Engine Control System (Diagnostic Codes (P0401-P1605)): Diagnosis Lexus GX J150

INSPECTION PROCEDURE

HINT

1. By using the Control the EGR Step Position Active Test, the operation of the EGR valve can be checked.
2. When the engine is idling steadily with the EGR valve fully closed, if the EGR valve is normal and it is opened using the Active Test, the Data List values will change as follows. Data List Change in Data List when Number of Steps is Increased Using Control the EGR Step Position Active Test Engine Speed Idle becomes rough MAP Pressure rises
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.

Scheme 158

Scheme 159

1. CHECK FOR ANY OTHER DTCS OUTPUT (IN ADDITION TO P0401) Connect the Techstream to the DLC3. Turn the engine 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 P0401 is output A DTC P0401 and other DTCs are output B HINT: If any DTCs other than P0401 are output, perform troubleshooting for those DTCs first. B --> See step 13 A: Go to next step
2. PERFORM ACTIVE TEST USING TECHSTREAM (OPERATE EGR VALVE) Connect the Techstream to the DLC3. Start the engine and warm it up until the engine coolant temperature reaches 75°C (167°F) or higher. HINT: When performing the Active Test, make sure the shift lever is in P or N. The A/C switch and all accessory switches should be off. Turn the Techstream on. Enter the following menus: Powertrain / Engine and ECT / Active Test / Control the EGR Step Position. Confirm that Throttle Idle Position is ON and check the engine idling condition and the value of MAP 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. OK MAP and idling condition change in response to EGR step position as follows. Standard - EGR Step Position (Active Test) Step 0 Step 0 to 30 Idling condition Steady idling Idling changes from steady to rough idling or engine stalls MAP (Data List) - MAP value is at least 10 kPa (75 mmHg) higher than when EGR valve is fully closed NG --> See step 4 OK: Go to next step
3. INSPECT EGR VALVE ASSEMBLY Confirm that there are no deposits on the EGR valve. Confirm that the EGR valve is closed. OK There are no deposits and the valve is closed. OK --> See step 5 NG --> See step 4
4. REPLACE EGR VALVE ASSEMBLY Replace the EGR valve assembly. Refer to «REMOVAL»(ref-524251-S06751532262013012800000) . NEXT: Go to next step
5. CHECK FOR DEPOSIT (EGR VALVE ASSEMBLY TO INTAKE PORT) Check for exhaust leaks at each connection point. Check for cracks, damage and blockage of the pipes between the intake manifold converter and EGR valve assembly. HINT: This check may require the removal of components. Check for blockage due to deposits in the EGR valve and pipes. OK No deposits. NG --> REPAIR OR REPLACE MALFUNCTIONING PARTS OK: Go to next step
6. CHECK FOR DEPOSIT (EXHAUST MANIFOLD CONVERTER TO EGR VALVE ASSEMBLY) Check for exhaust leaks at each connection point. Check for cracks, damage and blockage of the pipes between the exhaust manifold converter and EGR valve assembly. HINT: This check may require the removal of components. Check for blockage due to deposits in the EGR valve and pipes. OK No deposits. NG --> REPAIR OR REPLACE MALFUNCTIONING PARTS OK: Go to next step
7. INSPECT EGR COOLER ASSEMBLY Check for blockage in the EGR cooler assembly. NG --> See step 14 OK: Go to next step
8. READ VALUE USING TECHSTREAM (MANIFOLD ABSOLUTE PRESSURE SENSOR) Connect the Techstream to the DLC3. Turn the engine switch on (IG). Turn the Techstream on. Enter the following menus: Powertrain / Engine and ECT / Data List / MAP. Read the MAP value. Standard Switch Condition Techstream Display Engine switch on (IG) 80 to 110 kPa (600 to 825 mmHg) OK --> See step 11 NG --> See step 9
9. CHECK INTAKE SYSTEM Check the intake system for vacuum leaks. Refer to «ON-VEHICLE INSPECTION - Step 3»(ref-524270-S25831447522013012800000) . OK No leaks in intake system. NG --> See step 12 OK: Go to next step
10. REPLACE MANIFOLD ABSOLUTE PRESSURE SENSOR Replace the manifold absolute pressure sensor. Refer to «REMOVAL»(ref-524262-S01653891792013012800000) . NEXT: Go to next step
11. CONFIRM WHETHER MALFUNCTION HAS BEEN SUCCESSFULLY REPAIRED Connect the Techstream to the DLC3. Turn the engine switch on (IG). Turn the Techstream on. Clear the DTCs. Refer to «DTC CHECK / CLEAR»(ref-524126-S41645429092013012800000) . Turn the engine switch off and wait for 30 seconds. Turn the engine switch on (IG) and turn the Techstream on. 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. Drive the vehicle at 60 km/h (37 mph) for 5 minutes or more. Idle the engine for 30 seconds or more. Drive the vehicle at 60 km/h (37 mph). WARNING: Strictly observe speed limits and traffic laws when performing the confirmation drive pattern. Perform fuel cut operation for 5 seconds or more with the accelerator pedal fully released. HINT: If the deceleration was not completed, perform the Confirmation Driving Pattern again. Enter the following menus: Powertrain / Engine and ECT / Trouble Codes / Pending. Read the pending DTCs. If a pending DTC is output, the system is malfunctioning. HINT: If a pending DTC is not output, perform the following procedure. Enter the following menus: Powertrain / Engine and ECT / Utility / All Readiness. Input the DTC: P0401. 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 UNKNOWN Unable to perform DTC judgment Number of DTCs which do not fulfill DTC preconditions has reached ECU memory limit NEXT --> END
12. REPAIR OR REPLACE INTAKE SYSTEM. Refer to «REMOVAL»(ref-524246-S40846759042013012800000)
13. GO TO DTC CHART. Refer to «DIAGNOSTIC TROUBLE CODE CHART»(ref-524126-S26606347652013012800000)
14. REPAIR OR REPLACE EGR COOLER ASSEMBLY. Refer to «REMOVAL»(ref-524251-S40450976452013012800000)

