must be cold (approximately the same level as the engine coolant temperature recorded in the freeze frame data). Connect the Techstream to the DLC3. Turn the power switch on (IG). Turn the Techstream on. Clear the DTCs. Refer to «DTC CHECK / CLEAR»(/toyota/prius-v/i-2011-2014/remont/testing-diagnostics/#engine-control-system-diagnostics-introduction__dtc-check-clear) . Turn the power switch off and wait for 30 seconds. Drive the vehicle in accordance with the driving pattern described in the Confirmation Driving Pattern. Enter the following menus: Powertrain / Engine and ECT / Utility / All Readiness. Input the DTC: P050A. Check the DTC judgment result. RESULT Result Proceed to NORMAL (DTC is not output) A ABNORMAL (DTC P050A is output) B B --> See step 27 A --> END
26. GO TO DTC CHART. Refer to «DIAGNOSTIC TROUBLE CODE CHART»(/toyota/prius-v/i-2011-2014/remont/testing-diagnostics/#engine-control-system-diagnostics-introduction__diagnostic-trouble-code-chart)
27. REPLACE ECM. Refer to «REMOVAL»(/toyota/prius-v/i-2011-2014/remont/testing-diagnostics/#engine-control-system-service-information)

This monitor will run when the engine is started at an engine coolant temperature of -10 to 50°C (14 to 122°F). The DTC is stored after the engine idles for 13 seconds (2 trip detection logic).

The DTC is designed to monitor the ignition timing at cold start. When the engine is started at an engine coolant temperature of less than 50°C (122°F), the ECM checks the ignition timing during engine idling. If the ignition timing advances beyond the specified level within 10 seconds, the ECM interprets this as a malfunction. The MIL is illuminated and a DTC is stored when the malfunction is detected in consecutive driving cycles (2 trip detection logic).

Note. When the negative (-) auxiliary battery terminal is disconnected during inspection or repairs, the idle speed control learned values are cleared. Idle speed control learning needs to be performed before this DTC can be stored. To perform idle speed control learning, the engine must be warmed up by allowing it to idle for 5 minutes. For idle speed control learning to be successful, when the engine is started to warm it up, there must be at least 10 seconds of idling with the coolant temperature below 50°C (122°F) before allowing it to continue running for the 5 minute learning period.

Scheme 53

1. Connect the Techstream to the DLC3.
2. Turn the power switch on (IG) and turn the Techstream on.
3. Clear the DTCs (even if no DTCs are stored, perform the clear DTC procedure). Refer to «DTC CHECK / CLEAR»(/toyota/prius-v/i-2011-2014/remont/testing-diagnostics/#engine-control-system-diagnostics-introduction__dtc-check-clear) .
4. Turn the power switch off and wait for 30 seconds.
5. Turn the power switch on (IG) and turn the Techstream on [A].
6. Enter the following menus: Powertrain / Engine and ECT / Data List / Primary / Coolant Temp.
7. Check that "Coolant Temp" in the Data List is within the range of -10 to 50°C (14 to 122°F).
8. Put the engine in inspection mode (maintenance mode). Refer to «INSPECTION MODE PROCEDURE»(/toyota/prius-v/i-2011-2014/remont/hoistjack/#introduction) .
9. Start the engine and warm it up until the coolant temperature is the same as the coolant temperature in the freeze frame data.
10. Idle the engine for 1 minute or more.
11. Enter the following menus: Powertrain / Engine and ECT / Trouble Codes [B].
12. Read the pending DTCs. HINT: If a pending DTC is output, the system is malfunctioning. If a pending DTC is not output, perform the following procedure.
13. Enter the following menus: Powertrain / Engine and ECT / Utility / All Readiness.
14. Input the DTC: P050B.
15. Check the DTC judgment result. Techstream Display Description NORMAL DTC judgment completed System normal ABNORMAL DTC judgment completed System abnormal INCOMPLETE DTC judgment not completed Perform driving pattern after confirming DTC enabling conditions N/A Unable to perform DTC judgment Number of DTCs which do not fulfill DTC preconditions has reached ECU's memory limit HINT: If the judgment result shows NORMAL, the system is normal. If the judgment result shows ABNORMAL, the system has a malfunction. If the judgment result shows INCOMPLETE or N/A, idle the engine for 3 minutes, let the engine cool down, and then perform steps [A] and [B].
16. If no pending DTC is output, perform a universal trip and check for permanent DTCs. Refer to «DTC CHECK / CLEAR»(/toyota/prius-v/i-2011-2014/remont/testing-diagnostics/#engine-control-system-diagnostics-introduction__dtc-check-clear) . HINT: If a permanent DTC is output, the system is malfunctioning. If no permanent DTC is output, the system is normal.

Note. Inspect the fuses for circuits related to this system before performing the following inspection procedure.

HINT

1. DTC P050B may be output when the engine shows the symptom as listed below. If necessary, check the trouble area as listed below. Symptom Factor Trouble Area Low idle speed at engine cold (immediately after engine start) Excessive engine friction Engine oil deterioration Rough idle at engine cold (immediately after engine start) Abnormal combustion Fuel quality
2. Read freeze frame data using the Techstream. The ECM records vehicle and driving condition information as freeze frame data the moment a DTC is stored. When troubleshooting, freeze frame data can help determine if the vehicle was moving or stationary, if the engine was warmed up or not, if the air fuel ratio was lean or rich, and other data from the time the malfunction occurred.

1. CHECK ANY OTHER DTCS OUTPUT (IN ADDITION TO DTC P050B) Connect the Techstream to the DLC3. Turn the power switch on (IG). Turn the Techstream on. Enter the following the menus: Powertrain / Engine and ECT / Trouble Codes. Read the DTCs. RESULT Result Proceed to DTC P050B is output A DTC P050B and other DTCs are output B HINT: If any DTCs other than P050B are output, troubleshoot those DTCs first. B --> See step 26 A: Go to next step
2. READ VALUE USING TECHSTREAM (FUEL TRIM) HINT: Calculate the total fuel trim values to check the characteristic deviation of the mass air flow meter sub-assembly. Connect the Techstream to the DLC3. Turn the power switch on (IG) and turn the Techstream on. Put the engine in inspection mode (maintenance mode). Refer to «INSPECTION MODE PROCEDURE»(/toyota/prius-v/i-2011-2014/remont/hoistjack/#introduction) . Start the engine. Enter the following menus: Powertrain / Engine and ECT / Data List / Gas AF Control / Short FT #1 and Long FT #1. Read the values displayed on the Techstream. Add together the Short FT #1 and Long FT #1 values to obtain the total fuel trim. Standard Total of Short FT #1 and Long FT #1 values is between -20% and 20%. NG --> See step 7 OK: Go to next step
3. INSPECT THROTTLE BODY ASSEMBLY (THROTTLE VALVE) Check for deposits around the throttle valve and throttle valve condition. OK No deposits around throttle valve and throttle valve moves smoothly. NG --> See step 6 OK: Go to next step
4. PERFORM ACTIVE TEST USING TECHSTREAM (CONTROL THE EGR STEP POSITION) Connect the Techstream to the DLC3. Turn the power switch on (IG). Turn the Techstream on. Put the engine in inspection mode (maintenance mode). Refer to «INSPECTION MODE PROCEDURE»(/toyota/prius-v/i-2011-2014/remont/hoistjack/#introduction) . Start the engine and warm it up until the engine coolant temperature reaches 75°C (167°F) or higher. HINT: The A/C switch and all accessory switches should be off. Enter the following menus: Powertrain / Engine and ECT / Active Test / Control the EGR Step Position / Data List / Primary / MAP. Check the engine idling condition and MAP values in the Data List while performing the Active Test. HINT: Do not leave the EGR valve open for 10 seconds or more during the Active Test. Be sure to return the EGR valve to step 0 when Active Test is completed. Do not open the EGR valve 30 steps or more during the Active Test. OK MAP and idling condition change in response to EGR step position. Standard - EGR Step Position (Active Test) 0 Steps 0 to 30 Steps Idling condition Steady idling Idling changes from steady to rough idling or engine stalls MAP (Data List) MAP value is 20 to 40 kPa (150 to 300 mmHg) (EGR valve is fully closed) MAP value is at least +10 kPa (75 mmHg) higher than when EGR valve is fully closed HINT: During Active Test, if the idling condition does not change in response to EGR step position, then there is probably a malfunction in EGR valve. Result Result Proceed to Outside of standard range A Within standard range B B --> See step 19 A: Go to next step
5. INSPECT EGR VALVE ASSEMBLY Remove the EGR valve assembly. Refer to «REMOVAL»(/toyota/prius-v/i-2011-2014/remont/auxiliary-emission-control-systems/#emission-control-system-service-information) . Check if the EGR valve is stuck open. OK EGR valve is tightly closed. OK --> See step 19 NG --> See step 17
6. REPAIR OR REPLACE THROTTLE BODY ASSEMBLY Repair or replace the throttle body assembly. Refer to «REMOVAL»(/toyota/prius-v/i-2011-2014/remont/testing-diagnostics/#engine-control-system-service-information) . NEXT --> See step 19
7. CHECK PCV SYSTEM Check the PCV hose connections. Refer to «COMPONENTS»(/toyota/prius-v/i-2011-2014/remont/auxiliary-emission-control-systems/#emission-control-system-service-information) . OK PCV valve and hose are connected correctly and are not damaged. NG --> See step 14 OK: Go to next step
8. CHECK INTAKE SYSTEM Check the intake system for vacuum leaks. Refer to «ON-VEHICLE INSPECTION»(/toyota/prius-v/i-2011-2014/remont/mechanical/#engine-intake-system-inspection) . OK No leaks in intake system. NG --> See step 15 OK: Go to next step
9. INSPECT AIR CLEANER FILTER ELEMENT SUB-ASSEMBLY Visually check that the air cleaner filter element sub-assembly is not excessively contaminated with dirt or oil. OK Air cleaner filter element sub-assembly is not excessively contaminated with dirt or oil. NG --> See step 16 OK: Go to next step
10. PERFORM ACTIVE TEST USING TECHSTREAM (CONTROL THE EGR STEP POSITION) Connect the Techstream to the DLC3. Turn the power switch on (IG). Turn the Techstream on. Put the engine in inspection mode (maintenance mode). Refer to «INSPECTION MODE PROCEDURE»(/toyota/prius-v/i-2011-2014/remont/hoistjack/#introduction) . Start the engine and warm it up until the engine coolant temperature reaches 75°C (167°F) or higher. HINT: The A/C switch and all accessory switches should be off. Enter the following menus: Powertrain / Engine and ECT / Active Test / Control the EGR Step Position / Data List / Primary / MAP. Check the engine idling condition and MAP values in the Data List while performing the Active Test. HINT: Do not leave the EGR valve open for 10 seconds or more during the Active Test. Be sure to return the EGR valve to step 0 when Active Test is completed. Do not open the EGR valve 30 steps or more during the Active Test. OK MAP and idling condition change in response to EGR step position. Standard - EGR Step Position (Active Test) 0 Steps 0 to 30 Steps Idling condition Steady idling Idling changes from steady to rough idling or engine stalls MAP (Data List) MAP value is 20 to 40 kPa (150 to 300 mmHg) (EGR valve is fully closed) MAP value is at least +10 kPa (75 mmHg) higher than when EGR valve is fully closed HINT: During Active Test, if the idling condition does not change in response to EGR step position, then there is probably a malfunction in EGR valve. Result Result Proceed to Outside of standard range A Within standard range B B --> See step 12 A: Go to next step
11. INSPECT EGR VALVE ASSEMBLY Remove the EGR valve assembly. Refer to «REMOVAL»(/toyota/prius-v/i-2011-2014/remont/auxiliary-emission-control-systems/#emission-control-system-service-information) . Check if the EGR valve is stuck open. OK EGR valve is tightly closed. NG --> See step 17 OK: Go to next step
12. PERFORM ACTIVE TEST USING TECHSTREAM (CONTROL THE VVT LINEAR) Operate the VVT system through the Active test, and check if the VVT system is operating normally. Perform the Active Test, referring to DTC P0011 inspection procedure (VVT system for intake camshaft). Refer to «PROCEDURE - Step 2»(/toyota/prius-v/i-2011-2014/remont/testing-diagnostics/#engine-control-system-diagnostic-codes) . NG --> See step 18 OK: Go to next step
13. READ VALUE USING TECHSTREAM (MAF). Refer to «PROCEDURE - Step 6»(/toyota/prius-v/i-2011-2014/remont/testing-diagnostics/#engine-control-system-diagnostic-codes) OK --> See step 19 NG --> See step 21
14. REPAIR OR REPLACE PCV HOSE Repair or replace the PCV hose. NEXT --> See step 19
15. REPAIR OR REPLACE INTAKE SYSTEM Repair or replace the intake system. NEXT --> See step 19
16. REPLACE AIR CLEANER FILTER ELEMENT SUB-ASSEMBLY Replace the air cleaner filter element sub-assembly. NEXT --> See step 19
17. REPLACE EGR VALVE ASSEMBLY Replace the EGR valve assembly. Refer to «REMOVAL»(/toyota/prius-v/i-2011-2014/remont/auxiliary-emission-control-systems/#emission-control-system-service-information) . NEXT --> See step 19
18. CHECK AND REPAIR VVT SYSTEM Check and repair the VVT system. HINT: Refer to DTC P0011 Inspection Procedure for intake camshaft. Refer to «INSPECTION PROCEDURE»(/toyota/prius-v/i-2011-2014/remont/testing-diagnostics/#engine-control-system-diagnostic-codes) . NEXT: Go to next step
19. WHETHER DTC OUTPUT RECURS (DTC P050B) NOTE: In this operation, the engine must be cold (approximately the same level as the engine coolant temperature recorded in the freeze frame data). Connect the Techstream to the DLC3. Turn the power switch on (IG). Turn the Techstream on. Clear the DTCs. Refer to «DTC CHECK / CLEAR»(/toyota/prius-v/i-2011-2014/remont/testing-diagnostics/#engine-control-system-diagnostics-introduction__dtc-check-clear) . Turn the power switch off and wait for 30 seconds. Drive the vehicle in accordance with the driving pattern described in the Confirmation Driving Pattern. Enter the following menus: Powertrain / Engine and ECT / Utility / All Readiness. Input the DTC: P050B. Check the DTC judgment result. RESULT Result Proceed to NORMAL (DTC is not output) A ABNORMAL (DTC P050B is output) B B --> See step 21 A --> See step 20
20. CHECK FOR INTERMITTENT PROBLEMS. Refer to «CHECK FOR INTERMITTENT PROBLEMS»(/toyota/prius-v/i-2011-2014/remont/testing-diagnostics/#engine-control-system-diagnostics-introduction__check-for-intermittent-problems)
21. CHECK HARNESS AND CONNECTOR (MASS AIR FLOW METER SUB-ASSEMBLY CONNECTOR CONNECTION) Check the connection and terminal contact pressure of connectors and wire harnesses between the mass air flow meter sub-assembly and ECM. Refer to «ELECTRONIC CIRCUIT INSPECTION PROCEDURE»(/toyota/prius-v/i-2011-2014/remont/hoistjack/#introduction) . HINT: Repair any problems. NEXT: Go to next step
22. CHECK WHETHER DTC OUTPUT RECURS (P050B) NOTE: In this operation, the engine must be cold (approximately the same as the engine coolant temperature recorded in the freeze frame data). Connect the Techstream to the DLC3. Turn the power switch on (IG). Turn the Techstream on. Clear the DTCs. Refer to «DTC CHECK / CLEAR»(/toyota/prius-v/i-2011-2014/remont/testing-diagnostics/#engine-control-system-diagnostics-introduction__dtc-check-clear) . Turn the power switch off and wait for 30 seconds. Drive the vehicle in accordance with the driving pattern described in the Confirmation Driving Pattern. Enter the following menus: Powertrain / Engine and ECT / Utility / All Readiness. Check the DTC judgment result. RESULT Result Proceed to ABNORMAL (DTC P050B is output) A NORMAL (DTC is not output) B B --> END A: Go to next step
23. CHECK HARNESS AND CONNECTOR (MASS AIR FLOW METER SUB-ASSEMBLY - ECM). Refer to «PROCEDURE - Step 3»(/toyota/prius-v/i-2011-2014/remont/testing-diagnostics/#engine-control-system-diagnostic-codes) NG --> REPAIR OR REPLACE HARNESS OR CONNECTOR OK: Go to next step
24. REPLACE MASS AIR FLOW METER SUB-ASSEMBLY Replace the mass air flow meter sub-assembly. Refer to «REMOVAL»(/toyota/prius-v/i-2011-2014/remont/testing-diagnostics/#engine-control-system-service-information) . HINT: If the result of the inspection performed in step 13 indicated no problem, proceed to the next step without replacing the mass air flow meter sub-assembly. NEXT: Go to next step
25. CONFIRM WHETHER MALFUNCTION HAS BEEN SUCCESSFULLY REPAIRED NOTE: In this operation, the engine must be cold (approximately the same level as the engine coolant temperature recorded in the freeze frame data). Connect the Techstream to the DLC3. Turn the power switch on (IG). Turn the Techstream on. Clear the DTCs. Refer to «DTC CHECK / CLEAR»(/toyota/prius-v/i-2011-2014/remont/testing-diagnostics/#engine-control-system-diagnostics-introduction__dtc-check-clear) . Turn the power switch off and wait for 30 seconds. Drive the vehicle in accordance with the driving pattern described in the Confirmation Driving Pattern. Enter the following menus: Powertrain / Engine and ECT / Utility / All Readiness. Input the DTC: P050B. Check the DTC judgment result. RESULT Result Proceed to NORMAL (DTC is not output) A ABNORMAL (DTC P050B is output) B B --> See step 27 A --> END
26. GO TO DTC CHART. Refer to «DIAGNOSTIC TROUBLE CODE CHART»(/toyota/prius-v/i-2011-2014/remont/testing-diagnostics/#engine-control-system-diagnostics-introduction__diagnostic-trouble-code-chart)
27. REPLACE ECM. Refer to «REMOVAL»(/toyota/prius-v/i-2011-2014/remont/testing-diagnostics/#engine-control-system-service-information)

The auxiliary battery supplies electricity to the ECM even when the power switch is off. This power allows the ECM to store data such as DTC history, freeze frame data and fuel trim values. If the auxiliary battery voltage falls below a minimum level, the memory is cleared and the ECM determines that there is a malfunction in the power supply circuit. The next time the engine is started, the ECM illuminates the MIL and stores the DTC.

HINT

If DTC P0560 is stored, the ECM does not store other DTCs or the data stored in the ECM may be partly cleared.

Scheme 54

1. Connect the Techstream to the DLC3.
2. Turn the power switch on (IG) and turn the Techstream on.
3. Clear the DTCs (even if no DTCs are stored, perform the clear DTC procedure). Refer to «DTC CHECK / CLEAR»(/toyota/prius-v/i-2011-2014/remont/testing-diagnostics/#engine-control-system-diagnostics-introduction__dtc-check-clear) .
4. Turn the power switch off and wait for 30 seconds.
5. Turn the power switch on (IG) and turn the Techstream on.
6. Wait 5 seconds or more.
7. Enter the following menus: Powertrain / Engine and ECT / Trouble Codes.
8. Read the pending DTCs. HINT: If a pending DTC is output, the system is malfunctioning. If a pending DTC is not output, perform the following procedure.
9. Enter the following menus: Powertrain / Engine and ECT / Utility / All Readiness.
10. Input the DTC: P0560.
11. Check the DTC judgment result. Techstream Display Description NORMAL DTC judgment completed System normal ABNORMAL DTC judgment completed System abnormal INCOMPLETE DTC judgment not completed Perform driving pattern after confirming DTC enabling conditions N/A Unable to perform DTC judgment Number of DTCs which do not fulfill DTC preconditions has reached ECU memory limit HINT: If the judgment result shows NORMAL, the system is normal. If the judgment result shows ABNORMAL, the system has a malfunction.
12. If the judgment result is INCOMPLETE or N/A and no pending DTC is output, perform a universal trip and check for permanent DTCs. Refer to «DTC CHECK / CLEAR»(/toyota/prius-v/i-2011-2014/remont/testing-diagnostics/#engine-control-system-diagnostics-introduction__dtc-check-clear) . HINT: If a permanent DTC is output, the system is malfunctioning. If no permanent DTC is output, the system is normal.

Note. After turning power switch off, waiting time may be required before disconnecting the cable from the negative (-) auxiliary battery terminal. Therefore, make sure to read the disconnecting the cable from the negative (-) auxiliary battery terminal notices before proceeding with work. Refer to PRECAUTION . Inspect the fuses for circuits related to this system before performing the following inspection procedure.

HINT

Read freeze frame data using the Techstream. The ECM records vehicle and driving condition information as freeze frame data the moment a DTC is stored. When troubleshooting, freeze frame data can be helpful in determining whether the vehicle was running or stopped, whether the engine was warmed up or not, whether the air fuel ratio was lean or rich, as well as other data recorded at the time of a malfunction.

1. CHECK HARNESS AND CONNECTOR (ECM - AUXILIARY BATTERY) Disconnect the negative (-) auxiliary battery terminal. Disconnect the positive (+) auxiliary battery terminal. Disconnect the ECM connector. Measure the resistance according to the value(s) in the table below. Standard Resistance Tester Connection Condition Specified Condition Positive (+) auxiliary battery terminal - A57-20 (BATT) Always Below 1 ohms NG --> REPAIR OR REPLACE HARNESS OR CONNECTOR OK: Go to next step
2. INSPECT AUXILIARY BATTERY Check that the auxiliary battery is not depleted. Refer to «ON-VEHICLE INSPECTION - Step 1»(/toyota/prius-v/i-2011-2014/remont/charging-system/#charging-system-inspection) . OK Auxiliary battery is not depleted. NG --> REPLACE AUXILIARY BATTERY OK: Go to next step
3. CHECK AUXILIARY BATTERY TERMINAL Check that the auxiliary battery terminals are not loose or corroded. OK Auxiliary battery terminals are not loose or corroded. NG --> REPAIR OR REPLACE AUXILIARY BATTERY TERMINAL OK: Go to next step
4. CHECK WHETHER DTC OUTPUT RECURS (DTC P0560) Connect the Techstream to the DLC3. Turn the power switch on (IG). Turn the Techstream on. Clear the DTCs. Refer to «DTC CHECK / CLEAR»(/toyota/prius-v/i-2011-2014/remont/testing-diagnostics/#engine-control-system-diagnostics-introduction__dtc-check-clear) . Turn the power switch off and turn the Techstream off. Turn the power switch on (IG) and turn the Techstream on. Wait for 5 seconds or more. Enter the following menus: Powertrain / Engine and ECT / Trouble Codes. Read the DTCs. RESULT Result Proceed to DTC P0560 is output A DTC is not output B B --> See step 5 A --> See step 6
5. CHECK FOR INTERMITTENT PROBLEMS. Refer to «CHECK FOR INTERMITTENT PROBLEMS»(/toyota/prius-v/i-2011-2014/remont/testing-diagnostics/#engine-control-system-diagnostics-introduction__check-for-intermittent-problems)
6. REPLACE ECM. Refer to «REMOVAL»(/toyota/prius-v/i-2011-2014/remont/testing-diagnostics/#engine-control-system-service-information)

The ECM continuously monitors its internal memory status. This self-check ensures that the ECM is functioning properly. It is diagnosed by internal "mirroring" of the main CPU and sub CPU to detect Random Access Memory (RAM) errors. If outputs from these CPUs are different and deviate from the standards, the ECM will illuminate the MIL and stores the DTC immediately.

1. Connect the Techstream to the DLC3.
2. Turn the power switch on (IG) and turn the Techstream on.
3. Clear the DTCs (even if no DTCs are stored, perform the clear DTC operation). Refer to «DTC CHECK / CLEAR»(/toyota/prius-v/i-2011-2014/remont/testing-diagnostics/#engine-control-system-diagnostics-introduction__dtc-check-clear) .
4. Turn the Techstream off.
5. Turn the power switch off.
6. Disconnect the Techstream.
7. Disconnect the cable from the negative (-) auxiliary battery terminal and wait for 1 minute.
8. Connect the cable to the negative (-) auxiliary battery terminal.
9. Connect the Techstream to the DLC3.
10. Turn the power switch on (IG) and turn the Techstream on.
11. Wait 16 seconds or more.
12. Enter the following menus: Powertrain / Engine and ECT / Trouble Codes.
13. Read the pending DTCs. HINT: If a pending DTC is output, the system is malfunctioning. If a pending DTC is not output, perform the following procedure.
14. Enter the following menus: Powertrain / Engine and ECT / Utility / All Readiness.
15. Input the DTC: P0604.
16. Check the DTC judgment result. Techstream Display Description NORMAL DTC judgment completed System normal ABNORMAL DTC judgment completed System abnormal INCOMPLETE DTC judgment not completed Perform driving pattern after confirming DTC enabling conditions N/A Unable to perform DTC judgment Number of DTCs which do not fulfill DTC preconditions has reached ECU memory limit HINT: If the judgment result shows NORMAL, the system is normal. If the judgment result shows ABNORMAL, the system has a malfunction.
17. If the judgment result is INCOMPLETE or N/A and no pending DTC is output, perform a universal trip and check for permanent DTCs. Refer to «DTC CHECK / CLEAR»(/toyota/prius-v/i-2011-2014/remont/testing-diagnostics/#engine-control-system-diagnostics-introduction__dtc-check-clear) . HINT: If a permanent DTC is output, the system is malfunctioning. If no permanent DTC is output, the system is normal.

Note. After turning power switch off, waiting time may be required before disconnecting the cable from the negative (-) auxiliary battery terminal. Therefore, make sure to read the disconnecting the cable from the negative (-) auxiliary battery terminal notices before proceeding with work. Refer to PRECAUTION

HINT

Read freeze frame data using the Techstream. The ECM records vehicle and driving condition information as freeze frame data the moment a DTC is stored. When troubleshooting, freeze frame data can be helpful in determining whether the vehicle was running or stopped, whether the engine was warmed up or not, whether the air fuel ratio was lean or rich, as well as other data recorded at the time of a malfunction.

1. READ OUTPUT DTC (DTC P0604) Connect the Techstream to the DLC3. Turn the power switch on (IG). Turn the Techstream on. Clear the DTCs. Refer to «DTC CHECK / CLEAR»(/toyota/prius-v/i-2011-2014/remont/testing-diagnostics/#engine-control-system-diagnostics-introduction__dtc-check-clear) . Turn the power switch off and turn the Techstream off. Disconnect the Techstream. Disconnect the cable from the negative (-) auxiliary battery terminal and wait for 1 minute. Connect the cable to the negative (-) auxiliary battery terminal. Connect the Techstream to the DLC3. Turn the power switch on (IG). Turn the Techstream on. Wait 16 seconds or more. Enter the following menus: Powertrain / Engine and ECT / Trouble Codes. Read the DTCs. RESULT Result Proceed to DTC is not output A DTC P0604 is output B B --> See step 3 A --> See step 2
2. CHECK FOR INTERMITTENT PROBLEMS. Refer to «CHECK FOR INTERMITTENT PROBLEMS»(/toyota/prius-v/i-2011-2014/remont/testing-diagnostics/#engine-control-system-diagnostics-introduction__check-for-intermittent-problems)
3. REPLACE ECM. Refer to «REMOVAL»(/toyota/prius-v/i-2011-2014/remont/testing-diagnostics/#engine-control-system-service-information)

The ECM continuously monitors its main and sub CPUs. This self-check ensures that the ECM is functioning properly. If outputs from the CPUs are different and deviate from the standards, the ECM will illuminate the MIL and stores the DTC immediately.

1. Connect the Techstream to the DLC3.
2. Turn the power switch on (IG) and turn the Techstream on.
3. Clear the DTCs (even if no DTCs are stored, perform the clear DTC operation). Refer to «DTC CHECK / CLEAR»(/toyota/prius-v/i-2011-2014/remont/testing-diagnostics/#engine-control-system-diagnostics-introduction__dtc-check-clear) .
4. Turn the Techstream off.
5. Turn the power switch off.
6. Disconnect the Techstream.
7. Disconnect the cable from the negative (-) auxiliary battery terminal and wait for 1 minute.
8. Connect the cable to the negative (-) auxiliary battery terminal.
9. Connect the Techstream to the DLC3.
10. Turn the power switch on (IG) and turn the Techstream on.
11. Wait 16 seconds or more.
12. Enter the following menus: Powertrain / Engine and ECT / Trouble Codes.
13. Read the pending DTCs. HINT: If a pending DTC is output, the system is malfunctioning. If a pending DTC is not output, perform the following procedure.
14. Enter the following menus: Powertrain / Engine and ECT / Utility / All Readiness.
15. Input the DTC: P0606.
16. Check the DTC judgment result. Techstream Display Description NORMAL DTC judgment completed System normal ABNORMAL DTC judgment completed System abnormal INCOMPLETE DTC judgment not completed Perform driving pattern after confirming DTC enabling conditions N/A Unable to perform DTC judgment Number of DTCs which do not fulfill DTC preconditions has reached ECU memory limit HINT: If the judgment result shows NORMAL, the system is normal. If the judgment result shows ABNORMAL, the system has a malfunction.
17. If the judgment result is INCOMPLETE or N/A and no pending DTC is output, perform a universal trip and check for permanent DTCs. Refer to «DTC CHECK / CLEAR»(/toyota/prius-v/i-2011-2014/remont/testing-diagnostics/#engine-control-system-diagnostics-introduction__dtc-check-clear) . HINT: If a permanent DTC is output, the system is malfunctioning. If no permanent DTC is output, the system is normal.

Note. After turning power switch off, waiting time may be required before disconnecting the cable from the negative (-) auxiliary battery terminal. Therefore, make sure to read the disconnecting the cable from the negative (-) auxiliary battery terminal notices before proceeding with work. Refer to PRECAUTION

HINT

Read freeze frame data using the Techstream. The ECM records vehicle and driving condition information as freeze frame data the moment a DTC is stored. When troubleshooting, freeze frame data can help determine if the vehicle was moving or stationary, if the engine was warmed up or not, if the air fuel ratio was lean or rich, and other data from the time the malfunction occurred.

1. READ OUTPUT DTC (DTC P0606) Connect the Techstream to the DLC3. Turn the power switch on (IG). Turn the Techstream on. Clear the DTCs. Refer to «DTC CHECK / CLEAR»(/toyota/prius-v/i-2011-2014/remont/testing-diagnostics/#engine-control-system-diagnostics-introduction__dtc-check-clear) . Turn the Techstream off. Turn the power switch off. Disconnect the Techstream. Disconnect the cable from the negative (-) auxiliary battery terminal and wait for 1 minute. Connect the cable to the negative (-) auxiliary battery terminal. Connect the Techstream to the DLC3. Turn the power switch on (IG). Wait 16 seconds or more. Turn the Techstream on. Enter the following menus: Powertrain / Engine and ECT / Trouble Codes. Read the DTCs. RESULT Result Proceed to DTC is not output A DTC P0606 is output B B --> See step 3 A --> See step 2
2. CHECK FOR INTERMITTENT PROBLEMS. Refer to «CHECK FOR INTERMITTENT PROBLEMS»(/toyota/prius-v/i-2011-2014/remont/testing-diagnostics/#engine-control-system-diagnostics-introduction__check-for-intermittent-problems)
3. REPLACE ECM. Refer to «REMOVAL»(/toyota/prius-v/i-2011-2014/remont/testing-diagnostics/#engine-control-system-service-information)

The ECM continuously monitors its internal processors (CPUs) and heated oxygen sensor transistors. This self-check ensures that the ECM is functioning properly.

