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Engine Control System (2GR-FE) (Diagnostic Codes (P0451-P2A00) & Circuit Tests)): Diagnosis Toyota RAV4 IV

Testing & Diagnostics 47 illustrations ~13458 words

DTC SUMMARY

DTCMonitoring ItemMalfunction Detection ConditionTrouble AreaDetection TimingDetection Logic
P0451Canister pressure sensor signal noiseSensor output voltage fluctuates frequently within certain time period.Canister pump module Connector/wire harness (Canister pump module - ECM) EVAP system hose (pipe from air inlet port to canister pump module, canister filter, fuel tank vent hose) ECMEVAP monitoring (ignition switch off) Engine running2 trip
Canister pressure sensor signal becomes fixed/flatSensor output voltage does not vary within certain time period.Canister pump module Connector/wire harness (Canister pump module - ECM) EVAP system hose (pipe from air inlet port to canister pump module, canister filter, fuel tank vent hose) ECMEVAP monitoring (ignition switch off)2 trip
P0452Canister pressure sensor low inputEVAP pressure less than 42.1 kPa for 0.5 seconds.Canister pump module Connector/wire harness (Canister pump module - ECM) EVAP system hose (pipe from air inlet port to canister pump module, canister filter, fuel tank vent hose) ECMIgnition switch ON EVAP monitoring (ignition switch off)1 trip
P0453Canister pressure sensor high inputEVAP pressure more than 123.8 kPa for 0.5 seconds.Canister pump module Connector/wire harness (Canister pump module - ECM) EVAP system hose (pipe from air inlet port to canister pump module, canister filter, fuel tank vent hose) ECMIgnition switch ON EVAP monitoring (ignition switch off)1 trip

HINT

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

INSPECTION PROCEDURE

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.

Scheme 617

Scheme 617: PROCEDURE
Scheme 617: PROCEDURE

Scheme 618

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Scheme 618

Scheme 619

Scheme 619
Scheme 619

Scheme 620

Scheme 620
Scheme 620
  1. CONFIRM DTC AND EVAP PRESSURE Connect the Techstream to the DLC3. Turn the ignition switch to ON (do not start the engine). Turn the Techstream ON. Select the following menu items: Powertrain / Engine and ECT / Trouble Code. Read DTCs. Select the following menu items: Powertrain / Engine and ECT / Data List / EVAP / 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 45 kPa-a (337.3 mmHg-a) Wire harness/connector (ECM - Canister pressure sensor) Canister pressure sensor Short in ECM circuit A P0453 More than 120 kPa-a (900 mmHg-a) 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 WIRE HARNESS (CANISTER PUMP MODULE - ECM) Turn the ignition switch off. Disconnect the B30 ECM connector. Measure the resistance between terminal 121 (PPMP) of the ECM connector and body ground. Result Test Result Suspected Trouble Area Proceed to 10 ohms or less Wire harness/connector (ECM - Canister pressure sensor) Short in canister pressure sensor circuit A 10 kohms or more Wire harness/connector (ECM - Canister pressure sensor) Short in ECM circuit B Reconnect the ECM connector. B --> See step 8 A: Go to next step
  3. CHECK WIRE HARNESS (CANISTER PUMP MODULE - ECM) Disconnect the S3 canister pump module connector. Disconnect the B30 ECM connector. Measure the resistance between terminal 121 (PPMP) of the ECM connector and body ground. Result Test Result Suspected Trouble Area Proceed to 10 kohms or more Short in canister pressure sensor circuit A 10 ohms or less Short in wire harness/connector (ECM - Canister pressure sensor) B Reconnect the canister pump module connector. Reconnect the ECM connector. A --> See step 6 B --> See step 7
  4. GO TO EVAP SYSTEM. Refer to «EVAP System»(ref-493463-S33769003022012081000000)
  5. CHECK WIRE HARNESS (CANISTER PUMP MODULE - ECM) Disconnect the S3 canister pump module connector. Turn the ignition switch to ON. Measure the voltage and resistance of the canister connector. Standard Tester Connection Specified Condition S3-4 (VCC) - Body ground 4.5 to 5.5 V S3-3 (VOUT) - Body ground 4.5 to 5.5 V S3-2 (SGND) - Body ground 100 ohms or less 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 Reconnect the canister pump module connector. A --> See step 6 B --> See step 7
  6. REPLACE CANISTER ASSEMBLY Replace the canister assembly.Refer to «REMOVAL»(ref-493427-S22464123852012081000000) . 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. NEXT --> See step 9
  7. REPAIR OR REPLACE HARNESS OR CONNECTOR HINT: If the exhaust tailpipe has been removed, go to the next step before reinstalling it. NEXT --> See step 9
  8. REPLACE ECM Replace the ECM.Refer to «REMOVAL»(ref-493466-S41904497902012081000000) . NEXT: Go to next step
  9. CHECK WHETHER DTC OUTPUT RECURS (AFTER REPAIR) Connect the Techstream to the DLC3. Turn the ignition switch to ON and turn the Techstream ON. Clear the DTCs.Refer to «DTC CHECK / CLEAR»(ref-493460-S06003279822012081000000) . Turn the ignition switch off and wait for at least 30 seconds. Turn the ignition switch to ON and turn the Techstream ON. Perform the Evaporative System Check using the Techstream, referring to the Confirmation Driving Pattern. (i) Enter the following menus: Powertrain / Engine and ECT / Utility / All Readiness. On the Techstream, select the following menu items: Powertrain / Engine and ECT / Trouble Codes / Pending. Input the DTC: P0451, P0452 or P0453. Check the DTC judgment result. RESULT Tester 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 --> COMPLETED
DTCsMonitoring ItemMalfunction Detection ConditionTrouble AreaDetection TimingDetection Logic
P0455EVAP gross leakLeak detection pump creates negative pressure (vacuum) in EVAP system and EVAP system pressure measured. Reference pressure measured at start and at end of leak check. If stabilized pressure higher than [second reference pressure x 0.2], ECM determines that EVAP system has large leak.Fuel tank cap (loose) Leakage from EVAP line (Canister - Fuel tank) Leakage from EVAP line (Purge VSV - Canister) Canister pump module Leakage from fuel tank Leakage from canisterWhile ignition switch off2 trip
P0456EVAP small leakLeak detection pump creates negative pressure (vacuum) in EVAP system and EVAP system pressure measured. Reference pressure measured at start and at end of leak check. If stabilized pressure higher than second reference pressure, ECM determines that EVAP system has small leak.Fuel tank cap (loose) Leakage from EVAP line (Canister - Fuel tank) Leakage from EVAP line (Purge VSV - Canister) Canister pump module Leakage from fuel tank Leakage from canisterWhile ignition switch off2 trip

Refer to EVAP System.Refer to INSPECTION PROCEDURE .

HINT

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.