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 160

1. PERFORM ACTIVE TEST USING TECHSTREAM (OPERATE EGR VALVE) Connect the Techstream to the DLC3. Start the engine and warm it up until the engine coolant temperature reaches 75°C (167°F) or higher. HINT: When performing the Active Test, make sure the shift lever is in P or N. The A/C switch and all accessory switches should be off. Turn the Techstream on. Enter the following menus: Powertrain / Engine and ECT / Active Test / Control the EGR Step Position. Confirm that Throttle Idle Position is ON and check the engine idling condition and the value of MAP 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. OK MAP and idling condition change in response to EGR step position as follows. Standard - EGR Step Position (Active Test) Step 0 Step 0 to 30 Idling condition Steady idling Idling changes from steady to rough idling or engine stalls MAP (Data List) 20 to 40 kPa (150 to 300 mmHg) MAP value is at least 10 kPa (75 mmHg) higher than when EGR valve is fully closed NG --> See step 2 OK --> See step 7
2. INSPECT EGR VALVE ASSEMBLY Inspect the EGR valve assembly. Refer to «INSPECTION - Step 1»(ref-524251-S29723243952013012800000) . NG --> See step 8 OK: Go to next step
3. INSPECT EGR VALVE ASSEMBLY (+B OR +B2 VOLTAGE) Disconnect the EGR valve connector. Measure the voltage according to the value(s) in the table below. Standard Voltage Tester Connection Switch Condition Specified Condition C43-5 (+B1) - Body ground Engine switch on (IG) 11 to 14 V C43-2 (+B2) - Body ground Engine switch on (IG) 11 to 14 V TEXT IN ILLUSTRATION *a Front view of wire harness connector (to EGR Valve Assembly) Reconnect the EGR valve connector. NG --> See step 6 OK: Go to next step
4. CHECK HARNESS AND CONNECTOR (ECM - EGR VALVE) Disconnect the EGR valve connector. Disconnect the ECM connector. Measure the resistance according to the value(s) in the table below. Standard Resistance (Check for Open) Tester Connection Condition Specified Condition C28-23 (EGR1) - C43-4 (EGR1) Always Below 1 ohms C28-36 (EGR2) - C43-3 (EGR2) Always Below 1 ohms C28-30 (EGR3) - C43-6 (EGR3) Always Below 1 ohms C28-24 (EGR4) - C43-1 (EGR4) Always Below 1 ohms Standard Resistance (Check for Short) Tester Connection Condition Specified Condition C28-23 (EGR1) or C43-4 (EGR1) - Body ground Always 10 kohms or higher C28-36 (EGR2) or C43-3 (EGR2) - Body ground Always 10 kohms or higher C28-30 (EGR3) or C43-6 (EGR3) - Body ground Always 10 kohms or higher C28-24 (EGR4) or C43-1 (EGR4) - Body ground Always 10 kohms or higher Reconnect the EGR valve connector. Reconnect the ECM connector. NG --> REPAIR OR REPLACE HARNESS OR CONNECTOR OK: Go to next step
5. CHECK WHETHER DTC OUTPUT RECURS (DTC P0403) Connect the Techstream to the DLC3. Turn the engine switch on (IG) and turn the Techstream on. Clear DTCs. Refer to «DTC CHECK / CLEAR»(ref-524126-S41645429092013012800000) . Drive the vehicle in accordance with the driving pattern described in Confirmation Driving Pattern. Confirm that no DTC is output using the Techstream. RESULT Result Proceed to DTC P0403 output A No DTC output B B --> END A --> See step 10
6. CHECK HARNESS AND CONNECTOR (NO. 1 INTEGRATION RELAY - EGR VALVE) Disconnect the EGR valve connector. Remove the No. 1 integration relay from engine room relay block. Measure the resistance according to the value(s) in the table below. Standard Resistance (Check for Open) Tester Connection Condition Specified Condition 1B-4 - C43-5 (+B1) Always Below 1 ohms 1B-4 - C43-2 (+B2) Always Below 1 ohms Standard Resistance (Check for Short) Tester Connection Condition Specified Condition 1B-4 or C43-5 (+B1) - Body ground Always 10 kohms or higher 1B-4 or C43-2 (+B2) - Body ground Always 10 kohms or higher Reconnect the EGR valve connector. Reinstall the No. 1 integration relay. NG --> REPAIR OR REPLACE HARNESS OR CONNECTOR OK --> See step 9
7. CHECK FOR INTERMITTENT PROBLEMS. Refer to «CHECK FOR INTERMITTENT PROBLEMS»(ref-524126-S03735106152013012800000)
8. REPLACE EGR VALVE ASSEMBLY. Refer to «REMOVAL»(ref-524251-S06751532262013012800000)
9. CHECK ECM POWER SOURCE CIRCUIT. Refer to «ECM Power Source Circuit»(ref-524264-S01180072842013012800000)
10. REPLACE ECM. Refer to «REMOVAL»(ref-524262-S01887464392013012800000)

HINT

1. By using the Techstream to perform the Air Injection Check operation in the System Check, the air-fuel ratio and the pressure in the secondary air injection system passage can be checked while the secondary air injection system is operating. This helps technicians to troubleshoot the system when it malfunctions.
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.