Scheme 55

1. Stop the engine for 30 minutes or more [A].
2. Connect the Techstream to the DLC3.
3. Turn the power switch on (IG) and turn the Techstream on.
4. Clear the DTCs (even if no DTCs are stored, perform the clear DTC procedure). Refer to «DTC CHECK / CLEAR»(/toyota/prius-v/i-2011-2014/remont/testing-diagnostics/#engine-control-system-diagnostics-introduction__dtc-check-clear) .
5. Turn the power switch off and wait for 30 seconds.
6. Turn the power switch on (IG) and turn the Techstream on [B].
7. Put the engine in inspection mode (maintenance mode). Refer to «INSPECTION MODE PROCEDURE»(/toyota/prius-v/i-2011-2014/remont/hoistjack/#introduction) .
8. Start the engine, and wait 2 minutes [C].
9. Warm up the engine until the engine coolant temperature is 75°C (167°F) or higher [D].
10. Idle the engine for 1 minute [E].
11. Accelerate the vehicle to 80 km/h (50 mph) and stop the vehicle [F]. WARNING: When performing the confirmation driving pattern, obey all speed limits and traffic laws.
12. Drive the vehicle at 56 to 80 km/h (35 to 50 mph) for 5 minutes or more [G]. WARNING: When performing the confirmation driving pattern, obey all speed limits and traffic laws.
13. Enter the following menus: Powertrain / Engine and ECT / Trouble Codes [H].
14. Read the pending DTCs. HINT: If a pending DTC is output, the system is malfunctioning. If a pending DTC is not output, perform the following procedure.
15. Enter the following menus: Powertrain / Engine and ECT / Utility / All Readiness.
16. Input the DTC: P0607, P0136, P0137 or P0138.
17. Check the DTC judgment result. Techstream Display Description NORMAL DTC judgment completed System normal ABNORMAL DTC judgment completed System abnormal INCOMPLETE DTC judgment not completed Perform driving pattern after confirming DTC enabling conditions N/A Unable to perform DTC judgment Number of DTCs which do not fulfill DTC preconditions has reached ECU memory limit HINT: If the judgment result shows NORMAL, the system is normal. If the judgment result shows ABNORMAL, the system has a malfunction. If the judgment result shows INCOMPLETE or N/A, perform steps [D] through [G].
18. If no pending DTC is output, perform a universal trip and check for permanent DTCs. Refer to «DTC CHECK / CLEAR»(/toyota/prius-v/i-2011-2014/remont/testing-diagnostics/#engine-control-system-diagnostics-introduction__dtc-check-clear) . HINT: If a permanent DTC is output, the system is malfunctioning. If no permanent DTC is output, the system is normal.

HINT

Read freeze frame data using the Techstream. The ECM records vehicle and driving condition information as freeze frame data the moment a DTC is stored. When troubleshooting, freeze frame data can help determine if the vehicle was moving or stationary, if the engine was warmed up or not, if the air fuel ratio was lean or rich, and other data from the time the malfunction occurred.

Scheme 56

1. CHECK ANY OTHER DTCS OUTPUT (IN ADDITION TO P0607) Connect the Techstream to the DLC3. Turn the power switch on (IG). Turn the Techstream on. Enter the following menus: Powertrain / Engine and ECT / Trouble Codes. Read the DTCs. RESULT Result Proceed to DTC P0607 and P0136, P0137 or P0138 are output A DTC P0607 is output B B --> See step 3 A: Go to next step
2. INSPECT DTC (P0136, P0137 OR P0138) Inspect the P0136, P0137 or P0138 flowchart. HINT: If P0136 is output, troubleshoot for that DTC first. Refer to «INSPECTION PROCEDURE»(/toyota/prius-v/i-2011-2014/remont/testing-diagnostics/#engine-control-system-diagnostic-codes) . Then proceed to "Inspect ECM". If P0137 is output, troubleshoot for that DTC first. Refer to «INSPECTION PROCEDURE»(/toyota/prius-v/i-2011-2014/remont/testing-diagnostics/#engine-control-system-diagnostic-codes) . Then proceed to "Inspect ECM". If P0138 is output, troubleshoot for that DTC first. Refer to «INSPECTION PROCEDURE»(/toyota/prius-v/i-2011-2014/remont/testing-diagnostics/#engine-control-system-diagnostic-codes) . Then proceed to "Inspect ECM". If DTC P0607 and P0136, P0137 or P0138 are output, the output voltage of the heated oxygen sensor may remain close to 0 V or become high (around 1 V or higher). NEXT --> See step 6
3. CHECK FOR EXHAUST GAS LEAK Connect the Techstream to the DLC3. Turn the power switch on (IG). Turn the Techstream on. Put the engine in inspection mode (maintenance mode). Refer to «INSPECTION MODE PROCEDURE»(/toyota/prius-v/i-2011-2014/remont/hoistjack/#introduction) . Start the engine. Allow the engine to idle and rev the engine. Check for exhaust gas leaks around the heated oxygen sensor. If any exhaust gas leaks are present, repair them and proceed to "Perform Confirmation Driving Pattern". If no exhaust gas leaks are present, proceed to "Perform Confirmation Driving Pattern". HINT: If no exhaust gas leaks are present, a malfunction in the heated oxygen sensor circuit is suspected. If any exhaust gas leaks are present around the heated oxygen sensor, noise appears in the output voltage of the heated oxygen sensor. NEXT: Go to next step
4. PERFORM CONFIRMATION DRIVING PATTERN Clear the DTCs. Refer to «DTC CHECK / CLEAR»(/toyota/prius-v/i-2011-2014/remont/testing-diagnostics/#engine-control-system-diagnostics-introduction__dtc-check-clear) . Connect the Techstream to the DLC3. Turn the power switch on (IG) and turn the Techstream on. Put the engine in inspection mode (maintenance mode). Refer to «INSPECTION MODE PROCEDURE»(/toyota/prius-v/i-2011-2014/remont/hoistjack/#introduction) . Start the engine. Warm up the engine until the engine coolant temperature becomes 75°C (167°F) or higher. Perform the driving pattern. Accelerate the vehicle to 80 km/h (50 mph) and stop the vehicle. Drive the vehicle between 60 and 80 km/h (37 and 50 mph) for 5 minutes. Enter the following menus: Powertrain / Engine and ECT / Trouble Codes. Read the DTCs. RESULT Result Proceed to DTC P0607 and P0136, P0137 or P0138 are output A Only P0607 is output B DTC is not output C B --> See step 7 C --> See step 6 A: Go to next step
5. INSPECT DTC (P0136, P0137 OR P0138) Inspect the P0136, P0137 or P0138 flowchart. HINT: If P0136 is output, troubleshoot for that DTC first. Refer to «INSPECTION PROCEDURE»(/toyota/prius-v/i-2011-2014/remont/testing-diagnostics/#engine-control-system-diagnostic-codes) . Then proceed to "Inspect ECM". If P0137 is output, troubleshoot for that DTC first. Refer to «INSPECTION PROCEDURE»(/toyota/prius-v/i-2011-2014/remont/testing-diagnostics/#engine-control-system-diagnostic-codes) . Then proceed to "Inspect ECM". If P0138 is output, troubleshoot for that DTC first. Refer to «INSPECTION PROCEDURE»(/toyota/prius-v/i-2011-2014/remont/testing-diagnostics/#engine-control-system-diagnostic-codes) . Then proceed to "Inspect ECM". If DTC P0607 and P0136, P0137 or P0138 are output, the output voltage of the heated oxygen sensor may remain close to 0 V or become high (around 1 V or higher). NEXT: Go to next step
6. INSPECT ECM Clear the DTCs. Refer to «DTC CHECK / CLEAR»(/toyota/prius-v/i-2011-2014/remont/testing-diagnostics/#engine-control-system-diagnostics-introduction__dtc-check-clear) . Stop the engine and wait for 30 minutes. Connect the Techstream to the DLC3. Turn the power switch on (IG) and turn the Techstream on. Put the engine in inspection mode (maintenance mode). Refer to «INSPECTION MODE PROCEDURE»(/toyota/prius-v/i-2011-2014/remont/hoistjack/#introduction) . Start the engine and allow it to idle for 2 minutes. Enter the following menus: Powertrain / Engine and ECT / Trouble Codes. Check the DTCs. RESULT Result Proceed to DTC is not output A DTC P0607 is output B B --> See step 7 A --> END
7. REPLACE ECM. Refer to «REMOVAL»(/toyota/prius-v/i-2011-2014/remont/testing-diagnostics/#engine-control-system-service-information)

The main CPU and sub CPU of the ECM communicate with each other. The main CPU monitors the communications and WDC pulses from the sub CPU. When the signal malfunctions below deviate, the DTC is stored.

1. Connect the Techstream to the DLC3.
2. Turn the power switch on (IG) and turn the Techstream on.
3. Clear the DTCs (even if no DTCs are stored, perform the clear DTC operation). Refer to «DTC CHECK / CLEAR»(/toyota/prius-v/i-2011-2014/remont/testing-diagnostics/#engine-control-system-diagnostics-introduction__dtc-check-clear) .
4. Turn the Techstream off.
5. Turn the power switch off.
6. Disconnect the Techstream.
7. Disconnect the cable from the negative (-) auxiliary battery terminal and wait for 1 minute.
8. Connect the cable to the negative (-) auxiliary battery terminal.
9. Connect the Techstream to the DLC3.
10. Turn the power switch on (IG) and turn the Techstream on.
11. Wait 16 seconds or more.
12. Enter the following menus: Powertrain / Engine and ECT / Trouble Codes.
13. Read the pending DTCs. HINT: If a pending DTC is output, the system is malfunctioning. If a pending DTC is not output, perform the following procedure.
14. Enter the following menus: Powertrain / Engine and ECT / Utility / All Readiness.
15. Input the DTC: P060A.
16. Check the DTC judgment result. Techstream Display Description NORMAL DTC judgment completed System normal ABNORMAL DTC judgment completed System abnormal INCOMPLETE DTC judgment not completed Perform driving pattern after confirming DTC enabling conditions N/A Unable to perform DTC judgment Number of DTCs which do not fulfill DTC preconditions has reached ECU memory limit HINT: If the judgment result shows NORMAL, the system is normal. If the judgment result shows ABNORMAL, the system has a malfunction.
17. If the judgment result is INCOMPLETE or N/A and no pending DTC is output, perform a universal trip and check for permanent DTCs. Refer to «DTC CHECK / CLEAR»(/toyota/prius-v/i-2011-2014/remont/testing-diagnostics/#engine-control-system-diagnostics-introduction__dtc-check-clear) . HINT: If a permanent DTC is output, the system is malfunctioning. If no permanent DTC is output, the system is normal.

Note. After turning power switch off, waiting time may be required before disconnecting the cable from the negative (-) auxiliary battery terminal. Therefore, make sure to read the disconnecting the cable from the negative (-) auxiliary battery terminal notices before proceeding with work. Refer to PRECAUTION

HINT

Read freeze frame data using the Techstream. The ECM records vehicle and driving condition information as freeze frame data the moment a DTC is stored. When troubleshooting, freeze frame data can help determine if the vehicle was moving or stationary, if the engine was warmed up or not, if the air fuel ratio was lean or rich, and other data from the time the malfunction occurred.

1. READ OUTPUT DTC (DTC P060A) Connect the Techstream to the DLC3. Turn the power switch on (IG). Turn the Techstream on. Clear the DTCs. Refer to «DTC CHECK / CLEAR»(/toyota/prius-v/i-2011-2014/remont/testing-diagnostics/#engine-control-system-diagnostics-introduction__dtc-check-clear) . Turn the power switch off. Disconnect the Techstream. Disconnect the cable from the negative (-) auxiliary battery terminal and wait for 1 minute. Connect the cable to the negative (-) auxiliary battery terminal. Connect the Techstream to the DLC3. Turn the power switch on (IG). Turn the Techstream on. Wait 16 seconds or more. Enter the following menus: Powertrain / Engine and ECT / Trouble Codes. Read the DTCs. RESULT Result Proceed to DTC is not output A DTC P060A is output B B --> See step 3 A --> See step 2
2. CHECK FOR INTERMITTENT PROBLEMS. Refer to «CHECK FOR INTERMITTENT PROBLEMS»(/toyota/prius-v/i-2011-2014/remont/testing-diagnostics/#engine-control-system-diagnostics-introduction__check-for-intermittent-problems)
3. REPLACE ECM. Refer to «REMOVAL»(/toyota/prius-v/i-2011-2014/remont/testing-diagnostics/#engine-control-system-service-information)

This DTC is output when a communication error occurs in the ECM.

CASE 1 AND CASE 2

CASE 3

CASE 1

CASE 2

CASE 3

1. Connect the Techstream to the DLC3.
2. Turn the power switch on (IG) and turn the Techstream on.
3. Clear the DTCs (even if no DTCs are stored, perform the clear DTC operation). Refer to «DTC CHECK / CLEAR»(/toyota/prius-v/i-2011-2014/remont/testing-diagnostics/#engine-control-system-diagnostics-introduction__dtc-check-clear) .
4. Turn the Techstream off.
5. Turn the power switch off.
6. Disconnect the Techstream.
7. Disconnect the cable from the negative (-) auxiliary battery terminal and wait for 1 minute.
8. Connect the cable to the negative (-) auxiliary battery terminal.
9. Connect the Techstream to the DLC3.
10. Turn the power switch on (IG) and turn the Techstream on.
11. Wait 16 seconds or more.
12. Enter the following menus: Powertrain / Engine and ECT / Trouble Codes.
13. Read the pending DTCs. HINT: If a pending DTC is output, the system is malfunctioning. If a pending DTC is not output, perform the following procedure.
14. Enter the following menus: Powertrain / Engine and ECT / Utility / All Readiness.
15. Input the DTC: P060B.
16. Check the DTC judgment result. Techstream Display Description NORMAL DTC judgment completed System normal ABNORMAL DTC judgment completed System abnormal INCOMPLETE DTC judgment not completed Perform driving pattern after confirming DTC enabling conditions N/A Unable to perform DTC judgment Number of DTCs which do not fulfill DTC preconditions has reached ECU memory limit HINT: If the judgment result shows NORMAL, the system is normal. If the judgment result shows ABNORMAL, the system has a malfunction.
17. If the judgment result is INCOMPLETE or N/A and no pending DTC is output, perform a universal trip and check for permanent DTCs. Refer to «DTC CHECK / CLEAR»(/toyota/prius-v/i-2011-2014/remont/testing-diagnostics/#engine-control-system-diagnostics-introduction__dtc-check-clear) . HINT: If a permanent DTC is output, the system is malfunctioning. If no permanent DTC is output, the system is normal.

Note. After turning power switch off, waiting time may be required before disconnecting the cable from the negative (-) auxiliary battery terminal. Therefore, make sure to read the disconnecting the cable from the negative (-) auxiliary battery terminal notices before proceeding with work. Refer to PRECAUTION

HINT

Read freeze frame data using the Techstream. The ECM records vehicle and driving condition information as freeze frame data the moment a DTC is stored. When troubleshooting, freeze frame data can help determine if the vehicle was moving or stationary, if the engine was warmed up or not, if the air fuel ratio was lean or rich, and other data from the time the malfunction occurred.

1. READ OUTPUT DTC (DTC P060B) Connect the Techstream to the DLC3. Turn the power switch on (IG). Turn the Techstream on. Clear the DTCs. Refer to «DTC CHECK / CLEAR»(/toyota/prius-v/i-2011-2014/remont/testing-diagnostics/#engine-control-system-diagnostics-introduction__dtc-check-clear) . Turn the power switch off. Turn the Techstream off. Disconnect the Techstream. Disconnect the cable from the negative (-) auxiliary battery terminal and wait for 1 minute. Connect the cable to the negative (-) auxiliary battery terminal. Connect the Techstream to the DLC3. Turn the power switch on (IG). Turn the Techstream on. Wait 16 seconds or more. Enter the following menus: Powertrain / Engine and ECT / Trouble Codes. Read the DTCs. RESULT Result Proceed to DTC is not output A DTC P060B is output B DTC P060B and P0327 or P0328 are output C B --> See step 3 C --> See step 4 A --> See step 2
2. CHECK FOR INTERMITTENT PROBLEMS. Refer to «CHECK FOR INTERMITTENT PROBLEMS»(/toyota/prius-v/i-2011-2014/remont/testing-diagnostics/#engine-control-system-diagnostics-introduction__check-for-intermittent-problems)
3. REPLACE ECM. Refer to «REMOVAL»(/toyota/prius-v/i-2011-2014/remont/testing-diagnostics/#engine-control-system-service-information)
4. GO TO DTC P0327 AND P0328. Refer to «DTC P0327: Knock Sensor 1 Circuit Low Input (Bank 1 or Single Sensor); DTC P0328: Knock Sensor 1 Circuit High Input (Bank 1 or Single Sensor)»(/toyota/prius-v/i-2011-2014/remont/testing-diagnostics/#engine-control-system-diagnostic-codes)

The ECM monitors the input signals of the No. 1 throttle position sensor. When the ECM monitors the input signal of the No. 1 throttle position sensor, if the input signal and control signal deviate, the DTC is stored.

CASE 1

CASE 2

CASE 1

CASE 2

1. Connect the Techstream to the DLC3.
2. Turn the power switch on (IG) and turn the Techstream on.
3. Clear the DTCs (even if no DTCs are stored, perform the clear DTC operation). Refer to «DTC CHECK / CLEAR»(/toyota/prius-v/i-2011-2014/remont/testing-diagnostics/#engine-control-system-diagnostics-introduction__dtc-check-clear) .
4. Turn the Techstream off.
5. Turn the power switch off.
6. Disconnect the Techstream.
7. Disconnect the cable from the negative (-) auxiliary battery terminal and wait for 1 minute.
8. Connect the cable to the negative (-) auxiliary battery terminal.
9. Connect the Techstream to the DLC3.
10. Turn the power switch on (IG) and turn the Techstream on.
11. Wait 16 seconds or more.
12. Enter the following menus: Powertrain / Engine and ECT / Trouble Codes.
13. Read the pending DTCs. HINT: If a pending DTC is output, the system is malfunctioning. If a pending DTC is not output, perform the following procedure.
14. Enter the following menus: Powertrain / Engine and ECT / Utility / All Readiness.
15. Input the DTC: P060E.
16. Check the DTC judgment result. Techstream Display Description NORMAL DTC judgment completed System normal ABNORMAL DTC judgment completed System abnormal INCOMPLETE DTC judgment not completed Perform driving pattern after confirming DTC enabling conditions N/A Unable to perform DTC judgment Number of DTCs which do not fulfill DTC preconditions has reached ECU memory limit HINT: If the judgment result shows NORMAL, the system is normal. If the judgment result shows ABNORMAL, the system has a malfunction.
17. If the judgment result is INCOMPLETE or N/A and no pending DTC is output, perform a universal trip and check for permanent DTCs. Refer to «DTC CHECK / CLEAR»(/toyota/prius-v/i-2011-2014/remont/testing-diagnostics/#engine-control-system-diagnostics-introduction__dtc-check-clear) . HINT: If a permanent DTC is output, the system is malfunctioning. If no permanent DTC is output, the system is normal.

Note. After turning power switch off, waiting time may be required before disconnecting the cable from the negative (-) auxiliary battery terminal. Therefore, make sure to read the disconnecting the cable from the negative (-) auxiliary battery terminal notices before proceeding with work. Refer to PRECAUTION

HINT

Read freeze frame data using the Techstream. The ECM records vehicle and driving condition information as freeze frame data the moment a DTC is stored. When troubleshooting, freeze frame data can help determine if the vehicle was moving or stationary, if the engine was warmed up or not, if the air fuel ratio was lean or rich, and other data from the time the malfunction occurred.

1. READ OUTPUT DTC (DTC P060E) Connect the Techstream to the DLC3. Turn the power switch on (IG). Turn the Techstream on. Clear the DTCs. Refer to «DTC CHECK / CLEAR»(/toyota/prius-v/i-2011-2014/remont/testing-diagnostics/#engine-control-system-diagnostics-introduction__dtc-check-clear) . Turn the power switch off. Turn the Techstream off. Disconnect the Techstream. Disconnect the cable from the negative (-) auxiliary battery terminal and wait for 1 minute. Connect the cable to the negative (-) auxiliary battery terminal. Connect the Techstream to the DLC3. Turn the power switch on (IG). Turn the Techstream on. Wait 16 seconds or more. Enter the following menus: Powertrain / Engine and ECT / Trouble Codes. Read the DTCs. RESULT Result Proceed to DTC is not output A DTC P060E is output B B --> See step 3 A --> See step 2
2. CHECK FOR INTERMITTENT PROBLEMS. Refer to «CHECK FOR INTERMITTENT PROBLEMS»(/toyota/prius-v/i-2011-2014/remont/testing-diagnostics/#engine-control-system-diagnostics-introduction__check-for-intermittent-problems)
3. REPLACE ECM. Refer to «REMOVAL»(/toyota/prius-v/i-2011-2014/remont/testing-diagnostics/#engine-control-system-service-information)

The ECM monitors its internal operation and stores this DTC when it detects an internal malfunction.

The ECM monitors its internal operation. If the internal operation is malfunctioning, the ECM illuminates the MIL and stores a DTC.

1. Connect the Techstream to the DLC3.
2. Turn the power switch on (IG) and turn the Techstream on.
3. Clear the DTCs (even if no DTCs are stored, perform the clear DTC operation). Refer to «DTC CHECK / CLEAR»(/toyota/prius-v/i-2011-2014/remont/testing-diagnostics/#engine-control-system-diagnostics-introduction__dtc-check-clear) .
4. Turn the power switch off and wait for at least 30 seconds.
5. Turn the power switch on (IG) and turn the Techstream on.
6. Put the engine in inspection mode (maintenance mode). Refer to «INSPECTION MODE PROCEDURE»(/toyota/prius-v/i-2011-2014/remont/hoistjack/#introduction) .
7. Start the engine and wait 30 seconds or more.
8. Enter the following menus: Powertrain / Engine and ECT / Trouble Codes.
9. Read the pending DTCs. HINT: If a pending DTC is output, the system is malfunctioning. If a pending DTC is not output, perform the following procedure.
10. Enter the following menus: Powertrain / Engine and ECT / Utility / All Readiness.
11. Input the DTC: P062F.
12. Check the DTC judgment result. Techstream Display Description NORMAL DTC judgment completed System normal ABNORMAL DTC judgment completed System abnormal INCOMPLETE DTC judgment not completed Perform driving pattern after confirming DTC enabling conditions N/A Unable to perform DTC judgment Number of DTCs which do not fulfill DTC preconditions has reached ECU memory limit HINT: If the judgment result shows NORMAL, the system is normal. If the judgment result shows ABNORMAL, the system has a malfunction.
13. If the judgment result is INCOMPLETE or N/A and no pending DTC is output, perform a universal trip and check for permanent DTCs. Refer to «DTC CHECK / CLEAR»(/toyota/prius-v/i-2011-2014/remont/testing-diagnostics/#engine-control-system-diagnostics-introduction__dtc-check-clear) . HINT: If a permanent DTC is output, the system is malfunctioning. If no permanent DTC is output, the system is normal.

Note. There is a possibility that the DTC P062F is issued from the ECUs of the ECM and power management control ECU. Use Techstream to conduct a health check to confirm which ECU the DTC is issued from and then inspect the related system. After turning power switch off, waiting time may be required before disconnecting the cable from the negative (-) auxiliary battery terminal. Therefore, make sure to read the disconnecting the cable from the negative (-) auxiliary battery terminal notices before proceeding with work. Refer to PRECAUTION

HINT

Read freeze frame data using the Techstream. The ECM records vehicle and driving condition information as freeze frame data the moment a DTC is stored. When troubleshooting, freeze frame data can help determine if the vehicle was moving or stationary, if the engine was warmed up or not, if the air fuel ratio was lean or rich, and other data from the time the malfunction occurred.

1. READ OUTPUT DTC (DTC P062F) Connect the Techstream to the DLC3. Turn the power switch on (IG). Turn the Techstream on. Clear the DTCs. Refer to «DTC CHECK / CLEAR»(/toyota/prius-v/i-2011-2014/remont/testing-diagnostics/#engine-control-system-diagnostics-introduction__dtc-check-clear) . Turn the power switch off. Turn the Techstream off. Disconnect the Techstream. Disconnect the cable from the negative (-) auxiliary battery terminal and wait for 1 minute. Connect the cable to the negative (-) auxiliary battery terminal. Connect the Techstream to the DLC3. Turn the power switch on (IG). Turn the Techstream on. Put the engine in inspection mode (maintenance mode). Refer to «INSPECTION MODE PROCEDURE»(/toyota/prius-v/i-2011-2014/remont/hoistjack/#introduction) . Start the engine and wait 10 seconds or more. Enter the following menus: Powertrain / Engine and ECT / Trouble Codes. Read the DTCs. RESULT Result Proceed to DTC is not output A DTC P062F is output B B --> See step 2 A --> See step 3
2. REPLACE ECM. Refer to «REMOVAL»(/toyota/prius-v/i-2011-2014/remont/testing-diagnostics/#engine-control-system-service-information)
3. CHECK FOR INTERMITTENT PROBLEMS. Refer to «CHECK FOR INTERMITTENT PROBLEMS»(/toyota/prius-v/i-2011-2014/remont/testing-diagnostics/#engine-control-system-diagnostics-introduction__check-for-intermittent-problems)

DTC P0630 is stored when the VIN is not stored in the ECM or the input VIN is not accurate. Input the VIN with the Techstream.

COMPONENT OPERATING RANGE

1. Connect the Techstream to the DLC3.
2. Turn the power switch on (IG) and turn the Techstream on.
3. Clear the DTCs (even if no DTCs are stored, perform the clear DTC operation). Refer to «DTC CHECK / CLEAR»(/toyota/prius-v/i-2011-2014/remont/testing-diagnostics/#engine-control-system-diagnostics-introduction__dtc-check-clear) .
4. Turn the power switch off and wait for 30 seconds.
5. Turn the power switch on (IG) and turn the Techstream on.
6. Wait 5 seconds or more.
7. Enter the following menus: Powertrain / Engine and ECT / Trouble Codes.
8. Read the pending DTCs. HINT: If a pending DTC is output, the system is malfunctioning. If a pending DTC is not output, perform the following procedure.
9. Enter the following menus: Powertrain / Engine and ECT / Utility / All Readiness.
10. Input the DTC: P0630.
11. Check the DTC judgment result. Techstream Display Description NORMAL DTC judgment completed System normal ABNORMAL DTC judgment completed System abnormal INCOMPLETE DTC judgment not completed Perform driving pattern after confirming DTC enabling conditions N/A Unable to perform DTC judgment Number of DTCs which do not fulfill DTC preconditions has reached ECU memory limit HINT: If the judgment result shows NORMAL, the system is normal. If the judgment result shows ABNORMAL, the system has a malfunction.
12. If the judgment result is INCOMPLETE or N/A and no pending DTC is output, perform a universal trip and check for permanent DTCs. Refer to «DTC CHECK / CLEAR»(/toyota/prius-v/i-2011-2014/remont/testing-diagnostics/#engine-control-system-diagnostics-introduction__dtc-check-clear) . HINT: If a permanent DTC is output, the system is malfunctioning. If no permanent DTC is output, the system is normal.

HINT

Read freeze frame data using the Techstream. The ECM records vehicle and driving condition information as freeze frame data the moment a DTC is stored. When troubleshooting, freeze frame data can help determine if the vehicle was moving or stationary, if the engine was warmed up or not, if the air fuel ratio was lean or rich, and other data from the time the malfunction occurred.

1. READ DTC OUTPUT Connect the Techstream to the DLC3. Turn the power switch on (IG). Turn the Techstream on. Enter the following menus: Powertrain / Engine and ECT / Trouble Codes. Read the DTCs. RESULT Result Proceed to DTC P0630 is output A DTC P0630 and other DTCs are output B If any DTCs other than P0630 are output, troubleshoot those DTCs first. NOTE: If P0630 is stored, the VIN must be input to the ECM using the Techstream. However, all DTCs are cleared automatically by the Techstream when inputting the VIN. If DTCs other than P0630 are output, check them first. B --> See step 3 A: Go to next step
2. INPUT VIN WITH TECHSTREAM Refer to registration. Refer to «REGISTRATION»(/toyota/prius-v/i-2011-2014/remont/testing-diagnostics/#engine-control-system-diagnostics-introduction__registration) . NEXT --> END
3. GO TO DTC CHART. Refer to «DIAGNOSTIC TROUBLE CODE CHART»(/toyota/prius-v/i-2011-2014/remont/testing-diagnostics/#engine-control-system-diagnostics-introduction__diagnostic-trouble-code-chart)

The ECM monitors the output voltage to the throttle actuator. This self-check ensures that the ECM is functioning properly. The output voltage is usually 0 V when the power switch is turned off. If the output voltage is higher than 7 V when the power switch is turned off, the ECM will illuminate the MIL and stores the DTC the next time the power switch is turned on (IG).

1. Connect the Techstream to the DLC3.
2. Turn the power switch on (IG) and turn the Techstream on.
3. Clear the DTCs (even if no DTCs are stored, perform the clear DTC operation). Refer to «DTC CHECK / CLEAR»(/toyota/prius-v/i-2011-2014/remont/testing-diagnostics/#engine-control-system-diagnostics-introduction__dtc-check-clear) .
4. Turn the Techstream off.
5. Turn the power switch off.
6. Disconnect the Techstream.
7. Disconnect the cable from the negative (-) auxiliary battery terminal and wait for 1 minute.
8. Connect the cable to the negative (-) auxiliary battery terminal.
9. Turn the power switch on (IG).
10. Wait 10 seconds or more.
11. Turn the power switch off.
12. Wait 15 seconds or more.
13. Connect the Techstream to the DLC3.
14. Turn the power switch on (IG) and turn the Techstream on.
15. Wait 5 seconds or more.
16. Enter the following menus: Powertrain / Engine and ECT / Trouble Codes.
17. Read the pending DTCs. HINT: If a pending DTC is output, the system is malfunctioning. If a pending DTC is not output, perform the following procedure.
18. Enter the following menus: Powertrain / Engine and ECT / Utility / All Readiness.
19. Input the DTC: P0657.
20. Check the DTC judgment result. Techstream Display Description NORMAL DTC judgment completed System normal ABNORMAL DTC judgment completed System abnormal INCOMPLETE DTC judgment not completed Perform driving pattern after confirming DTC enabling conditions N/A Unable to perform DTC judgment Number of DTCs which do not fulfill DTC preconditions has reached ECU memory limit HINT: If the judgment result shows NORMAL, the system is normal. If the judgment result shows ABNORMAL, the system has a malfunction.
21. If the judgment result is INCOMPLETE or N/A and no pending DTC is output, perform a universal trip and check for permanent DTCs. Refer to «DTC CHECK / CLEAR»(/toyota/prius-v/i-2011-2014/remont/testing-diagnostics/#engine-control-system-diagnostics-introduction__dtc-check-clear) . HINT: If a permanent DTC is output, the system is malfunctioning. If no permanent DTC is output, the system is normal.

Note. After turning power switch off, waiting time may be required before disconnecting the cable from the negative (-) auxiliary battery terminal. Therefore, make sure to read the disconnecting the cable from the negative (-) auxiliary battery terminal notices before proceeding with work. Refer to PRECAUTION

HINT

Read freeze frame data using the Techstream. The ECM records vehicle and driving condition information as freeze frame data the moment a DTC is stored. When troubleshooting, freeze frame data can be helpful in determining whether the vehicle was running or stopped, whether the engine was warmed up or not, whether the air fuel ratio was lean or rich, as well as other data recorded at the time of a malfunction.