Scheme 621

Scheme 621: PROCEDURE
Scheme 621: PROCEDURE

Scheme 622

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Scheme 622

Scheme 623

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Scheme 623

Scheme 624

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Scheme 625

Scheme 625
Scheme 625
  1. CHECK OPERATION OF SPEEDOMETER Drive the vehicle and check whether the operation of the speedometer in the combination meter is normal. HINT: The vehicle speed sensor is operating normally if the speedometer reading is normal. If the speedometer does not operate, check it by following the procedure described in Speedometer Malfunction.Refer to «Speedometer Malfunction»(ref-493451-S22596425342012081000000) . NG --> See step 8 OK: Go to next step
  2. READ VALUE USING TECHSTREAM (VEHICLE SPD) Connect the Techstream to the DLC3. Turn the ignition switch to ON. Turn the Techstream ON. Select the following menu items: Powertrain / Engine and ECT / Data List / Vehicle Speed. Drive the vehicle. Read the value displayed on the Techstream. OK Vehicle speeds displayed on Techstream and speedometer display are equal. NG --> See step 3 OK --> See step 10
  3. CHECK WIRE HARNESS (COMBINATION METER ASSEMBLY - ECM) Disconnect the E19 combination meter connector. Disconnect the A9 ECM connector. Measure the resistance according the value(s) in the table below. Standard Resistance (Check for open) Tester Connection Condition Specified Condition E19-39 (+S) - A9-13 (SPD) Always Below 1 ohms Standard Resistance (Check for open) Tester Connection Condition Specified Condition E19-39 (+S) or A9-13 (SPD) - Body ground Always 10 kohms or higher HINT: If the wire has a short, check the speed signal circuit in other systems related to the vehicle speed signal (e.g. tire pressure warning system, audio system, etc.). Reconnect the combination meter connector. Reconnect the ECM connector. NG --> REPAIR OR REPLACE HARNESS OR CONNECTOR (OTHER SYSTEMS RELATED TO SPEED SIGNAL) OK: Go to next step
  4. CHECK COMBINATION METER ASSEMBLY (+S VOLTAGE) Disconnect the E19 combination meter connector. Turn the ignition switch to ON. Measure the voltage between the terminal of the combination meter and body ground. Standard voltage Tester Connection Specified Condition E19-39 (+S) - Body ground 4.5 to 5.5 V Reconnect the combination meter connector. NG --> See step 9 OK: Go to next step
  5. CHECK COMBINATION METER ASSEMBLY (SPD SIGNAL OUTPUT WAVEFORM) Remove the combination meter. Connect the E19 combination meter connector. Move the shift lever to N. Jack up the vehicle. Turn the ignition switch to ON. Check the voltage between the terminal of the combination meter and the body ground while the wheel is turned slowly. Standard Voltage Tester Connection Switch Condition Specified Condition E19-39 (+S) - Body ground Ignition switch ON (Wheel turned slowly) Voltage generated intermittently HINT: The output voltage fluctuates up and down, similarly to the diagram, when the wheel is turned slowly. A voltage of 12 V or 5 V is output from each ECU and then input to the combination meter assembly. Reinstall the combination meter. NG --> See step 6 OK --> See step 11
  6. CHECK COMBINATION METER ASSEMBLY (SPD SIGNAL INPUT WAVEFORM) Remove the combination meter. Connect the combination meter connector. Move the shift lever to N. Jack up the vehicle. Turn the ignition switch to ON. Check the voltage between the terminal of the combination meter and the body ground while the wheel is turned slowly. Standard Voltage Tester Connection Switch Condition Specified Condition E19-38 (SI) - Body ground Ignition switch ON (Wheel turned slowly) Voltage generated intermittently HINT: The output voltage fluctuates up and down, similarly to the diagram, when the wheel is turned slowly. Reinstall the combination meter. NG --> See step 7 OK --> See step 12
  7. CHECK HARNESS AND CONNECTOR (COMBINATION METER - SKID CONTROL ECU) Disconnect the E19 combination meter connector. Disconnect the E19 skid control ECU connector. Measure the resistance according the value(s) in the table below. Standard Resistance (Check for open) Tester Connection Condition Specified Condition E19-38 (SI) - A19-11 (SP1) Always Below 1 ohms Standard Resistance (Check for open) Tester Connection Condition Specified Condition E19-38 (SI) or A19-11 (SP1) - Body ground Always 10 kohms or higher Reconnect the combination meter connector. Reconnect the skid control ECU connector. NG --> REPAIR OR REPLACE HARNESS OR CONNECTOR OK --> See step 13
  8. GO TO MALFUNCTION IN SPEEDOMETER. Refer to «Speedometer Malfunction»(ref-493451-S22596425342012081000000)
  9. REPLACE ECM. Refer to «REMOVAL»(ref-493466-S41904497902012081000000)
  10. CHECK FOR INTERMITTENT PROBLEMS. Refer to «CHECK FOR INTERMITTENT PROBLEMS»(ref-493460-S14877818602012081000000)
  11. REPLACE ECM. Refer to «REMOVAL»(ref-493466-S41904497902012081000000)
  12. REPLACE COMBINATION METER. Refer to «REMOVAL»(ref-493452-S15960994972012081000000)
  13. REPLACE SKID CONTROL ECU. Refer to «REMOVAL»(ref-493387-S03692503262012081000000)

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. STP signal conditions can be checked using the Techstream. Connect the Techstream to the DLC3. Turn the ignition switch to ON. Turn the Techstream on. Enter the following menus: Powertrain / Engine and ECT / All Data / Stop Light Switch and ST1. Check the Data List indication when the brake pedal is depressed and released.
Brake Pedal OperationStop Light SwitchST1
DepressedONON
ReleasedOFFOFF

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

Scheme 626

Scheme 626: PROCEDURE
Scheme 626: PROCEDURE

Scheme 627

Scheme 627
Scheme 627

Scheme 628

Scheme 628
Scheme 628
  1. CHECK STOP LIGHT SWITCH ASSEMBLY (TERMINAL B VOLTAGE) Disconnect the A3 stop light switch connector. Measure the voltage between the terminals of the A3 stop light switch connector and body ground. Standard voltage Tester Connection Condition Specified Condition A3-2 - Body ground Always 11 to 14 V A3-4 - Body ground Ignition switch ON 11 to 14 V Reconnect the stop light switch connector. NG --> See step 4 OK: Go to next step
  2. INSPECT STOP LIGHT SWITCH ASSEMBLY Inspect the stop light switch.Refer to «INSPECTION»(ref-493453-S33162559662012081000000) . NG --> See step 5 OK: Go to next step
  3. CHECK ECM (STP AND ST1- VOLTAGE) Disconnect the A9 ECM connector. Turn the ignition switch to ON. Measure the voltage between terminals ST1- and STP of the A9 ECM connector and body ground. Standard voltage Tester Connection Brake Pedal Operation Specified Condition A9-35 (ST1-) - Body ground Released 11 to 14 V Depressed 0 to 3 V A9-36 (STP) - Body ground Released 0 to 3 V Depressed 11 to 14 V Reconnect the ECM connector. NG --> REPAIR OR REPLACE HARNESS OR CONNECTOR OK --> See step 6
  4. INSPECT FUSE (STOP AND IGN FUSE) Remove the STOP and IGN fuses from the instrument panel junction block. Measure the resistance. Standard resistance Below 1 ohms Reinstall the STOP and IGN fuses. NG --> CHECK FOR SHORTS IN ALL HARNESSES AND CONNECTORS CONNECTED TO FUSE AND REPLACE FUSE OK --> REPAIR OR REPLACE HARNESS OR CONNECTOR
  5. REPLACE STOP LIGHT SWITCH ASSEMBLY. Refer to «REMOVAL»(ref-493453-S37294564642012081000000)
  6. REPLACE ECM. Refer to «REMOVAL»(ref-493466-S41904497902012081000000)

HINT

  1. The following conditions may also cause DTC P0505 to be set: 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. 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.

HINT

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.