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 161

1. INSPECT AIR INJECTION VSV RELAY (AI-VSV) Inspect the air injection VSV relay (AI-VSV). Refer to «ON-VEHICLE INSPECTION - Step 5»(ref-524262-S35068267992013012800000) . NG --> REPLACE AIR INJECTION VSV RELAY (AI-VSV) OK: Go to next step
2. CHECK AIR INJECTION VSV RELAY (AI-VSV) (POWER SOURCE) Remove the air injection VSV relay (AI-VSV). Measure the voltage according to the value(s) in the table below. Standard Voltage Tester Connection Switch Condition Specified Condition Air injection VSV relay (AI-VSV) terminal 2 - Body ground Engine switch on (IG) 11 to 14 V Air injection VSV relay (AI-VSV) terminal 5 - Body ground Engine switch on (IG) 11 to 14 V TEXT IN ILLUSTRATION *1 Engine Room Relay Block *2 Air Injection VSV Relay (AI-VSV) Reinstall the air injection VSV relay (AI-VSV). NG --> REPAIR OR REPLACE HARNESS OR CONNECTOR OK: Go to next step
3. CHECK HARNESS AND CONNECTOR (ECM - AIR INJECTION VSV RELAY (AI-VSV)) Remove the air injection VSV relay (AI-VSV). Disconnect the ECM connector. Measure the resistance according to the value(s) in the table below. Standard Resistance (Check for Open) Tester Connection Condition Specified Condition Air injection VSV relay (AI-VSV) terminal 1 - C30-20 (AIR1) Always Below 1 ohms Standard Resistance (Check for Short) Tester Connection Condition Specified Condition Air injection VSV relay (AI-VSV) terminal 1 or C30-20 (AIR1) - Body ground Always 10 kohms or higher Reinstall the air injection VSV relay (AI-VSV). Reconnect the ECM connector. NG --> REPAIR OR REPLACE HARNESS OR CONNECTOR OK --> See step 4
4. REPLACE ECM. Refer to «REMOVAL»(ref-524262-S01887464392013012800000)

HINT

1. By using the Techstream to perform the Air Injection Check operation in the System Check, the air-fuel ratio and the pressure in the secondary air injection system passage can be checked while the secondary air injection system is operating. This helps technicians to troubleshoot the system when it malfunctions.
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.

CONDITIONING FOR SENSOR TESTING

HINT

Perform the operation with the engine speeds and time durations described below prior to checking the waveforms of the air fuel ratio and heated oxygen sensors. This is to activate the sensors sufficiently to obtain appropriate inspection results.

Scheme 162

1. (a) Connect the Techstream to the DLC3.
2. (b) Start the engine and warm it up with all the accessories switched off until the engine coolant temperature stabilizes.
3. (c) Run the engine at an engine speed of between 2500 rpm and 3000 rpm for at least 3 minutes.
4. (d) While running the engine at 3000 rpm for 2 seconds, and then 2000 rpm for 2 seconds, check the waveforms of the air fuel ratio and heated oxygen sensors using the Techstream.

HINT

1. If the voltage output of either the air fuel ratio or heated oxygen sensor does not fluctuate, or there is a noise in the waveform of either sensor, the sensor may be malfunctioning.
2. If the voltage outputs of both the sensors remain lean or rich, the air-fuel ratio may be extremely lean or rich. In such cases, perform the Control the Injection Volume for A/F Sensor Active Test using the Techstream.
3. If the Three-way Catalytic Converter (TWC) has deteriorated, the heated oxygen sensor (located behind the Three-way Catalytic Converter (TWC)) voltage output fluctuates up and down frequently, even under normal driving conditions (active air-fuel ratio control is not performed).

RESULT OF REAL-VEHICLE CHECK

Scheme 163

HINT

1. After performing repairs, drive the vehicle in accordance with the driving pattern described in Confirmation Driving Pattern and check if DTC P0420 or P0430 is output again. If a DTC is output again, replace the catalyst if it has not been replaced already.
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.

DTC SUMMARY

HINT

The reference orifice is located inside the canister pump module.

Refer to EVAP System. Refer to 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.