1. READ OUTPUT DTC (DTC P0657) Connect the Techstream to the DLC3. Turn the power switch on (IG). Turn the Techstream on. Clear the DTCs. Refer to «DTC CHECK / CLEAR»(/toyota/prius-v/i-2011-2014/remont/testing-diagnostics/#engine-control-system-diagnostics-introduction__dtc-check-clear) . Turn the Techstream off. Turn the power switch off. Disconnect the Techstream. Disconnect the cable from the negative (-) auxiliary battery terminal and wait for 1 minute. Connect the cable to the negative (-) auxiliary battery terminal. Turn the power switch on (IG). Wait 10 seconds or more. Turn the power switch off. Wait 15 seconds or more. Connect the Techstream to the DLC3. Turn the power switch on (IG) and turn the Techstream on. Wait 5 seconds or more. Enter the following menus: Powertrain / Engine and ECT / Trouble Codes. Read the DTCs. RESULT Result Proceed to DTC is not output A DTC P0657 is output B B --> See step 3 A --> See step 2
2. CHECK FOR INTERMITTENT PROBLEMS. Refer to «CHECK FOR INTERMITTENT PROBLEMS»(/toyota/prius-v/i-2011-2014/remont/testing-diagnostics/#engine-control-system-diagnostics-introduction__check-for-intermittent-problems)
3. REPLACE ECM. Refer to «REMOVAL»(/toyota/prius-v/i-2011-2014/remont/testing-diagnostics/#engine-control-system-service-information)

HINT

*: Data List Name

This DTC is designed to detect a deviation in the output characteristics of a pressure sensor.

The pressure of the canister pressure sensor and manifold absolute pressure sensor is monitored 50 minutes after the power switch is turned off. If there is a difference in the pressures, the MIL is illuminated (2 trip detection logic).

HINT

Correct judgment may not be possible when the altitude is 13124 ft (4000 m) or more.

1. Connect the Techstream to the DLC3.
2. Turn the power switch on (IG) and turn the Techstream on.
3. Clear the DTCs (even if no DTCs are stored, perform the clear DTC procedure). Refer to «DTC CHECK / CLEAR»(/toyota/prius-v/i-2011-2014/remont/testing-diagnostics/#engine-control-system-diagnostics-introduction__dtc-check-clear) [A].
4. Put the engine in inspection mode (maintenance mode). Refer to «INSPECTION MODE PROCEDURE»(/toyota/prius-v/i-2011-2014/remont/hoistjack/#introduction) .
5. Start the engine and Idle for 10 seconds [B]
6. Turn the power switch off and wait for 30 seconds.
7. Leave the power switch off for 55 minutes [C]
8. Connect the Techstream to the DLC3.
9. Turn the power switch on (IG) and turn the Techstream on.
10. Enter the following menus: Powertrain / Engine and ECT / Trouble Codes [D].
11. Read the pending DTCs. HINT: If a pending DTC is output, the system is malfunctioning. If a pending DTC is not output, perform the following procedure.
12. Enter the following menus: Powertrain / Engine and ECT / Utility / All Readiness.
13. Input the DTC: P106A.
14. Check the DTC judgment result. Techstream Display Description NORMAL DTC judgment completed System normal ABNORMAL DTC judgment completed System abnormal INCOMPLETE DTC judgment not completed Perform driving pattern after confirming DTC enabling conditions N/A Unable to perform DTC judgment Number of DTCs which do not fulfill DTC preconditions has reached ECU's memory limit HINT: If the judgment result shows NORMAL, the system is normal. If the judgment result shows ABNORMAL, the system has a malfunction. If the judgment result shows INCOMPLETE or N/A, perform steps [B] through [D].
15. If no pending DTC is output, perform a universal trip and check for permanent DTCs. Refer to «DTC CHECK / CLEAR»(/toyota/prius-v/i-2011-2014/remont/testing-diagnostics/#engine-control-system-diagnostics-introduction__dtc-check-clear) . HINT: If a permanent DTC is output, the system is malfunctioning. If no permanent DTC is output, the system is normal.

HINT

1. Read freeze frame data using the Techstream. The ECM records vehicle and driving condition information as freeze frame data the moment a DTC is stored. When troubleshooting, freeze frame data can be helpful in determining whether the vehicle was running or stopped, whether the engine was warmed up or not, whether the air fuel ratio was lean or rich, as well as other data recorded at the time of a malfunction.
2. Refer to "Data List / Active Test" [Vapor Pressure Pump and MAP]. Refer to «DATA LIST / ACTIVE TEST»(/toyota/prius-v/i-2011-2014/remont/testing-diagnostics/#engine-control-system-diagnostics-introduction) .

1. CHECK ANY OTHER DTCS OUTPUT (IN ADDITION TO P106A) Connect the Techstream to the DLC3. Turn the power switch on (IG). Turn the Techstream on. Enter the following menus: Powertrain / Engine and ECT / Trouble Codes. Read the DTCs. RESULT Result Proceed to DTC P106A is output A DTC P106A and other DTCs are output B HINT: If any DTCs other than P106A are output, troubleshoot those DTCs first. B --> See step 6 A: Go to next step
2. READ VALUE USING TECHSTREAM (VAPOR PRESSURE PUMP AND MAP) Connect the Techstream to the DLC3. Turn the power switch on (IG). Turn the Techstream on. Enter the following menus: Powertrain / Engine and ECT / Data List / Primary / Vapor Pressure Pump and MAP. Compare the Vapor Pressure Pump and MAP data from the Data List with day's atmospheric pressure*. HINT: *: Standard atmospheric pressure is 101 kPa (758 mmHg). For every 100 m (328 ft.) increase in altitude, pressure drops by 1 kPa (7.5 mmHg). The pressure also varies due to the weather (high atmospheric pressure, low atmospheric pressure). Also, check "Atmosphere Pressure" in the Data List. If you do not know the atmospheric pressure refer to the Vapor Pressure Pump value of other vehicles in the workshop and check the difference in pressure. RESULT Result Proceed to If the Vapor Pressure Pump value differs from the atmospheric pressure by 3.5 kPa (26.254 mmHg) or higher A If the MAP value differs from the atmospheric pressure by 3.5 kPa (26.254 mmHg) or higher B B --> See step 4 A: Go to next step
3. REPLACE CANISTER PUMP MODULE Replace the canister pump module. Refer to «REMOVAL - Step 2»(/toyota/prius-v/i-2011-2014/remont/auxiliary-emission-control-systems/#emission-control-system-service-information) . NEXT --> See step 5
4. REPLACE MANIFOLD ABSOLUTE PRESSURE SENSOR Replace the manifold absolute pressure sensor. Refer to «REMOVAL»(/toyota/prius-v/i-2011-2014/remont/auxiliary-emission-control-systems/#emission-control-system-service-information) . NEXT: Go to next step
5. CONFIRM WHETHER MALFUNCTION HAS BEEN SUCCESSFULLY REPAIRED Connect the Techstream to the DLC3. Turn the power switch on (IG) and the Techstream on. Enter the following menus: Powertrain / Engine and ECT / Data List / Primary / Vapor Pressure Pump and MAP. Confirm that the difference between Vapor Pressure Pump and MAP are 3.5 kPa (26.254 mmHg) or less. NEXT --> END
6. GO TO DTC CHART. Refer to «DIAGNOSTIC TROUBLE CODE CHART»(/toyota/prius-v/i-2011-2014/remont/testing-diagnostics/#engine-control-system-diagnostics-introduction__diagnostic-trouble-code-chart)

The ECM controls the engine water pump assembly by calculating the necessary amount of coolant flow based on engine coolant temperature, engine speed and vehicle speed information. The speed of the engine water pump assembly is controlled steplessly using a duty cycle signal sent from the ECM. This optimal control enhances warm-up performance and reduces cooling losses, thus reducing the specific fuel consumption of the engine. The ECM monitors the speed of the engine water pump assembly and stores a DTC when it determines that the engine water pump assembly rotates excessively based on the fact that the actual speed is higher than the target for a certain amount of time. (However, the engine warning light will not illuminate.)

HINT

The engine coolant temperature indicator light built into the combination meter sub-assembly illuminates or blinks when the coolant temperature becomes 117°C (243°F) or higher.

HINT

1. DTC P148F may be stored if the engine has continuously run with insufficient engine coolant. If the engine coolant is sufficient and DTC P148F recur when the vehicle is brought to the workshop, confirm whether engine coolant was added after the vehicle had been driven with insufficient engine coolant.
2. Read freeze frame data using the Techstream. The ECM records vehicle and driving condition information as freeze frame data the moment a DTC is stored. When troubleshooting, freeze frame data can be helpful in determining whether the vehicle was running or stopped, whether the engine was warmed up or not, whether the air fuel ratio was lean or rich, as well as other data recorded at the time of a malfunction.

1. CHECK ANY OTHER DTCS OUTPUT (IN ADDITION TO P148F) Connect the Techstream to the DLC3. Turn the power switch on (IG). Turn the Techstream on. Enter the following menus: Powertrain / Engine and ECT / Trouble Codes. Read the DTCs. RESULT Result Proceed to DTC P148F is output A DTC P148F and other DTCs are output B HINT: If any DTCs other than P148F are output, troubleshoot those DTCs first. B --> See step 11 A: Go to next step
2. CHECK RADIATOR RESERVOIR TANK ASSEMBLY (ENGINE COOLANT LEVEL) Check that the engine coolant level is between the FULL and LOW lines. Refer to «ON-VEHICLE INSPECTION - Step 2»(/toyota/prius-v/i-2011-2014/remont/cooling-system-mechanical/#engine-cooling-system-inspection) . RESULT Result Proceed to Engine coolant level is below the LOW line A Engine coolant level is above the LOW line B B --> See step 6 A: Go to next step
3. CHECK FOR ENGINE COOLANT LEAKS Check the areas around the engine and heater for engine coolant leaks. Refer to «ON-VEHICLE INSPECTION - Step 1»(/toyota/prius-v/i-2011-2014/remont/cooling-system-mechanical/#engine-cooling-system-inspection) . OK No leaks. HINT: If the engine oil is cloudy during the engine oil level gauge check, it means that engine coolant has entered the engine lubrication system. NG --> See step 5 OK: Go to next step
4. ADD ENGINE COOLANT Fill the reservoir tank up to the FULL line with engine coolant. NOTE: Make sure not to add engine coolant when the engine is hot. NEXT --> See step 6
5. REPAIR OR REPLACE MALFUNCTIONING PARTS, COMPONENT AND AREA Repair any engine coolant leaks. HINT: Add engine coolant and perform air bleeding after repair. Refer to «REPLACEMENT»(/toyota/prius-v/i-2011-2014/remont/cooling-fan/#engine-cooling-system-service-information) . NEXT: Go to next step
6. CLEAR DTC (DTC P148F) Connect the Techstream to the DLC3. Turn the power switch on (IG). Turn the Techstream on. Clear the DTC. Refer to «DTC CHECK / CLEAR»(/toyota/prius-v/i-2011-2014/remont/testing-diagnostics/#engine-control-system-diagnostics-introduction__dtc-check-clear) . NEXT: Go to next step
7. INSPECT ENGINE WATER PUMP ASSEMBLY HINT: Perform repair indoors or in a workshop. Connect the Techstream to the DLC3. Turn the power switch on (IG). Turn the Techstream on. Put the engine in inspection mode (maintenance mode). Refer to «INSPECTION MODE PROCEDURE»(/toyota/prius-v/i-2011-2014/remont/hoistjack/#introduction) . Enter the following menus: Powertrain / Engine and ECT / Data List / Primary / Coolant Temp and Elec Water Pump Spd. HINT: Display the Data List diagram. Idle the engine for about 20 minutes and check Coolant Temp, Elec Water Pump Spd using the Techstream, and check the cooling fans. RESULT Result Proceed to Either of the following conditions is met: The engine coolant temperature becomes 95°C (203°F) or higher and the engine water pump assembly performs intermittent operation (5 seconds pause after 25 seconds operation). The engine water pump assembly do not start operating even after the engine coolant temperature becomes 95°C (203°F) or higher.*1, *2 A The cooling fans start operating after the engine coolant temperature becomes 95°C (203°F) or less and decrease in the engine coolant temperature is observed.*3 B HINT: *1: Be careful when the cooling fans do not start operating even after the engine coolant temperature becomes 95°C (203°F) or higher because the engine coolant temperature increases rapidly. (Make sure to stop the engine if the engine coolant temperature becomes 105°C (221°F) or higher.) *2: If the ECM voltage is 14 V or higher and the engine water pump assembly is run excessively due to insufficient coolant etc., the water pump motor speed will exceed 5000 RPM. Enter the following menus to check the voltage of the ECM: Powertrain / Engine and ECT / Data List / Primary / Battery Voltage. Refer to «DATA LIST / ACTIVE TEST»(/toyota/prius-v/i-2011-2014/remont/testing-diagnostics/#engine-control-system-diagnostics-introduction) . *3: When the engine is warmed up, the cooling fans operate and the engine coolant temperature will decrease. After the cooling fans begin operating, the engine coolant temperature will stabilize between 88 to 95°C (190 to 203°F). B --> END A: Go to next step
8. REPLACE ENGINE WATER PUMP ASSEMBLY Replace the engine water pump assembly. Refer to «REMOVAL»(/toyota/prius-v/i-2011-2014/remont/cooling-fan/#engine-cooling-system-service-information) . NEXT: Go to next step
9. ADD ENGINE COOLANT Fill the reservoir tank up to the FULL line with engine coolant. NOTE: Make sure not to add engine coolant when the engine is hot. NEXT: Go to next step
10. CONFIRM WHETHER MALFUNCTION HAS BEEN SUCCESSFULLY REPAIRED HINT: Perform repair indoors or in a workshop. Connect the Techstream to the DLC3. Turn the power switch on (IG). Turn the Techstream on. Clear the DTCs. Refer to «DTC CHECK / CLEAR»(/toyota/prius-v/i-2011-2014/remont/testing-diagnostics/#engine-control-system-diagnostics-introduction__dtc-check-clear) . Put the engine in inspection mode (maintenance mode). Refer to «INSPECTION MODE PROCEDURE»(/toyota/prius-v/i-2011-2014/remont/hoistjack/#introduction) . Start the engine. Enter the following menus: Powertrain / Engine and ECT / Data List / Primary / Coolant Temp and Elec Water Pump Spd. Idle the engine for about 20 minutes and check Coolant Temp, Elec Water Pump Spd using the Techstream, and check the cooling fans. Result The cooling fans start operating after the engine coolant temperature becomes 95°C (203°F) or less and decrease in the engine coolant temperature is observed. NEXT --> END
11. GO TO DTC CHART. Refer to «DIAGNOSTIC TROUBLE CODE CHART»(/toyota/prius-v/i-2011-2014/remont/testing-diagnostics/#engine-control-system-diagnostics-introduction__diagnostic-trouble-code-chart)

The throttle actuator is operated by the ECM and opens and closes the throttle valve using gears.

The opening angle of the throttle valve is detected by the throttle position sensor, which is mounted on the throttle body assembly. The throttle position sensor provides feedback to the ECM. This feedback allows the ECM to appropriately control the throttle actuator and monitor the throttle opening angle as the ECM responds to driver inputs.

HINT

This electronic throttle control system does not use a throttle cable.

The ECM monitors the electrical current through the electronic actuator, and detects malfunctions and open circuits in the throttle actuator based on this value. If the current is outside the standard range, the ECM determines that there is a malfunction in the throttle actuator. In addition, if the throttle valve does not function properly (for example, stuck on), the ECM determines that there is a malfunction. The ECM then illuminates the MIL and stores a DTC.

Example

1. When the electrical current is below 0.5 A and the throttle actuator duty ratio exceeds 80%, the ECM interprets this as the current being outside the standard range, illuminates the MIL and stores a DTC.
2. If the malfunction is not repaired successfully, a DTC is stored when the engine is quickly revved to a high engine speed several times after the engine has idled for 5 seconds after engine start.

ALL

P2102

P2103

P2102

P2103 (CASE 1)

P2103 (CASE 2)

Scheme 57

1. Connect the Techstream to the DLC3.
2. Turn the power switch on (IG) and turn the Techstream on.
3. Clear the DTCs (even if no DTCs are stored, perform the clear DTC procedure). Refer to «DTC CHECK / CLEAR»(/toyota/prius-v/i-2011-2014/remont/testing-diagnostics/#engine-control-system-diagnostics-introduction__dtc-check-clear) .
4. Turn the power switch off and wait for 30 seconds.
5. Turn the power switch on (IG) and turn the Techstream on [A].
6. Put the engine in inspection mode (maintenance mode). Refer to «INSPECTION MODE PROCEDURE»(/toyota/prius-v/i-2011-2014/remont/hoistjack/#introduction) .
7. Start the engine.
8. With the vehicle stationary, fully depress the accelerator pedal and quickly release it [B].
9. Check that 16 seconds or more have elapsed from the instant when the accelerator pedal is first depressed.
10. Enter the following menus: Powertrain / Engine and ECT / Trouble Codes [C].
11. Read the pending DTCs. HINT: If a pending DTC is output, the system is malfunctioning. If a pending DTC is not output, perform the following procedure.
12. Enter the following menus: Powertrain / Engine and ECT / Utility / All Readiness.
13. Input the DTC: P2102 or P2103.
14. Check the DTC judgment result. Techstream Display Description NORMAL DTC judgment completed System normal ABNORMAL DTC judgment completed System abnormal INCOMPLETE DTC judgment not completed Perform driving pattern after confirming DTC enabling conditions N/A Unable to perform DTC judgment Number of DTCs which do not fulfill DTC preconditions has reached ECU memory limit HINT: If the judgment result shows NORMAL, the system is normal. If the judgment result shows ABNORMAL, the system has a malfunction. If the judgment result shows INCOMPLETE or N/A, perform steps [B] and [C] again.
15. If no pending DTC is output, perform a universal trip and check for permanent DTCs. Refer to «DTC CHECK / CLEAR»(/toyota/prius-v/i-2011-2014/remont/testing-diagnostics/#engine-control-system-diagnostics-introduction__dtc-check-clear) . HINT: If a permanent DTC is output, the system is malfunctioning. If no permanent DTC is output, the system is normal.

FAIL-SAFE

When either of these DTCs, as well as other DTCs relating to electronic throttle control system malfunctions is stored, the ECM enters fail-safe mode. During fail-safe mode, the ECM cuts the current to the throttle actuator, and the throttle valve is returned to a 5.5° throttle angle by the return spring. The ECM stops the engine and the vehicle can be driven using solely the hybrid system. If the accelerator pedal is depressed firmly and gently, the vehicle can be driven slowly.

Fail-safe mode continues until a pass condition is detected, and the power switch is then turned off.

Scheme 58

Note. Inspect the fuses for circuits related to this system before performing the following inspection procedure.

HINT

1. Read freeze frame data using the Techstream. The ECM records vehicle and driving condition information as freeze frame data the moment a DTC is stored. When troubleshooting, freeze frame data can help determine if the vehicle was moving or stationary, if the engine was warmed up or not, if the air fuel ratio was lean or rich, and other data from the time the malfunction occurred.
2. The throttle actuator current (Throttle Motor Current) and the throttle actuator duty ratio (Throttle Motor Duty (Open) / Throttle Motor Duty (Close)) can be read using the Techstream. However, the ECM shuts off the throttle actuator current when the electronic throttle control system malfunctions.

1. INSPECT THROTTLE BODY ASSEMBLY (RESISTANCE OF THROTTLE ACTUATOR) Inspect the throttle body assembly. Refer to «INSPECTION»(/toyota/prius-v/i-2011-2014/remont/testing-diagnostics/#engine-control-system-service-information) . NG --> See step 5 OK: Go to next step
2. CHECK HARNESS AND CONNECTOR (THROTTLE BODY ASSEMBLY - ECM) Disconnect the throttle body assembly connector. Disconnect the ECM connector. Measure the resistance according to the value(s) in the table below. Standard Resistance Tester Connection Condition Specified Condition D4-2 (M+) - D28-21 (M+) Always Below 1 ohms D4-1 (M-) - D28-20 (M-) Always Below 1 ohms D4-2 (M+) or D28-21 (M+) - Body ground Always 10 kohms or higher D4-1 (M-) or D28-20 (M-) - Body ground Always 10 kohms or higher NG --> REPAIR OR REPLACE HARNESS OR CONNECTOR OK: Go to next step
3. INSPECT THROTTLE BODY ASSEMBLY (VISUALLY CHECK THROTTLE VALVE) Check for foreign objects between the throttle valve and the housing. OK No foreign objects between throttle valve and housing. NG --> REMOVE FOREIGN OBJECT AND CLEAN THROTTLE BODY ASSEMBLY OK: Go to next step
4. INSPECT THROTTLE BODY ASSEMBLY (THROTTLE VALVE) Check if the throttle valve opens and closes smoothly. OK Throttle valve opens and closes smoothly. NG --> See step 5 OK --> See step 6
5. REPLACE THROTTLE BODY ASSEMBLY. Refer to «REMOVAL»(/toyota/prius-v/i-2011-2014/remont/testing-diagnostics/#engine-control-system-service-information)
6. REPLACE ECM. Refer to «REMOVAL»(/toyota/prius-v/i-2011-2014/remont/testing-diagnostics/#engine-control-system-service-information)

The throttle actuator is operated by the ECM, and opens and closes the throttle valve using gears. The opening angle of the throttle valve is detected by the throttle position sensor, which is mounted on the throttle body assembly. The throttle position sensor provides feedback to the ECM so that the ECM can control the throttle actuator (throttle valve) appropriately in response to driver inputs.

HINT

This electronic throttle control system does not use a throttle cable.

The ECM determines that there is a malfunction in the electronic throttle control system when the throttle valve remains at a fixed angle despite a high drive current from the ECM. The ECM illuminates the MIL and stores a DTC.

If the malfunction is not repaired successfully, a DTC is stored when the accelerator pedal is fully depressed and released quickly (to fully open and close the throttle valve) after the engine is next started.

ALL

P2111: THROTTLE ACTUATOR STUCK OPEN

P2112: THROTTLE ACTUATOR STUCK CLOSED

P2111: THROTTLE ACTUATOR STUCK OPEN

P2112: THROTTLE ACTUATOR STUCK CLOSED

Scheme 59

1. Connect the Techstream to the DLC3.
2. Turn the power switch on (IG) and turn the Techstream on.
3. Clear the DTCs (even if no DTCs are stored, perform the clear DTC procedure). Refer to «DTC CHECK / CLEAR»(/toyota/prius-v/i-2011-2014/remont/testing-diagnostics/#engine-control-system-diagnostics-introduction__dtc-check-clear) .
4. Turn the power switch off and wait for 30 seconds.
5. Turn the power switch on (IG) and turn the Techstream on [A].
6. Put the engine in inspection mode (maintenance mode). Refer to «INSPECTION MODE PROCEDURE»(/toyota/prius-v/i-2011-2014/remont/hoistjack/#introduction) .
7. Start the engine and fully depress and release the accelerator pedal quickly (to fully open and close the throttle valve).
8. Enter the following menus: Powertrain / Engine and ECT / Trouble Codes [B].
9. Read the pending DTCs. HINT: If a pending DTC is output, the system is malfunctioning. If a pending DTC is not output, perform the following procedure.
10. Enter the following menus: Powertrain / Engine and ECT / Utility / All Readiness.
11. Input the DTC: P2111 or P2112.
12. Check the DTC judgment result. Techstream Display Description NORMAL DTC judgment completed System normal ABNORMAL DTC judgment completed System abnormal INCOMPLETE DTC judgment not completed Perform driving pattern after confirming DTC enabling conditions N/A Unable to perform DTC judgment Number of DTCs which do not fulfill DTC preconditions has reached ECU's memory limit HINT: If the judgment result shows NORMAL, the system is normal. If the judgment result shows ABNORMAL, the system has a malfunction.
13. If the judgment result is INCOMPLETE or N/A and no pending DTC is output, perform a universal trip and check for permanent DTCs. Refer to «DTC CHECK / CLEAR»(/toyota/prius-v/i-2011-2014/remont/testing-diagnostics/#engine-control-system-diagnostics-introduction__dtc-check-clear) . HINT: If a permanent DTC is output, the system is malfunctioning. If no permanent DTC is output, the system is normal.

When either of these DTCs, as well as other DTCs relating to electronic throttle control system malfunctions is stored, the ECM enters fail-safe mode. During fail-safe mode, the ECM cuts the current to the throttle actuator, and the throttle valve is returned to a 5.5° throttle angle by the return spring. The ECM stops the engine and the vehicle can be driven using solely the hybrid system. If the accelerator pedal is depressed firmly and gently, the vehicle can be driven slowly.

Fail-safe mode continues until a pass condition is detected, and the power switch is then turned off.

WIRING DIAGRAM

Refer to DTC P2102. Refer to WIRING DIAGRAM .

Note. Inspect the fuses for circuits related to this system before performing the following inspection procedure.

HINT

1. Read freeze frame data using the Techstream. The ECM records vehicle and driving condition information as freeze frame data the moment a DTC is stored. When troubleshooting, freeze frame data can help determine if the vehicle was moving or stationary, if the engine was warmed up or not, if the air fuel ratio was lean or rich, and other data from the time the malfunction occurred.
2. Refer to "Data List / Active Test" [Throttle Position Command, Throttle Position No. 1, Throttle Motor Current, Throttle Motor Duty (Open), Throttle Motor Duty (Close)]. Refer to «DATA LIST / ACTIVE TEST»(/toyota/prius-v/i-2011-2014/remont/testing-diagnostics/#engine-control-system-diagnostics-introduction) .

1. CHECK ANY OTHER DTCS OUTPUT (IN ADDITION TO DTC P2111 OR P2112) Connect the Techstream to the DLC3. Turn the power switch on (IG). Turn the Techstream on. Enter the following menus: Powertrain / Engine and ECT / Trouble Codes. Read the DTCs. RESULT Result Proceed to DTC P2111 or P2112 is output A DTC P2111 or P2112 and other DTCs are output B HINT: If any DTCs other than P2111 or P2112 are output, troubleshoot those DTCs first. B --> See step 7 A: Go to next step
2. INSPECT THROTTLE BODY ASSEMBLY (VISUALLY CHECK THROTTLE VALVE) Check for contamination between the throttle valve and housing. If necessary, clean the throttle body assembly. Also, check that the throttle valve moves smoothly. OK Throttle valve is not contaminated with foreign objects and moves smoothly. NG --> See step 5 OK: Go to next step
3. READ VALUE USING TECHSTREAM (THROTTLE POSITION) Connect the Techstream to the DLC3. Turn the power switch on (IG). Turn the Techstream on. Clear the DTCs. Refer to «DTC CHECK / CLEAR»(/toyota/prius-v/i-2011-2014/remont/testing-diagnostics/#engine-control-system-diagnostics-introduction__dtc-check-clear) . Turn the power switch off and wait for at least 30 seconds. Turn the power switch on (IG) and turn the Techstream on. Enter the following menus: Powertrain / Engine and ECT / Data List / Gas Throttle / Throttle Position No. 1, Throttle Position No. 2 and Throttle Position Command. Check the values displayed on the Techstream while wiggling the ECM wire harness. Enter the following menus: Powertrain / Engine and ECT / Trouble Codes. Read the DTCs. RESULT Result Proceed to Value in Data List changes when wire harness is wiggled, or DTC is output A Other than above B B --> See step 6 A: Go to next step
4. REPAIR OR REPLACE HARNESS OR CONNECTOR (ECM - THROTTLE BODY ASSEMBLY) As the DTC was stored due to a change in the contact resistance of the connector, repair or replace the wire harness or connector. Refer to «ELECTRONIC CIRCUIT INSPECTION PROCEDURE»(/toyota/prius-v/i-2011-2014/remont/hoistjack/#introduction) . NEXT --> END
5. REPLACE THROTTLE BODY ASSEMBLY Replace the throttle body assembly. Refer to «REMOVAL»(/toyota/prius-v/i-2011-2014/remont/testing-diagnostics/#engine-control-system-service-information) . NEXT: Go to next step
6. CHECK WHETHER DTC OUTPUT RECURS (DTC P2111 OR P2112) Connect the Techstream to the DLC3. Turn the power switch on (IG). Turn the Techstream on. Clear the DTCs. Refer to «DTC CHECK / CLEAR»(/toyota/prius-v/i-2011-2014/remont/testing-diagnostics/#engine-control-system-diagnostics-introduction__dtc-check-clear) . Drive the vehicle in accordance with the driving pattern described in the Confirmation Driving Pattern. Enter the following menus: Powertrain / Engine and ECT / Trouble Codes. Read the DTCs. RESULT Result Proceed to DTC is not output A DTC P2111 or P2112 is output B B --> See step 8 A --> END
7. GO TO DTC CHART. Refer to «DIAGNOSTIC TROUBLE CODE CHART»(/toyota/prius-v/i-2011-2014/remont/testing-diagnostics/#engine-control-system-diagnostics-introduction__diagnostic-trouble-code-chart)
8. REPLACE ECM. Refer to «REMOVAL»(/toyota/prius-v/i-2011-2014/remont/testing-diagnostics/#engine-control-system-service-information)

The electronic throttle control system has a dedicated power supply circuit. The voltage (+BM) is monitored and when it is low (below 4 V), the ECM determines that there is a malfunction in the electronic throttle control system and cuts off the current to the throttle actuator.

When the voltage becomes unstable, the electronic throttle control system itself becomes unstable. For this reason, when the voltage is low, the current to the throttle actuator is cut. If repairs are made and the system returns to normal, turn the power switch off. The ECM then allows the current to flow to the throttle actuator so that it can be restarted.

HINT

This electronic throttle control system does not use a throttle cable.

Scheme 60

The ECM monitors the auxiliary battery supply voltage applied to the throttle actuator.

When the power supply voltage (+BM) drops below 4 V for 0.8 seconds or more, the ECM interprets this as an open in the power supply circuit (+BM). The ECM illuminates the MIL and stores the DTC.

If the malfunction is not repaired successfully, the DTC is stored 5 seconds after the engine is next started.

Scheme 61

1. Connect the Techstream to the DLC3.
2. Turn the power switch on (IG) and turn the Techstream on.
3. Clear the DTCs (even if no DTCs are stored, perform the clear DTC procedure). Refer to «DTC CHECK / CLEAR»(/toyota/prius-v/i-2011-2014/remont/testing-diagnostics/#engine-control-system-diagnostics-introduction__dtc-check-clear) .
4. Turn the power switch off and wait for 30 seconds.
5. Turn the power switch on (IG) and turn the Techstream on [A].
6. Put the engine in inspection mode (maintenance mode). Refer to «INSPECTION MODE PROCEDURE»(/toyota/prius-v/i-2011-2014/remont/hoistjack/#introduction) .
7. Start the engine.
8. Slowly depress the accelerator pedal, raise the engine speed to approximately 2500 RPM for approximately 5 seconds, and then idle the engine [B]. HINT: During charging control, the engine speed is set at idle. Therefore, the engine speed does not increase when depressing the accelerator pedal. In this case, perform step [B] after charging control has completed.
9. Enter the following menus: Powertrain / Engine and ECT / Trouble Codes [C].
10. Read the pending DTCs. HINT: If a pending DTC is output, the system is malfunctioning. If a pending DTC is not output, perform the following procedure.
11. Enter the following menus: Powertrain / Engine and ECT / Utility / All Readiness.
12. Input the DTC: P2118.
13. Check the DTC judgment result. Techstream Display Description NORMAL DTC judgment completed System normal ABNORMAL DTC judgment completed System abnormal INCOMPLETE DTC judgment not completed Perform driving pattern after confirming DTC enabling conditions N/A Unable to perform DTC judgment Number of DTCs which do not fulfill DTC preconditions has reached ECU memory limit HINT: If the judgment result shows NORMAL, the system is normal. If the judgment result shows ABNORMAL, the system has a malfunction. If the judgment result shows INCOMPLETE or N/A, perform steps [B] and [C] again.
14. If no pending DTC is output, perform a universal trip and check for permanent DTCs. Refer to «DTC CHECK / CLEAR»(/toyota/prius-v/i-2011-2014/remont/testing-diagnostics/#engine-control-system-diagnostics-introduction__dtc-check-clear) . HINT: If a permanent DTC is output, the system is malfunctioning. If no permanent DTC is output, the system is normal.