Scheme 629

Scheme 629: PROCEDURE
Scheme 629: PROCEDURE
  1. CHECK ANY OTHER DTCS OUTPUT (IN ADDITION TO DTC P050A) Connect the Techstream to the DLC3. Turn the ignition switch to ON. Turn the Techstream ON. Select the following menu items: Powertrain / Engine and ECT / Trouble Code. Read the DTCs. Result Display (DTC Output) Proceed to P050A A P050A and other DTCs B HINT: If any DTCs other than P050A are output, troubleshoot those DTCs first. NG --> See step 20 OK: 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. Connect the Techstream to the DLC3. Start the engine and warm it up. Turn the Techstream ON. Select the following menu items: Powertrain / Engine and ECT / Data List / A/F Control System / Short FT #1 and Long FT #1, or Short FT #2 and Long FT #2. Read the values displayed on the Techstream. Add together the Short FT #1 and Long FT #1, or Short FT #2 and Long FT #2 values to obtain the total fuel trim. OK Total of Short FT #1 and Long FT #1, or Short FT #2 and Long FT #2 values is between -20% and 20%. NG --> See step 5 OK: Go to next step
  3. CHECK THROTTLE BODY Check for deposits around the throttle valve, and the throttle valve condition. OK No deposits around throttle valve and throttle valve moves smoothly. OK --> See step 14 NG --> See step 4
  4. REPAIR OR REPLACE THROTTLE BODY ASSEMBLY Repair or replace the throttle body assembly.Refer to «REMOVAL»(ref-493466-S05114120172012081000000) . NEXT --> See step 14
  5. CHECK PCV HOSE CONNECTIONS Check the PCV hose connections. OK PCV hose is connected correctly and is not damaged. NG --> See step 10 OK: Go to next step
  6. CHECK AIR INDUCTION SYSTEM Check the air induction system for vacuum leakage. OK No leakage from air induction system. NG --> See step 11 OK: Go to next step
  7. CHECK AIR CLEANER FILTER ELEMENT SUB-ASSEMBLY Visually check that the air cleaner filter element is not excessively contaminated with dirt or oil. OK Air cleaner filter element is not excessively contaminated with dirt or oil. NG --> See step 12 OK: Go to next step
  8. PERFORM ACTIVE TEST USING TECHSTREAM (OPERATE OCV) Connect the Techstream to the DLC3. Start the engine. Turn the Techstream on. Warm up the engine. Enter the following menus: Powertrain / Engine and ECT / Active Test / Control the VVT System (Bank 1). Check the engine speed while operating the Oil Control Valve (OCV) using the Techstream. OK Tester Operation Specified Condition OCV OFF Normal engine speed OCV ON Engine idles roughly or stalls (soon after OCV switched from OFF to ON) NG --> See step 13 OK: Go to next step
  9. READ VALUE USING TECHSTREAM (MAF) Connect the Techstream to the DLC3. Turn the ignition switch to ON. Turn the Techstream on. Enter the following menus: Powertrain / Engine and ECT / Data List / All Data / MAF and Coolant Temp. Allow the engine to idle until Coolant Temp reaches 75°C (167°F) or higher. Read MAF with the engine speed at 3000 rpm. Standard Between 11.00 gm/s. and 16.00 gm/s. (shift lever: N; A/C: Off). OK --> See step 14 NG --> See step 15
  10. REPAIR OR REPLACE PCV HOSE Repair or replace the PCV hose. NEXT --> See step 14
  11. REPAIR OR REPLACE AIR INDUCTION SYSTEM Repair or replace the air induction system. NEXT --> See step 14
  12. REPLACE AIR CLEANER FILTER ELEMENT SUB-ASSEMBLY Replace the air cleaner filter element sub-assembly. NEXT --> See step 14
  13. CHECK AND REPAIR VVT SYSTEM Check and repair the VVT system. NEXT: Go to next step
  14. 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 ignition switch to ON. Turn the Techstream on. Clear DTCs.Refer to «DTC CHECK / CLEAR»(ref-493460-S06003279822012081000000) . Turn the ignition switch off. Turn the ignition switch to ON and turn the Techstream on. Enter the following menus: Powertrain / Engine and ECT / Data List / Coolant Temp. Check that the engine coolant temperature is between -10°C and 50°C (14 and 122°F). Start the engine and warm it up. Drive the vehicle in accordance with the driving pattern described in 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 15 A --> See step 22
  15. CHECK HARNESS AND CONNECTOR Check the connection and terminal contact pressure of connectors and wire harnesses between the mass air flow meter and ECM.Refer to «ELECTRONIC CIRCUIT INSPECTION PROCEDURE»(ref-493289-S18206983812012081000000) . HINT: Repair any problems. NEXT: Go to next step
  16. CHECK WHETHER DTC OUTPUT RECURS 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 ignition switch to ON. Turn the Techstream on. Clear DTCs.Refer to «DTC CHECK / CLEAR»(ref-493460-S06003279822012081000000) . Turn the ignition switch off. Turn the ignition switch to ON and turn the Techstream on. Enter the following menus: Powertrain / Engine and ECT / Data List / Coolant Temp. Check that the engine coolant temperature is between -10°C and 50°C (14 and 122°F). Start the engine and warm it up. Drive the vehicle in accordance with the driving pattern described in 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 ABNORMAL (DTC P050A is output) A NORMAL (DTC is not output) B B --> END A: Go to next step
  17. CHECK HARNESS AND CONNECTOR (MASS AIR FLOW METER - ECM) Disconnect the B1 mass air flow meter connector. Disconnect the B30 ECM connector. Measure the resistance according to the value(s) in the table below. Standard Resistance Tester Connection Condition Specified Condition B1-5 (VG) - B30-74 (VG) Always Below 1 ohms B1-4 (E2G) - B30-75 (E2G) Always Below 1 ohms B1-5 (VG) or B30-74 (VG) - Body ground Always 10 kohms or higher NG --> REPAIR OR REPLACE HARNESS OR CONNECTOR OK: Go to next step
  18. REPLACE MASS AIR FLOW METER Replace the mass air flow meter.Refer to «REMOVAL»(ref-493466-S37228417242012081000000) . HINT: If the result of the inspection performed in step 9 indicated no problem, proceed to the next step without replacing the mass air flow meter assembly. NEXT: Go to next step
  19. CONFIRM WHETHER MALFUNCTION HAS BEEN SUCCESSFULLY REPAIRED 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 ignition switch to ON. Turn the Techstream on. Clear DTCs.Refer to «DTC CHECK / CLEAR»(ref-493460-S06003279822012081000000) . Turn the ignition switch off. Turn the ignition switch to ON and turn the Techstream on. Enter the following menus: Powertrain / Engine and ECT / Data List / Coolant Temp. Check that the engine coolant temperature is between -10°C and 50°C (14 and 122°F). Start the engine and warm it up. Drive the vehicle in accordance with the driving pattern described in 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 --> END
  20. GO TO DTC CHART. Refer to «DIAGNOSTIC TROUBLE CODE CHART»(ref-493460-S19564278272012081000000)
  21. REPLACE ECM. Refer to «REMOVAL»(ref-493466-S41904497902012081000000)
  22. CHECK FOR INTERMITTENT PROBLEMS. Refer to «CHECK FOR INTERMITTENT PROBLEMS»(ref-493460-S14877818602012081000000)

HINT

  1. DTC P050B may be set when the engine shows the symptoms listed below. If necessary, check the trouble areas listed below. Symptoms Factor Trouble Area Low idle speed when engine cold Excessive engine friction Engine oil deterioration Drive belt tension A/C compressor Generator Rough idle when engine cold 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 be helpful in determining whether the vehicle was moving or stationary, 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.

HINT

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.