HINT

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

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 164

Scheme 165

1. CONFIRM DTC AND EVAP PRESSURE Connect the Techstream to the DLC3. Turn the engine switch on (IG) (do not start the engine). Turn the Techstream on. Enter the following menus: Powertrain / Engine and ECT / Trouble Codes. Read DTCs. Enter the following menus: Powertrain / Engine and ECT / Data List / All Data / Vapor Pressure Pump. Read the EVAP (Evaporative Emission) pressure displayed on the Techstream. RESULT Result Test Result Suspected Trouble Area Proceed to P0451 - Canister pressure sensor C P0452 Below 45 kPa-a (430 mmHg-a) Wire harness/connector (ECM - Canister pressure sensor) Canister pressure sensor Short in ECM circuit A P0453 Higher 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 4 C --> See step 9 A: Go to next step
2. CHECK HARNESS AND CONNECTOR (CANISTER PUMP MODULE - ECM) Turn the engine 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 C29-1 (PPMP) - Body ground Always 10 ohms or less Wire harness/connector (ECM - Canister pressure sensor) Short in canister pressure sensor circuit A C29-1 (PPMP) - Body ground Always 10 kohms or higher Wire harness/connector (ECM - Canister pressure sensor) Short in ECM circuit B B --> See step 7 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 C29-1 (PPMP) - Body ground Always 10 kohms or higher Short in canister pressure sensor circuit A C29-1 (PPMP) - Body ground Always 10 ohms or less Short in wire harness/connector (ECM - Canister pressure sensor) B A --> See step 5 B --> See step 6
4. 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 R27-8 (SGND) - Body ground Always 100 ohms or less Turn the engine switch on (IG). Measure the voltage according to the value(s) in the table below. Standard Voltage Tester Connection Switch Condition Specified Condition R27-6 (VCC) - Body ground Engine switch on (IG) 4.5 to 5.5 V R27-7 (VOUT) - Body ground Engine switch on (IG) 4.5 to 5.5 V TEXT IN ILLUSTRATION *a Front view of wire harness connector (to Canister Pump Module) RESULT 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 6 A: Go to next step
5. REPLACE CANISTER Replace the canister. Refer to «REMOVAL»(ref-524251-S05625440442013012800000) . NOTE: When replacing the canister assembly, 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. TEXT IN ILLUSTRATION *1 Fuel Tank Vent Hose *2 Vent Hose *3 Air Inlet Port *4 Fuel Tank *5 Canister - - *a Inspection Area (check for disconnection and/or cracks) - - NEXT --> See step 8
6. REPAIR OR REPLACE HARNESS OR CONNECTOR (CANISTER PUMP MODULE - ECM) HINT: If the exhaust tailpipe has been removed, go to the next step before reinstalling it. NEXT --> See step 8
7. REPLACE ECM Replace the ECM. Refer to «REMOVAL»(ref-524262-S01887464392013012800000) . NEXT: Go to next step
8. CHECK WHETHER DTC OUTPUT RECURS (AFTER REPAIR) Connect the Techstream to the DLC3. Turn the engine switch on (IG). Turn the Techstream on. Clear the DTCs. Refer to «DTC CHECK / CLEAR»(ref-524126-S41645429092013012800000) . Turn the engine switch off and wait for at least 30 seconds. Turn the engine switch on (IG) and turn the Techstream on. 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: 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 UNKNOWN Unable to perform DTC judgment Number of DTCs which do not fulfill DTC preconditions has reached ECU memory limit NEXT --> END
9. GO TO EVAP SYSTEM. Refer to «EVAP System»(ref-524264-S01445730802013012800000)

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.

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

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. Stop light switch conditions can be checked using the Techstream. Connect the Techstream to the DLC3. Turn the engine switch on (IG). Turn the Techstream on. Enter the following menus: Powertrain / Engine and ECT / Data List / All Data / Stop Light Switch and ST1. Check the Data List indication when the brake pedal is depressed and released.

Scheme 166

Scheme 167

1. READ VALUE USING TECHSTREAM (STOP LIGHT SWITCH) Connect the Techstream to the DLC3. Turn the engine switch on (IG). Turn the Techstream on. Enter the following menus: Powertrain / Engine and ECT / All Data / Stop Light Switch. Read the value displayed on the Techstream. Standard Condition Specified Condition Brake pedal depressed STP signal ON Brake pedal released STP signal OFF NG --> See step 2 OK --> See step 7
2. INSPECT STOP LIGHT SWITCH ASSEMBLY (B+ VOLTAGE) Disconnect the stop light switch connector. Measure the voltage according to the value(s) in the table below. Standard Voltage Tester Connection Condition Specified Condition A5-2 - Body ground Always 11 to 14 V A5-4 - Body ground Engine switch on (IG) 11 to 14 V TEXT IN ILLUSTRATION *a Front view of wire harness connector (to Stop Light Switch) NG --> REPAIR OR REPLACE HARNESS OR CONNECTOR (BATTERY - STOP LIGHT SWITCH) OK: Go to next step
3. INSPECT STOP LIGHT SWITCH ASSEMBLY Inspect the stop light switch assembly. Refer to «INSPECTION - Step 1»(ref-524276-S37129129582013012800000) . NG --> See step 5 OK: Go to next step
4. INSPECT ECM (STP AND ST1 - VOLTAGE) Disconnect the ECM connector. Turn the engine switch on (IG). Measure the voltage according to the value(s) in the table below. Standard Voltage Tester Connection Condition Specified Condition G44-8 (ST1-) - Body ground Brake pedal released 11 to 14 V Brake pedal depressed 0 to 3 V G45-18 (STP) - Body ground Brake pedal released 0 to 3 V Brake pedal depressed 11 to 14 V TEXT IN ILLUSTRATION *a Depressed *b Released *c Component with harness connected (ECM) NG --> REPAIR OR REPLACE HARNESS OR CONNECTOR OK --> See step 6
5. REPLACE STOP LIGHT SWITCH ASSEMBLY. Refer to «REMOVAL»(ref-524276-S30404324862013012800000)
6. REPLACE ECM. Refer to «REMOVAL»(ref-524262-S01887464392013012800000)
7. CHECK FOR INTERMITTENT PROBLEMS. Refer to «CHECK FOR INTERMITTENT PROBLEMS»(ref-524126-S03735106152013012800000)

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. 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. Refer to "Data List / Active Test" [Engine Speed, ISC Feedback Value and ISC Learning Value]. Refer to «DATA LIST / ACTIVE TEST»(ref-524126-S20424571482013012800000) .

HINT

1. DTC P050B may be stored when the engine has the symptoms listed below. If necessary, check the trouble areas listed below. Symptom Factor Trouble Area Low idle speed when engine is cold (immediately after engine start) Excessive engine friction Engine oil deterioration Drive belt tension A/C compressor Generator Vane pump Rough idle when engine is 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 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

1. If other DTCs related to different systems that have terminal E2 as the ground terminal are stored simultaneously, there may be an open circuit between terminal E2 and body ground.
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. Refer to "Data List / Active Test" [Power Steering Signal]. Refer to «DATA LIST / ACTIVE TEST»(ref-524126-S20424571482013012800000) .

Note. Inspect the fuses for 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.

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 Problem Symptoms Table. Refer to «PROBLEM SYMPTOMS TABLE»(ref-524126-S16095176252013012800000) .
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

Using the Techstream, the Data List item "Stop Light Switch" can be read.