When this DTC or other DTCs relating to electronic throttle control system malfunctions, are stored, the ECM enters fail-safe mode. During fail-safe mode, the ECM cuts the current to the throttle actuator, and the throttle valve is returned to a 5.5° throttle angle by the return spring. The ECM stops the engine and the vehicle can be driven using solely the hybrid system. If the accelerator pedal is depressed firmly and gently, the vehicle can be driven slowly. Fail-safe mode continues until a pass condition is detected, and the power switch is then turned off.

Refer to DTC P2102. Refer to WIRING DIAGRAM .

Note. Inspect the fuses for circuits related to this system before performing the following inspection procedure.

HINT

Read freeze frame data using the Techstream. The ECM records vehicle and driving condition information as freeze frame data the moment a DTC is stored. When troubleshooting, freeze frame data can help determine if the vehicle was moving or stationary, if the engine was warmed up or not, if the air fuel ratio was lean or rich, and other data from the time the malfunction occurred.

1. READ VALUE USING TECHSTREAM (+BM VOLTAGE) Connect the Techstream to the DLC3. Turn the power switch on (IG). Turn the Techstream on. Enter the following menus: Powertrain / Engine and ECT / Data List / Gas Throttle / +BM voltage. Read the value displayed on the Techstream. RESULT Result Proceed to Below 11 V, or higher than 14 V A 11 to 14 V B B --> See step 3 A: Go to next step
2. CHECK HARNESS AND CONNECTOR (ECM - AUXILIARY BATTERY, BODY GROUND) Disconnect the ECM connectors. Measure the voltage according to the value(s) in the table below. Standard Voltage Tester Connection Condition Specified Condition A57-3 (+BM) - Body ground Always 11 to 14 V Measure the resistance according to the value(s) in the table below. Standard Resistance Tester Connection Condition Specified Condition D28-19 (ME01) - Body ground Always Below 1 ohms D28-104 (E1) - Body ground Always Below 1 ohms NG --> REPAIR OR REPLACE HARNESS OR CONNECTOR OK --> See step 4
3. CHECK FOR INTERMITTENT PROBLEMS. Refer to «CHECK FOR INTERMITTENT PROBLEMS»(/toyota/prius-v/i-2011-2014/remont/testing-diagnostics/#engine-control-system-diagnostics-introduction__check-for-intermittent-problems)
4. REPLACE ECM. Refer to «REMOVAL»(/toyota/prius-v/i-2011-2014/remont/testing-diagnostics/#engine-control-system-service-information)

The electronic throttle control system is composed of the throttle actuator, throttle position sensor, accelerator pedal position sensor, and ECM. The ECM operates the throttle actuator to regulate the throttle valve in response to driver inputs. The throttle position sensor detects the opening angle of the throttle valve, and provides the ECM with feedback so that the throttle valve can be appropriately controlled by the ECM.

The ECM determines the actual opening angle of the throttle valve from the throttle position sensor signal. The actual opening angle is compared to the target opening angle calculated by the ECM. If the difference between these two values is outside the standard range, the ECM interprets this as a malfunction in the electronic throttle control system. The ECM then illuminates the MIL and stores the DTC.

If the malfunction is not repaired successfully, the DTC is stored when the accelerator pedal is quickly released (to close the throttle valve) after the engine speed reaches 5000 RPM by the accelerator pedal being fully depressed (fully opening the throttle valve).

Scheme 62

1. Connect the Techstream to the DLC3.
2. Turn the power switch on (IG) and turn the Techstream on.
3. Clear the DTCs (even if no DTCs are stored, perform the clear DTC procedure). Refer to «DTC CHECK / CLEAR»(/toyota/prius-v/i-2011-2014/remont/testing-diagnostics/#engine-control-system-diagnostics-introduction__dtc-check-clear) .
4. Turn the power switch off and wait for 30 seconds.
5. Turn the power switch on (IG) and turn the Techstream on [A].
6. Put the engine in inspection mode (maintenance mode). Refer to «INSPECTION MODE PROCEDURE»(/toyota/prius-v/i-2011-2014/remont/hoistjack/#introduction) .
7. Start the engine.
8. Idle the engine for 20 seconds.
9. Enter the following menus: Powertrain / Engine and ECT / Trouble Codes [B].
10. Read the pending DTCs. HINT: If a pending DTC is output, the system is malfunctioning. If a pending DTC is not output, perform the following procedure.
11. Enter the following menus: Powertrain / Engine and ECT / Utility / All Readiness.
12. Input the DTC: P2119.
13. Check the DTC judgment result. Techstream Display Description NORMAL DTC judgment completed System normal ABNORMAL DTC judgment completed System abnormal INCOMPLETE DTC judgment not completed Perform driving pattern after confirming DTC enabling conditions N/A Unable to perform DTC judgment Number of DTCs which do not fulfill DTC preconditions has reached ECU memory limit HINT: If the judgment result shows NORMAL, the system is normal. If the judgment result shows ABNORMAL, the system has a malfunction. If the judgment result shows INCOMPLETE or N/A, fully depress and release the accelerator pedal 3 times, and the check the DTC judgment result [C].
14. If no pending DTC is output, perform a universal trip and check for permanent DTCs. Refer to «DTC CHECK / CLEAR»(/toyota/prius-v/i-2011-2014/remont/testing-diagnostics/#engine-control-system-diagnostics-introduction__dtc-check-clear) . HINT: If a permanent DTC is output, the system is malfunctioning. If no permanent DTC is output, the system is normal.

When this DTC, as well as other DTCs relating to electronic throttle control system malfunctions is stored, the ECM enters fail-safe mode. During fail-safe mode, the ECM cuts the current to the throttle actuator, and the throttle valve is returned to a 5.5° throttle angle by the return spring. The ECM stops the engine and the vehicle can be driven using solely the hybrid system. If the accelerator pedal is depressed firmly and gently, the vehicle can be driven slowly. Fail-safe mode continues until a pass condition is detected, and the power switch is then turned off.

Refer to DTC P2102. Refer to WIRING DIAGRAM .

Note. Inspect the fuses for circuits related to this system before performing the following inspection procedure.

HINT

1. Refer to "Data List / Active Test" [Throttle Position Commanded, Throttle Position No. 1, Throttle Motor Current, Throttle Motor Duty (Open) and Throttle Motor Duty (Close)]. Refer to «DATA LIST / ACTIVE TEST»(/toyota/prius-v/i-2011-2014/remont/testing-diagnostics/#engine-control-system-diagnostics-introduction) .
2. Read freeze frame data using the Techstream. The ECM records vehicle and driving condition information as freeze frame data the moment a DTC is stored. When troubleshooting, freeze frame data can help determine if the vehicle was moving or stationary, if the engine was warmed up or not, if the air fuel ratio was lean or rich, and other data from the time the malfunction occurred.

1. CHECK ANY OTHER DTCS OUTPUT (IN ADDITION TO DTC P2119) Connect the Techstream to the DLC3. Turn the power switch on (IG). Turn the Techstream on. Enter the following menus: Powertrain / Engine and ECT / Trouble Codes. Read the DTCs. RESULT Result Proceed to DTC P2119 is output A DTC P2119 and other DTCs are output B HINT: If any DTCs other than P2119 are output, troubleshoot those DTCs first. B --> See step 9 A: Go to next step
2. READ VALUE USING TECHSTREAM (THROTTLE POSITION) Connect the Techstream to the DLC3. Turn the power switch on (IG). Turn the Techstream on. Clear the DTCs. Refer to «DTC CHECK / CLEAR»(/toyota/prius-v/i-2011-2014/remont/testing-diagnostics/#engine-control-system-diagnostics-introduction__dtc-check-clear) . Turn the power switch off and wait for at least 30 seconds. Turn the power switch on (IG). Turn the Techstream on. Put the engine in inspection mode (maintenance mode). Refer to «INSPECTION MODE PROCEDURE»(/toyota/prius-v/i-2011-2014/remont/hoistjack/#introduction) . Start the engine. Enter the following menus: Powertrain / Engine and ECT / Data List / Gas Throttle / Throttle Position No. 1 and Throttle Position Command. Read the values displayed on the Techstream while fully depressing and releasing the accelerator pedal quickly. RESULT Result Proceed to Throttle Position No. 1 does not change A Throttle Position No. 1 changes even a little B HINT: When a DTC is output, the system changes to fail-safe mode. Therefore, only use the data up until the time the DTC is stored for confirmation. B --> See step 4 A: Go to next step
3. INSPECT THROTTLE BODY ASSEMBLY (RESISTANCE OF THROTTLE ACTUATOR) Inspect the throttle body assembly. Refer to «INSPECTION»(/toyota/prius-v/i-2011-2014/remont/testing-diagnostics/#engine-control-system-service-information) . NG --> See step 7 OK: Go to next step
4. INSPECT THROTTLE BODY ASSEMBLY (VISUALLY CHECK THROTTLE VALVE) Check for contamination between the throttle valve and housing. If necessary, clean the throttle body assembly. Also, check that the throttle valve moves smoothly. OK Throttle valve is not contaminated with foreign objects and moves smoothly. NG --> See step 7 OK: Go to next step
5. READ VALUE USING TECHSTREAM (THROTTLE POSITION) Connect the Techstream to the DLC3. Turn the power switch on (IG). Turn the Techstream on. Clear the DTCs. Refer to «DTC CHECK / CLEAR»(/toyota/prius-v/i-2011-2014/remont/testing-diagnostics/#engine-control-system-diagnostics-introduction__dtc-check-clear) . Turn the power switch off and wait for at least 30 seconds. Turn the power switch on (IG) and turn the Techstream on. Enter the following menus: Powertrain / Engine and ECT / Data List / Gas Throttle / Throttle Position No. 1, Throttle Position No. 2 and Throttle Position Command. Check the values displayed on the Techstream while wiggling the ECM wire harness. Enter the following menus: Powertrain / Engine and ECT / Trouble Codes. Read the DTCs. RESULT Result Proceed to Value in Data List changes when wire harness is wiggled, or DTC is output A Other than above B B --> See step 8 A: Go to next step
6. REPAIR OR REPLACE HARNESS OR CONNECTOR (ECM - THROTTLE BODY ASSEMBLY) As the DTC was stored due to a change in the contact resistance of the connector, repair or replace the wire harness or connector. Refer to «ELECTRONIC CIRCUIT INSPECTION PROCEDURE»(/toyota/prius-v/i-2011-2014/remont/hoistjack/#introduction) . NEXT --> END
7. REPLACE THROTTLE BODY ASSEMBLY Replace the throttle body assembly. Refer to «REMOVAL»(/toyota/prius-v/i-2011-2014/remont/testing-diagnostics/#engine-control-system-service-information) . NEXT: Go to next step
8. CHECK WHETHER DTC OUTPUT RECURS (DTC P2119) Connect the Techstream to the DLC3. Turn the power switch on (IG). Turn the Techstream on. Clear the DTCs. Refer to «DTC CHECK / CLEAR»(/toyota/prius-v/i-2011-2014/remont/testing-diagnostics/#engine-control-system-diagnostics-introduction__dtc-check-clear) . Drive the vehicle in accordance with the driving pattern described in the Confirmation Driving Pattern. Enter the following menus: Powertrain / Engine and ECT / Trouble Codes. Read the DTCs. RESULT Result Proceed to DTC is not output A DTC P2119 is output B B --> See step 10 A --> END
9. GO TO DTC CHART. Refer to «DIAGNOSTIC TROUBLE CODE CHART»(/toyota/prius-v/i-2011-2014/remont/testing-diagnostics/#engine-control-system-diagnostics-introduction__diagnostic-trouble-code-chart)
10. REPLACE ECM. Refer to «REMOVAL»(/toyota/prius-v/i-2011-2014/remont/testing-diagnostics/#engine-control-system-service-information)

The air fuel ratio sensor generates voltage* that corresponds to the actual air fuel ratio. This sensor voltage is used to provide the ECM with feedback so that it can control the air fuel ratio. The ECM determines the deviation from the stoichiometric air fuel ratio level, and regulates the fuel injection duration. If the air fuel ratio sensor malfunctions, the ECM is unable to control the air fuel ratio accurately.

The air fuel ratio sensor is a planar type with an integrated heater, which heats the solid electrolyte (zirconia element). This heater is controlled by the ECM. When the intake air volume is low (the exhaust gas temperature is low), current flows to the heater to heat the sensor, in order to facilitate accurate oxygen concentration detection. In addition, the sensor and heater portions are narrower than the conventional type. The heat generated by the heater is conducted to the solid electrolyte through the alumina, therefore the sensor activation is accelerated.

A three-way catalytic converter is used in order to convert the carbon monoxide (CO), hydrocarbon (HC), and nitrogen oxide (NOx) into less harmful substances. To allow the three-way catalytic converter to function effectively, it is necessary to keep the air fuel ratio of the engine near the stoichiometric air fuel ratio.

*: Value changes inside the ECM. Since the air fuel ratio sensor uses the current output element, the current is converted to a voltage inside the ECM. Any measurements taken at the air fuel ratio sensor or ECM connectors will show a constant voltage.

Scheme 63

HINT

1. When any of these DTCs are stored, check the air fuel ratio sensor output voltage by entering the following menus: Powertrain / Engine and ECT / Data List / Gas AF Control / AFS Voltage B1S1.
2. Short-term fuel trim values can also be read using the Techstream.
3. The ECM regulates the voltages at the A1A+ and A1A- terminals of the ECM to a constant level. Therefore, the air fuel ratio sensor output voltage cannot be confirmed without using the Techstream.
4. If an air fuel ratio sensor malfunction is detected, the ECM stores a DTC.

Sensor voltage detection monitor

Under air-fuel ratio feedback control, if the air fuel ratio sensor output voltage is below 2.8 V (very rich condition) for 5 seconds despite the rear heated oxygen sensor output voltage being below 0.59 V, the ECM stores DTC P2196. Alternatively, if the air fuel ratio sensor output voltage is higher than 3.8 V (very lean condition) for 5 seconds despite the rear heated oxygen sensor output voltage being 0.21 V or higher, DTC P2195 is stored.

Sensor current detection monitor

A rich air-fuel mixture causes a low air fuel ratio sensor current, and a lean air-fuel mixture causes a high air fuel ratio sensor current. Therefore, the sensor output becomes low during acceleration, and it becomes high during deceleration with the throttle valve fully closed. The ECM monitors the air fuel ratio sensor current during fuel-cut and detects any abnormal current values.

If the air fuel ratio sensor output is 2.2 mA or higher for more than 3 seconds of cumulative time, the ECM interprets this as a malfunction in the air fuel ratio sensor and stores DTC P2195 (stuck on high side). If the air fuel ratio sensor output is below 0.7 mA for more than 3 seconds of cumulative time, the ECM stores DTC P2196 (stuck on low side).

Scheme 64

ALL

P2195 AND P2196: SENSOR VOLTAGE DETECTION MONITOR

P2195 AND P2196: SENSOR CURRENT DETECTION MONITOR

P2195: SENSOR VOLTAGE DETECTION MONITOR (LEAN SIDE MALFUNCTION)

P2196: SENSOR VOLTAGE DETECTION MONITOR (RICH SIDE MALFUNCTION)

P2195: SENSOR CURRENT DETECTION MONITOR (HIGH SIDE MALFUNCTION)

P2196: SENSOR CURRENT DETECTION MONITOR (LOW SIDE MALFUNCTION)

Refer to detailed information in Checking Monitor Status. Refer to CHECKING MONITOR STATUS .

P2195, P2196: O2 SENSOR / RANGE B1S1

Scheme 65

Scheme 66

1. Connect the Techstream to the DLC3.
2. Turn the power switch on (IG).
3. Turn the Techstream on.
4. Clear the DTCs (even if no DTCs are stored, perform the clear DTC procedure). Refer to «DTC CHECK / CLEAR»(/toyota/prius-v/i-2011-2014/remont/testing-diagnostics/#engine-control-system-diagnostics-introduction__dtc-check-clear) .
5. Turn the power switch off and wait for 30 seconds.
6. Turn the power switch on (IG) and turn the Techstream on.
7. Put the engine in inspection mode (maintenance mode). Refer to «INSPECTION MODE PROCEDURE»(/toyota/prius-v/i-2011-2014/remont/hoistjack/#introduction) .
8. Start the engine, and warm it up until the engine coolant temperature reaches 75°C (167°F) or higher [A].
9. On the Techstream, enter the following menus to check the fuel-cut status: Powertrain / Engine and ECT / Data List / Primary / Idle Fuel Cut.
10. Drive the vehicle at between 75 and 120 km/h (47 and 75 mph) for at least 10 minutes [B]. WARNING: When performing the confirmation driving pattern, obey all speed limits and traffic laws.
11. Move the shift lever in B [C].
12. Accelerate the vehicle to 75 km/h (47 mph) or more by depressing the accelerator pedal for at least 10 seconds [D]. WARNING: When performing the confirmation driving pattern, obey all speed limits and traffic laws.
13. Soon after performing step [D] above, release the accelerator pedal for at least 4 seconds without depressing the brake pedal in order to execute fuel-cut control [E]. HINT: While "Idle Fuel Cut" on the Data List is ON, fuel-cut control is being executed.
14. Allow the vehicle to decelerate until the vehicle speed decreases to less than 10 km/h (6 mph).
15. Repeat steps [C] through [E] above at least 3 times in one driving cycle.
16. Enter the following menus: Powertrain / Engine and ECT / Trouble Codes [F].
17. Read the pending DTCs. HINT: If a pending DTC is output, the system is malfunctioning. If a pending DTC is not output, perform the following procedure.
18. Enter the following menus: Powertrain / Engine and ECT / Utility / All Readiness.
19. Input the DTC: P2195 or P2196.
20. Check the DTC judgment result. Techstream Display Description NORMAL DTC judgment completed System normal ABNORMAL DTC judgment completed System abnormal INCOMPLETE DTC judgment not completed Perform driving pattern after confirming DTC enabling conditions N/A Unable to perform DTC judgment Number of DTCs which do not fulfill DTC preconditions has reached ECU memory limit HINT: If the judgment result shows NORMAL, the system is normal. If the judgment result shows ABNORMAL, the system has a malfunction. If the judgment result shows INCOMPLETE or N/A, perform steps [B] through [E].
21. If no pending DTC is output, perform a universal trip and check for permanent DTCs. Refer to «DTC CHECK / CLEAR»(/toyota/prius-v/i-2011-2014/remont/testing-diagnostics/#engine-control-system-diagnostics-introduction__dtc-check-clear) . HINT: If a permanent DTC is output, the system is malfunctioning. If no permanent DTC is output, the system is normal.

Scheme 67

Note. Inspect the fuses for circuits related to this system before performing the following inspection procedure.

HINT

1. Although the DTC titles say oxygen sensor, these DTCs relate to the air fuel ratio sensor.
2. Sensor 1 refers to the sensor mounted in front of the three-way catalytic converter and located near the engine assembly.
3. Read freeze frame data using the Techstream. The ECM records vehicle and driving condition information as freeze frame data the moment a DTC is stored. When troubleshooting, freeze frame data can help determine if the vehicle was moving or stationary, if the engine was warmed up or not, if the air fuel ratio was lean or rich, and other data from the time the malfunction occurred.
4. A low air fuel ratio sensor voltage could be caused by a rich air fuel mixture. Check for conditions that would cause the engine to run rich.
5. A high air fuel ratio sensor voltage could be caused by a lean air fuel mixture. Check for conditions that would cause the engine to run lean.
6. Sensor 1 refers to the sensor closest to the engine assembly.
7. Sensor 2 refers to the sensor farthest away from the engine assembly.

1. CHECK ANY OTHER DTCS OUTPUT (IN ADDITION TO P2195 OR P2196) Connect the Techstream to the DLC3. Turn the power switch on (IG). Turn the Techstream on. Enter the following menus: Powertrain / Engine and ECT / Trouble Codes. Read the DTCs. RESULT Result Proceed to DTC P2195 or P2196 is output A DTC P2195 or P2196 and P0136, P0137 or P0138 are output A DTC P2195 or P2196 and other DTCs are output B HINT: If any DTCs relating to the air fuel ratio sensor (DTCs for the air fuel ratio sensor heater or air fuel ratio sensor admittance) are output, troubleshoot those DTCs first. B --> See step 19 A: Go to next step
2. CONFIRM IF VEHICLE HAS RUN OUT OF FUEL IN PAST Has the vehicle run out of fuel in the past? NO --> See step 4 YES: Go to next step
3. CHECK WHETHER DTC OUTPUT RECURS (DTC P2195 OR P2196) Connect the Techstream to the DLC3. Turn the power switch on (IG). Turn the Techstream on. Clear the DTCs. Refer to «DTC CHECK / CLEAR»(/toyota/prius-v/i-2011-2014/remont/testing-diagnostics/#engine-control-system-diagnostics-introduction__dtc-check-clear) . Turn the power switch off and wait for 30 seconds. Drive the vehicle in accordance with the driving pattern described in the Confirmation Driving Pattern. Enter the following menus: Powertrain / Engine and ECT / Utility / All Readiness. Input the DTC: P2195 or P2196. Check the DTC judgment result. RESULT Result Proceed to NORMAL (DTC is not output) A ABNORMAL (DTC P2195 or P2196 is output) B B --> See step 4 A --> DTC CAUSED BY RUNNING OUT OF FUEL
4. READ VALUE USING TECHSTREAM (TEST VALUE OF AIR FUEL RATIO SENSOR) Connect the Techstream to the DLC3. Turn the power switch on (IG). Turn the Techstream on. Clear the DTCs. Refer to «DTC CHECK / CLEAR»(/toyota/prius-v/i-2011-2014/remont/testing-diagnostics/#engine-control-system-diagnostics-introduction__dtc-check-clear) . Put the engine in inspection mode (maintenance mode). Refer to «INSPECTION MODE PROCEDURE»(/toyota/prius-v/i-2011-2014/remont/hoistjack/#introduction) . Drive the vehicle in accordance with the driving pattern described in the Confirmation Driving Pattern. Enter the following menus: Powertrain / Engine and ECT / Monitor / Current Monitor / O2 Sensor / Current. Check that the status of O2 Sensor is Complete. If the status is still Incomplete, drive the vehicle according to the driving pattern again. Enter the following menus: Powertrain / Engine and ECT / Monitor / Current Monitor / O2 Sensor / Details / RANGE B1S1. Check the test value of the air fuel ratio sensor output current during fuel cut. RESULT Test Value Proceed to Within normal range (0.7 mA or higher, and below 2.2 mA) A Outside normal range (Below 0.7 mA, or 2.2 mA or higher) B B --> See step 16 A: Go to next step
5. READ VALUE USING TECHSTREAM (OUTPUT VOLTAGE OF AIR FUEL RATIO SENSOR) Connect the Techstream to the DLC3. Turn the power switch on (IG). Turn the Techstream on. Put the engine in inspection mode (maintenance mode). Refer to «INSPECTION MODE PROCEDURE»(/toyota/prius-v/i-2011-2014/remont/hoistjack/#introduction) . Start the engine. Warm up the engine and run the engine at an engine speed of 2500 RPM for 90 seconds. HINT: During charging control, the engine speed is set at idle. Therefore, the engine speed does not increase when depressing the accelerator pedal. In this case, warm up the engine after charging control has completed. Enter the following menus: Powertrain / Engine and ECT / Active Test / Control the Injection Volume / Data List / Gas AF Control / AFS Voltage B1S1 and O2S B1S1. Perform the Control the Injection Volume operation with the engine idling. Monitor the output voltages of the air fuel ratio and heated oxygen sensors (AFS Voltage B1S1 and O2S B1S2) displayed on the Techstream. HINT: Change the fuel injection volume within the range of -12% to +12%. The injection volume can be changed in fine gradations. The air fuel ratio sensor has an output delay of a few seconds and the heated oxygen sensor has a maximum output delay of approximately 20 seconds. If the sensor output voltage does not change (almost no reaction) while performing the Active Test, the sensor may be malfunctioning. Techstream Display (Sensor) Injection Volume Status Voltage AFS Voltage B1S1 (Air fuel ratio) +12% Rich Below 3.1 V AFS Voltage B1S1 (Air fuel ratio) -12% Lean Higher than 3.4 V O2S B1S2 (Heated oxygen) +12% Rich Higher than 0.55 V O2S B1S2 (Heated oxygen) -12% Lean Below 0.4 V RESULT Status of AFS Voltage B1S1 Status of O2S B1S2 Air Fuel Ratio Condition and Air Fuel Ratio Sensor Condition Proceed to Lean Lean Actual air fuel ratio lean A Rich Rich Actual air fuel ratio rich A Lean Lean/Rich Air fuel ratio sensor malfunction B Rich Lean/Rich Air fuel ratio sensor malfunction B Lean/Rich Lean/Rich Normal C Lean: During the Control the Injection Volume Active Test, the air fuel ratio sensor output voltage (AFS Voltage) is consistently higher than 3.4 V, and the heated oxygen sensor output voltage (O2S) is consistently below 0.4 V. Rich: During the Control the Injection Volume Active Test, the AFS Voltage is consistently below 3.1 V, and the O2S is consistently higher than 0.55 V. Lean/Rich: During the Control the Injection Volume Active Test, the output voltage of the heated oxygen sensor alternates correctly. HINT: Refer to "Data List / Active Test" [AFS Voltage B1S1 and O2S B1S2]. Refer to «DATA LIST / ACTIVE TEST»(/toyota/prius-v/i-2011-2014/remont/testing-diagnostics/#engine-control-system-diagnostics-introduction) . B --> See step 16 C --> See step 20 A: Go to next step
6. CHECK INTAKE SYSTEM Check the intake system for vacuum leaks. Refer to «ON-VEHICLE INSPECTION»(/toyota/prius-v/i-2011-2014/remont/mechanical/#engine-intake-system-inspection) . OK No leaks in intake system. NG --> REPAIR OR REPLACE INTAKE SYSTEM OK: Go to next step
7. CHECK FOR EXHAUST GAS LEAK Check for exhaust gas leaks. OK No gas leaks. NG --> REPAIR OR REPLACE EXHAUST SYSTEM OK: Go to next step
8. CHECK FUEL PRESSURE Check the fuel pressure. Refer to «ON-VEHICLE INSPECTION - Step 2»(/toyota/prius-v/i-2011-2014/remont/fuel-system/#fuel-system-inspection) . NG --> See step 18 OK: Go to next step
9. INSPECT FUEL INJECTOR ASSEMBLY Check the fuel injector assembly (whether fuel volume is high or low, and whether injector pattern is poor). Refer to «INSPECTION»(/toyota/prius-v/i-2011-2014/remont/fuel-system/#fuel-system-service-information) . NG --> See step 21 OK: Go to next step
10. REPLACE AIR FUEL RATIO SENSOR Replace the air fuel ratio sensor. Refer to «REMOVAL»(/toyota/prius-v/i-2011-2014/remont/testing-diagnostics/#engine-control-system-service-information) . NEXT: Go to next step
11. CHECK WHETHER DTC OUTPUT RECURS (DTC P2195 OR P2196) Connect the Techstream to the DLC3. Turn the power switch on (IG). Turn the Techstream on. Clear the DTCs. Refer to «DTC CHECK / CLEAR»(/toyota/prius-v/i-2011-2014/remont/testing-diagnostics/#engine-control-system-diagnostics-introduction__dtc-check-clear) . Turn the power switch off and wait for 30 seconds. Drive the vehicle in accordance with the driving pattern described in the Confirmation Driving Pattern. Enter the following menus: Powertrain / Engine and ECT / Utility / All Readiness. Input the DTC: P2195 or P2196. Check the DTC judgment result. RESULT Result Proceed to ABNORMAL (DTC P2195 or P2196 is output) A NORMAL (DTC is not output) B B --> END A: Go to next step
12. PERFORM ACTIVE TEST USING TECHSTREAM (CONTROL THE EGR STEP POSITION) Connect the Techstream to the DLC3. Turn the power switch on (IG). Turn the Techstream on. Put the engine in inspection mode (maintenance mode). Refer to «INSPECTION MODE PROCEDURE»(/toyota/prius-v/i-2011-2014/remont/hoistjack/#introduction) . Start the engine and warm it up until the engine coolant temperature reaches 75°C (167°F) or higher. HINT: The A/C switch and all accessory switches should be off. Enter the following menus: Powertrain / Engine and ECT / Active Test / Control the EGR Step Position / Data List / Primary / MAP. Check the engine idling condition and MAP values in the Data List while performing the Active Test. HINT: Do not leave the EGR valve open for 10 seconds or more during Active Test. Be sure to return the EGR valve to step 0 when Active Test is completed. Do not open the EGR valve 30 steps or more during the Active Test. OK MAP and idling condition change in response to EGR step position. Standard - EGR Step Position (Active Test) 0 Steps 0 to 30 Steps Idling condition Steady idling Idling changes from steady to rough idling or engine stalls MAP (Data List) MAP value is 20 to 40 kPa (150 to 300 mmHg) (EGR valve is fully closed) MAP value is at least +10 kPa (75 mmHg) higher than when EGR valve is fully closed HINT: During Active Test, if the idling condition does not change in response to EGR step position, then there is probably a malfunction in EGR valve. Result Result Proceed to Outside of standard range A Within standard range B B --> See step 14 A: Go to next step
13. INSPECT EGR VALVE ASSEMBLY Remove the EGR valve assembly. Refer to «REMOVAL»(/toyota/prius-v/i-2011-2014/remont/auxiliary-emission-control-systems/#emission-control-system-service-information) . Check if the EGR valve is stuck open. OK EGR valve us tightly closed. NG --> See step 22 OK: Go to next step
14. REPLACE ECM Replace the ECM. Refer to «REMOVAL»(/toyota/prius-v/i-2011-2014/remont/testing-diagnostics/#engine-control-system-service-information) . NEXT: Go to next step
15. CONFIRM WHETHER MALFUNCTION HAS BEEN SUCCESSFULLY REPAIRED Connect the Techstream to the DLC3. Turn the power switch on (IG). Turn the Techstream on. Clear the DTCs. Refer to «DTC CHECK / CLEAR»(/toyota/prius-v/i-2011-2014/remont/testing-diagnostics/#engine-control-system-diagnostics-introduction__dtc-check-clear) . Turn the power switch off and wait for 30 seconds. Drive the vehicle in accordance with the driving pattern described in the Confirmation Driving Pattern. Enter the following menus: Powertrain / Engine and ECT / Utility / All Readiness. Input the DTC: P2195 or P2196. Check the DTC judgment result. RESULT Techstream Display Description NORMAL DTC judgment completed System normal ABNORMAL DTC judgment completed System abnormal INCOMPLETE DTC judgment not completed Perform driving pattern after confirming DTC enabling conditions N/A Unable to perform DTC judgment Number of DTCs which do not fulfill DTC preconditions has reached ECU memory limit NEXT --> END
16. REPLACE AIR FUEL RATIO SENSOR Replace the air fuel ratio sensor. Refer to «REMOVAL»(/toyota/prius-v/i-2011-2014/remont/testing-diagnostics/#engine-control-system-service-information) . NEXT: Go to next step
17. CHECK WHETHER DTC OUTPUT RECURS (DTC P2195 OR P2196) Connect the Techstream to the DLC3. Turn the power switch on (IG). Turn the Techstream on. Clear the DTCs. Refer to «DTC CHECK / CLEAR»(/toyota/prius-v/i-2011-2014/remont/testing-diagnostics/#engine-control-system-diagnostics-introduction__dtc-check-clear) . Turn the power switch off and wait for 30 seconds. Drive the vehicle in accordance with the driving pattern described in the Confirmation Driving Pattern. Enter the following menus: Powertrain / Engine and ECT / Utility / All Readiness. Input the DTC: P2195 or P2196. Check the DTC judgment result. RESULT Result Proceed to NORMAL (DTC is not output) A ABNORMAL (DTC P2195 or P2196 is output) B B --> See step 23 A --> END
18. CHECK FUEL LINE Check the fuel lines for leaks or blockage. NG --> REPAIR OR REPLACE FUEL LINE OK --> See step 24
19. GO TO DTC CHART. Refer to «DIAGNOSTIC TROUBLE CODE CHART»(/toyota/prius-v/i-2011-2014/remont/testing-diagnostics/#engine-control-system-diagnostics-introduction__diagnostic-trouble-code-chart)
20. CHECK FOR INTERMITTENT PROBLEMS. Refer to «CHECK FOR INTERMITTENT PROBLEMS»(/toyota/prius-v/i-2011-2014/remont/testing-diagnostics/#engine-control-system-diagnostics-introduction__check-for-intermittent-problems)
21. REPLACE FUEL INJECTOR ASSEMBLY. Refer to «REMOVAL»(/toyota/prius-v/i-2011-2014/remont/fuel-system/#fuel-system-service-information)
22. REPLACE EGR VALVE ASSEMBLY. Refer to «REMOVAL»(/toyota/prius-v/i-2011-2014/remont/auxiliary-emission-control-systems/#emission-control-system-service-information)
23. REPLACE ECM. Refer to «REMOVAL»(/toyota/prius-v/i-2011-2014/remont/testing-diagnostics/#engine-control-system-service-information)
24. REPLACE FUEL PUMP. Refer to «REMOVAL»(/toyota/prius-v/i-2011-2014/remont/fuel-system/#fuel-system-service-information)

Refer to DTC P0300. Refer to DESCRIPTION .