Scheme 630

Scheme 630: PROCEDURE
Scheme 630: PROCEDURE

Scheme 631

Scheme 631
Scheme 631
  1. CHECK FUSE (EFI MAIN AND P/I) Remove the EFI MAIN fuse and P/I fuse from the engine room No. 1 relay block. Measure the resistance of the EFI MAIN fuse and P/I fuse. Standard resistance Below 1 ohms Reinstall the EFI MAIN fuse and P/I fuse. NG --> CHECK FOR SHORTS IN ALL HARNESSES AND CONNECTORS CONNECTED TO FUSE AND REPLACE FUSE OK: Go to next step
  2. CHECK WIRE HARNESS (ECM - EFI MAIN FUSE, EFI MAIN FUSE - BATTERY) Check the harness and the connector between the EFI MAIN fuse and ECM. Remove the EFI MAIN fuse from the engine room No. 1 relay block. Disconnect the A9 ECM connector. Measure the resistance. Standard resistance Tester Connection Specified Condition EFI MAIN fuse terminal 2 - A9-1 (BATT) Below 1 ohms EFI MAIN fuse terminal 2 or A9-1 (BATT) - Body ground 10 kohms or higher Reconnect the ECM connector. Reinstall the EFI MAIN fuse. Check the harness and the connector between the EFI MAIN fuse and battery. Remove the EFI MAIN fuse from the engine room No. 1 relay block. Disconnect the cable from the positive (+) battery terminal. Measure the resistance. Standard resistance Tester Connection Specified Condition Battery positive terminal - EFI MAIN fuse terminal 1 Below 1 ohms Battery positive terminal or EFI MAIN fuse terminal 1- Body ground 10 kohms or higher Reconnect the cable to the positive (+) battery terminal. Reinstall the EFI MAIN fuse. NG --> REPAIR OR REPLACE HARNESS OR CONNECTOR OK: Go to next step
  3. INSPECT BATTERY Check that the battery is not depleted. OK Battery is not depleted. NG --> REPLACE BATTERY OK: Go to next step
  4. CHECK BATTERY TERMINAL Check that the battery terminals are not loose or corroded. OK Battery terminals are not loose or corroded. NG --> REPAIR OR REPLACE BATTERY TERMINAL OK: Go to next step
  5. CHECK WHETHER DTC OUTPUT RECURS Connect the Techstream to the DLC3. Turn the ignition switch to ON and turn the Techstream ON. Clear DTCs.Refer to «DTC CHECK / CLEAR»(ref-493460-S06003279822012081000000) . Turn the ignition switch off and turn the Techstream off. Start the engine and turn the Techstream ON. Select the following menu items: Powertrain / Engine and ECT / Trouble Code. Read DTCs. Result Display (DTC Output) Proceed to P0560 A No output B B --> See step 6 A --> See step 7
  6. CHECK FOR INTERMITTENT PROBLEMS. Refer to «CHECK FOR INTERMITTENT PROBLEMS»(ref-493460-S14877818602012081000000)
  7. REPLACE ECM. Refer to «REMOVAL»(ref-493466-S41904497902012081000000)

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.

HINT

  1. The following troubleshooting flowchart is based on the premise that the engine can be cranked normally. If the engine does not crank, proceed to the problem symptoms table.Refer to «PROBLEM SYMPTOMS TABLE»(ref-493460-S25464997372012081000000) .
  2. 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.

Scheme 632

Scheme 632: PROCEDURE
Scheme 632: PROCEDURE
  1. READ VALUE USING TECHSTREAM (STARTER SIGNAL) Connect the Techstream to the DLC3. Turn the ignition switch to ON and turn the Techstream ON. Select the following menu items: Powertrain / Engine and ECT / Data List / Starter Signal. Check the value displayed on the Techstream when the ignition switch is turned to ON or the engine is started. OK Condition STARTER SIG Ignition switch turned to ON OFF Engine started ON NG --> See step 2 OK --> See step 5
  2. INSPECT PARK/NEUTRAL POSITION SWITCH ASSEMBLY Disconnect the B26 PNP switch connector. Measure the resistance when the transmission gear selector lever is moved to each position. Standard resistance Gear Selector Lever Position Tester Connection Specified Condition P 2 (RB) - 6 (PL), 4 (B) - 5 (L) Below 1 ohms R 1 (RL) - 2 (RB) Below 1 ohms N 2 (RB) - 9 (NL), 4 (B) - 5 (L) Below 1 ohms D or 4 2 (RB) - 7 (DL) Below 1 ohms 3 2 (RB) - 3 (2L) Below 1 ohms L or 2 2 (RB) - 8 (LL) Below 1 ohms Reconnect the PNP switch connector. NG --> REPLACE PARK/NEUTRAL POSITION SWITCH ASSEMBLY OK: Go to next step
  3. REPAIR OR REPLACE HARNESS AND CONNECTOR (PNP SWITCH - STA TERMINAL OF ECM) NEXT: Go to next step
  4. CHECK WHETHER DTC OUTPUT RECURS Connect the Techstream to the DLC3. Turn the ignition switch to ON. Turn the Techstream ON. Clear DTCs.Refer to «DTC CHECK / CLEAR»(ref-493460-S06003279822012081000000) . Drive the vehicle at more than 20 km/h (12.43 mph) for over 20 seconds. Select the following menu items: Powertrain / Engine and ECT / Trouble Code. Read DTCs. Result Display (DTC Output) Proceed to P0617 A No DTC B B --> END A --> See step 6
  5. CHECK FOR INTERMITTENT PROBLEMS. Refer to «CHECK FOR INTERMITTENT PROBLEMS»(ref-493460-S14877818602012081000000)
  6. REPLACE ECM. Refer to «REMOVAL»(ref-493466-S41904497902012081000000)

HINT

Using Techstream to read the Data List allows switch, sensor, actuator and other item values to be read without removing any parts. Reading the Data List early in troubleshooting is one way to save time.

Note. In the table below, the values listed under "Normal Condition" are reference values. Do not depend solely on these reference values when deciding whether a part is faulty or not.

  1. Warm up the engine.
  2. Turn the ignition switch off.
  3. Connect the Techstream to the DLC3.
  4. Turn the ignition switch to ON.
  5. Turn Techstream ON.
  6. Enter the following menus: Powertrain / Engine and ECT / Data List.
  7. Follow the instructions on the Techstream and read the Data List.
ItemMeasurement Item/Range (Display)Normal ConditionDiagnostic Note
Stop Light SwitchStop light switch status/ON or OFFBrake pedal is depressed: ON Brake pedal is released: OFF

Scheme 633

Scheme 633: PROCEDURE
Scheme 633: PROCEDURE
  1. INSPECT STOP LIGHT SWITCH Inspect the stop light switch.Refer to «INSPECTION»(ref-493453-S33162559662012081000000) . NG --> See step 4 OK: Go to next step
  2. CHECK WIRE HARNESS (ECM - BATTERY) Measure the voltage of the wire harness side connector. Standard voltage Tester Connection Condition Specified Condition A9-36 (STP) - Body ground Brake pedal is depressed 11 to 14 V A9-36 (STP) - Body ground Brake pedal is released 0 to 3 V NG --> REPAIR OR REPLACE HARNESS OR CONNECTOR OK --> See step 3
  3. REPLACE ECM. Refer to «REMOVAL»(ref-493466-S41904497902012081000000)
  4. REPLACE STOP LIGHT SWITCH. Refer to «REMOVAL»(ref-493453-S37294564642012081000000)

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.
  1. 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 ETCS malfunctions.

Scheme 634

Scheme 634: PROCEDURE
Scheme 634: PROCEDURE

Scheme 635

Scheme 635
Scheme 635
  1. INSPECT THROTTLE BODY (RESISTANCE OF THROTTLE ACTUATOR) Disconnect the B3 throttle body connector. Measure the resistance of the throttle actuator. Standard resistance Tester Connection Specified Condition 2 (M+) - 1 (M-) 0.3 to 100 ohms at 20°C (68°F) Reconnect the throttle body connector. NG --> See step 5 OK: Go to next step
  2. CHECK WIRE HARNESS (THROTTLE ACTUATOR - ECM) Disconnect the B3 throttle body connector. Disconnect the B30 ECM connector. Measure the resistance. Standard resistance Tester Connection Specified Condition B3-2 (M+) - B30-19 (M+) Below 1 ohms B3-1 (M-) - B30-18 (M-) Below 1 ohms B3-2 (M+) or B30-19 (M+) - Body ground 10 kohms or higher B3-1 (M-) or B30-18 (M-) - Body ground 10 kohms or higher Reconnect the throttle body connector. Reconnect the ECM connector. NG --> REPAIR OR REPLACE HARNESS OR CONNECTOR OK: Go to next step
  3. INSPECT THROTTLE BODY ASSEMBLY Check for foreign objects between the throttle valve and housing. OK No foreign objects between throttle valve and housing. NG --> REMOVE FOREIGN OBJECT AND CLEAN THROTTLE BODY OK: Go to next step
  4. INSPECT THROTTLE VALVE Check if the throttle valve opens and closes smoothly. OK Throttle valve opens and closes smoothly. NG --> See step 6 OK --> See step 7
  5. REPLACE THROTTLE BODY ASSEMBLY. Refer to «REMOVAL»(ref-493466-S05114120172012081000000)
  6. REPLACE THROTTLE BODY ASSEMBLY. Refer to «REMOVAL»(ref-493466-S05114120172012081000000)
  7. REPLACE ECM. Refer to «REMOVAL»(ref-493466-S41904497902012081000000)

HINT

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.