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 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.
2. Refer to "Data List / Active Test" [Air Pump Pressure (Absolute), Air Pump2 Pressure (Absolute), Vapor Pressure Pump and MAP]. Refer to «DATA LIST / ACTIVE TEST»(ref-524126-S20424571482013012800000) .

HINT

Read freeze frame data using the Techstream. Freeze frame data records the engine conditions 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 168

Scheme 169

1. INSPECT CAMSHAFT POSITION SENSOR (SENSOR POWER SOURCE) Disconnect the camshaft position sensor connector. Turn the engine switch on (IG). Measure the voltage according to the value(s) in the table below. Standard Voltage Tester Connection Switch Condition Specified Condition C41-3 (VC) - Body ground Engine switch on (IG) 4.5 to 5.0 V TEXT IN ILLUSTRATION *a Front view of wire harness connector (to Camshaft Position Sensor) NG --> REPAIR OR REPLACE HARNESS OR CONNECTOR OK: Go to next step
2. CHECK HARNESS AND CONNECTOR (ECM - CAMSHAFT POSITION SENSOR) Disconnect the camshaft position 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 C41-1 (G2) - C28-9 (G2) Always Below 1 ohms C41-2 (G-) - C28-10 (G2-) Always Below 1 ohms C41-1 (G2) or C28-9 (G2) - Body ground Always 10 kohms or higher C41-2 (G-) or C28-10 (G2-) - Body ground Always 10 kohms or higher NG --> REPAIR OR REPLACE HARNESS OR CONNECTOR OK: Go to next step
3. CHECK SENSOR INSTALLATION Check the camshaft position sensor installation. OK The camshaft position sensor is installed properly. NG --> See step 8 OK: Go to next step
4. INSPECT CAMSHAFT TIMING GEAR ASSEMBLY (SENSOR PLATE TOOTH) Check the teeth of the sensor plate. OK Sensor plate teeth do not have any cracks or deformation. NG --> See step 9 OK: Go to next step
5. REPLACE CAMSHAFT POSITION SENSOR Replace the camshaft position sensor. Refer to «REMOVAL»(ref-524262-S27580867712013012800000) . NEXT: Go to next step
6. CHECK WHETHER DTC OUTPUT RECURS Connect the Techstream to the DLC3. Turn the engine switch on (IG). Turn the Techstream on. Clear DTCs. Refer to «DTC CHECK / CLEAR»(ref-524126-S41645429092013012800000) . Drive the vehicle in accordance with the driving pattern described in Confirmation Driving Pattern. Read DTCs. RESULT Result Proceed to No DTC is output A P1340, P1342 and/or P1343 is output B HINT: If the engine does not start, replace the ECM. B --> See step 7 A --> END
7. REPLACE ECM. Refer to «REMOVAL»(ref-524262-S01887464392013012800000)
8. SECURELY REINSTALL SENSOR. Refer to «INSTALLATION»(ref-524262-S17322198632013012800000)
9. REPLACE CAMSHAFT TIMING GEAR ASSEMBLY. Refer to «REMOVAL»(ref-524246-S42817166632013012800000)

HINT

1. In contrast to normal malfunction diagnosis for components, circuits and systems, DTCs P1603 and P1605 are used to determine the malfunctioning area from the problem symptoms and freeze frame data when the user mentions problems such as engine stall. As these DTCs can be stored as a result of certain user actions, even if these DTCs are output, if the customer makes no mention of problems, clear these DTCs without performing any troubleshooting and return the vehicle to the customer.
2. If any other DTCs are output, perform troubleshooting for those DTCs first.
3. Use any information from the customer problem analysis about the condition of the vehicle at the time when the problem occurred (how the engine stopped, conditions when the engine was restarted, etc.) as a reference. Symptom Suspected Area Engine vibration occurs and engine stops Air-fuel ratio abnormal Engine stops with no engine vibration Ignition system, injection stoppage, high load from external parts Engine can be started with accelerator pedal depressed Insufficient air volume Rough idling after engine started Air-fuel ratio abnormal, abnormal combustion
4. Read freeze frame data using the Techstream. Freeze frame data records engine conditions when a malfunction occurs. This information can be useful when troubleshooting.
5. When confirming the freeze frame data, be sure to check all 5 sets of freeze frame data. Refer to «FREEZE FRAME DATA»(ref-524126-S18115652042013012800000) .
6. When DTC P1603 (Engine Stall History) is stored, DTC P1605 (Rough Idling) is also stored. When confirming freeze frame data, check DTC P1605. The ECM stores DTC P1605 first. Therefore, 5 sets of freeze frame data can be confirmed through DTC P1605, enabling the technician to obtain more information.
7. When confirming freeze frame data, if there are multiple items related to the cause of the malfunction, perform troubleshooting for all related items.
8. Try to operate the vehicle under the conditions recorded in the freeze frame data which were present when the malfunction occurred. Confirm the data at this time and the data when the engine is idling (engine warmed up, no load, and shift lever in D or N) and compare these data with the freeze frame data.
9. Inspections take into account the fact that the malfunction may not have reoccurred and place emphasis on checking the vehicle conditions present at the time when the malfunction occurred.
10. When performing inspections, jiggle the relevant wire harnesses and connectors in an attempt to reproduce malfunctions that do not always occur.

Inspection flow

Using freeze frame data, narrow down the parts to be inspected according to the vehicle conditions at the time when the malfunction occurred.