Refer to DTC P2195. Refer to DESCRIPTION .

Fuel System Air-fuel Ratio Cylinder Imbalance Monitor

The ECM uses the air fuel ratio sensor monitoring method and the crankshaft position sensor monitoring method to monitor injector injection volume inconsistencies and air fuel ratio imbalance between the cylinders due to leaks in the air intake/exhaust system, etc.

If the air fuel ratios between the cylinders are inconsistent due to cylinders being lean or rich, the ECM stores a DTC.

A/F Sensor Monitoring Method

When the ECM detects an air fuel ratio imbalance between the cylinders based on the fluctuations in air fuel ratio sensor output through all 4 strokes of one cycle (2 rotations of the crankshaft), the ECM determines that there is a malfunction.

Crankshaft Position Sensor Monitoring Method

The ECM monitors engine speed fluctuations. When the engine speed fluctuates significantly, the ECM judges this as an air fuel ratio imbalance and then determines this as a malfunction.

ALL

AIR FUEL RATIO SENSOR MONITORING METHOD

CRANKSHAFT POSITION SENSOR MONITORING METHOD (FIRST JUDGMENT)

CRANKSHAFT POSITION SENSOR MONITORING METHOD (SECOND JUDGMENT)

AIR FUEL RATIO SENSOR MONITORING METHOD

CRANKSHAFT POSITION SENSOR MONITORING METHOD (FIRST JUDGMENT)

CRANKSHAFT POSITION SENSOR MONITORING METHOD (SECOND JUDGMENT)

HINT

If the first judgment while driving shows that the value of Engine Speed Fluctuation Avg (worst value) is between 0.5 and 1.5, then second judgment will be performed when the vehicle is stopped and the engine is idling.

Refer to detailed information in Checking Monitor Status. Refer to CHECKING MONITOR STATUS .

P219A: FUEL SYSTEM / A/F SENSOR DETERMINATION B1

P219A: FUEL SYSTEM / ENGINE SPEED FLUCTUATION AVERAGE B1

Scheme 68

1. Connect the Techstream to the DLC3.
2. Turn the power switch on (IG) and turn the Techstream on.
3. Put the engine in inspection mode (maintenance mode). Refer to «INSPECTION MODE PROCEDURE»(/toyota/prius-v/i-2011-2014/remont/hoistjack/#introduction) .
4. Start the engine and warm it up until the engine coolant temperature reaches 75°C (167°F) or higher [A]. HINT: Warm up the engine so that the SOC (State of Charge) may become 60% or more.
5. Clear the DTCs (even if no DTCs are stored, perform the clear DTC operation). Refer to «DTC CHECK / CLEAR»(/toyota/prius-v/i-2011-2014/remont/testing-diagnostics/#engine-control-system-diagnostics-introduction__dtc-check-clear) . WARNING: Use the Techstream to clear the DTCs (Do not disconnect the cable from negative (-) auxiliary battery terminal to clear the DTCs).
6. Gradually accelerate the vehicle from 60 km/h (37 mph) taking approximately 10 to 20 seconds. HINT: Refer to Typical Enabling Conditions for mass air flow and engine speed, and then accelerate the vehicle from 60 km/h (37 mph).
7. Drive the vehicle at 60 km/h (37 mph) or higher for 1 minute or more [B]. WARNING: When performing the confirmation driving pattern, obey all speed limits and traffic laws. HINT: Electrical load can be applied while the vehicle is driven.
8. Idle the engine for 1 minute or more [C]. HINT: Drive (D) has been selected.
9. Repeat steps [B] and [C] above at least 3 times [D].
10. Enter the following menus: Powertrain / Engine and ECT / Trouble Codes [E].
11. Read the pending DTCs. HINT: If a pending DTC is output, the system is malfunctioning. If a pending DTC is not output, perform the following procedure.
12. Gradually accelerate the vehicle from 60 km/h (37 mph) taking approximately 20 to 30 seconds. HINT: Refer to Typical Enabling Conditions for mass air flow and engine speed, and then accelerate the vehicle from 60 km/h (37 mph).
13. Drive the vehicle at 60 km/h (37 mph) or higher for 1 minutes or more [F]. WARNING: When performing the confirmation driving pattern, obey all speed limits and traffic laws. HINT: Electrical load can be applied while the vehicle is driven.
14. Idle the engine for 1 minute or more [G]. HINT: Drive (D) has been selected.
15. Repeat steps [F] and [G] above at least 2 times [H].
16. Enter the following menus: Powertrain / Engine and ECT / Trouble Codes [I].
17. Read the pending DTCs. HINT: If a pending DTC is output, the system is malfunctioning. If a pending DTC is not output, perform the following procedure.
18. Enter the following menus: Powertrain / Engine and ECT / Utility / All Readiness.
19. Input the DTC: P219A.
20. Check the DTC judgment result. Techstream Display Description NORMAL DTC judgment completed System normal ABNORMAL DTC judgment completed System abnormal INCOMPLETE DTC judgment not completed Perform driving pattern after confirming DTC enabling conditions N/A Unable to perform DTC judgment Number of DTCs which do not fulfill DTC preconditions has reached ECU memory limit HINT: If the judgment result shows NORMAL, the system is normal. If the judgment result shows ABNORMAL, the system has a malfunction. If the judgment result shows INCOMPLETE or N/A, perform the following procedure.
21. If no pending DTC is output, perform a universal trip and check for permanent DTCs. Refer to «DTC CHECK / CLEAR»(/toyota/prius-v/i-2011-2014/remont/testing-diagnostics/#engine-control-system-diagnostics-introduction__dtc-check-clear) . HINT: If a permanent DTC is output, the system is malfunctioning. If no permanent DTC is output, the system is normal.

Refer to Fuel Injector Circuit. Refer to WIRING DIAGRAM .

HINT

1. Read freeze frame data using the Techstream. Freeze frame data records the engine condition when malfunctions are detected. When troubleshooting, freeze frame data can help determine if the vehicle was moving or stationary, if the engine was warmed up or not, if the air-fuel ratio was lean or rich, and other data from the time the malfunction occurred.
2. Sensor 1 refers to the sensor closest to the engine assembly.
3. Sensor 2 refers to the sensor farthest away from the engine assembly.
4. Refer to "Data List / Active Test" [A/F Sensor Determination (worst value) #1, Engine Speed Fluctuation Avg (worst value) #1 to #4, Cylinder #1 to #4 Misfire Count, Short FT #1 and Long FT #1]. Refer to «DATA LIST / ACTIVE TEST»(/toyota/prius-v/i-2011-2014/remont/testing-diagnostics/#engine-control-system-diagnostics-introduction) .

Scheme 69

1. CHECK ANY OTHER DTCS OUTPUT (IN ADDITION TO P219A) Connect the Techstream to the DLC3. Turn the power switch to on (IG). Turn the Techstream on. Enter the following menus: Powertrain / Engine and ECT / Trouble Codes. Read the DTCs. RESULT Result Proceed to DTC P219A is output A DTC P219A and other DTCs are output B HINT: If any DTCs other than P219A are output, troubleshoot those DTCs first. B --> See step 14 A: Go to next step
2. READ VALUE USING TECHSTREAM (FREEZE FRAME DATA) Connect the Techstream to the DLC3. Turn the power switch on (IG). Using the Techstream, confirm the vehicle conditions recorded in the freeze frame data which were present when the DTC was stored. Refer to «FREEZE FRAME DATA»(/toyota/prius-v/i-2011-2014/remont/testing-diagnostics/#engine-control-system-diagnostics-introduction) . Freeze Frame Data Item for DTC P219A Vehicle Speed Engine Speed Calculate Load Short FT #1 Long FT #1 Cylinder #1 Misfire Count to Cylinder #4 Misfire Count A/F Sensor Determination (worst value) #1 Engine Speed Fluctuation Avg (worst value) #1 to #4 HINT: If [Shot FT + Long FT] shows a positive value, then the air fuel ratio is lean. A negative value means that the air fuel ratio is rich. NEXT: Go to next step
3. READ VALUE USING TECHSTREAM (MONITOR RESULT) Connect the Techstream to the DLC3. Turn the power switch on (IG). Turn the Techstream on. Drive the vehicle in accordance with the driving pattern described in the Confirmation Driving Pattern. HINT: If the value of "Cylinder #1 Misfire Count to Cylinder #4 Misfire Count" increases while idling or driving, proceed to step 6. Inspect the cylinders which have an increased misfire count as indicated by "Cylinder #1 Misfire Count to Cylinder #4 Misfire Count". Enter the following menus: Powertrain / Engine and ECT / Monitor / Current Monitor / Fuel System / Details / A/F SENSOR DETERMINATION B1 and ENGINE SPEED FLUCTUATION AVERAGE B1. Check the Test Result (A/F SENSOR DETERMINATION B1 and ENGINE SPEED FLUCTUATION AVERAGE B1. RESULT Result Proceed to A/F SENSOR DETERMINATION is Fail A A/F SENSOR DETERMINATION and ENGINE SPEED FLUCTUATION AVERAGE are Fail B ENGINE SPEED FLUCTUATION AVERAGE is Fail B* HINT: If neither A/F SENSOR DETERMINATION nor ENGINE SPEED FLUCTUATION AVERAGE shows Fail (both remain showing Pass), then drive the vehicle in accordance with the driving pattern described in Confirmation Driving Pattern again. If Fail is not displayed (Pass is still displayed) after driving, proceed to step 4. *: Inspect the cylinders which have the larger values, focusing on the cylinder which has the largest value, as indicated by "Engine Speed Fluctuation Avg (worst value) #1 to #4". B --> See step 6 A: Go to next step
4. PERFORM ACTIVE TEST USING TECHSTREAM (CONTROL THE INJECTION VOLUME) Connect the Techstream to the DLC3. Turn the power switch on (IG). Turn the Techstream on. Put the engine in inspection mode (maintenance mode). Refer to «INSPECTION MODE PROCEDURE»(/toyota/prius-v/i-2011-2014/remont/hoistjack/#introduction) . Warm up the engine. HINT: The A/C switch and all accessory switches should be off and the shift neutral (N) or park (P) should be selected. Enter the following menus: Powertrain / Engine and ECT / Active Test / Control the Injection Volume / Data List / Gas Misfire / Cylinder #1 to #4 Misfire Count. HINT: If the misfire count increases when Control the Injection Volume is selected (the injection volume is 0%), proceed to step 6, Check Intake System. Perform the Control the Injection Volume operation with the engine idling. Check Cylinder #1 to #4 Misfire Count while decreasing the injection volume in increments of 5%. NOTE: Do not decrease the injection volume to lower than -20%. Result It can be determined that the cylinder whose misfire count does not increase is rich. Therefore, inspect the cylinders whose misfire counts do not increase. NEXT: Go to next step
5. CHECK FOR EXHAUST GAS LEAK Check for exhaust gas leaks. OK No exhaust gas leaks. NG --> REPAIR OR REPLACE EXHAUST SYSTEM OK: Go to next step
6. CHECK INTAKE SYSTEM Check the intake system for vacuum leaks. Refer to «ON-VEHICLE INSPECTION»(/toyota/prius-v/i-2011-2014/remont/mechanical/#engine-intake-system-inspection) . OK No leaks in intake system. NG --> REPAIR OR REPLACE INTAKE SYSTEM OK: Go to next step
7. INSPECT SPARK PLUG Inspect the spark plug of the imbalanced cylinder. Refer to «ON-VEHICLE INSPECTION - Step 3»(/toyota/prius-v/i-2011-2014/remont/ignition-system/#ignition-system-inspection) . NG --> See step 15 OK: Go to next step
8. CHECK FOR SPARK (SPARK TEST) Perform a spark test. Refer to «ON-VEHICLE INSPECTION - Step 1»(/toyota/prius-v/i-2011-2014/remont/ignition-system/#ignition-system-inspection) . HINT: If the result of the spark test is normal, proceed to the next step. NEXT: Go to next step
9. CHECK CYLINDER COMPRESSION PRESSURE Measure the cylinder compression pressure of the misfiring cylinder. Refer to «ON-VEHICLE INSPECTION - Step 8»(/toyota/prius-v/i-2011-2014/remont/mechanical/#engine-mechanical-service-information) . NG --> CHECK ENGINE TO DETERMINE CAUSE OF LOW COMPRESSION OK: Go to next step
10. CHECK TERMINAL VOLTAGE (POWER SOURCE OF FUEL INJECTOR ASSEMBLY) Disconnect the ECM connector. Turn the power switch on (IG). Measure the voltage according to the value(s) in the table below. Standard Voltage Tester Connection Condition Specified Condition D27-85 (#10) - D27-109 (E01) Power switch on (IG) 11 to 14 V D27-84 (#20) - D27-109 (E01) Power switch on (IG) 11 to 14 V D27-83 (#30) - D27-109 (E01) Power switch on (IG) 11 to 14 V D27-82 (#40) - D27-109 (E01) Power switch on (IG) 11 to 14 V TEXT IN ILLUSTRATION *a Front view of wire harness connector (to ECM) NG --> See step 16 OK: Go to next step
11. CHECK FUEL INJECTOR ASSEMBLY OF IMBALANCE CYLINDER Check the fuel injector injection [whether fuel volume is high or low, and whether injection pattern is poor]. Refer to «INSPECTION»(/toyota/prius-v/i-2011-2014/remont/fuel-system/#fuel-system-service-information) . NG --> See step 17 OK: Go to next step
12. CHECK FOR CAUSE OF FAILURE If the diagnosis procedure has been performed and the malfunctioning part cannot be determined, perform the following inspection. Check for deposits on the intake valve. HINT: The DTC may have been stored due to deposits that have accumulated in the intake valve. Therefore, remove the cylinder head and inspect the intake valve. Check for deposits in the EGR delivery chamber. HINT: The DTC may have been stored due to deposits that have accumulated in the EGR delivery chamber. Therefore, remove and inspect the EGR delivery chamber. NEXT: Go to next step
13. CONFIRM WHETHER MALFUNCTION HAS BEEN SUCCESSFULLY REPAIRED Connect the Techstream to the DLC3. Turn the power switch on (IG). Turn the Techstream on. Clear the DTCs. Refer to «DTC CHECK / CLEAR»(/toyota/prius-v/i-2011-2014/remont/testing-diagnostics/#engine-control-system-diagnostics-introduction__dtc-check-clear) . Drive the vehicle in accordance with the driving pattern described in the Confirmation Driving Pattern. Enter the following menus: Powertrain / Engine and ECT / Trouble Codes. Check for DTCs. Result P219A is not output. NEXT --> END
14. GO TO DTC CHART. Refer to «DIAGNOSTIC TROUBLE CODE CHART»(/toyota/prius-v/i-2011-2014/remont/testing-diagnostics/#engine-control-system-diagnostics-introduction__diagnostic-trouble-code-chart)
15. REPLACE SPARK PLUG. Refer to «REMOVAL - Step 6»(/toyota/prius-v/i-2011-2014/remont/testing-diagnostics/#engine-control-system-service-information)
16. GO TO FUEL INJECTOR CIRCUIT. Refer to «Fuel Injector Circuit»(/toyota/prius-v/i-2011-2014/remont/testing-diagnostics/#engine-control-system-diagnostic-codes-circuit-tests)
17. REPLACE FUEL INJECTOR ASSEMBLY. Refer to «REMOVAL»(/toyota/prius-v/i-2011-2014/remont/fuel-system/#fuel-system-service-information)

Refer to DTC P2195. Refer to DESCRIPTION .

These DTCs are output when there is an open or short in the air fuel ratio sensor circuit, or if air fuel ratio sensor output drops.

To detect these problems, the voltage of the air fuel ratio sensor is monitored when turning the power switch on (IG), and the admittance (admittance is an electrical term that indicates the ease of flow of current) is checked while driving. If the voltage of the air fuel ratio sensor is between 0.5 V and 4.5 V, it is considered normal. If the voltage is outside of the specified range, or the admittance is below the standard value, the ECM will determine that there is a malfunction in the air fuel ratio sensor. If the same malfunction is detected in the next driving cycle, the MIL is illuminated and a DTC is stored.

The air fuel ratio sensor varies its output voltage in proportion to the air-fuel ratio. If the air fuel ratio sensor impedance (alternating current resistance) or output voltage deviates greatly from the standard range, the ECM determines that there is an open or short in the air fuel ratio sensor circuit.

P2237 AND P2238

P2239, P2252 AND P2253

P2237: AIR FUEL RATIO SENSOR (SENSOR 1) OPEN CIRCUIT BETWEEN A1A+ AND A1A

P2238: AIR FUEL RATIO SENSOR (SENSOR 1) LOW IMPEDANCE

P2238: AIR FUEL RATIO SENSOR (SENSOR 1) SHORT CIRCUIT BETWEEN A1A+ AND GND

P2239: AIR FUEL RATIO SENSOR (SENSOR 1) SHORT CIRCUIT BETWEEN A1A+ AND +B

P2252: AIR FUEL RATIO SENSOR (SENSOR 1) SHORT CIRCUIT BETWEEN A1A- AND GND

P2253: AIR FUEL RATIO SENSOR (SENSOR 1) SHORT CIRCUIT BETWEEN A1A- AND +B

P2238: AIR FUEL RATIO SENSOR (SENSOR 1) SHORT CIRCUIT BETWEEN A1A+ AND A1A

P2237: AIR FUEL RATIO SENSOR (SENSOR 1) OPEN CIRCUIT BETWEEN A1A+ AND A1A

P2238: AIR FUEL RATIO SENSOR (SENSOR 1) LOW IMPEDANCE

P2238: AIR FUEL RATIO SENSOR (SENSOR 1) SHORT CIRCUIT BETWEEN A1A+ AND GND

P2239: AIR FUEL RATIO SENSOR (SENSOR 1) SHORT CIRCUIT BETWEEN A1A+ AND +B

P2252: AIR FUEL RATIO SENSOR (SENSOR 1) SHORT CIRCUIT BETWEEN A1A- AND GND

P2253: AIR FUEL RATIO SENSOR (SENSOR 1) SHORT CIRCUIT BETWEEN A1A- AND +B

P2238: AIR FUEL RATIO SENSOR (SENSOR 1) SHORT CIRCUIT BETWEEN A1A+ AND A1A

1. Connect the Techstream to the DLC3.
2. Turn the power switch on (IG) and turn the Techstream on.
3. Clear the DTCs (even if no DTCs are stored, perform the clear DTC procedure). Refer to «DTC CHECK / CLEAR»(/toyota/prius-v/i-2011-2014/remont/testing-diagnostics/#engine-control-system-diagnostics-introduction__dtc-check-clear) .
4. Turn the power switch off and wait for 30 seconds.
5. Turn the power switch on (IG) and turn the Techstream on.
6. Put the engine in inspection mode (maintenance mode). Refer to «INSPECTION MODE PROCEDURE»(/toyota/prius-v/i-2011-2014/remont/hoistjack/#introduction) .
7. Start the engine and wait 5 minutes.
8. Enter the following menus: Powertrain / Engine and ECT / Trouble Codes.
9. Read the pending DTCs. HINT: If a pending DTC is output, the system is malfunctioning. If a pending DTC is not output, perform the following procedure.
10. Enter the following menus: Powertrain / Engine and ECT / Utility / All Readiness.
11. Input the DTC: P2237, P2238, P2239, P2252 or P2253.
12. Check the DTC judgment result. Techstream Display Description NORMAL DTC judgment completed System normal ABNORMAL DTC judgment completed System abnormal INCOMPLETE DTC judgment not completed Perform driving pattern after confirming DTC enabling conditions N/A Unable to perform DTC judgment Number of DTCs which do not fulfill DTC preconditions has reached ECU memory limit HINT: If the judgment result shows NORMAL, the system is normal. If the judgment result shows ABNORMAL, the system has a malfunction. If the judgment result shows INCOMPLETE or N/A, idle the engine for 5 minutes and check the DTC judgment result again.
13. If no pending DTC is output, perform a universal trip and check for permanent DTCs. Refer to «DTC CHECK / CLEAR»(/toyota/prius-v/i-2011-2014/remont/testing-diagnostics/#engine-control-system-diagnostics-introduction__dtc-check-clear) . HINT: If a permanent DTC is output, the system is malfunctioning. If no permanent DTC is output, the system is normal.

Refer to DTC P2195. Refer to WIRING DIAGRAM .

Note. Inspect the fuses for circuits related to this system before performing the following inspection procedure.

HINT

1. Refer to "Data List / Active Test" [AFS Voltage B1S1]. Refer to «DATA LIST / ACTIVE TEST»(/toyota/prius-v/i-2011-2014/remont/testing-diagnostics/#engine-control-system-diagnostics-introduction) .
2. Read freeze frame data using the Techstream. The ECM records vehicle and driving condition information as freeze frame data the moment a DTC is stored. When troubleshooting, freeze frame data can help determine if the vehicle was moving or stationary, if the engine was warmed up or not, if the air fuel ratio was lean or rich, and other data from the time the malfunction occurred.
3. Sensor 1 refers to the sensor closest to the engine assembly.
4. Sensor 2 refers to the sensor farthest away from the engine assembly.

1. CHECK HARNESS AND CONNECTOR (AIR FUEL RATIO SENSOR - ECM) Disconnect the air fuel ratio sensor connector. Disconnect the ECM connector. Measure the resistance according to the value(s) in the table below. Standard Resistance Tester Connection Condition Specified Condition D24-1 (HA1A) - D28-18 (HA1A) Always Below 1 ohms D24-3 (A1A+) - D28-103 (A1A+) Always Below 1 ohms D24-4 (A1A-) - D28-126 (A1A-) Always Below 1 ohms D24-1 (HA1A) or D28-18 (HA1A) - Body ground Always 10 kohms or higher D24-3 (A1A+) or D28-103 (A1A+) - Body ground Always 10 kohms or higher D24-4 (A1A-) or D28-126 (A1A-) - Body ground Always 10 kohms or higher NG --> REPAIR OR REPLACE HARNESS OR CONNECTOR OK: Go to next step
2. REPLACE AIR FUEL RATIO SENSOR Replace the air fuel ratio sensor. Refer to «REMOVAL»(/toyota/prius-v/i-2011-2014/remont/testing-diagnostics/#engine-control-system-service-information) . NEXT: Go to next step
3. CHECK WHETHER DTC OUTPUT RECURS Connect the Techstream to the DLC3. Turn the power switch on (IG). Turn the Techstream on. Clear the DTCs. Refer to «DTC CHECK / CLEAR»(/toyota/prius-v/i-2011-2014/remont/testing-diagnostics/#engine-control-system-diagnostics-introduction__dtc-check-clear) . Drive the vehicle referring to the Confirmation Driving Pattern. Enter the following menus: Powertrain / Engine and ECT / Trouble Codes / Pending. Read the Pending DTCs. RESULT Result Proceed to DTC is not output A DTC P2237, P2238, P2239, P2252 or P2253 is output B B --> See step 4 A --> END
4. REPLACE ECM. Refer to «REMOVAL»(/toyota/prius-v/i-2011-2014/remont/testing-diagnostics/#engine-control-system-service-information)

HINT

The vent valve is built into the canister pump module.

The description can be found in the EVAP (Evaporative Emission) System. Refer to DESCRIPTION .

5 hours*1 after the power switch is turned off, the leak detection pump creates negative pressure (vacuum) in the EVAP (Evaporative Emission) system. The ECM monitors for leaks and actuator malfunctions based on the EVAP pressure.

HINT

*1: If the engine coolant temperature is not below 35°C (95°F) 5 hours after the power switch is turned off, the monitor check starts 2 hours later. If it is still not below 35°C (95°F) 7 hours after the power switch is turned off, the monitor check starts 2.5 hours later.

*2: If only a small amount of fuel is in the fuel tank, it takes longer for the EVAP pressure to stabilize.

TEXT IN ILLUSTRATION

P2420: Vent valve stuck open (vent)

In operation C, the vent valve turns on (closed) and the EVAP system pressure is then measured by the ECM using the canister pressure sensor to conduct an EVAP leak check. If the pressure does not increase when the vent valve is open, the ECM interprets this as the vent valve being stuck open. The ECM illuminates the MIL and stores the DTC.

Scheme 70

Refer to EVAP System. Refer to MONITOR RESULT .

Note. The Evaporative System Check (Automatic Mode) consists of 6 steps performed automatically by the Techstream. It takes a maximum of approximately 24 minutes. Do not perform the Evaporative System Check when the fuel tank is more than 90% full because the cut-off valve may be closed, making the fuel tank leak check unavailable. Do not run the engine during this operation. When the temperature of the fuel is 35°C (95°F) or higher, a large amount of vapor forms and any check results become inaccurate. When performing the Evaporative System Check, keep the fuel temperature below 35°C (95°F).

1. Connect the Techstream to the DLC3.
2. Turn the power switch on (IG) and turn the Techstream on.
3. Clear the DTCs (even if no DTCs are stored, perform the clear DTC procedure). Refer to «DTC CHECK / CLEAR»(/toyota/prius-v/i-2011-2014/remont/testing-diagnostics/#engine-control-system-diagnostics-introduction__dtc-check-clear) .
4. Turn the power switch off and wait for 30 seconds.
5. Turn the power switch on (IG) and turn the Techstream on.
6. Enter the following menus: Powertrain / Engine and ECT / Utility / Evaporative System Check / Automatic Mode.
7. After the "Evaporative System Check" is completed, check for All Readiness by entering the following menus: Powertrain / Engine and ECT / Utility / All Readiness.
8. Input the DTC: P2420.
9. Check the DTC judgment result. Techstream Display Description NORMAL DTC judgment completed System normal ABNORMAL DTC judgment completed System abnormal INCOMPLETE DTC judgment not completed Perform driving pattern after confirming DTC enabling conditions N/A Unable to perform DTC judgment Number of DTCs which do not fulfill DTC preconditions has reached ECU memory limit HINT: If the judgment result shows NORMAL, the system is normal. If the judgment result shows ABNORMAL, the system has a malfunction.
10. If the judgment result is INCOMPLETE or N/A and no pending DTC is output, perform a universal trip and check for permanent DTCs. Refer to «DTC CHECK / CLEAR»(/toyota/prius-v/i-2011-2014/remont/testing-diagnostics/#engine-control-system-diagnostics-introduction__dtc-check-clear) . HINT: If a permanent DTC is output, the system is malfunctioning. If no permanent DTC is output, the system is normal.

Refer to the EVAP System. Refer to INSPECTION PROCEDURE .

The soak timer operates after the power switch is turned off. When a certain amount of time has elapsed after turning the power switch off, the soak timer activates the ECM to perform malfunction checks witch can only be performed after the engine is stopped. The soak timer is built into the ECM.

Scheme 71

If the soak timer activates the ECM even though only a short amount of time has elapsed since the power switch was turned off, or if the soak timer does not activate the ECM even though a considerable amount of time has elapsed since the power switch was turned off, the ECM determines that the soak timer is malfunctioning, illuminates the MIL and stores a DTC the next time the power switch is turned on (IG).

While the engine is running, the ECM monitors the synchronization of the soak timer and the CPU clock. If these two are not synchronized, the ECM interprets this as a malfunction, illuminates the MIL and stores the DTC (2 trip detection logic).

ALL

CASE 1

CASE 2

CASE 3

CASE 1

CASE 2

CASE 3

1. Connect the Techstream to the DLC3.
2. Turn the power switch on (IG) and turn the Techstream on.
3. Clear the DTCs (even if no DTCs are stored, perform the clear DTC procedure). Refer to «DTC CHECK / CLEAR»(/toyota/prius-v/i-2011-2014/remont/testing-diagnostics/#engine-control-system-diagnostics-introduction__dtc-check-clear) .
4. Turn the power switch off and wait for 30 seconds.
5. Turn the power switch on (IG) and turn the Techstream on.
6. Put the engine in inspection mode (maintenance mode). Refer to «INSPECTION MODE PROCEDURE»(/toyota/prius-v/i-2011-2014/remont/hoistjack/#introduction) .
7. Start the engine.
8. Idle the engine for 10 minutes or more.
9. Enter the following menus: Powertrain / Engine and ECT / Trouble Codes.
10. Read the pending DTCs. HINT: If a pending DTC is output, the system is malfunctioning. If a pending DTC is not output, perform the following procedure.
11. Enter the following menus: Powertrain / Engine and ECT / Utility / All Readiness.
12. Input the DTC: P2610.
13. Check the DTC judgment result. Techstream Display Description NORMAL DTC judgment completed System normal ABNORMAL DTC judgment completed System abnormal INCOMPLETE DTC judgment not completed Perform driving pattern after confirming DTC enabling conditions N/A Unable to perform DTC judgment Number of DTCs which do not fulfill DTC preconditions has reached ECU memory limit HINT: If the judgment result shows NORMAL, the system is normal. If the judgment result shows ABNORMAL, the system has a malfunction.
14. If the judgment result is INCOMPLETE or N/A and no pending DTC is output, perform a universal trip and check for permanent DTCs. Refer to «DTC CHECK / CLEAR»(/toyota/prius-v/i-2011-2014/remont/testing-diagnostics/#engine-control-system-diagnostics-introduction__dtc-check-clear) . HINT: If a permanent DTC is output, the system is malfunctioning. If no permanent DTC is output, the system is normal.