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

HINT

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.

Scheme 636

Scheme 636: PROCEDURE
Scheme 636: PROCEDURE
  1. READ VALUE USING TECHSTREAM (+BM VOLTAGE) Connect the Techstream to the DLC3. Turn the ignition switch to ON. Turn the Techstream on. Enter the following menus: Powertrain / Engine and ECT / Data List / +BM Voltage. Read the value displayed on the Techstream. RESULT Result Proceed to Less than 11 V or more than 14 V A 11 to 14 V B B --> See step 3 A: Go to next step
  2. CHECK HARNESS AND CONNECTOR (ECM - BATTERY, BODY GROUND) Disconnect the B30 ECM connector. Measure the voltage according to the value(s) in the table below. Standard voltage Tester Connection Condition Specified Condition B30-41 (+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 B30-81 (E1) - Body ground Always Below 1 ohms B30-82 (ME01) - Body ground Always Below 1 ohms Reconnect the ECM connector. NG --> REPAIR OR REPLACE HARNESS OR CONNECTOR OK --> See step 4
  3. CHECK FOR INTERMITTENT PROBLEMS. Refer to «CHECK FOR INTERMITTENT PROBLEMS»(ref-493460-S14877818602012081000000)
  4. REPLACE ECM. Refer to «REMOVAL»(ref-493466-S41904497902012081000000)

HINT

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.

HINT

  1. These DTCs relate to the Accelerator Pedal Position (APP) sensor.
  2. 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.

Scheme 637

Scheme 637: PROCEDURE
Scheme 637: PROCEDURE

Scheme 638

Scheme 638
Scheme 638

Scheme 639

Scheme 639
Scheme 639
  1. READ VALUE USING TECHSTREAM (ACCEL SENSOR OUT No. 1 AND ACCEL SENSOR OUT No. 2) Connect the Techstream to the DLC3. Turn the ignition switch to ON and turn the Techstream ON. Select the following menu items: Powertrain / Engine and ECT / Data List / Accel Sensor Out No. 1 and Accel Sensor Out No. 2. Read the value displayed on the Techstream. Standard voltage Accelerator Pedal Operation Accel Sensor Out No. 1 Accel Sensor Out No. 2 Released --> Depressed --> Released 0.5 to 4.5 V 1.2 to 4.98 V Difference between Accel Sensor Out No. 1 and Accel Sensor Out No. 2 is greater than 0.02 V Difference between Accel Sensor Out No. 1 and Accel Sensor Out No. 2 is greater than 0.02 V OK --> See step 5 NG: Go to next step
  2. CHECK WIRE HARNESS (ACCELERATOR PEDAL POSITION SENSOR - ECM) Disconnect the A4 Accelerator Pedal Position (APP) sensor connector. Disconnect the A9 ECM connector. Measure the resistance. Standard resistance Tester Connection Specified Condition A4-6 (VPA) - A9-55 (VPA) Below 1 ohms A4-5 (EPA) - A9-58 (EPA) Below 1 ohms A4-4 (VCPA) - A9-57 (VCPA) Below 1 ohms A4-3 (VPA2) - A9-56 (VPA2) Below 1 ohms A4-2 (EPA2) - A9-60 (EPA2) Below 1 ohms A4-1 (VCP2) - A9-59 (VCP2) Below 1 ohms A4-6 (VPA) or A9-55 (VPA) - Body ground 10 kohms or higher A4-5 (EPA) or A9-58 (EPA) - Body ground 10 kohms or higher A4-4 (VCPA) or A9-57 (VCPA) - Body ground 10 kohms or higher A4-3 (VPA2) or A9-56 (VPA2) - Body ground 10 kohms or higher A4-2 (EPA2) or A9-60 (EPA2) - Body ground 10 kohms or higher A4-1 (VCP2) or A9-59 (VCP2) - Body ground 10 kohms or higher Reconnect the APP sensor connector. Reconnect the ECM connector. NG --> REPAIR OR REPLACE HARNESS OR CONNECTOR OK: Go to next step
  3. CHECK ECM (VCPA AND VCP2 VOLTAGE) Disconnect the A4 APP sensor connector. Turn the ignition switch to ON. Measure the voltage between the terminals of the A4 APP sensor connector. Standard voltage Tester Connection Specified Condition A4-4 (VCPA) - A4-5 (EPA) 4.5 to 5.5 V A4-1 (VCP2) - A4-2 (EPA2) 4.5 to 5.5 V Reconnect the APP sensor connector. NG --> See step 6 OK: Go to next step
  4. REPLACE ACCELERATOR PEDAL ASSEMBLY Replace the accelerator pedal assembly.Refer to «REMOVAL»(ref-493466-S03195754632012081000000) . NEXT: Go to next step
  5. CHECK WHETHER DTC OUTPUT RECURS (ACCELERATOR PEDAL POSITION SENSOR DTCS) Connect the Techstream to the DLC3. Turn the ignition switch to ON and turn the Techstream ON. Clear DTCs.Refer to «DTC CHECK / CLEAR»(ref-493460-S06003279822012081000000) . Start the engine. Allow the engine to idle for 15 seconds. Select the following menu items: Powertrain / Engine and ECT / Trouble Code. Read DTCs. Result Display (DTC Output) Proceed to P2120, P2122, P2123, P2125, P2127, P2128, and/or P2138 A No output B B --> SYSTEM OK A --> See step 7
  6. REPLACE ECM. Refer to «REMOVAL»(ref-493466-S41904497902012081000000)
  7. REPLACE ECM. Refer to «REMOVAL»(ref-493466-S41904497902012081000000)

HINT

  1. This DTC relates to the Accelerator Pedal Position (APP) sensor.
  2. 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.

HINT

  1. Although the DTC titles say oxygen sensor, these DTCs relate to the Air-Fuel Ratio (A/F) sensor.
  2. Sensor 1 refers to the sensor mounted in front of the Three-Way Catalytic Converter (TWC) and located near the engine assembly.
  3. 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.
  4. A low A/F 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 A/F sensor voltage could be caused by a lean air-fuel mixture. Check for conditions that would cause the engine to run lean.

HINT

Techstream only

Malfunctioning areas can be identified by performing the Control the Injection Volume for A/F Sensor function provided in the Active Test. The Control the Injection Volume for A/F Sensor function can help to determine whether the Air-Fuel Ratio (A/F) sensor, Heated Oxygen (HO2) sensor and other potential trouble areas are malfunctioning.

The following instructions describe how to conduct the Control the Injection Volume for A/F Sensor operation using the Techstream.

  1. (a) Connect the Techstream to the DLC3.
  2. (b) Start the engine and turn the Techstream ON.
  3. (c) Warm up the engine at an engine speed of 2, 500 rpm for approximately 90 seconds.
  4. (d) On the Techstream, select the following menu items: Powertrain / Engine and ECT / Active Test / Control the Injection Volume for A/F Sensor.
  5. (e) Perform the Control the Injection Volume for A/F Sensor operation with the engine idling (press the RIGHT or LEFT button to change the fuel injection volume).
  6. (f) Monitor the output voltages of the A/F and HO2 sensors (AFS Voltage B1S1 and O2S B1S2, or AFS Voltage B2S1 and O2S B2S2) displayed on the Techstream.