P1603

Scheme 170

1

1. If the engine stalled when the intake air volume was low (during idling or deceleration), there may be a decrease in torque due to an incorrect air-fuel ratio, etc.
2. If the engine stalled when the intake air volume was high (during driving or acceleration), there may be a major malfunction such as continuous misfire due to ignition stoppage, fuel injection stoppage, etc. and the torque drops to zero.

2

1. If the engine speed decreased slowly, there may have been a decrease in torque due to an air-fuel ratio that was incorrect (by approximately 20 to 30%), etc.
2. If the engine speed decreased rapidly, there may have been a malfunction such as when the engine misfires almost continuously due to ignition stoppage, fuel injection stoppage, etc., or when the external load increases due to an external part malfunctioning.

3

1. If the air-fuel ratio is abnormal, there may have been an intake air leak, sensor malfunction, or fuel supply problem.
2. If the vehicle was normal, the air volume may have been insufficient, the ignition timing may have been incorrect or the EGR valve may have been stuck open.

P1603 inspection flow: Narrow down the parts to be inspected according to the vehicle conditions at the time when the malfunction occurred (freeze frame data).

P1605

Scheme 171

1

1. If the engine speed decreased slowly, there may have been a decrease in torque due an air-fuel ratio that was incorrect (by approximately 20 to 30%), etc.
2. If the engine speed decreased rapidly, there may have been a malfunction such as when the engine misfires almost continuously due to ignition stoppage, fuel injection stoppage, etc., or when the external load increases due to an external part malfunctioning.

2

1. If the air-fuel ratio is abnormal, there may have been an intake air leak, sensor malfunction, or fuel supply problem.
2. If the vehicle was normal, the air volume may have been insufficient, the ignition timing may have been incorrect or the EGR valve may have been stuck open.

P1605 inspection flow: Narrow down the parts to be inspected according to the vehicle conditions at the time when the malfunction occurred (freeze frame data).