HINT

1. DTC P2610 is output if an internal ECM problem is detected. Diagnostic procedures are not required. ECM replacement is required.
2. Read freeze frame data using the Techstream. The ECM records vehicle and driving condition information as freeze frame data the moment a DTC is stored. When troubleshooting, freeze frame data can help determine if the vehicle was moving or stationary, if the engine was warmed up or not, if the air fuel ratio was lean or rich, and other data from the time the malfunction occurred.

1. REPLACE ECM Replace the ECM. Refer to «REMOVAL»(/toyota/prius-v/i-2011-2014/remont/testing-diagnostics/#engine-control-system-service-information) . NEXT: Go to next step
2. CHECK WHETHER DTC OUTPUT RECURS (DTC P2610) Connect the Techstream to the DLC3. Turn the power switch on (IG). Turn the Techstream on. Clear the DTCs. Refer to «DTC CHECK / CLEAR»(/toyota/prius-v/i-2011-2014/remont/testing-diagnostics/#engine-control-system-diagnostics-introduction__dtc-check-clear) . Put the engine in inspection mode (maintenance mode). Refer to «INSPECTION MODE PROCEDURE»(/toyota/prius-v/i-2011-2014/remont/hoistjack/#introduction) . Start the engine and wait for 10 minutes or more. Enter the following menus: Powertrain / Engine and ECT / Trouble Codes / Pending. If no pending DTC is displayed, the repair has been successfully completed. NEXT --> END

The ECM controls the engine water pump assembly by calculating the necessary amount of coolant flow based on engine coolant temperature, engine speed and vehicle speed information. The speed of the engine water pump assembly is controlled steplessly using a duty cycle signal sent from the ECM. This optimal control enhances warm-up performance and reduces cooling losses, thus reducing the specific fuel consumption of the engine.

The ECM calculates the speed of the engine water pump assembly using a duty cycle signal sent from the engine water pump assembly. When the speed of the engine water pump assembly becomes less than 900 RPM while it is operating, the ECM detects the malfunction and stores DTC P261B.

The engine water pump assembly operates steplessly based on a duty cycle signal sent from the ECM. If actual drive duty cycle ratio does not correspond to the target drive duty cycle of the engine water pump assembly, the ECM detects the malfunction.

ALL

P261B: ENGINE WATER PUMP CIRCUIT PERFORMANCE

P261C AND P261D: ENGINE WATER PUMP CIRCUIT RANGE CHECK (LOW VOLTAGE, HIGH VOLTAGE)

P261B: ENGINE WATER PUMP CIRCUIT PERFORMANCE

P261C: ENGINE WATER PUMP CIRCUIT RANGE CHECK (LOW VOLTAGE)

P261D: ENGINE WATER PUMP CIRCUIT RANGE CHECK (HIGH VOLTAGE)

P261B: ENGINE WATER PUMP CIRCUIT PERFORMANCE

P261C AND P261D: ENGINE WATER PUMP CIRCUIT RANGE CHECK (LOW VOLTAGE, HIGH VOLTAGE)

1. Connect the Techstream to the DLC3.
2. Turn the power switch on (IG) and turn the Techstream on.
3. Clear the DTCs (even if no DTCs are stored, perform the clear DTC procedure). Refer to «DTC CHECK / CLEAR»(/toyota/prius-v/i-2011-2014/remont/testing-diagnostics/#engine-control-system-diagnostics-introduction__dtc-check-clear) .
4. Turn the power switch off and wait for 30 seconds.
5. Turn the power switch on (IG) and turn the Techstream on.
6. Put the engine in inspection mode (maintenance mode). Refer to «INSPECTION MODE PROCEDURE»(/toyota/prius-v/i-2011-2014/remont/hoistjack/#introduction) .
7. Start the engine and warm it up (until the engine coolant temperature is 75°C (167°F) or higher).
8. Idle the engine for 20 seconds or more [A].
9. Enter the following menus: Powertrain / Engine and ECT / Trouble Codes [B].
10. Read the pending DTCs. HINT: If a pending DTC is output, the system is malfunctioning. If a pending DTC is not output, perform the following procedure.
11. Enter the following menus: Powertrain / Engine and ECT / Utility / All Readiness.
12. Input the DTC: P261B, P261C or P261D.
13. Check the DTC judgment result. Techstream Display Description NORMAL DTC judgment completed System normal ABNORMAL DTC judgment completed System abnormal INCOMPLETE DTC judgment not completed Perform driving pattern after confirming DTC enabling conditions N/A Unable to perform DTC judgment Number of DTCs which do not fulfill DTC preconditions has reached ECU memory limit HINT: If the judgment result shows NORMAL, the system is normal. If the judgment result shows ABNORMAL, the system has a malfunction. If the judgment result shows INCOMPLETE or N/A, perform steps [A] and [B] again.
14. If no pending DTC is output, perform a universal trip and check for permanent DTCs. Refer to «DTC CHECK / CLEAR»(/toyota/prius-v/i-2011-2014/remont/testing-diagnostics/#engine-control-system-diagnostics-introduction__dtc-check-clear) . HINT: If a permanent DTC is output, the system is malfunctioning. If no permanent DTC is output, the system is normal.

Scheme 72

Note. Inspect the fuses for circuits related to this system before performing the following inspection procedure.

HINT

Read freeze frame data using the Techstream. The ECM records vehicle and driving condition information as freeze frame data the moment a DTC is stored. When troubleshooting, freeze frame data can be helpful in determining whether the vehicle was running or stopped, whether the engine was warmed up or not, whether the air fuel ratio was lean or rich, as well as other data recorded at the time of a malfunction.

Scheme 73

Scheme 74

Scheme 75

Scheme 76

1. PERFORM ACTIVE TEST USING TECHSTREAM (ACTIVATE THE ELECTRIC WATER PUMP) Connect the Techstream to the DLC3. Turn the power switch on (IG). Turn the Techstream on. Enter the following menus: Powertrain / Engine and ECT / Active Test / Activate the Electric Water Pump. Touch the engine water pump and check that the pump assembly is operating (vibrating). OK The engine water pump assembly is operating (vibrating). NG --> See step 5 OK: Go to next step
2. CHECK HARNESS AND CONNECTOR (ENGINE WATER PUMP ASSEMBLY - ECM) HINT: Confirm a good connection at the engine water pump assembly and ECM connectors. Disconnect the engine water pump assembly connector. Disconnect the ECM connector. Measure the resistance according to the value(s) in the table below. Standard Resistance Tester Connection Condition Specified Condition D13-2 (NWP) - A57-11 (WPI) Always Below 1 ohms D13-4 (SWP) - A57-10 (WPO) Always Below 1 ohms D13-2 (NWP) or A57-11 (WPI) - Body ground Always 10 kohms or higher D13-4 (SWP) or A57-10 (WPO) - Body ground Always 10 kohms or higher NG --> REPAIR OR REPLACE HARNESS OR CONNECTOR OK: Go to next step
3. CHECK ECM (WPI VOLTAGE) Disconnect the engine water pump assembly connector. Turn the power switch on (IG). Measure the voltage according to the value(s) in the table below. Standard Voltage Tester Connection Condition Specified Condition D13-2 (NWP) - Body ground Power switch on (IG) 11 to 14 V TEXT IN ILLUSTRATION *a Front view of wire harness connector (to Engine Water Pump Assembly) NG --> See step 15 OK --> See step 4
4. REPLACE ENGINE WATER PUMP ASSEMBLY. Refer to «REMOVAL»(/toyota/prius-v/i-2011-2014/remont/cooling-fan/#engine-cooling-system-service-information)
5. CHECK TERMINAL VOLTAGE (ENGINE WATER PUMP ASSEMBLY) HINT: Confirm a good connection at the engine water pump assembly and ECM connectors. Disconnect the engine water pump assembly connector. Turn the power switch on (IG). Measure the voltage according to the value(s) in the table below. Standard Voltage Tester Connection Condition Specified Condition D13-1 (+B) - Body ground Power switch on (IG) 11 to 14 V TEXT IN ILLUSTRATION *a Front view of wire harness connector (to Engine Water Pump Assembly) NG --> See step 11 OK: Go to next step
6. CHECK HARNESS AND CONNECTOR (ENGINE WATER PUMP ASSEMBLY - BODY GROUND) Disconnect the engine water pump assembly connector. Measure the resistance according to the value(s) in the table below. Standard Resistance Tester Connection Condition Specified Condition D13-5 (PGND) - Body ground Always Below 1 ohms NG --> REPAIR OR REPLACE HARNESS OR CONNECTOR OK: Go to next step
7. CHECK HARNESS AND CONNECTOR (ENGINE WATER PUMP ASSEMBLY - ECM) Disconnect the engine water pump assembly connector. Disconnect the ECM connector. Measure the resistance according to the value(s) in the table below. Standard Resistance Tester Connection Condition Specified Condition D13-2 (NWP) - A57-11 (WPI) Always Below 1 ohms D13-4 (SWP) - A57-10 (WPO) Always Below 1 ohms D13-2 (NWP) or A57-11 (WPI) - Body ground Always 10 kohms or higher D13-4 (SWP) or A57-10 (WPO) - Body ground Always 10 kohms or higher NG --> REPAIR OR REPLACE HARNESS OR CONNECTOR OK: Go to next step
8. REPLACE ENGINE WATER PUMP ASSEMBLY Replace the engine water pump assembly. Refer to «REMOVAL»(/toyota/prius-v/i-2011-2014/remont/cooling-fan/#engine-cooling-system-service-information) . NEXT: Go to next step
9. CHECK WHETHER DTC OUTPUT RECURS (DTC P261B, P261C OR P261D) Connect the Techstream to the DLC3. Turn the power switch on (IG). Turn the Techstream on. Clear the DTCs. Refer to «DTC CHECK / CLEAR»(/toyota/prius-v/i-2011-2014/remont/testing-diagnostics/#engine-control-system-diagnostics-introduction__dtc-check-clear) Drive the vehicle in accordance with the driving pattern described in the Confirmation Driving Pattern. Enter the following menus: Powertrain / Engine and ECT / Trouble codes. Read the DTCs. RESULT Result Proceed to DTC P261B, P261C or P261D is output A DTC is not output B B --> END A --> See step 10
10. REPLACE ECM. Refer to «REMOVAL»(/toyota/prius-v/i-2011-2014/remont/testing-diagnostics/#engine-control-system-service-information)
11. INSPECT ENG W/P RELAY Remove the ENG W/P relay from the engine room relay block and junction block assembly. Measure the resistance according to the value(s) in the table below. Standard Resistance Tester Connection Condition Specified Condition 3 - 5 No auxiliary battery voltage applied between terminals 1 and 2 10 kohms or higher 3 - 5 Auxiliary battery voltage applied between terminals 1 and 2 Below 1 ohms NG --> REPLACE ENG W/P RELAY OK: Go to next step
12. CHECK HARNESS AND CONNECTOR (ENG W/P RELAY - ENGINE WATER PUMP ASSEMBLY) Remove the ENG W/P relay from the engine room relay block and junction block assembly. Disconnect the engine water pump assembly connector. Measure the resistance according to the value(s) in the table below. Standard Resistance Tester Connection Condition Specified Condition ENG W/P relay terminal 5 - D13-1 (+B) Always Below 1 ohms ENG W/P relay terminal 5 or D13-1 (+B) - Body ground Always 10 kohms or higher NG --> REPAIR OR REPLACE HARNESS OR CONNECTOR OK: Go to next step
13. CHECK ENG W/P RELAY (POWER SOURCE) Remove the ENG W/P relay from the engine room relay block and junction block assembly. Measure the voltage according to the value(s) in the table below. Standard Voltage Tester Connection Condition Specified Condition ENG W/P relay terminal 3 - Body ground Always 11 to 14 V TEXT IN ILLUSTRATION *1 Engine Room Relay Block and Junction Block Assembly *2 ENG W/P Relay NG --> REPAIR OR REPLACE HARNESS OR CONNECTOR OK: Go to next step
14. CHECK HARNESS AND CONNECTOR (ENG W/P RELAY - BODY GROUND) Remove the ENG W/P relay from the engine room relay block and junction block assembly. Measure the resistance according to the value(s) in the table below. Standard Resistance Tester Connection Condition Specified Condition ENG W/P relay terminal 1 - Body ground Always Below 1 ohms NG --> REPAIR OR REPLACE HARNESS OR CONNECTOR OK --> REPAIR OR REPLACE HARNESS OR CONNECTOR (ENG W/P RELAY - EFI MAIN RELAY)
15. REPLACE ECM. Refer to «REMOVAL»(/toyota/prius-v/i-2011-2014/remont/testing-diagnostics/#engine-control-system-service-information)

From the power management control ECU, the ECM receives data such as power output required for the engine (required output), estimated torque produced by the engine (estimated torque), engine speed of control target (target speed), and whether the engine is in start mode or not. Then, based on the required output and target speed, the ECM calculates a target torque that is to be produced by the engine and compares it with the estimated torque. If the estimated torque is very low compared with the target torque, or the engine start mode continues for the specific duration calculated by the coolant temperature, an abnormal condition is detected.

The ECM and power management control ECU are connected using CAN communication. The ECM sends engine speed data and other data to the power management control ECU while the power management control ECU sends information such as a requirement for engine power to the ECM using CAN communication. When the communication between the ECM and power management control ECU is normal and the following items meet the specified conditions, the ECM illuminates the MIL and stores a DTC.

1. Engine speed
2. Target torque
3. Ratio of target torque against estimated torque
4. Fuel level

P3190

P3191

HINT

1. Repeating this inspection for symptom confirmation may cause the SOC to drop, preventing the system from entering the READY-on state. In this case, use the THS charger to charge the HV battery.
2. Cranking the engine once causes the SOC to drop approximately 1%.
3. Charging the HV battery once (10 minutes) using the THS charger restores the SOC approximately 2%.
4. Charging the HV battery using the THS charger takes approximately 10 minutes when the battery temperature is 25°C (77°F) or approximately 30 minutes when the battery temperature is 0°C (32°F).
5. The THS charger is a supplemental charging device that charges the HV battery enough to enable the engine to start (the vehicle can enter the READY-on state).
6. Read freeze frame data using the Techstream. The ECM records vehicle and driving condition information as freeze frame data the moment a DTC is stored. When troubleshooting, freeze frame data can be helpful in determining whether the vehicle was running or stopped, whether the engine was warmed up or not, whether the air-fuel ratio was lean or rich, as well as other data recorded at the time of a malfunction.

1. CHECK ANY OTHER DTCS OUTPUT (IN ADDITION TO DTC P3190, P3191 AND/OR P3193) Connect the Techstream to the DLC3. Turn the power switch on (IG). Turn the Techstream on. Enter the following menus: Powertrain / Engine and ECT / Trouble Codes. Read the DTCs. RESULT Result Proceed to DTC P3190, P3191 and/or P3193 are output A DTC P3190, P3191 and/or P3193 and other DTCs are output B HINT: If any other codes besides P3190, P3191 and/or P3193 are output, perform troubleshooting for those DTCs first. B --> See step 18 A: Go to next step
2. CHECK SHORTAGE OF FUEL Check the amount of fuel remaining. OK There is enough fuel. HINT: DTCs P3190, P3191 and/or P3193 may be output if the vehicle run out of fuel in the past. When an insufficient amount of fuel is added to the vehicle and when the hybrid control system will not engage because the DTCs P3190, P3191 and/or P3193 that are output regard the vehicle as out of fuel, continue refueling the vehicle until the fuel level warning light turns off. NG --> REFILL FUEL OK: Go to next step
3. CHECK INTAKE SYSTEM Check the intake system for vacuum leaks. Refer to «ON-VEHICLE INSPECTION»(/toyota/prius-v/i-2011-2014/remont/mechanical/#engine-intake-system-inspection) . OK No leaks in intake system. NG --> REPAIR OR REPLACE INTAKE SYSTEM OK: Go to next step
4. CHECK FOR UNUSUAL NOISE OR VIBRATION WHEN STARTING ENGINE OR REVVING UP OK Unusual noise and vibration do not occur. NG --> REPAIR OR REPLACE MALFUNCTIONING PART OK: Go to next step
5. CHECK FUEL PRESSURE Check the fuel pressure. Refer to «ON-VEHICLE INSPECTION - Step 2»(/toyota/prius-v/i-2011-2014/remont/fuel-system/#fuel-system-inspection) . NG --> See step 17 OK: Go to next step
6. INSPECT FREEZE FRAME DATA Connect the Techstream to the DLC3. Turn the power switch on (IG). Turn the Techstream on. Enter the following menus: Powertrain / Engine and ECT Trouble Codes / Freeze Frame Data. Calculate the requested torque* and compare it with Actual Engine Torque. HINT: *: The requested torque is calculated by putting "Requested Engine Torque" and "HV Target Engine Speed" from the freeze frame data into the following formula: Requested torque = Requested Engine Torque (kW) / HV Target Engine Speed (RPM) x 9554 Standard Actual Engine Torque is 60% or more of the request torque. RESULT Result Proceed to NG A OK B B --> See step 8 A: Go to next step
7. INSPECT THROTTLE BODY ASSEMBLY Inspect the throttle body assembly. Refer to «INSPECTION»(/toyota/prius-v/i-2011-2014/remont/testing-diagnostics/#engine-control-system-service-information) . NG --> See step 22 OK: Go to next step
8. INSPECT MASS AIR FLOW METER SUB-ASSEMBLY Inspect the mass air flow meter sub-assembly. Refer to «INSPECTION»(/toyota/prius-v/i-2011-2014/remont/testing-diagnostics/#engine-control-system-service-information) . NG --> See step 19 OK: Go to next step
9. INSPECT ENGINE COOLANT TEMPERATURE SENSOR Inspect the engine coolant temperature sensor. Refer to «INSPECTION»(/toyota/prius-v/i-2011-2014/remont/testing-diagnostics/#engine-control-system-service-information) . NG --> See step 20 OK: Go to next step
10. INSPECT CRANKSHAFT POSITION SENSOR Inspect the crankshaft position sensor. Refer to «INSPECTION»(/toyota/prius-v/i-2011-2014/remont/testing-diagnostics/#engine-control-system-service-information) . NG --> See step 21 OK: Go to next step
11. REPLACE CAMSHAFT POSITION SENSOR Replace the camshaft position sensor. Refer to «REMOVAL»(/toyota/prius-v/i-2011-2014/remont/testing-diagnostics/#engine-control-system-service-information) . NEXT: Go to next step
12. CHECK WHETHER DTC OUTPUT RECURS (DTC P3190, P3191 OR P3193) Connect the Techstream to the DLC3. Turn the power switch on (IG). Turn the Techstream on. Clear the DTCs. Refer to «DTC CHECK / CLEAR»(/toyota/prius-v/i-2011-2014/remont/testing-diagnostics/#engine-control-system-diagnostics-introduction__dtc-check-clear) . Turn the power switch off. Turn the power switch on (IG) and turn the Techstream on. Put the engine in inspection mode (maintenance mode). Refer to «INSPECTION MODE PROCEDURE»(/toyota/prius-v/i-2011-2014/remont/hoistjack/#introduction) . Start the engine. Allow the engine to idle for 10 seconds or more. Enter the following menus: Powertrain / Engine and ECT / Trouble Codes / Pending. Read the pending DTCs. RESULT Result Proceed to DTC P3190, P3191 or P3193 is output A DTC is not output B B --> END A: Go to next step
13. PERFORM ACTIVE TEST USING TECHSTREAM (CONTROL THE EGR STEP POSITION) Connect the Techstream to the DLC3. Turn the power switch on (IG). Turn the Techstream on. Put the engine in inspection mode (maintenance mode). Refer to «INSPECTION MODE PROCEDURE»(/toyota/prius-v/i-2011-2014/remont/hoistjack/#introduction) . Start the engine and warm it up until the engine coolant temperature reaches 75°C (167°F) or higher. HINT: The A/C switch and all accessory switches should be off. Enter the following menus: Powertrain / Engine and ECT / Active Test / Control the EGR Step Position / Data List / Primary / MAP. Check the engine idling condition and MAP values in the Data List while performing the Active Test. HINT: Do not leave the EGR valve open for 10 seconds or more during the Active Test. Be sure to return the EGR valve to step 0 when the Active Test is completed. Do not open the EGR valve 30 steps or more during the Active Test. OK MAP and idling condition change in response to EGR step position. Standard - EGR Step Position (Active Test) 0 Steps 0 to 30 Steps Idling condition Steady idling Idling changes from steady to rough idling or engine stalls MAP (Data List) MAP value is 20 to 40 kPa (150 to 300 mmHg) (EGR valve is fully closed) MAP value is at least +10 kPa (75 mmHg) higher than when EGR valve is fully closed HINT: During Active Test, if the idling condition does not change in response to EGR step position, then there is probably a malfunction in the EGR valve. Result Result Proceed to Outside of standard range A Within standard range B B --> See step 15 A: Go to next step
14. INSPECT EGR VALVE ASSEMBLY Remove the EGR valve assembly. Refer to «REMOVAL»(/toyota/prius-v/i-2011-2014/remont/auxiliary-emission-control-systems/#emission-control-system-service-information) . Check if the EGR valve is stuck open. OK EGR valve is tightly closed. NG --> See step 23 OK: Go to next step
15. REPLACE ECM Replace the ECM. Refer to «REMOVAL»(/toyota/prius-v/i-2011-2014/remont/testing-diagnostics/#engine-control-system-service-information) . NEXT: Go to next step
16. CONFIRM WHETHER MALFUNCTION HAS BEEN SUCCESSFULLY REPAIRED Connect the Techstream to the DLC3. Turn the power switch on (IG). Turn the Techstream on. Clear the DTCs. Refer to «DTC CHECK / CLEAR»(/toyota/prius-v/i-2011-2014/remont/testing-diagnostics/#engine-control-system-diagnostics-introduction__dtc-check-clear) . Turn the power switch off and wait for 30 seconds. Turn the power switch on (IG) and turn the Techstream on. Put the engine in inspection mode (maintenance mode). Refer to «INSPECTION MODE PROCEDURE»(/toyota/prius-v/i-2011-2014/remont/hoistjack/#introduction) . Start the engine. Allow the engine to idle for 10 seconds or more. Enter the following menus: Powertrain / Engine and ECT / Utility / All Readiness. Input the DTC: P3190, P3191 or P3193. Check the DTC judgment result. NEXT --> END
17. CHECK FUEL PUMP CONTROL CIRCUIT. Refer to «Fuel Pump Control Circuit»(/toyota/prius-v/i-2011-2014/remont/testing-diagnostics/#engine-control-system-diagnostic-codes-circuit-tests)
18. GO TO DTC CHART. Refer to «DIAGNOSTIC TROUBLE CODE CHART»(/toyota/prius-v/i-2011-2014/remont/testing-diagnostics/#engine-control-system-diagnostics-introduction__diagnostic-trouble-code-chart)
19. REPLACE MASS AIR FLOW METER SUB-ASSEMBLY. Refer to «REMOVAL»(/toyota/prius-v/i-2011-2014/remont/testing-diagnostics/#engine-control-system-service-information)
20. REPLACE ENGINE COOLANT TEMPERATURE SENSOR. Refer to «REMOVAL»(/toyota/prius-v/i-2011-2014/remont/testing-diagnostics/#engine-control-system-service-information)
21. REPLACE CRANKSHAFT POSITION SENSOR. Refer to «REMOVAL»(/toyota/prius-v/i-2011-2014/remont/testing-diagnostics/#engine-control-system-service-information)
22. REPLACE THROTTLE BODY ASSEMBLY. Refer to «REMOVAL»(/toyota/prius-v/i-2011-2014/remont/testing-diagnostics/#engine-control-system-service-information)
23. REPLACE EGR VALVE ASSEMBLY. Refer to «REMOVAL»(/toyota/prius-v/i-2011-2014/remont/auxiliary-emission-control-systems/#emission-control-system-service-information)

The Controller Area Network (CAN) is a serial data communication system for real-time application. It is a multiplex communication system designed for on-vehicle use that provides a superior communication speed of 500 kbps and a capability to detect malfunctions. Through the combination of the CANH and CANL bus lines, the CAN is able to maintain communication based on differential voltage.

1. Connect the Techstream to the DLC3.
2. Turn the power switch on (IG) and turn the Techstream on.
3. Clear the DTCs (even if no DTCs are stored, perform the clear DTC procedure). Refer to «DTC CHECK / CLEAR»(/toyota/prius-v/i-2011-2014/remont/testing-diagnostics/#engine-control-system-diagnostics-introduction__dtc-check-clear) .
4. Turn the power switch off and wait for 30 seconds.
5. Turn the power switch on (IG) and turn the Techstream on.
6. Wait 5 seconds or more.
7. Enter the following menus: Powertrain / Engine and ECT / Trouble Codes.
8. Read the pending DTCs. HINT: If a pending DTC is output, the system is malfunctioning. If a pending DTC is not output, perform the following procedure.
9. Enter the following menus: Powertrain / Engine and ECT / Utility / All Readiness.
10. Input the DTC: U0293.
11. Check the DTC judgment result. Techstream Display Description NORMAL DTC judgment completed System normal ABNORMAL DTC judgment completed System abnormal INCOMPLETE DTC judgment not completed Perform driving pattern after confirming DTC enabling conditions N/A Unable to perform DTC judgment Number of DTCs which do not fulfill DTC preconditions has reached ECU's memory limit HINT: If the judgment result shows NORMAL, the system is normal. If the judgment result shows ABNORMAL, the system has a malfunction.
12. If the judgment result is INCOMPLETE or N/A and no pending DTC is output, perform a universal trip and check for permanent DTCs. Refer to «DTC CHECK / CLEAR»(/toyota/prius-v/i-2011-2014/remont/testing-diagnostics/#engine-control-system-diagnostics-introduction__dtc-check-clear) . HINT: If a permanent DTC is output, the system is malfunctioning. If no permanent DTC is output, the system is normal.

Scheme 77

Refer to the CAN Communication System. Refer to HOW TO PROCEED WITH TROUBLESHOOTING .

HINT

Read freeze frame data using the Techstream. The ECM records vehicle and driving condition information as freeze frame data the moment a DTC is stored. When troubleshooting, freeze frame data can help determine if the vehicle was moving or stationary, if the engine was warmed up or not, if the air fuel ratio was lean or rich, and other data from the time the malfunction occurred.

RELATED DTCS

If any EVAP system DTCs are output, the malfunctioning area can be determined using the table below.

Scheme 78

Note. If the reference pressure difference between the first and second checks is more than the specification, all the DTCs relating to the reference pressure (P043E, P043F, P0441, P0455, P0456, P2401, P2420) will all be stored.

Scheme 79

TEXT IN ILLUSTRATION

HINT

The canister pressure sensor, the leak detection pump and the vent valve are built into the canister pump module.

Scheme 80

TEXT IN ILLUSTRATION

Note. In the EVAP system of this vehicle, turning on the vent valve does not seal off the EVAP system. To check for leaks in the EVAP system, disconnect the air inlet vent hose and apply pressure from atmospheric side of the canister.

While the engine is running, if a predetermined condition (closed-loop, etc.) is met, the purge VSV is opened by the ECM and fuel vapors stored in the canister are purged to the intake manifold. The ECM changes the duty cycle ratio of the purge VSV to control purge flow volume.

The purge flow volume is also determined by the intake manifold pressure. Atmospheric pressure is allowed into the canister through the vent valve to ensure that the purge flow is maintained when negative pressure (vacuum) is applied to the canister.

The following two monitors run to confirm appropriate EVAP system operation.

Scheme 81

Scheme 82

Scheme 83

1. Key-off monitor This monitor checks for EVAP (evaporative emission) system leaks and canister pump module malfunctions. The monitor starts 5 hours* after the power switch is turned off. At least 5 hours are required for the fuel to cool down to stabilize the EVAP pressure, thus making the EVAP system monitor more accurate. The leak detection pump creates negative pressure (vacuum) in the EVAP system and the pressure is measured. Finally, the ECM monitors for leaks from the EVAP system, and malfunctions in both the canister pump module and purge VSV based on the EVAP pressure. HINT: *: If the engine coolant temperature is not below 35°C (95°F) 5 hours after the power switch is turned off, the monitor check starts 2 hours later. If it is still not below 35°C (95°F) 7 hours after the power switch is turned off, the monitor check starts 2.5 hours later.
2. Purge flow monitor The purge flow monitor consists of the 2 monitors. The 1st monitor is conducted every time and the 2nd monitor is activated if necessary. The 1st monitor While the engine is running and the purge VSV (Vacuum Switching Valve) is on (open), the ECM monitors the purge flow by measuring the EVAP pressure change. If negative pressure is not created, the ECM begins the 2nd monitor. The 2nd monitor The vent valve is turned on (closed) and the EVAP pressure is then measured. If the variation in the pressure is less than 0.5 kPa (gauge) [3.75 mmHg] (gauge), the ECM interprets this as the purge VSV being stuck closed, and illuminates the MIL and stores DTC P0441 (2 trip detection logic). Atmospheric pressure check: In order to ensure reliable malfunction detection, the variation between the atmospheric pressures, before and after of the purge flow monitor, is measured by the ECM. TEXT IN ILLUSTRATION *1 ECM *2 Soak Timer *3 Fuel Cap *4 Canister Filter *5 Fuel Tank *6 Canister Pressure Sensor *7 Canister Pump Module *8 Canister *a EVAP Purge Flow *b to Intake Manifold *c Purge VSV: on *d Leak Detection Pump: off *e Reference Orifice (0.02 inch) *f Vent Valve: off Component Operation Canister Contains activated charcoal to absorb EVAP (evaporative emissions) generated in fuel tank. Cut-off valve Located in fuel tank. Valve floats and closes when fuel tank is 100% full. Purge VSV (Vacuum Switching Valve) Opens or closes line between canister and intake manifold. ECM uses purge VSV to control EVAP purge flow. In order to discharge EVAP absorbed by canister to intake manifold, ECM opens purge VSV. EVAP discharge volume to intake manifold controlled by purge VSV duty cycle (current-carrying time) (Open: on; Closed: off). Soak timer Built into ECM. To ensure accurate EVAP monitor, measures 5 hours (+/-15 min) after power switch is turned off. This allows fuel to cool down, stabilizing EVAP pressure. When approximately 5 hours elapsed, ECM activates (Scheme 83) Canister pump module Consists of (a) to (d) below. Canister pump module cannot be disassembled. (a) Vent valve Vents and closes EVAP system. When ECM turns valve on, EVAP system is closed. When ECM turns valve off, EVAP system is vented. Negative pressure (vacuum) is created in EVAP system to check for EVAP leaks by closing purge VSV, turning on vent valve (closing it) and operating leak detection pump (Scheme 82) (b) Canister pressure sensor Indicates pressure as voltage. ECM supplies regulated 5 V to canister pressure sensor, and uses feedback from sensor to monitor EVAP system pressure see scheme 44 (c) Leak detection pump Creates negative pressure (vacuum) in EVAP system for leak check. (d) Reference orifice Has opening with 0.02 inch diameter. Vacuum is produced through orifice by closing purge VSV, turning off vent valve and operating leak detection pump to monitor reference pressure. Reference pressure indicates small leak of EVAP. TEXT IN ILLUSTRATION *1 Canister *2 Reference Orifice (0.02 Inch) *3 Canister Pressure Sensor - - *a Canister Pump Module (Scheme 42) *b Airflow *c Condition: Purge Flow *d Condition: Leak Check *e Vent Valve: Off (vent) *f to Canister Filter (Atmosphere) *g Leak Detection Pump: Off *h Vent Valve: On (closed) *i Leak Detection Pump: On

Refer to DTC P0451. Refer to WIRING DIAGRAM .