HINT

  1. The Control the Injection Volume for A/F Sensor operation lowers the fuel injection volume by 12.5% or increases the injection volume by 25%.
  1. The sensors react in accordance with increases and decreases in the fuel injection volume.
  2. Bank 1 refers to the bank that includes the No. 1 cylinder*. *: The No. 1 cylinder is the cylinder which is farthest from the transmission.
  3. Bank 2 refers to the bank that does not include the No. 1 cylinder.
  4. Sensor 1 refers to the sensor closest to the engine assembly.
  5. Sensor 2 refers to the sensor farthest away from the engine assembly.

Standard

Tester Display (Sensor)Injection VolumeStatusVoltage
AFS Voltage B1S1 (A/F)+12.5%RichLess than 3.1
12.5%LeanMore than 3.4
O2S B1S2 (HO2)+12.5%RichMore than 0.55
12.5%LeanLess than 0.4
AFS Voltage B2S1 (A/F)+12.5%RichLess than 3.1
12.5%LeanMore than 3.4
O2S B2S2 (HO2)+12.5%RichMore than 0.55
12.5%LeanLess than 0.4

Note. The A/F sensor has an output delay of a few seconds and the HO2 sensor output has a maximum output delay of approximately 20 seconds.

Case A/F Sensor (Sensor 1) Output Voltage HO2 Sensor (Sensor 2) Output Voltage Main Suspected Trouble Area 1 - 2 A/F sensor A/F sensor heater A/F sensor circuit 3 HO2 sensor HO2 sensor heater HO2 sensor circuit 4 Injector Fuel pressure Gas leak from exhaust system (Air-fuel ratio extremely rich or lean)

Scheme 640

Scheme 640
Scheme 640

Scheme 641

Scheme 641
Scheme 641

Scheme 642

Scheme 642
Scheme 642
  1. Following the Control the Injection Volume for A/F Sensor procedure enables technicians to check and graph the voltage outputs of both the A/F and HO2 sensors.
  2. To display the graph, select the following menu items on the Techstream: Powertrain / Engine and ECT / Active Test / Control the Injection Volume for A/F Sensor / A/F Control System / AFS Voltage B1S1 or AFS Voltage B2S1 and O2S B1S2 or O2S B2S2. Then press the graph button on the Data List view.

HINT

  1. Although the DTC titles say oxygen sensor, these DTCs relate to the Air-Fuel Ratio (A/F) sensor.
  2. Sensor 1 refers to the sensor mounted in front of the Three-Way Catalytic Converter (TWC) and located near the engine assembly.

HINT

Techstream only

Malfunctioning areas can be identified by performing the Control the Injection Volume for A/F Sensor function provided in the Active Test. The Control the Injection Volume for A/F Sensor function can help to determine whether the Air-Fuel Ratio (A/F) sensor, Heated Oxygen (HO2) sensor and other potential trouble areas are malfunctioning.

The following instructions describe how to conduct the Control the Injection Volume for A/F Sensor operation using the Techstream.

  1. (a) Connect the Techstream to the DLC3.
  2. (b) Start the engine and turn the Techstream ON.
  3. (c) Warm up the engine at an engine speed of 2, 500 rpm for approximately 90 seconds.
  4. (d) On the Techstream, select the following menu items: Powertrain / Engine and ECT / Active Test / Control the Injection Volume for A/F Sensor.
  5. (e) Perform the Control the Injection Volume for A/F Sensor operation with the engine idling (press the RIGHT or LEFT button to change the fuel injection volume).
  6. (f) Monitor the output voltages of the A/F and HO2 sensors (AFS Voltage B1S1 and O2S B1S2, or AFS Voltage B2S1 and O2S B2S2) displayed on the Techstream.

HINT

  1. The Control the Injection Volume for A/F Sensor operation lowers the fuel injection volume by 12.5% or increases the injection volume by 12.5%.
  1. The sensors react in accordance with increases and decreases in the fuel injection volume.

Standard

Tester Display (Sensor)Injection VolumeStatusVoltage
AFS Voltage B1S1 (A/F)+12.5%RichLess than 3.1
12.5%LeanMore than 3.4
O2S B1S2 (HO2)+12.5%RichMore than 0.55
12.5%LeanLess than 0.4
AFS Voltage B2S1 (A/F)+12.5%RichLess than 3.1
12.5%LeanMore than 3.4
O2S B2S2 (HO2)+12.5%RichMore than 0.55
12.5%LeanLess than 0.4

Note. The A/F sensor has an output delay of a few seconds and the HO2 sensor has a maximum output delay of approximately 20 seconds.

Case A/F Sensor (Sensor 1) Output Voltage HO2 Sensor (Sensor 2) Output Voltage Main Suspected Trouble Area 1 - 2 A/F sensor A/F sensor heater A/F sensor circuit 3 HO2 sensor HO2 sensor heater HO2 sensor circuit 4 Injector Fuel pressure Gas leak from exhaust system (Air-fuel ratio extremely rich or lean)

  1. Following the Control the Injection Volume for A/F Sensor procedure enables technicians to check and graph the output voltages of both the A/F and HO2 sensors.
  2. To display the graph, select the following menu items on the Techstream: Powertrain / Engine and ECT / Active Test / Control the Injection Volume for A/F Sensor / A/F Control System / AFS Voltage B1S1 or AFS Voltage B2S1, and O2S B1S2 or O2S B2S2. Then press the graph button on the Data List view.

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. Bank 1 refers to the bank that includes the No. 1 cylinder*. *: The No. 1 cylinder is the cylinder which is farthest from the transmission.
  3. Bank 2 refers to the bank that does not include the No. 1 cylinder.
  4. Sensor 1 refers to the sensor closest to the engine assembly.
  5. Sensor 2 refers to the sensor farthest away from the engine assembly.
DTCMonitoring ItemMalfunction Detection ConditionTrouble AreaDetection TimingDetection Logic
P2420Vent valve stuck open (vent)Following condition met during key-off EVAP monitor: EVAP pressure change when vent valve ON (closed) less than 0.3 kPa-g (2.25 mmHg-g)Canister pump module (Reference orifice, leak detection pump, vent valve) Connector/wire harness (Canister pump module - ECM) ECMWhile ignition switch off2 trip

HINT

The vent valve is built into the canister pump module.

Refer to EVAP System.Refer to INSPECTION PROCEDURE .

DTCMonitoring ItemMalfunction Detection ConditionTrouble AreaDetection TimingDetection Logic
P2610Soak timer (built into ECM)ECM internal malfunctionECMEngine running2 trip

HINT

  1. DTC P2610 is set if an internal ECM problem is detected. Diagnostic procedures are not required. ECM replacement is necessary.
  2. 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.
  3. Bank 1 refers to the bank that includes the No. 1 cylinder*. *: The No. 1 cylinder is the cylinder which is farthest from the transmission.
  4. Bank 2 refers to the bank that does not include the No. 1 cylinder.
  5. Sensor 1 refers to the sensor closest to the engine assembly.
  6. Sensor 2 refers to the sensor farthest away from the engine assembly.

HINT

Techstream only

Malfunctioning areas can be identified by performing the Control the Injection Volume for A/F Sensor function provided in the Active Test. The Control the Injection Volume for A/F Sensor function can help to determine whether the Air-Fuel Ratio (A/F) sensor, Heated Oxygen (HO2) sensor and other potential trouble areas are malfunctioning.

The following instructions describe how to conduct the Control the Injection Volume for A/F Sensor operation using the Techstream.