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

Scheme 172

Scheme 173

Scheme 174

Scheme 175

Scheme 176

Scheme 177

Scheme 178

Scheme 179

Scheme 180

Scheme 181

1. CHECK FOR ANY OTHER DTCS OUTPUT Connect the Techstream to the DLC3. Turn the engine switch on (IG). Read the DTCs. Refer to «DTC CHECK / CLEAR»(ref-524126-S41645429092013012800000) . RESULT Result Proceed to Only DTC P1603 and P1605 are output A DTCs other than P1603 and P1605 are output B B --> See step 89 A: Go to next step
2. READ FREEZE FRAME DATA Connect the Techstream to the DLC3. Turn the engine 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»(ref-524126-S18115652042013012800000) . RESULT Problem Symptom Freeze Frame Data Item for DTC P1605 Suspected Area Proceed to Closed Throttle Position SW Engine Speed Total of Short FT and Long FT When idling or decelerating, engine speed slowly decreases and engine stalls All 5 sets of freeze frame data are ON Decreases slowly*1 All 5 sets of freeze frame data are +15% or more*2 Air suction Sensor malfunction (value from sensor too lean) Fuel supply problem A At least 1 of the 5 sets of freeze frame data is -15% or less*3 Sensor malfunction (value from sensor too rich) B All 5 sets of freeze frame data are from -15% to +15% Intake air volume insufficient Ignition timing incorrect C When idling or decelerating, engine speed rapidly decreases and engine stalls Decreases rapidly*1 - Injection stoppage, ignition stoppage Load from external parts D When accelerating or driving at constant speed, engine stalls*4 At least one is OFF - - Sensor malfunction Injection stoppage, ignition stoppage Fuel supply problem E HINT: *1: A rapid decrease in engine speed may be caused by an electrical fault in the shared wiring of all or a number of cylinders, an increase in load from external parts, etc. The engine speed is considered to have decreased rapidly if either of the following conditions applies. Otherwise, the engine speed is considered to have decreased slowly. In the freeze frame data, the decrease in engine speed from #3 to #5 is 400 rpm or more. In the freeze frame data, the engine speed at #5 is 120 rpm or less. If the vehicle speed is 30 km/h (18.65 mph) or less and the difference between Engine Speed and SPD (NT) is 100 rpm or less, inspect the automatic transmission. Depending on the rate of vehicle deceleration, the engine speed may have decreased due to the A/T lock-up release being late. *2: When a DTC is stored, feedback compensation increases because the air-fuel ratio is determined to be lean. *3: When a DTC is stored, feedback compensation decreases because the air-fuel ratio is determined to be rich. *4: This item should be checked when DTC P1603 is output and is not necessary to check when only P1605 is output. B --> See step 23 C --> See step 33 D --> See step 43 E --> See step 50 A: Go to next step
3. CHECK INTAKE SYSTEM Check for air leakage in the intake system [due to vacuum hose disconnection, cracks, damaged gaskets, etc.]. Refer to «ON-VEHICLE INSPECTION - Step 3»(ref-524270-S25831447522013012800000) . HINT: If the accelerator pedal is released after racing the engine, the inspection is easier to perform because the vacuum inside the intake pipes increases and the air suction noise becomes louder. If Short FT and Long FT are largely different from the normal values when idling (the intake air volume is small) and almost the same as the normal values when racing the engine (the intake air volume is high), air leakage may be present. OK There is no air leakage. NG --> REPAIR OR REPLACE INTAKE SYSTEM OK: Go to next step
4. CHECK PURGE VSV Disconnect the purge hose (on the canister side) of the purge VSV. Start the engine. Idle the engine. Disconnect the connector of the purge VSV. Check if air flows through the purge VSV. OK Air does not flow. Connect the connector of the purge VSV. Connect the purge hose of the purge VSV. HINT: When this inspection is performed, the MIL may illuminate. After finishing the inspection, check and clear DTCs. Refer to «DTC CHECK / CLEAR»(ref-524126-S41645429092013012800000) . NG --> See step 60 OK: Go to next step
5. READ FREEZE FRAME DATA Connect the Techstream to the DLC3. Turn the engine 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»(ref-524126-S18115652042013012800000) . RESULT Freeze Frame Data Item for DTC P1605 Result Suspected Area Proceed to Calculate Load Below 90% of the current value of the vehicle*1 Mass air flow meter assembly A AFS Voltage B1S1 3.3 V or higher*2 Air fuel ratio sensor Wire harness or connector Actual air-fuel ratio abnormal B Both freeze frame data items listed above Values are other than above - C HINT: Try to operate the vehicle under the conditions recorded in the freeze frame data which were present when the malfunction occurred. Confirm the data at this time and the data when the engine is idling (engine warmed up, no load, and shift lever in D or N) and compare these data with the freeze frame data. *1: If the mass air flow meter is malfunctioning and incorrectly measures the pressure to be less than the actual intake manifold pressure, the freeze frame data will show a low engine load value. *2: If the air fuel ratio sensor is malfunctioning and constantly outputs a value indicating the air-fuel ratio is lean, the actual air-fuel ratio will become rich and the engine may stall. B --> See step 7 C --> See step 10 A: Go to next step
6. CHECK MASS AIR FLOW METER ASSEMBLY Remove the mass air flow meter assembly. Check for foreign matter in the airflow passage of the mass air flow meter. RESULT Result Proceed to Visible foreign matter is present A Visible foreign matter is not present B Install the mass air flow meter assembly. HINT: Even if the results are normal, the mass air flow meter may have been malfunctioning. Continue this inspection procedure until step 22, and if there are no problems with other parts, replace the mass air flow meter assembly (refer to step 57). B --> See step 10 A --> See step 61
7. PERFORM ACTIVE TEST USING TECHSTREAM (CONTROL THE INJECTION VOLUME) Connect the Techstream to the DLC3. Turn the engine switch on (IG). Start the engine, turn off all accessory switches and warm up the engine until the engine coolant temperature stabilizes. Idle the engine. Enter the following menus: Powertrain / Engine and ECT / Active Test / Control the Injection Volume. Read the output voltage from the air fuel ratio sensor when increasing and decreasing the fuel injection volume. Standard Techstream Display Specified Condition Control the Injection Volume (12%) Air fuel ratio sensor output voltage is below 3.1 V Control the Injection Volume (-12%) Air fuel ratio sensor output voltage is higher than 3.4 V RESULT Result Proceed to Abnormal A Normal B HINT: 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. Even if the results are normal, the air fuel ratio sensor may have been malfunctioning. Continue this inspection procedure until step 22, and if there are no problems with other parts, replace the air fuel ratio sensor (refer to step 57). B --> See step 10 A: Go to next step
8. CHECK TERMINAL VOLTAGE (AIR FUEL RATIO SENSOR POWER SOURCE) Disconnect the air fuel ratio sensor connector. Turn the engine switch on (IG). Measure the voltage according to the value(s) in the table below. Standard Voltage Tester Connection Switch Condition Specified Condition C20-2 (+B) - Body ground Engine switch on (IG) 11 to 14 V C19-2 (+B) - Body ground Engine switch on (IG) 11 to 14 V TEXT IN ILLUSTRATION *A Bank 1 *B Bank 2 *a Front view of wire harness connector (to Air Fuel Ratio Sensor) HINT: Jiggle the wire harness and connector to increase the likelihood of detecting malfunctions that do not always occur. Make sure there is not an excessive amount of force applied to the wire harness. NG --> See step 62 OK: Go to next step