Note. Inspect the fuses for circuits related to this system before performing the following inspection procedure. The Techstream is required to conduct the following diagnostic troubleshooting procedure.

HINT

1. Using the Techstream monitor results enables the EVAP (Evaporative Emission) system to be confirmed.
2. Read freeze frame data using the Techstream. The ECM records vehicle and driving condition information as freeze frame data the moment a DTC is stored. When troubleshooting, freeze frame data can help determine if the vehicle was moving or stationary, if the engine was warmed up or not, if the air fuel ratio was lean or rich, and other data from the time the malfunction occurred.

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Scheme 102

1. CONFIRM DTC Turn the power switch off and wait for 10 seconds. Turn the power switch on (IG). Turn the power switch off and wait for 10 seconds. Connect the Techstream to the DLC3. Turn the power switch on (IG) and turn the Techstream on. Enter the following menus: Powertrain / Engine and ECT / Trouble Codes. Confirm DTCs and freeze frame data. If any EVAP system DTCs are stored, the malfunctioning area can be determined using the table below. NOTE: If the reference pressure difference between the first and second checks is more than the specification, all the DTCs relating to the reference pressure (P043E, P043F, P0441, P0455, P0456, P2401, P2420) will all be stored. NEXT: Go to next step
2. PERFORM EVAPORATIVE SYSTEM CHECK (AUTOMATIC MODE) NOTE: The Evaporative System Check (Automatic Mode) consists of 6 steps performed automatically by the Techstream. It takes a maximum of approximately 24 minutes. Do not perform the Evaporative System Check when the fuel tank is higher than 90% full because the cut-off valve may be closed, making the fuel tank leak check unavailable. Do not run the engine during this operation. When the temperature of the fuel is 35°C (95°F) or higher, a large amount of vapor forms and any check results become inaccurate. When performing the Evaporative System Check, keep the temperature below 35°C (95°F). Connect the Techstream to the DLC3. Turn the power switch on (IG). Turn the Techstream on. Clear the DTCs. Refer to «DTC CHECK / CLEAR»(/toyota/prius-v/i-2011-2014/remont/testing-diagnostics/#engine-control-system-diagnostics-introduction__dtc-check-clear) . Enter the following menus: Powertrain / Engine and ECT / Utility / Evaporative System Check / Automatic Mode. After the Evaporative System Check is completed, check for pending DTCs by entering the following menus: Powertrain / Engine and ECT / Trouble Codes / Pending. HINT: If no pending DTCs are displayed, perform the Confirmation Driving Pattern. After this confirmation, check for pending DTCs. If no DTCs are displayed, the EVAP system is normal. NEXT: Go to next step
3. PERFORM EVAPORATIVE SYSTEM CHECK (MANUAL MODE) NOTE: In the Evaporative System Check (Manual Mode), the series of 6 Evaporative System Check steps are performed manually using the Techstream. Do not perform the Evaporative System Check when the fuel tank is higher than 90% full because the cut-off valve may be closed, making the fuel tank leak check unavailable. Do not run the engine during this operation. When the temperature of the fuel is 35°C (95°F) or higher, a large amount of vapor forms and any check results become inaccurate. When performing the Evaporative System Check, keep the temperature below 35°C (95°F). Connect the Techstream to the DLC3. Turn the power switch on (IG). Turn the Techstream on. Clear the DTCs. Refer to «DTC CHECK / CLEAR»(/toyota/prius-v/i-2011-2014/remont/testing-diagnostics/#engine-control-system-diagnostics-introduction__dtc-check-clear) . Enter the following menus: Powertrain / Engine and ECT / Utility / Evaporative System Check / Manual Mode. NEXT: Go to next step
4. PERFORM EVAPORATIVE SYSTEM CHECK (STEP 1/6) Check the EVAP pressure in step 1/6. RESULT DTC *1 Result Suspected Trouble Area Proceed to - Virtually no variation in EVAP pressure Not yet determined A P0451 EVAP pressure fluctuates by +/-0.3 kPa (gauge) [2.25 mmHg (gauge)] or higher Canister pressure sensor signal noise B (P0452 or P0453) *2 EVAP pressure is less than 42.11 kPa (abs) [315.83 mmHg (abs)], or higher than 123.761 kPa (abs) [928.208 mmHg (abs)] EVAP pressure deviates +/-10 kPa [+/-75 mmHg] from actual atmosphere pressure *3 Canister pressure sensor or its circuit has malfunction C *1: These DTCs are already present in the ECM when the vehicle arrives and are confirmed in the "Confirm DTC" procedure above. *2: If the canister pressure sensor circuit has an open or short, DTC P0452 or P0453 is stored 0.5 seconds after the power switch is turned on (IG). HINT: *3: Canister pressure sensor standard output range is 70 to 111 kPa (abs) [525 to 833 mmHg (abs)]. This varies by weather. B --> See step 38 C --> See step 12 A: Go to next step
5. PERFORM EVAPORATIVE SYSTEM CHECK (STEP 1/6 TO 2/6) Check the EVAP pressure in steps 1/6 and 2/6. RESULT DTC* Result Suspected Trouble Area Proceed to - Virtually no variation in EVAP pressure during step 1/6. Then decreases to reference pressure Not yet determined A P2402 Small difference between EVAP pressures during steps 1/6 and 2/6 Leak detection pump stuck ON B *: These DTCs are already present in the ECM when the vehicle arrives and are confirmed in the "Confirm DTC" procedure above. HINT: The first reference pressure is the value determined in step 2/6. B --> See step 31 A: Go to next step
6. PERFORM EVAPORATIVE SYSTEM CHECK (STEP 2/6) HINT: Make a note of the pressures checked in inspection items (A) and (B) below. Check the EVAP pressure 4 seconds after the leak detection pump is activated*1 (A). *1: The leak detection pump begins to operate as step 1/6 finishes and step 2/6 starts. Check the EVAP pressure again when it has stabilized. This pressure is the reference pressure (B). RESULT DTC*2 Result Suspected Trouble Area Proceed to - EVAP pressure in inspection item (B) is between -4.85 kPa (gauge) and -1.057 kPa (gauge) [-36.375 mmHg (gauge) and -7.928 mmHg (gauge)] Not yet determined A P043F and P2401 EVAP pressure in inspection item (B) is -1.057 kPa (gauge) [-7.928 mmHg (gauge)] or higher Reference orifice high-flow Leak detection pump stuck OFF B P043E EVAP pressure in inspection item (B) is less than -4.85 kPa (gauge) [-36.375 mmHg (gauge)] Reference orifice clogged C P2419 EVAP pressure in inspection item (A) is higher than -0.25 kPa (gauge) [-1.875 mmHg (gauge)] Vent valve stuck closed Leak detection pump performance deteriorates Leak detection pump circuit malfunctioning (large resistance exists in the circuit) D *2: These DTCs are already present in the ECM when the vehicle arrives and are confirmed in the "Confirm DTC" procedure above. B --> See step 11 C --> See step 38 D --> See step 13 A: Go to next step
7. PERFORM EVAPORATIVE SYSTEM CHECK (STEP 2/6 TO 3/6) Check the EVAP pressure in step 3/6. RESULT DTC* Result Suspected Trouble Area Proceed to - EVAP pressure increases by 0.3 kPa (gauge) [2.25 mmHg (gauge)] or higher within 10 seconds of proceeding from step 2/6 to step 3/6 Not yet determined A P2420 No variation in EVAP pressure even after proceeding from step 2/6 to step 3/6 Vent valve stuck open (vent) Canister (charcoal filter inside canister) clogged B P0451 No variation in EVAP pressure during steps 1/6 through 3/6 Canister pressure sensor output value stuck Vent valve broken (valve split in two) Leak detection pump performance deteriorates Leak detection pump circuit malfunctioning (large resistance exists in the circuit) C *: These DTCs are already present in the ECM when the vehicle arrives and are confirmed in the "Confirm DTC" procedure above. B --> See step 27 C --> See step 15 A: Go to next step
8. PERFORM EVAPORATIVE SYSTEM CHECK (STEP 3/6) Wait until the EVAP pressure change is less than 0.12 kPa [0.9 mmHg] for 30 seconds. Measure the EVAP pressure and record it. HINT: A few minutes are required for the EVAP pressure to become saturated. When there is little fuel in the fuel tank, it takes up to 15 minutes. NEXT: Go to next step
9. PERFORM EVAPORATIVE SYSTEM CHECK (STEP 4/6) Check the EVAP pressure in step 4/6. RESULT DTC*1 Result Suspected Trouble Area Proceed to - EVAP pressure increases by 0.3 kPa (gauge) [2.25 mmHg (gauge)] or higher within 10 seconds of proceeding from step 3/6 to step 4/6 Not yet determined A P0441 *2 EVAP pressure increases by 0.3 kPa (gauge) [2.25 mmHg (gauge)] or higher more than 10 seconds of proceeding from step 3/6 to step 4/6 Purge VSV Purge VSV circuit Problems in EVAP hose between purge VSV and intake manifold Problems in EVAP hose between canister and purge VSV ECM B P0441 Variation in EVAP pressure is less than 0.3 kPa (gauge) [2.25 mmHg (gauge)] for 10 seconds, after proceeding from step 3/6 to step 4/6 Purge VSV stuck closed Purge VSV circuit Canister (charcoal filter inside canister) clogged Problems in EVAP hose between purge VSV and intake manifold Problems in EVAP hose between canister and purge VSV ECM C *1: These DTCs are already present in the ECM when the vehicle arrives and are confirmed in the "Confirm DTC" procedure above. *2: This result suggests that due to purge line blockage or purge VSV malfunction, the DTC was stored by the purge flow monitor while the engine was running, or that key-off monitor test result were nearly borderline values. B --> See step 22 C --> See step 17 A: Go to next step
10. PERFORM EVAPORATIVE SYSTEM CHECK (STEP 5/6) Check the EVAP pressure in step 5/6. Compare the EVAP pressure in step 3/6 and the second reference pressure (step 5/6). RESULT DTC* Result Suspected Trouble Area Proceed to - EVAP pressure from step 3/6 lower than second reference pressure (step 5/6) Not yet determined (no leakage from EVAP system) A P0441 and P0455 EVAP pressure from step 3/6 higher than [second reference pressure (step 5/6) x 0.2] Purge VSV stuck open EVAP gross leak B P0456 EVAP pressure from step 3/6 higher than second reference pressure (step 5/6) EVAP small leak B *: These DTCs are already present in the ECM when the vehicle arrives and are confirmed in the "Confirm DTC" procedure above. A --> See step 43 B --> See step 17
11. PERFORM EVAPORATIVE SYSTEM CHECK (STEP 3/6) Check the EVAP pressure in step 3/6. RESULT DTC* Result Suspected Trouble Area Proceed to P043F EVAP pressure less than [reference pressure] measured in step 2/6 Reference orifice high-flow A P2401 EVAP pressure almost same as [reference pressure] measured in step 2/6 Leak detection pump stuck off B *: These DTCs are already present in the ECM when the vehicle arrives and are confirmed in the "Confirm DTC" procedure above. HINT: The first reference pressure is the value determined in step 2/6. A --> See step 38 B --> See step 31
12. INSPECT CANISTER PUMP MODULE (CANISTER PRESSURE SENSOR CIRCUIT) Check the canister pressure sensor circuit, referring to DTC P0451 canister pressure sensor circuit inspection procedure. Refer to «INSPECTION PROCEDURE»(/toyota/prius-v/i-2011-2014/remont/testing-diagnostics/#engine-control-system-diagnostic-codes-circuit-tests) . NEXT --> See step 49
13. INSPECT CANISTER PUMP MODULE (VENT VALVE OPERATION) Turn the power switch off. Disconnect the canister pump module connector. TEXT IN ILLUSTRATION *a Component without harness connected (Canister Pump Module) Apply the auxiliary battery voltage to terminals VLVB and VGND of the pump module. Touch the canister pump module to confirm the vent valve operation. RESULT Condition Tester Result Suspected Trouble Area Proceed to Apply auxiliary battery voltage to terminals VLVB and VGND Operating Wire harness or connector between vent valve and ECM Leak detection pump performance deteriorates Leak detection pump circuit malfunctioning (large resistance exists in the circuit) ECM A Not operating Vent valve B B --> See step 38 A: Go to next step
14. CHECK HARNESS AND CONNECTOR (CANISTER PUMP MODULE - ECM) Turn the power switch off. Disconnect the ECM connector. Disconnect the canister pump module connector. Measure the resistance according to the value(s) in the table below. Standard Resistance Tester Connection Condition Specified Condition A57-42 (VPMP) - o1-1 (VGND) Always Below 1 ohms A57-42 (VPMP) or o1-1 (VGND) - Body ground Always 10 kohms or higher RESULT Result Suspected Trouble Area Proceed to OK Leak detection pump performance deteriorates Leak detection pump circuit malfunctioning (large resistance exists in the circuit) ECM A NG Wire harness or connector between ECM and canister pump module B B --> See step 40 A: Go to next step
15. CHECK HARNESS AND CONNECTOR (CANISTER PUMP MODULE - BODY GROUND) Disconnect the canister pump module connector. Measure the resistance according to the value(s) in the table below. RESULT Tester Connection Condition Specified Condition Suspected Trouble Area Proceed to o1-4 (MGND) - Body ground Always Below 1 ohms Canister pump module Wire harness or connector between canister pump module and ECM ECM A 10 kohms or higher Wire harness or connector between canister pump module and body ground B B --> See step 40 A: Go to next step
16. CHECK HARNESS AND CONNECTOR (ECM - CANISTER PUMP MODULE) Disconnect the canister pump module connector. Disconnect the ECM connector. Measure the resistance according to the value(s) in the table below. RESULT Tester Connection Condition Specified Condition Suspected Trouble Area Proceed to A57-34 (MPMP) - o1-3 (MTRB) Always Below 1 ohms Canister pump module ECM A 10 kohms or higher Wire harness or connector between ECM and canister pump module B A --> See step 45 B --> See step 40
17. PERFORM ACTIVE TEST USING TECHSTREAM (PURGE VSV) Enter the following menus: Powertrain / Engine and ECT / Active Test / Activate the VSV for EVAP Control. Disconnect the hose (connected to the canister) from the purge VSV. TEXT IN ILLUSTRATION *1 Purge VSV *2 Hose (to Canister) Start the engine. Using the Techstream, turn off the purge VSV (Activate the VSV for Evap Control: OFF). Use your finger to confirm that the purge VSV has no suction. Using the Techstream, turn on the purge VSV (Activate the VSV for Evap Control: ON). Use your finger to confirm that the purge VSV has suction. RESULT Test Result Suspected Trouble Area Proceed to No suction when purge VSV turned off, and suction applied when turned on Blockage in the purge line is considered (based on result of step 9): Problems with EVAP hose between canister and purge VSV Canister (charcoal filter inside canister) clogged ECM A Leakage is considered (based on result of step 10): Fuel cap Leakage from EVAP line, fuel tank, or canister B Suction applied when purge VSV turned off Purge VSV stuck open C No suction when purge VSV turned on Purge VSV stuck closed Problems with EVAP hose between purge VSV and intake manifold D B --> See step 20 C --> See step 21 D --> See step 23 A: Go to next step
18. INSPECT EVAP HOSE (PURGE VSV - CANISTER) Check for blockages in the EVAP purge line between the purge VSV and canister. OK No blockages in the EVAP purge line between the purge VSV and canister. NG --> See step 44 OK: Go to next step
19. INSPECT CANISTER (CHARCOAL FILTER INSIDE CANISTER) Check for filter blockage in the canister. Refer to «INSPECTION - Step 1»(/toyota/prius-v/i-2011-2014/remont/auxiliary-emission-control-systems/#emission-control-system-service-information) . OK No blockages in the canister. OK --> See step 47 NG --> See step 48
20. CHECK FUEL CAP Check that the fuel cap is correctly installed and confirm that the fuel cap meets OEM specifications. Tighten the fuel cap firmly (only one click sound could be heard). HINT: If an EVAP tester is available, check the fuel cap using the Techstream. Remove the fuel cap and install it onto a fuel cap adapter. Connect an EVAP tester pump hose to the adapter, and pressurize the cap to 3.2 to 3.7 kPa (gauge) [24 to 28 mmHg (gauge)] using an EVAP tester pump. Seal the adapter and wait for 2 minutes. Check the pressure. If the pressure is 2 kPa (gauge) [15 mmHg (gauge)] or higher, the fuel cap is normal. RESULT Test Result Suspected Trouble Area Proceed to Fuel cap correctly installed - A Fuel cap loose Fuel cap improperly installed Defective fuel cap Fuel cap does not meet OEM specifications B Defective fuel cap - B No fuel cap - C A --> See step 37 B --> See step 35 C --> See step 36
21. INSPECT PURGE VSV Turn the power switch off. Disconnect the purge VSV connector. TEXT IN ILLUSTRATION *1 Hose (to Canister) *2 Connector *3 Purge VSV Disconnect the hose (connected to the canister) from the purge VSV. Start the engine. Use your finger to confirm that the purge VSV has no suction. RESULT Test Result Suspected Trouble Area Proceed to No suction Wire harness or connector between purge VSV and ECM ECM A Suction applied Purge VSV B A --> See step 26 B --> See step 39
22. INSPECT EVAP HOSE (PURGE VSV - CANISTER) Check for blockages in the EVAP purge line between the purge VSV and canister. OK No blockages in the EVAP purge line between the purge VSV and canister. NG --> See step 44 OK: Go to next step
23. CHECK EVAP HOSE (PURGE VSV - INTAKE MANIFOLD) Disconnect the hose (connected to the intake manifold) from the purge VSV. TEXT IN ILLUSTRATION *1 Purge VSV *2 Hose (to intake manifold) Start the engine. Use your finger to confirm that the hose has suction. RESULT Test Result Suspected Trouble Area Proceed to Suction applied EVAP hose between purge VSV and intake manifold normal Purge VSV Purge VSV power source Wire harness or connector between purge VSV and ECM A No suction Intake manifold port EVAP hose between purge VSV and intake manifold B B --> See step 34 A: Go to next step
24. INSPECT PURGE VSV Remove the purge VSV. Apply auxiliary battery voltage to the terminals of the purge VSV. TEXT IN ILLUSTRATION *1 Purge VSV Confirm that air flows from port E to port F. RESULT Test Result Condition Suspected Trouble Area Proceed to Air flows Auxiliary battery voltage is applied to purge VSV terminals Purge VSV normal Purge VSV power source Wire harness or connector between purge VSV and ECM A No air flow Auxiliary battery voltage is applied to purge VSV terminals Purge VSV B B --> See step 39 A: Go to next step
25. CHECK TERMINAL VOLTAGE (POWER SOURCE OF PURGE VSV) Disconnect the purge VSV connector. Turn the power switch on (IG). TEXT IN ILLUSTRATION *a Front view of wire harness connector (to Purge VSV) Measure the voltage according to the value(s) in the table below. RESULT Tester Connection Condition Specified Condition Suspected Trouble Area Proceed to D11-2 - Body ground Power switch on (IG) 11 to 14 V Purge VSV power source normal Wire harness or connector between purge VSV and ECM A Other than result above Wire harness or connectors between purge VSV and auxiliary battery B B --> See step 40 A: Go to next step
26. CHECK HARNESS AND CONNECTOR (PURGE VSV - ECM) Disconnect the ECM connector. Disconnect the purge VSV connector. Measure the resistance according to the value(s) in the table below. Standard Resistance Tester Connection Condition Specified Condition D11-1 - D28-28 (PRG) Always Below 1 ohms D11-1 or D28-28 (PRG) - Body ground Always 10 kohms or higher OK --> See step 47 NG --> See step 40
27. INSPECT CANISTER PUMP MODULE (POWER SOURCE FOR VENT VALVE) Turn the power switch off. TEXT IN ILLUSTRATION *a Front view of wire harness connector (to Canister Pump Module) - - Disconnect the canister pump module connector. Turn the power switch on (IG). Measure the voltage according to the value(s) in the table below. RESULT Tester Connection Condition Specified Condition Suspected Trouble Area Proceed to o1-5 (VLVB) - Body ground Power switch on (IG) 11 to 14 V Wire harness or connector between vent valve and ECM Vent valve Canister (charcoal filter inside canister) clogged ECM A Below 3 V Power source wire harness of vent valve B B --> See step 40 A: Go to next step
28. INSPECT CANISTER PUMP MODULE (VENT VALVE OPERATION) Turn the power switch off. Disconnect the canister pump module connector. TEXT IN ILLUSTRATION *a Component without harness connected (Canister Pump Module) Apply the auxiliary battery voltage to terminals VLVB and VGND of the pump module. Touch the canister pump module to confirm the vent valve operation. RESULT Condition Tester Result Suspected Trouble Area Proceed to Apply auxiliary battery voltage to terminals VLVB and VGND Operating Wire harness or connector between vent valve and ECM Canister (charcoal filter inside canister) clogged ECM A Not operating Vent valve B B --> See step 38 A: Go to next step
29. CHECK HARNESS AND CONNECTOR (CANISTER PUMP MODULE - ECM) Turn the power switch off. Disconnect the ECM connector. Disconnect the canister pump module connector. Measure the resistance according to the value(s) in the table below. RESULT Tester Connection Condition Test Result Suspected Trouble Area Proceed to A57-42 (VPMP) - o1-1 (VGND) Always Below 1 ohms Canister (charcoal filter inside canister) clogged ECM A 10 kohms or higher Wire harness or connector between ECM and canister pump module B B --> See step 40 A: Go to next step
30. INSPECT CANISTER (CHARCOAL FILTER INSIDE CANISTER) Check for filter blockage in the canister. Refer to «INSPECTION - Step 1»(/toyota/prius-v/i-2011-2014/remont/auxiliary-emission-control-systems/#emission-control-system-service-information) . OK No blockages in the canister. OK --> See step 47 NG --> See step 48
31. PERFORM ACTIVE TEST USING TECHSTREAM (ACTIVATE THE VACUUM PUMP) Turn the power switch off. Disconnect the canister pump module connector. TEXT IN ILLUSTRATION *a Front view of wire harness connector (to Canister Pump Module) - - Turn the power switch on (IG). Enter the following menus: Powertrain / Engine and ECT / Active Test / Activate the Vacuum Pump. Measure the voltage according to the value(s) in the table below. RESULT Tester Connection Condition Test Result Suspected Trouble Area Proceed to o1-3 (MTRB) - Body ground Leak detection pump on and off (Active Test ON and OFF) Below 3 V when OFF 9 to 14 V when ON Wire harness or connector between leak detection pump and body ground Leak detection pump A Below 3 V when OFF and ON Wire harness or connector between leak detection pump and ECM ECM B 9 to 14 V when OFF and ON ECM C B --> See step 33 C --> See step 47 A: Go to next step
32. CHECK HARNESS AND CONNECTOR (CANISTER PUMP MODULE - BODY GROUND) Turn the power switch off. Disconnect the canister pump module connector. Measure the resistance according to the value(s) in the table below. RESULT Tester Connection Condition Specified Condition Suspected Trouble Area Proceed to o1-4 (MGND) - Body ground Always Below 1 ohms Leak detection pump A 10 kohms or higher Wire harness or connector between canister pump module and body ground B A --> See step 38 B --> See step 40
33. CHECK HARNESS AND CONNECTOR (ECM - CANISTER PUMP MODULE) Turn the power switch off. Disconnect the canister pump module connector. Disconnect the ECM connector. Measure the resistance according to the value(s) in the table below. Standard Resistance Tester Connection Condition Specified Condition A57-34 (MPMP) - o1-3 (MTRB) Always Below 1 ohms A57-34 (MPMP) or o1-3 (MTRB) - Body ground Always 10 kohms or higher RESULT Result Suspected Trouble Area Proceed to OK ECM A NG Wire harness or connector between ECM and canister pump module B A --> See step 47 B --> See step 40
34. INSPECT INTAKE MANIFOLD (EVAP PURGE PORT) Stop the engine. Disconnect the EVAP hose from the intake manifold. Start the engine. Use your finger to confirm that the port of the intake manifold has suction. RESULT Tester Connection Suspected Trouble Area Proceed to Suction applied EVAP hose between intake manifold and purge VSV A No suction Intake manifold B A --> See step 41 B --> See step 42
35. CORRECTLY REINSTALL OR REPLACE FUEL TANK CAP ASSEMBLY HINT: When reinstalling the fuel cap, tighten it firmly (only one click sound could be head). When replacing the fuel cap, use a fuel cap that meets OEM specifications, and install it firmly. NEXT --> See step 49
36. REPLACE FUEL TANK CAP ASSEMBLY HINT: When installing the fuel cap, tighten it firmly (only one click sound could be head). NEXT --> See step 49
37. LOCATE EVAP LEAK PART Disconnect the vent hose. TEXT IN ILLUSTRATION *1 Fuel Tank *2 Canister *3 Canister Filter *4 Fuel Cap *5 Canister Pump Module - - *a Disconnect the vent hose here - - Connect the EVAP pressure tester tool to the canister pump module with the adapter. TEXT IN ILLUSTRATION *1 Canister Pump Module *2 Adapter *3 EVAP Pressure Tester Tool - - Pressurize the EVAP system to 3.2 to 3.7 kPa (gauge) [24 to 27.75 mmHg (gauge)]. Apply soapy water to the piping and connecting parts of the EVAP system. Look for areas where bubbles appear. This indicates the leak point. Repair or replace the leak point. HINT: Disconnect the hose between the canister and fuel tank from the canister. Block the canister side and conduct an inspection. In this way, the fuel tank can be excluded as an area suspected of causing fuel leaks. NEXT --> See step 49
38. REPLACE CANISTER PUMP MODULE Replace the canister pump module. Refer to «REMOVAL - Step 2»(/toyota/prius-v/i-2011-2014/remont/auxiliary-emission-control-systems/#emission-control-system-service-information) . NOTE: When replacing canister pump module, check the canister pump module interior, canister interior and related pipes for water, fuel and other liquids. If liquids are present, check for disconnections and/or cracks in the following: 1) the pipe from the air inlet port to the canister pump module; 2) the canister filter; and 3) the fuel tank vent hose. If liquids are present in canister interior, replace canister and canister pump module together. Check for filter blockage in the canister. If the charcoal filter inside the canister is clogged, replace the canister. Check for filter blockage in the canister filter. If the canister filter has blockages, replace the canister filter. TEXT IN ILLUSTRATION *1 Fuel Tank Vent Hose *2 Air Inlet Port *3 Vent Hose *4 Fuel Tank *5 Canister Pump Module *6 Canister *7 Canister Filter - - *a Inspection Area (check for disconnection and/or cracks) - - NEXT --> See step 49
39. REPLACE PURGE VSV Replace the purge VSV. Refer to «REMOVAL»(/toyota/prius-v/i-2011-2014/remont/auxiliary-emission-control-systems/#emission-control-system-service-information) . NEXT --> See step 49
40. REPAIR OR REPLACE HARNESS OR CONNECTOR NEXT --> See step 49
41. REPAIR OR REPLACE EVAP PURGE LINE (INTAKE MANIFOLD - PURGE VSV) NEXT --> See step 49
42. INSPECT INTAKE MANIFOLD (EVAP PURGE PORT) Check that the EVAP purge port of the intake manifold is not clogged. If necessary, replace the intake manifold. Refer to «REMOVAL»(/toyota/prius-v/i-2011-2014/remont/exhaust/#exhaust-system-service-information) . NEXT --> See step 49
43. REPAIR OR REPLACE PARTS AND COMPONENTS INDICATED BY OUTPUT DTCS Repair the malfunctioning areas indicated by the DTCs that had been confirmed when the vehicle was brought in. NEXT --> See step 49
44. REPAIR OR REPLACE EVAP PURGE LINE (PURGE VSV - CANISTER) NEXT --> See step 49
45. REPLACE CANISTER PUMP MODULE Replace the canister pump module. Refer to «REMOVAL - Step 2»(/toyota/prius-v/i-2011-2014/remont/auxiliary-emission-control-systems/#emission-control-system-service-information) . NOTE: When replacing canister pump module, check the canister pump module interior, canister interior and related pipes for water, fuel and other liquids. If liquids are present, check for disconnections and/or cracks in the following: 1) the pipe from the air inlet port to the canister pump module; 2) the canister filter; and 3) the fuel tank vent hose. If liquids are present in canister interior, replace canister and canister pump module together. Check for filter blockage in the canister. If the charcoal filter inside the canister is clogged, replace the canister. Check for filter blockage in the canister filter. If the canister filter has blockages, replace the canister filter. TEXT IN ILLUSTRATION *1 Fuel Tank Vent Hose *2 Air Inlet Port *3 Vent Hose *4 Fuel Tank *5 Canister Pump Module *6 Canister *7 Canister Filter - - *a Inspection Area (check for disconnection and/or cracks) - - NEXT: Go to next step
46. PERFORM EVAPORATIVE SYSTEM CHECK (AUTOMATIC MODE) NOTE: The Evaporative System Check (Automatic Mode) consists of 6 steps performed automatically by the Techstream. It takes a maximum of approximately 24 minutes. Do not perform the Evaporative System Check when the fuel tank is higher than 90% full because the cut-off valve may be closed, making the fuel tank leak check unavailable. Do not run the engine in this step. When the temperature of the fuel is 35°C (95°F) or higher, a large amount of vapor forms and any check results become inaccurate. When performing an Evaporative System Check, keep the fuel temperature below 35°C (95°F). Connect the Techstream to the DLC3. Turn the power switch on (IG). Turn the Techstream on. Clear the DTCs. Refer to «DTC CHECK / CLEAR»(/toyota/prius-v/i-2011-2014/remont/testing-diagnostics/#engine-control-system-diagnostics-introduction__dtc-check-clear) . Enter the following menus: Powertrain / Engine and ECT / Utility / Evaporative System Check / Automatic Mode. After the Evaporative System Check is completed, check for pending DTCs by entering the following menus: Powertrain / Engine and ECT / Trouble Codes. RESULT Result Proceed to EVAP system DTCs are output A No DTCs output (No pending DTCs output) B B --> END A: Go to next step
47. REPLACE ECM Replace the ECM. Refer to «REMOVAL»(/toyota/prius-v/i-2011-2014/remont/testing-diagnostics/#engine-control-system-service-information) . NEXT --> See step 49
48. REPLACE CANISTER Replace the canister. Refer to «REMOVAL - Step 1»(/toyota/prius-v/i-2011-2014/remont/auxiliary-emission-control-systems/#emission-control-system-service-information) . NOTE: When replacing the canister, check the canister pump module interior and related pipes for water, fuel and other liquids. If liquids are present, check for disconnections and/or cracks in the following: 1) the pipe from the air inlet port to the canister pump module; 2) the canister filter; and 3) the fuel tank vent hose. Check for filter blockage in the canister filter. If the canister filter has blockages, replace the canister filter. TEXT IN ILLUSTRATION *1 Fuel Tank Vent Hose *2 Air Inlet Port *3 Vent Hose *4 Fuel Tank *5 Canister Pump Module *6 Canister *7 Canister Filter - - *a Inspection Area (check for disconnection and/or cracks) - - NEXT: Go to next step
49. PERFORM EVAPORATIVE SYSTEM CHECK (AUTOMATIC MODE) NOTE: The Evaporative System Check (Automatic Mode) consists of 6 steps performed automatically by the Techstream. It takes a maximum of approximately 24 minutes. Do not perform the Evaporative System Check when the fuel tank is higher than 90% full because the cut-off valve may be closed, making the fuel tank leak check unavailable. Do not run the engine in this step. When the temperature of the fuel is 35°C (95°F) or higher, a large amount of vapor forms and any check results become inaccurate. When performing an Evaporative System Check, keep the fuel temperature below 35°C (95°F). Connect the Techstream to the DLC3. Turn the power switch on (IG). Turn the Techstream on. Clear the DTCs. Refer to «DTC CHECK / CLEAR»(/toyota/prius-v/i-2011-2014/remont/testing-diagnostics/#engine-control-system-diagnostics-introduction__dtc-check-clear) . Enter the following menus: Powertrain / Engine and ECT / Utility / Evaporative System Check / Automatic Mode. After the Evaporative System Check is completed, check for pending DTCs by entering the following menus: Powertrain / Engine and ECT / Trouble Codes. HINT: If no pending DTCs are found, the repair has been successfully completed. NEXT --> END

HINT

After a repair, check Monitor Status by performing the Key-Off Monitor Confirmation and Purge Flow Monitor Confirmation described below.