  1. (a) Connect the Techstream to the DLC3.
  2. (b) Start the engine and turn the Techstream ON.
  3. (c) Warm up the engine at an engine speed of 2, 500 rpm for approximately 90 seconds.
  4. (d) On the Techstream, select the following menu items: Powertrain / Engine and ECT / Active Test / Control the Injection Volume for A/F Sensor.
  5. (e) Perform the Control the Injection Volume for A/F Sensor operation with the engine idling (press the RIGHT or LEFT button to change the fuel injection volume).
  6. (f) Monitor the voltage outputs of the A/F and HO2 sensors (AFS Voltage B1S1 and O2S B1S2, or AFS Voltage B2S1 and O2S B2S2) displayed on the Techstream. HINT: The Control the Injection Volume for A/F Sensor operation lowers the fuel injection volume by -12.5% or increases the injection volume by +12.5%. The sensors react in accordance with increases and decreases in the fuel injection volume. Standard Tester Display (Sensor) Injection Volume Status Voltage AFS Voltage B1S1 (A/F) +12.5% Rich Less than 3.1 -12.5% Lean More than 3.4 O2S B1S2 (HO2) +12.5% Rich More than 0.55 -12.5% Lean Less than 0.4 AFS Voltage B2S1 (A/F) +12.5% Rich Less than 3.1 -12.5% Lean More than 3.4 O2S B2S2 (HO2) +12.5% Rich More than 0.55 -12.5% Lean Less than 0.4

Note. The A/F sensor has an output delay of a few seconds and the HO2 sensor has a maximum output delay of approximately 20 seconds.

Case A/F Sensor (Sensor 1) Output Voltage HO2 Sensor (Sensor 2) Output Voltage Main Suspected Trouble Area 1 - 2 A/F sensor A/F sensor heater A/F sensor circuit 3 HO2 sensor HO2 sensor heater HO2 sensor circuit 4 Injector Fuel pressure Gas leak from exhaust system (Air-fuel ratio extremely rich or lean)

  1. Following the Control the Injection Volume for A/F Sensor procedure enables technicians to check and graph the voltage outputs of both the A/F and HO2 sensors.
  2. To display the graph, select the following menu items on the Techstream: Powertrain / Engine and ECT / Active Test / Control the Injection Volume for A/F Sensor / A/F Control System / AFS Voltage B1S1 or AFS Voltage B2S1 and O2S B1S2 or O2S B2S2. Then press the graph button on the Data List view.

HINT

  1. Sensor 1 refers to the sensor mounted in front of the Three-Way Catalytic Converter (TWC) and located near the engine assembly.
  2. Bank 1 refers to the bank that includes the No. 1 cylinder*. *: The No. 1 cylinder is the cylinder which is farthest from the transmission.
  3. Bank 2 refers to the bank that does not include the No. 1 cylinder.
  4. Sensor 1 refers to the sensor closest to the engine assembly.
  5. Sensor 2 refers to the sensor farthest away from the engine assembly.
  6. DTC P2A00 or P2A03 may be set when the air-fuel ratio is stuck outputting a value indicating a rich or lean air-fuel ratio.
  7. A low A/F sensor voltage could be caused by a rich air-fuel mixture. Check for conditions that would cause the engine to run rich.
  8. A high A/F sensor voltage could be caused by a lean air-fuel mixture. Check for conditions that would cause the engine to run lean.
  9. 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.

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.

Scheme 643

Scheme 643
Scheme 643

Scheme 644

Scheme 644
Scheme 644

Scheme 645

Scheme 645
Scheme 645

Scheme 646

Scheme 646
Scheme 646

Scheme 647

Scheme 647
Scheme 647

Scheme 648

Scheme 648
Scheme 648

Scheme 649

Scheme 649
Scheme 649

Scheme 650

Scheme 650
Scheme 650

Scheme 651

Scheme 651
Scheme 651

Scheme 652

Scheme 652
Scheme 652

Scheme 653

Scheme 653
Scheme 653

Scheme 654

Scheme 654
Scheme 654

Scheme 655

Scheme 655
Scheme 655

Scheme 656

Scheme 656
Scheme 656

Scheme 657

Scheme 657
Scheme 657

Scheme 658

Scheme 658
Scheme 658

Scheme 659

Scheme 659
Scheme 659

Scheme 660

Scheme 660
Scheme 660
  1. CONFIRM DTC Turn the ignition switch off and wait for 10 seconds. Turn the ignition switch to ON. Turn the ignition switch off and wait for 10 seconds. Connect the Techstream to the DLC3. Turn the ignition switch to ON 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 greater than the specification, all the DTCs relating to the reference pressure (P043E, P043F, P2401, P2402 and P2419) are stored. NEXT: Go to next step
  2. PERFORM EVAP 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 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 more, 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 ignition switch to ON. Turn the Techstream on. Clear the DTCs.Refer to «DTC CHECK / CLEAR»(ref-493460-S06003279822012081000000) . Enter the following menus: Powertrain / Engine and ECT / Utility / Evaporative System Check / Automatic Mode. After the EVAP 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 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 EVAP 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 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 more, 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 ignition switch to ON. Turn the Techstream on. Clear the DTCs.Refer to «DTC CHECK / CLEAR»(ref-493460-S06003279822012081000000) . Enter the following menus: Powertrain / Engine and ECT / Utility / Evaporative System Check / Manual Mode. NEXT: Go to next step
  4. PERFORM EVAP 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-g [2.25 mmHg-g] or more Canister pressure sensor signal noise B (P0452 or P0453) *2 EVAP pressure is below 42.11 kPa-a [315.85 mmHg-a] or 123.761 kPa-a [928.28 mmHg-a] or more 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 ignition switch is turned to ON. HINT: *3: Canister pressure sensor standard output range is 70 to 110 kPa-a [525 to 825 mmHg-a]. This varies by weather. B --> See step 38 C --> See step 12 A: Go to next step
  5. PERFORM EVAP 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 EVAP 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-g and -1.057 kPa-g [-36.377 mmHg-g and -7.928 mmHg-g] Not yet determined A P043F and P2401 EVAP pressure in inspection item (B) is -1.057 kPa-g [-7.928 mmHg-g] or more Reference orifice high-flow Leak detection pump stuck OFF B P043E EVAP pressure in inspection item (B) is less than -4.85 kPa-g [-36.377 mmHg-g] Reference orifice clogged C P2419 EVAP pressure in inspection item (A) is more than -0.25 kPa-g [-1.875 mmHg-g] 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 EVAP 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-g [2.25 mmHg-g] or more 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 EVAP SYSTEM CHECK (STEP 3/6) Wait until the EVAP pressure change is less than 0.12 kPa-g [0.9 mmHg-g] 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 EVAP 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-g [2.25 mmHg-g] or more 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-g [2.25 mmHg-g] or more within 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-g [2.25 mmHg-g] 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 EVAP 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 EVAP 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 «DTC P0451: Evaporative Emission Control System Pressure Sensor Range / Performance; DTC P0452: Evaporative Emission Control System Pressure Sensor / Switch Low Input; DTC P0453: Evaporative Emission Control System Pressure Sensor / Switch High Input»(ref-493463-S23991667752012081000000) . NEXT --> See step 48
  13. INSPECT CANISTER PUMP MODULE (VENT VALVE OPERATION) Turn the ignition switch off. Disconnect the canister pump module connector. Apply the 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 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 ignition switch off. 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 A9-30 (VPMP) - S3-8 (VGND) Always Below 1 ohms A9-30 (VPMP) or S3-8 (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 S3-6 (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 A9-49 (MPMP) - S3-1 (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. 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»(ref-493427-S39742233842012081000000) . OK No blockages in the canister. OK --> See step 47 NG --> See step 38
  20. CHECK FUEL CAP ASSEMBLY 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-g [24 to 28 mmHg-g] 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 more, 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 ignition switch off. Disconnect the purge VSV connector. 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 (short to ground) 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. 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 battery voltage to the terminals of the purge VSV. Confirm that air flows from port A to port B. RESULT Test Result Condition Suspected Trouble Area Proceed to Air flows 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 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 ignition switch to ON. Measure the voltage according to the value(s) in the table below. RESULT Tester Connection Switch Condition Specified Condition Suspected Trouble Area Proceed to B34-1 - Body ground Ignition switch ON 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 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 B34-2 - B30-63 (PRG) Always Below 1 ohms B34-2 or B30-63 (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 ignition switch off. Disconnect the canister pump module connector. Turn the ignition switch to ON. Measure the voltage according to the value(s) in the table below. RESULT Tester Connection Switch Condition Specified Condition Suspected Trouble Area Proceed to S3-9 (VLVB) - Body ground Ignition switch ON 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 ignition switch off. Disconnect the canister pump module connector. Apply the 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 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 ignition switch off. 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 A9-30 (VPMP) - S3-8 (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»(ref-493427-S39742233842012081000000) . OK No blockages in the canister. OK --> See step 47 NG --> See step 38
  31. PERFORM ACTIVE TEST USING TECHSTREAM (ACTIVATE THE VACUUM PUMP) Turn the ignition switch off. Disconnect the canister pump module connector. Turn the ignition switch to ON. 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 S3-1 (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 ignition 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 S3-6 (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 ignition 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 A9-49 (MPMP) - S3-1 (MTRB) Always Below 1 ohms A9-49 (MPMP) or S3-1 (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 UPPER INTAKE MANIFOLD SUB-ASSEMBLY (EVAP PURGE PORT) Stop the engine. Disconnect the EVAP hose from the intake manifold (upper intake manifold sub-assembly). 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 (upper intake manifold sub-assembly) 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 48
  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 48
  37. LOCATE EVAP LEAK PART Disconnect the vent hose. Connect the EVAP pressure tester tool to the canister pump module with the adapter. Pressurize the EVAP system to 3.2 to 3.7 kPa-g [24 to 28 mmHg-g]. 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 48
  38. REPLACE CANISTER Replace the canister.Refer to «REMOVAL»(ref-493427-S22464123852012081000000) . 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. NEXT --> See step 48
  39. REPLACE PURGE VSV Replace the purge VSV. Refer to «REMOVAL»(ref-493427-S05341499062012081000000) . NEXT --> See step 48
  40. REPAIR OR REPLACE HARNESS OR CONNECTOR NEXT --> See step 48
  41. REPAIR OR REPLACE EVAP PURGE LINE (INTAKE MANIFOLD - PURGE VSV) NEXT --> See step 48
  42. INSPECT INTAKE AIR SURGE TANK ASSEMBLY (EVAP PURGE PORT) Check that the EVAP purge port of the intake air surge tank assembly is not clogged. If necessary, replace the intake air surge tank assembly.Refer to «REMOVAL - Step 56»(ref-493421-S02277901022012081000000) . NEXT --> See step 48
  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 48
  44. REPAIR OR REPLACE EVAP PURGE LINE (PURGE VSV - CANISTER) NEXT --> See step 48
  45. REPLACE CANISTER Replace the canister.Refer to «REMOVAL»(ref-493427-S22464123852012081000000) . 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. NEXT: Go to next step
  46. PERFORM EVAP 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 more 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 more, 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 ignition switch to ON. Turn the Techstream on. Clear the DTCs.Refer to «DTC CHECK / CLEAR»(ref-493460-S06003279822012081000000) . 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»(ref-493466-S41904497902012081000000) . NEXT: Go to next step
  48. PERFORM EVAP 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 more 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 more, 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 ignition switch to ON. Turn the Techstream on. Clear the DTCs.Refer to «DTC CHECK / CLEAR»(ref-493460-S06003279822012081000000) . 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