1. KEY-OFF MONITOR CONFIRMATION Preconditions The monitor will not run unless: The vehicle has been driven for 10 minutes or more (in a city area or on a freeway). The fuel tank is less than 90% full. The altitude is less than 8000 ft. (2438 m). The engine coolant temperature is between 4.4 and 35°C (40 and 95°F). The intake air temperature is between 4.4 and 35°C (40 and 95°F). The vehicle remains stationary (the vehicle speed is 0 km/h [0 mph]). Monitor Conditions Put the engine in inspection mode (maintenance mode). Refer to «INSPECTION MODE PROCEDURE»(/toyota/prius-v/i-2011-2014/remont/hoistjack/#introduction) . Allow the engine to idle for at least 5 minutes. Turn the power switch off and wait for 6 hours (8 or 10.5 hours). HINT: Do not start the engine until checking Monitor Status. If the engine is started, the steps described above must be repeated. Monitor Status Connect the Techstream to the DLC3. Turn the power switch on (IG). Turn the Techstream on. Enter the following menus: Powertrain / Engine and ECT / Monitor / Current Monitor / Evaporative System. Check the Monitor Status displayed on the Techstream. HINT: If Incomplete is displayed, the monitor did not complete. Make sure that the preconditions have been met, and perform the Monitor Conditions again.
2. PURGE FLOW MONITOR CONFIRMATION (P0441) HINT: Perform this monitor confirmation after the Key-Off Monitor Confirmation shows Complete. Preconditions The monitor will not run unless: The vehicle has been driven for 10 minutes or more (in a city area or on a freeway). The engine coolant temperature is between 4.4 and 35°C (40 and 95°F). The intake air temperature is between 4.4 and 35°C (40 and 95°F). Monitor Conditions Release the pressure from the fuel tank by removing and reinstalling the fuel cap. Put the engine in inspection mode (maintenance mode). Refer to «INSPECTION MODE PROCEDURE»(/toyota/prius-v/i-2011-2014/remont/hoistjack/#introduction) . Warm the engine up until the engine coolant temperature reaches more than 75°C (167°F). Increase the engine speed to 2500 RPM once. Allow the engine to idle and turn the A/C switch on for 1 minute. Monitor Status Turn the power switch off (if on (IG) or if the engine is running). Connect the Techstream to the DLC3. Turn the power switch on (IG). Turn the Techstream on. Enter the following menus: Powertrain / Engine and ECT / Monitor / Current Monitor / Evaporative System. Check the Monitor Status displayed on the Techstream. HINT: If Incomplete is displayed, the monitor did not complete. Make sure that the preconditions have been met, and perform the Monitor Conditions again.

Refer to detailed information in Checking Monitor Status. Refer to CHECKING MONITOR STATUS .

P0456: EVAPORATIVE SYSTEM / SMALL LEAK

P0455: EVAPORATIVE SYSTEM / GROSS LEAK

P2401: EVAPORATIVE SYSTEM / VACUUM PMP OFF

P2402: EVAPORATIVE SYSTEM / VACUUM PMP ON

P2420: EVAPORATIVE SYSTEM / VENT VALVE OFF

P2419: EVAPORATIVE SYSTEM / VENT VALVE ON

P043E: EVAPORATIVE SYSTEM / ORIFICE CLOGGED

P043F: EVAPORATIVE SYSTEM / ORIFICE HI-FLW

P0441: EVAPORATIVE SYSTEM / PURGE VSV CLOSED

P0441: EVAPORATIVE SYSTEM / PURGE VSV OPENED

P0441: EVAPORATIVE SYSTEM / PURGE FLOW

When the power switch is turned on (IG), auxiliary battery voltage is applied to IGSW of the ECM. The output signal from the MREL terminal of the ECM causes a current to flow to the coil, closing the contacts of the No. 2 integration relay (EFI MAIN relay) and supplying power to either terminal +B and +B2 of the ECM.

Scheme 103

Note. After turning power switch off, waiting time may be required before disconnecting the cable from the negative (-) auxiliary battery terminal. Therefore, make sure to read the disconnecting the cable from the negative (-) auxiliary battery terminal notices before proceeding with work. Refer to PRECAUTION Inspect the fuses for circuits related to this system before performing the following inspection procedure.

Scheme 104

1. CHECK HARNESS AND CONNECTOR (ECM - BODY GROUND) Disconnect the ECM connector. Measure the resistance according to the value(s) in the table below. Standard Resistance Tester Connection Condition Specified Condition D28-104 (E1) - Body ground Always Below 1 ohms NG --> REPAIR OR REPLACE HARNESS OR CONNECTOR OK: Go to next step
2. INSPECT ECM (IGSW VOLTAGE) Disconnect the ECM connector. Turn the power switch on (IG). Measure the voltage according to the value(s) in the table below. Standard Voltage Tester Connection Condition Specified Condition A57-28 (IGSW) - Body ground Power switch on (IG) 11 to 14 V TEXT IN ILLUSTRATION *a Front view of wire harness connector (to ECM) NG --> See step 8 OK: Go to next step
3. INSPECT NO. 2 INTEGRATION RELAY (EFI MAIN RELAY) Inspect the No. 2 integration relay (EFI MAIN relay). Refer to «INSPECTION»(/toyota/prius-v/i-2011-2014/remont/testing-diagnostics/#engine-control-system-service-information) . NG --> See step 14 OK: Go to next step
4. CHECK HARNESS AND CONNECTOR (NO. 2 INTEGRATION RELAY (EFI MAIN RELAY) - ECM) Remove the No. 2 integration relay (EFI MAIN relay) from the engine room relay block and junction block assembly. Disconnect the No. 2 integration relay connector. Disconnect the ECM connector. Measure the resistance according to the value(s) in the table below. Standard Resistance Tester Connection Condition Specified Condition 1B-4 - A57-1 (+B2) Always Below 1 ohms 1B-4 - A57-2 (+B) Always Below 1 ohms 1B-2 - A57-6 (MREL) Always Below 1 ohms 1B-4 or A57-1 (+B2) - Body ground Always 10 kohms or higher 1B-4 or A57-2 (+B) - Body ground Always 10 kohms or higher 1B-2 or A57-6 (MREL) - Body ground Always 10 kohms or higher NG --> REPAIR OR REPLACE HARNESS OR CONNECTOR OK: Go to next step
5. CHECK HARNESS AND CONNECTOR (NO. 2 INTEGRATION RELAY (EFI MAIN RELAY) - AUXILIARY BATTERY) Remove the No. 2 integration relay (EFI MAIN relay) from the engine room relay block and junction block assembly. Disconnect the No. 2 integration relay connector. Disconnect the negative (-) auxiliary battery terminal. Disconnect the positive (+) auxiliary battery terminal. Measure the resistance according to the value(s) in the table below. Standard Resistance Tester Connection Condition Specified Condition 1C-1 - Positive (+) auxiliary battery terminal Always Below 1 ohms 1C-1 or Positive (+) auxiliary battery terminal - Body ground Always 10 kohms or higher NG --> REPAIR OR REPLACE HARNESS OR CONNECTOR OK: Go to next step
6. CHECK HARNESS AND CONNECTOR (NO. 2 INTEGRATION RELAY (EFI MAIN RELAY) - BODY GROUND) Remove the No. 2 integration relay (EFI MAIN relay) from the engine room relay block and junction block assembly. Disconnect the No. 2 integration relay connector. Measure the resistance according to the value(s) in the table below. Standard Resistance Tester Connection Condition Specified Condition 1B-3 - Body ground Always Below 1 ohms NG --> REPAIR OR REPLACE HARNESS OR CONNECTOR OK --> See step 7
7. PROCEED TO NEXT SUSPECTED AREA SHOWN IN PROBLEM SYMPTOMS TABLE. Refer to «PROBLEM SYMPTOMS TABLE»(/toyota/prius-v/i-2011-2014/remont/testing-diagnostics/#engine-control-system-diagnostics-introduction__problem-symptoms-table)
8. INSPECT NO. 2 INTEGRATION RELAY (IG2 RELAY) Inspect the No. 2 integration relay (IG2 relay). Refer to «INSPECTION»(/toyota/prius-v/i-2011-2014/remont/testing-diagnostics/#engine-control-system-service-information) . NG --> See step 15 OK: Go to next step
9. CHECK HARNESS AND CONNECTOR (NO. 2 INTEGRATION RELAY (IG2 RELAY) - ECM) Disconnect the ECM connector. Remove the No. 2 integration relay (IG2 relay) from the engine room relay block and junction block assembly. Disconnect the No. 2 integration relay connector. Measure the resistance according to the value(s) in the table below. Standard Resistance Tester Connection Condition Specified Condition 1A-4 - A57-28 (IGSW) Always Below 1 ohms 1A-4 or A57-28 (IGSW) - Body ground Always 10 kohms or higher NG --> REPAIR OR REPLACE HARNESS OR CONNECTOR OK: Go to next step
10. CHECK HARNESS AND CONNECTOR (NO. 2 INTEGRATION RELAY (IG2 RELAY) - AUXILIARY BATTERY) Remove the No. 2 integration relay (IG2 relay) from the engine room relay block and junction block assembly. Disconnect the No. 2 integration relay connector. Disconnect the negative (-) auxiliary battery terminal. Disconnect the positive (+) auxiliary battery terminal. Measure the resistance according to the value(s) in the table below. Standard Resistance Tester Connection Condition Specified Condition 1C-1 - Positive (+) auxiliary battery terminal Always Below 1 ohms 1C-1 or Positive (+) auxiliary battery terminal - Body ground Always 10 kohms or higher NG --> REPAIR OR REPLACE HARNESS OR CONNECTOR OK: Go to next step
11. CHECK HARNESS AND CONNECTOR (NO. 2 INTEGRATION RELAY (IG2 RELAY) - BODY GROUND) Remove the No. 2 integration relay (IG2 relay) from the engine room relay block and junction block assembly. Disconnect the No. 2 integration relay connector. Measure the resistance according to the value(s) in the table below. Standard Resistance Tester Connection Condition Specified Condition 1A-3 - Body ground Always Below 1 ohms NG --> REPAIR OR REPLACE HARNESS OR CONNECTOR OK: Go to next step
12. CHECK HARNESS AND CONNECTOR (POWER MANAGEMENT CONTROL ECU - NO. 2 INTEGRATION RELAY) Remove the No. 2 integration relay (IG2 relay) from the engine room relay block and junction block assembly. Disconnect the No. 2 integration relay connector. Disconnect the power management control ECU connector. Measure the resistance according to the value(s) in the table below. Standard Resistance Tester Connection Condition Specified Condition A22-2 (IG2D) - 1A-2 Always Below 1 ohms NG --> REPAIR OR REPLACE HARNESS OR CONNECTOR OK --> See step 13
13. CHECK SMART KEY SYSTEM (FOR ENTRY FUNCTION). Refer to «HOW TO PROCEED WITH TROUBLESHOOTING»(/toyota/prius-v/i-2011-2014/remont/door-locks-anti-theft-systems/#smart-key-system-for-entry-function-diagnostics-introduction__how-to-proceed-with-troubleshooting)
14. REPLACE NO. 2 INTEGRATION RELAY (EFI MAIN RELAY). Refer to «REMOVAL - Step 2»(/toyota/prius-v/i-2011-2014/remont/testing-diagnostics/#engine-control-system-service-information)
15. REPLACE NO. 2 INTEGRATION RELAY (IG2 RELAY). Refer to «REMOVAL - Step 2»(/toyota/prius-v/i-2011-2014/remont/testing-diagnostics/#engine-control-system-service-information)

The ECM constantly uses 5 V from the auxiliary battery voltages supplied to the +B (BATT) terminal to operate the microprocessor. The ECM also provides this power to the sensors through the VC output circuit.

Scheme 105

When the VC circuit is shorted, the microprocessor in the ECM and sensors that are supplied power through the VC circuit are inactivated because the power is not supplied from the VC circuit. Under this condition, the system does not start up and the MIL does not illuminate even if the system malfunctions.

HINT

Under normal conditions, the MIL is illuminated when the power switch on (IG). The MIL goes off when the power switch on (READY).

Scheme 106

1. CHECK MIL Check that the Malfunction Indicator Lamp (MIL) illuminates when turning the power switch on (IG). OK MIL lights up. NG --> See step 2 OK --> See step 8
2. CHECK CONNECTION BETWEEN TECHSTREAM AND ECM Connect the Techstream to the DLC3. Turn the power switch on (IG). Turn the Techstream on. Check the communication between the Techstream and ECM. RESULT Result Proceed to Communication is not possible A Communication is possible B B --> See step 9 A: Go to next step
3. CHECK MIL (THROTTLE POSITION SENSOR) Disconnect the throttle position sensor connector. Turn the power switch on (IG). Check the MIL. RESULT Result Proceed to MIL does not illuminate A MIL illuminates B B --> See step 10 A: Go to next step
4. CHECK MIL (CAMSHAFT POSITION SENSOR) Disconnect the camshaft position sensor connector. Turn the power switch on (IG). Check the MIL. RESULT Result Proceed to MIL does not illuminate A MIL illuminates B B --> See step 11 A: Go to next step
5. CHECK MIL (MANIFOLD ABSOLUTE PRESSURE SENSOR) Disconnect the manifold absolute pressure sensor connector. Turn the power switch on (IG). Check the MIL. RESULT Result Proceed to MIL does not illuminate A MIL illuminates B B --> See step 12 A: Go to next step
6. CHECK MIL (CANISTER PUMP MODULE) Disconnect the canister pump module connector. Turn the power switch on (IG). Check the MIL. RESULT Result Proceed to MIL does not illuminate A MIL illuminates B B --> See step 13 A: Go to next step
7. CHECK HARNESS AND CONNECTOR (THROTTLE POSITION SENSOR - ECM) Disconnect the throttle position sensor connector. Disconnect the camshaft position sensor connector. Disconnect the manifold absolute pressure sensor connector. Disconnect the canister pump module connector. Disconnect the ECM connector. Measure the resistance according to the value(s) in the table below. Standard Resistance Tester Connection Condition Specified Condition D4-5 (VC) or D28-88 (VCTA) - Body ground Always 10 kohms or higher D18-3 (VC) or D28-99 (VCV1) - Body ground Always 10 kohms or higher D3-3 (VC) or D28-72 (VCPM) - Body ground Always 10 kohms or higher o1-6 (VCC) or D28-113 (VCPP) - Body ground Always 10 kohms or higher NG --> REPAIR OR REPLACE HARNESS OR CONNECTOR OK --> See step 14
8. PROCEED TO NEXT SUSPECTED AREA SHOWN IN PROBLEM SYMPTOMS TABLE. Refer to «PROBLEM SYMPTOMS TABLE»(/toyota/prius-v/i-2011-2014/remont/testing-diagnostics/#engine-control-system-diagnostics-introduction__problem-symptoms-table)
9. GO TO MIL CIRCUIT. Refer to «MIL Circuit»(/toyota/prius-v/i-2011-2014/remont/testing-diagnostics/#engine-control-system-diagnostic-codes-circuit-tests)
10. REPLACE THROTTLE BODY ASSEMBLY. Refer to «REMOVAL»(/toyota/prius-v/i-2011-2014/remont/testing-diagnostics/#engine-control-system-service-information)
11. REPLACE CAMSHAFT POSITION SENSOR. Refer to «REMOVAL»(/toyota/prius-v/i-2011-2014/remont/testing-diagnostics/#engine-control-system-service-information)
12. REPLACE MANIFOLD ABSOLUTE PRESSURE SENSOR. Refer to «REMOVAL»(/toyota/prius-v/i-2011-2014/remont/auxiliary-emission-control-systems/#emission-control-system-service-information)
13. REPLACE CANISTER PUMP MODULE. Refer to «REMOVAL - Step 2»(/toyota/prius-v/i-2011-2014/remont/auxiliary-emission-control-systems/#emission-control-system-service-information)
14. REPLACE ECM. Refer to «REMOVAL»(/toyota/prius-v/i-2011-2014/remont/testing-diagnostics/#engine-control-system-service-information)

When the NE signal is input to the ECM, Tr is turned on, current flows to the coil of the circuit opening relay, the relay switches on, power is supplied to the fuel pump and the fuel pump operates.

While the NE signal is generated (engine running), the ECM keeps Tr on (circuit opening relay on) and the fuel pump also keeps operating.

Scheme 107

Scheme 108

Note. Inspect the fuses for circuits related to this system before performing the following inspection procedure.

1. PERFORM ACTIVE TEST USING TECHSTREAM (OPERATE C/OPN RELAY) Connect the Techstream to the DLC3. Turn the power switch on (IG). Turn the Techstream on. Enter the following menus: Powertrain / Engine and ECT / Active Test / Control the Fuel Pump / Speed. Check whether the fuel pump operation sound occurs when performing the Active Test on the Techstream. OK Fuel pump operating sound occurs. NG --> See step 2 OK --> See step 9
2. INSPECT NO. 2 INTEGRATION RELAY (C/OPN RELAY) Inspect the No. 2 integration relay (C/OPN relay). Refer to «INSPECTION»(/toyota/prius-v/i-2011-2014/remont/testing-diagnostics/#engine-control-system-service-information) . NG --> See step 10 OK: Go to next step
3. CHECK HARNESS AND CONNECTOR (NO. 2 INTEGRATION RELAY (C/OPN RELAY) - ECM) Disconnect the ECM connector. Remove the No. 2 integration relay (C/OPN relay) from the engine room relay block and junction block assembly. Disconnect the No. 2 integration relay connector. Measure the resistance according to the value(s) in the table below. Standard Resistance Tester Connection Condition Specified Condition 1B-7 - A57-8 (FC) Always Below 1 ohms 1B-7 or A57-8 (FC) - Body ground Always 10 kohms or higher NG --> REPAIR OR REPLACE HARNESS OR CONNECTOR OK: Go to next step
4. CHECK HARNESS AND CONNECTOR (NO. 2 INTEGRATION RELAY (C/OPN RELAY - IG2 RELAY)) Remove the No. 2 integration relay (C/OPN relay and IG2 relay) from the engine room relay block and junction block assembly. Disconnect the No. 2 integration relay connector. Measure the resistance according to the value(s) in the table below. Standard Resistance Tester Connection Condition Specified Condition 1B-6 - 1A-4 Always Below 1 ohms 1B-6 or 1A-4 - Body ground Always 10 kohms or higher NG --> REPAIR OR REPLACE HARNESS OR CONNECTOR OK: Go to next step
5. CHECK HARNESS AND CONNECTOR (NO. 2 INTEGRATION RELAY (C/OPN RELAY) - FUEL PUMP) Disconnect the fuel pump connector. Remove the No. 2 integration relay (C/OPN relay) from the engine room relay block and junction block assembly. Disconnect the No. 2 integration relay connector. Measure the resistance according to the value(s) in the table below. Standard Resistance Tester Connection Condition Specified Condition 1B-8 - R11-4 (B) Always Below 1 ohms 1B-8 or R11-4 (B) - Body ground Always 10 kohms or higher NG --> REPAIR OR REPLACE HARNESS OR CONNECTOR OK: Go to next step
6. CHECK HARNESS AND CONNECTOR (FUEL PUMP - BODY GROUND) Disconnect the fuel pump connector. Measure the resistance according to the value(s) in the table below. Standard Resistance Tester Connection Condition Specified Condition R11-5 (E) - Body ground Always Below 1 ohms NG --> REPAIR OR REPLACE HARNESS OR CONNECTOR OK: Go to next step
7. INSPECT FUEL PUMP Inspect the fuel pump. Refer to «INSPECTION»(/toyota/prius-v/i-2011-2014/remont/fuel-system/#fuel-system-service-information) . NG --> See step 11 OK: Go to next step
8. CHECK ECM POWER SOURCE CIRCUIT Check the ECM power source circuit. Refer to «ECM Power Source Circuit»(/toyota/prius-v/i-2011-2014/remont/testing-diagnostics/#engine-control-system-diagnostic-codes-circuit-tests) . NG --> REPAIR OR REPLACE ECM POWER SOURCE CIRCUIT OK --> See step 12
9. PROCEED TO NEXT SUSPECTED AREA SHOWN IN PROBLEM SYMPTOMS TABLE. Refer to «PROBLEM SYMPTOMS TABLE»(/toyota/prius-v/i-2011-2014/remont/testing-diagnostics/#engine-control-system-diagnostics-introduction__problem-symptoms-table)
10. REPLACE NO. 2 INTEGRATION RELAY (C/OPN RELAY). Refer to «REMOVAL - Step 2»(/toyota/prius-v/i-2011-2014/remont/testing-diagnostics/#engine-control-system-service-information)
11. REPLACE FUEL PUMP. Refer to «REMOVAL»(/toyota/prius-v/i-2011-2014/remont/fuel-system/#fuel-system-service-information)
12. REPLACE ECM. Refer to «REMOVAL»(/toyota/prius-v/i-2011-2014/remont/testing-diagnostics/#engine-control-system-service-information)

The fuel injectors are located on the intake manifold. They inject fuel into the cylinders based on the signals from the ECM.

Scheme 109

Scheme 110

1. CHECK TERMINAL VOLTAGE (POWER SOURCE OF FUEL INJECTOR ASSEMBLY) Disconnect the fuel injector assembly connectors. Turn the power switch on (IG). Measure the voltage according to the value(s) in the table below. Standard Voltage Tester Connection Condition Specified Condition D14-1 - Body ground Power switch on (IG) 11 to 14 V D15-1 - Body ground Power switch on (IG) 11 to 14 V D16-1 - Body ground Power switch on (IG) 11 to 14 V D17-1 - Body ground Power switch on (IG) 11 to 14 V TEXT IN ILLUSTRATION *a Front view of wire harness connector (to Fuel Injector Assembly) NG --> See step 4 OK: Go to next step
2. INSPECT FUEL INJECTOR ASSEMBLY Inspect the fuel injector assembly. Refer to «INSPECTION»(/toyota/prius-v/i-2011-2014/remont/fuel-system/#fuel-system-service-information) . NG --> See step 5 OK: Go to next step
3. CHECK HARNESS AND CONNECTOR (FUEL INJECTOR ASSEMBLY - ECM) Disconnect the fuel injector assembly connectors. Disconnect the ECM connector. Measure the resistance according to the value(s) in the table below. Standard Resistance Tester Connection Condition Specified Condition D14-2 - D28-85 (#10) Always Below 1 ohms D15-2 - D28-84 (#20) Always Below 1 ohms D16-2 - D28-83 (#30) Always Below 1 ohms D17-2 - D28-82 (#40) Always Below 1 ohms D14-2 or D28-85 (#10) - Body ground Always 10 ohms or higher D15-2 or D28-84 (#20) - Body ground Always 10 ohms or higher D16-2 or D28-83 (#30) - Body ground Always 10 ohms or higher D17-2 or D28-82 (#40) - Body ground Always 10 ohms or higher NG --> REPAIR OR REPLACE HARNESS OR CONNECTOR OK --> See step 6
4. CHECK HARNESS AND CONNECTOR (NO. 2 INTEGRATION RELAY (IG2 RELAY) - FUEL INJECTOR ASSEMBLY) Disconnect the fuel injector assembly connectors. Remove the No. 2 integration relay (IG2 relay) from the engine room relay block and junction block assembly. Disconnect the No. 2 integration relay connector. Measure the resistance according to the value(s) in the table below. Standard Resistance Tester Connection Condition Specified Condition D14-1 - 1A-4 Always Below 1 ohms D15-1 - 1A-4 Always Below 1 ohms D16-1 - 1A-4 Always Below 1 ohms D17-1 - 1A-4 Always Below 1 ohms D14-1 or 1A-4 - Body ground Always 10 kohms or higher D15-1 or 1A-4 - Body ground Always 10 kohms or higher D16-1 or 1A-4 - Body ground Always 10 kohms or higher D17-1 or 1A-4 - Body ground Always 10 kohms or higher NG --> REPAIR OR REPLACE HARNESS OR CONNECTOR OK --> See step 7
5. REPLACE FUEL INJECTOR ASSEMBLY. Refer to «REMOVAL»(/toyota/prius-v/i-2011-2014/remont/fuel-system/#fuel-system-service-information)
6. PROCEED TO NEXT SUSPECTED AREA SHOWN IN PROBLEM SYMPTOMS TABLE. Refer to «PROBLEM SYMPTOMS TABLE»(/toyota/prius-v/i-2011-2014/remont/testing-diagnostics/#engine-control-system-diagnostics-introduction__problem-symptoms-table)
7. CHECK ECM POWER SOURCE CIRCUIT. Refer to «ECM Power Source Circuit»(/toyota/prius-v/i-2011-2014/remont/testing-diagnostics/#engine-control-system-diagnostic-codes-circuit-tests)

The MIL (Malfunction Indicator Lamp) is used to indicate vehicle malfunction detected by the ECM. When the power switch is turned on (IG), power is supplied to the MIL circuit, and the ECM provides the circuit ground which illuminates the MIL.

The MIL operation can be checked visually: When the power switch is turned on (IG), the MIL should illuminate and should then turn off after turn the power switch on (READY). If the MIL remains illuminated or is not illuminated, conduct the following troubleshooting procedure using the Techstream.

Scheme 111

1. CHECK THAT MIL IS ILLUMINATED Turn the power switch on (IG). Check the illumination of the MIL. RESULT Condition Proceed to MIL remains illuminated (Even after power switch is turned on (IG) and several seconds have passed, MIL still remains illuminated) A MIL remains off (Does not illuminate at all) B MIL illuminates and should turn off after power switch on (READY) C B --> See step 5 C --> See step 8 A: Go to next step
2. CHECK WHETHER MIL TURNS OFF Connect the Techstream to the DLC3. Turn the power switch on (IG). Turn the Techstream on. Enter the following menus: Powertrain / Engine and ECT / Trouble Codes. Check if any DTCs have been stored. Note down the DTCs. Clear the DTCs. Refer to «DTC CHECK / CLEAR»(/toyota/prius-v/i-2011-2014/remont/testing-diagnostics/#engine-control-system-diagnostics-introduction__dtc-check-clear) . Check if the MIL goes off. OK MIL goes off. NG --> See step 3 OK --> See step 9
3. CHECK HARNESS AND CONNECTOR (CHECK FOR SHORT IN WIRE HARNESS) Disconnect the A57 ECM connector. Turn the power switch on (IG). Check that the MIL is not illuminated. OK MIL is not illuminated. NG --> See step 4 OK --> See step 10
4. CHECK HARNESS AND CONNECTOR (COMBINATION METER SUB-ASSEMBLY - ECM) Disconnect the combination meter sub-assembly connector. Disconnect the ECM connector. Measure the resistance according to the value(s) in the table below. Standard Resistance Tester Connection Condition Specified Condition L27-6 (EFI) or A57-36 (W) - Body ground Always 10 kohms or higher NG --> REPAIR OR REPLACE HARNESS OR CONNECTOR OK --> See step 11
5. CHECK THAT ENGINE STARTS Turn the power switch on (IG). Put the engine in inspection mode (maintenance mode). Refer to «INSPECTION MODE PROCEDURE»(/toyota/prius-v/i-2011-2014/remont/hoistjack/#introduction) . Start the engine. Result Result Proceed to Engine starts A Engine cannot be put in inspection mode* (Engine cannot start) B HINT: *: The Techstream cannot communicate with the ECM. B --> See step 12 A: Go to next step
6. CHECK HARNESS AND CONNECTOR (ECM TERMINAL VOLTAGE) Disconnect the ECM connector. Turn the power switch on (IG). Measure the voltage according to the value(s) in the table below. Standard Voltage Tester Connection Condition Specified Condition A57-36 (W) - Body ground Power switch on (IG) 11 to 14 V NG --> See step 7 OK --> See step 10
7. CHECK HARNESS AND CONNECTOR (COMBINATION METER SUB-ASSEMBLY - ECM) Disconnect the combination meter sub-assembly connector. Disconnect the ECM connector. Measure the resistance according to the value(s) in the table below. Standard Resistance Tester Connection Condition Specified Condition L27-6 (EFI) - A57-36 (W) Always Below 1 ohms NG --> REPAIR OR REPLACE HARNESS OR CONNECTOR OK --> See step 11
8. CHECK FOR INTERMITTENT PROBLEMS. Refer to «CHECK FOR INTERMITTENT PROBLEMS»(/toyota/prius-v/i-2011-2014/remont/testing-diagnostics/#engine-control-system-diagnostics-introduction__check-for-intermittent-problems)
9. REPAIR CIRCUITS INDICATED BY OUTPUT DTCS. Refer to «DIAGNOSTIC TROUBLE CODE CHART»(/toyota/prius-v/i-2011-2014/remont/testing-diagnostics/#engine-control-system-diagnostics-introduction__diagnostic-trouble-code-chart)
10. REPLACE ECM. Refer to «REMOVAL»(/toyota/prius-v/i-2011-2014/remont/testing-diagnostics/#engine-control-system-service-information)
11. REPLACE METER CIRCUIT PLATE. Refer to «DISASSEMBLY - Step 3»(/toyota/prius-v/i-2011-2014/remont/gauges-instrument-panels/#meter-gauge-display-service-information)
12. GO TO VC OUTPUT CIRCUIT. Refer to «VC Output Circuit»(/toyota/prius-v/i-2011-2014/remont/testing-diagnostics/#engine-control-system-diagnostic-codes-circuit-tests)

See also:
• DTC CHECK / CLEAR
• INSPECTION MODE PROCEDURE
• REMOVAL
• DIAGNOSTIC TROUBLE CODE CHART
• REMOVAL
• DATA LIST / ACTIVE TEST
• ON-VEHICLE INSPECTION
• PROCEDURE - Step 2
• CHECK FOR INTERMITTENT PROBLEMS
• ON-VEHICLE INSPECTION - Step 1
• REGISTRATION
• ON-VEHICLE INSPECTION - Step 2
• REPLACEMENT
• CHECKING MONITOR STATUS
• ON-VEHICLE INSPECTION - Step 2
• INSPECTION
• ON-VEHICLE INSPECTION - Step 3
• ON-VEHICLE INSPECTION - Step 8
• HOW TO PROCEED WITH TROUBLESHOOTING
• REMOVAL
• PROBLEM SYMPTOMS TABLE
• HOW TO PROCEED WITH TROUBLESHOOTING
• DISASSEMBLY - Step 3
• DESCRIPTION
• WIRING DIAGRAM