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

Scheme 661

Scheme 661: PROCEDURE
Scheme 661: PROCEDURE

Scheme 662

Scheme 662
Scheme 662

Scheme 663

Scheme 663
Scheme 663
  1. CHECK START SYSTEM Confirm the engine starting system. RESULT Result Proceed to Engine switch A Ignition switch B B --> See step 6 A: Go to next step
  2. CHECK CRANKING Check the cranking of the engine. RESULT Result Proceed to Cranking possible but holding control does not operate A Does not crank B Cranking possible and holding control operates C B --> See step 7 C --> See step 8 A: Go to next step
  3. INSPECT ECM (STSW TERMINAL VOLTAGE) Disconnect the A9 ECM connector. Move the shift lever to P. Measure the voltage according to the value(s) in the table below. Standard voltage Tester Connection Condition Specified Condition A9-14 (STSW) - Body ground Engine cranking 11 to 14 V Reconnect the ECM connector. NG --> See step 5 OK: Go to next step
  4. CHECK HARNESS AND CONNECTOR (ECM - PARK/NEUTRAL POSITION SWITCH ASSEMBLY - MAIN BODY ECU) Remove the ST CUT relay from the No. 7 relay block. Disconnect the B30 ECM connector. Measure the resistance according to the value(s) in the table below. Standard resistance (Check for open) Tester Connection Specified Condition 3 (ST CUT relay) - B30-16 (STAR) Below 1 ohms Standard resistance (Check for short) Tester Connection Specified Condition 3 (ST CUT relay) or B30-16 (STAR) - Body ground 10 kohms or higher Reconnect the ECM connector. Reinstall the ST CUT relay. NG --> REPAIR OR REPLACE HARNESS OR CONNECTOR OK --> See step 9
  5. CHECK HARNESS AND CONNECTOR (ECM - MAIN BODY ECU) Disconnect the E17 main body ECU connector. Disconnect the A9 ECM connector. Measure the resistance according to the value(s) in the table below. Standard resistance (Check for open) Tester Connection Specified Condition E17-4 (STSW) - A9-14 (STSW) Below 1 ohms Standard resistance (Check for short) Tester Connection Specified Condition E17-4 (STSW) or A9-14 (STSW) - Body ground 10 kohms or higher Reconnect the main body ECU connector. Reconnect the ECM connector. NG --> REPAIR OR REPLACE HARNESS OR CONNECTOR OK --> See step 10
  6. PROCEED TO NEXT SUSPECTED AREA SHOWN IN PROBLEM SYMPTOMS TABLE. Refer to «PROBLEM SYMPTOMS TABLE»(ref-493460-S25464997372012081000000)
  7. CHECK SMART KEY SYSTEM. Refer to «Engine does not Start»(ref-493474-S11306927282012081000000)
  8. PROCEED TO NEXT SUSPECTED AREA SHOWN IN PROBLEM SYMPTOMS TABLE. Refer to «PROBLEM SYMPTOMS TABLE»(ref-493460-S25464997372012081000000)
  9. REPLACE ECM. Refer to «REMOVAL»(ref-493466-S41904497902012081000000)
  10. CHECK SMART KEY SYSTEM. Refer to «Engine does not Start»(ref-493474-S11306927282012081000000)

Inspection Method

Drive at 10 km/h (6.25 mph), depress the accelerator pedal by 1/2 to 3/4 and keep it in that position. Under these conditions, if the engine speed decreases to 1000 rpm when the brake pedal is depressed, then the brake override system has been activated.

WARNINGWhen carrying out the inspection, use a place where you are able to carry it out safely and also pay close attention to your surroundings. Also, when driving make absolutely sure that all road traffic laws, such as speed limits, are observed.

HINT

  1. Under normal conditions, the Accelerator Position value changes in response to the Accel Sens. No. 1 Volt % value. For more information on the numerical values, refer to the Data List.Refer to «DATA LIST / ACTIVE TEST»(ref-493460-S25626451972012081000000) .
  2. If the Data List values of Accelerator Position and Accel Sens. No. 1 Volt % do not match, and the value of Accelerator Position changes but the value of Accel Sens. No. 1 Volt % is constant, this confirms that brake override system has activated. (Data can be captured relatively easily by using the snapshot function in the Data List. Confirm the data after performing the drive test.)

Note. The brake override system restricts driving torque if the brake pedal is depressed when driving with the accelerator pedal depressed. If a customer reports experiencing loss of torque after the accelerator and brake pedals have both been intentionally depressed, explain to the customer that this is not a malfunction, and that the customer should avoid depressing both the accelerator and brake pedals at the same time. Example: While operating the accelerator pedal, the customer uses their left foot to operate the brake pedal.

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