9. 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 C20-1 (HA1A) - C31-17 (HA1A) Always Below 1 ohms C20-3 (A1A+) - C30-1 (A1A+) Always Below 1 ohms C20-4 (A1A-) - C30-2 (A1A-) Always Below 1 ohms C19-1 (HA2A) - C31-19 (HA2A) Always Below 1 ohms C19-3 (A2A+) - C30-7 (A2A+) Always Below 1 ohms C19-4 (A2A-) - C30-8 (A2A-) Always Below 1 ohms C20-1 (HA1A) or C31-17 (HA1A) - Body ground Always 10 kohms or higher C20-3 (A1A+) or C30-1 (A1A+) - Body ground Always 10 kohms or higher C20-4 (A1A-) or C30-2 (A1A-) - Body ground Always 10 kohms or higher C19-1 (HA2A) or C31-19 (HA2A) - Body ground Always 10 kohms or higher C19-3 (A2A+) or C30-7 (A2A+) - Body ground Always 10 kohms or higher C19-4 (A2A-) or C30-8 (A2A-) - Body ground Always 10 kohms or higher RESULT Result Proceed to Abnormal A Normal B HINT: Jiggle the wire harness and connector to increase the likelihood of detecting malfunctions that do not always occur. Make sure there is not an excessive amount of force applied to the wire harness. B --> See step 63 A --> REPAIR OR REPLACE HARNESS OR CONNECTOR
10. READ FREEZE FRAME DATA Connect the Techstream to the DLC3. Turn the engine 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»(ref-524126-S18115652042013012800000) . RESULT Freeze Frame Data Item for DTC P1605 Result Proceed to Initial Engine Coolant Temp, Ambient Temperature, Initial Intake Air Temp Difference in temperature between each item is less than 10°C*1 A Difference in temperature between each item is 10°C or more*2 B HINT: *1: A long time had elapsed after stopping the engine. *2: A long time had not elapsed after stopping the engine. B --> See step 13 A: Go to next step
11. READ FREEZE FRAME DATA Connect the Techstream to the DLC3. Turn the engine 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»(ref-524126-S18115652042013012800000) . RESULT Freeze Frame Data Item for DTC P1605 Result Suspected Area Proceed to Initial Engine Coolant Temp, Coolant Temp, Engine Run Time Range A Engine coolant temperature sensor Thermostat A Range B Engine coolant temperature sensor B Range C - C HINT: This step is not directly related to engine stall. B --> See step 14 C --> See step 15 A: Go to next step
12. INSPECT THERMOSTAT HINT: For the thermostat inspection, refer to the following procedures. Refer to «INSPECTION - Step 1»(ref-524250-S25180397372013012800000) . RESULT Result Proceed to Abnormal A Normal B HINT: This step is not directly related to engine stall. B --> See step 14 A --> See step 64
13. READ FREEZE FRAME DATA Connect the Techstream to the DLC3. Turn the engine 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»(ref-524126-S18115652042013012800000) . RESULT Freeze Frame Data Item for DTC P1605 Result Suspected Area Proceed to Coolant Temp 120°C or higher Engine coolant temperature sensor A Coolant Temp, Ambient Temperature Engine coolant temperature is lower than outside temperature by 15°C or more Engine coolant temperature sensor Both freeze frame data items listed above Values are other than above - B B --> See step 15 A: Go to next step
14. INSPECT ENGINE COOLANT TEMPERATURE SENSOR HINT: For the engine coolant temperature sensor inspection, refer to the following procedures. Refer to «INSPECTION - Step 1»(ref-524262-S31343895302013012800000) . RESULT Result Proceed to Abnormal A Normal B HINT: Even if the results are normal, the engine coolant temperature sensor may have been malfunctioning. Continue this inspection procedure until step 22, and if there are no problems with other parts, replace the engine coolant temperature sensor (refer to step 57). B --> See step 15 A --> See step 65
15. READ FREEZE FRAME DATA Connect the Techstream to the DLC3. Turn the engine 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»(ref-524126-S18115652042013012800000) . RESULT Freeze Frame Data Item for DTC P1605 Result Suspected Area Proceed to EVAP (Purge) VSV At least 1 of the 5 sets of freeze frame data is not 0% Purge VSV A All 5 sets of freeze frame data are 0% - B HINT: If the purge VSV is stuck closed, air-fuel ratio compensation by the purge VSV is incorrectly adjusted, and then the air-fuel ratio becomes lean and the engine may stall. B --> See step 20 A: Go to next step
16. PERFORM ACTIVE TEST USING TECHSTREAM (ACTIVATE THE VSV FOR EVAP CONTROL) Disconnect the purge hose (on the canister side) of the purge VSV. Connect the Techstream to the DLC3. Turn the engine switch on (IG). Start the engine. Enter the following menus: Powertrain / Engine and ECT / Active Test / Activate the VSV for Evap Control. Operate the purge VSV and check the airflow. Standard Activate the VSV for Evap Control Specified Condition ON Air flows OFF Air does not flow RESULT Result Proceed to Abnormal A Normal B HINT: Jiggle the wire harness and connector to increase the likelihood of detecting malfunctions that do not always occur. Even if the results are normal, the purge VSV may have been malfunctioning. Continue this inspection procedure until step 22. B --> See step 20 A: Go to next step
17. INSPECT PURGE VSV Inspect the purge VSV. Refer to «INSPECTION - Step 1»(ref-524251-S38986652952013012800000) . NG --> See step 66 OK: Go to next step
18. CHECK TERMINAL VOLTAGE (PURGE VSV POWER SOURCE) Disconnect the purge VSV connector. Turn the engine switch on (IG). Measure the voltage according to the value(s) in the table below. Standard Voltage Tester Connection Switch Condition Specified Condition C8-1 - Body ground Engine switch on (IG) 11 to 14 V TEXT IN ILLUSTRATION *a Front view of wire harness connector (to Purge VSV) HINT: Jiggle the wire harness and connector to increase the likelihood of detecting malfunctions that do not always occur. Make sure there is not an excessive amount of force applied to the wire harness. NG --> REPAIR POWER SOURCE CIRCUIT OK: Go to next step
19. CHECK HARNESS AND CONNECTOR (PURGE VSV - ECM) Disconnect the purge VSV connector. Disconnect the ECM connector. Measure the resistance according to the value(s) in the table below. Standard Resistance Tester Connection Condition Specified Condition C8-2 - C30-18 (PRG) Always Below 1 ohms C8-2 or C30-18 (PRG) - Body ground Always 10 kohms or higher HINT: Jiggle the wire harness and connector to increase the likelihood of detecting malfunctions that do not always occur. Make sure there is not an excessive amount of force applied to the wire harness. NG --> REPAIR OR REPLACE HARNESS OR CONNECTOR OK --> See step 67
20. PERFORM ACTIVE TEST USING TECHSTREAM (CONTROL THE FUEL PUMP / SPEED) Connect the Techstream to the DLC3. Turn the engine switch on (IG). Enter the following menus: Powertrain / Engine and ECT / Active Test / Control the Fuel Pump / Speed. When performing the Active Test, check for an operating sound from the fuel pump. Standard Control the Fuel Pump / Speed Specified Condition ON Operating sound heard OFF Operating sound not heard RESULT Result Proceed to Abnormal A Normal B HINT: Jiggle the wire harness and connector to increase the likelihood of detecting malfunctions that do not always occur. While performing the Active Test, make sure that there is no fuel leakage from the pipes, no signs that fuel has leaked, and no fuel smell. If the fuel pump operating noise is abnormal, proceed to step 21. B --> See step 22 A: Go to next step
21. INSPECT FUEL PUMP Inspect the fuel pump. Refer to «INSPECTION - Step 1»(ref-524269-S37352554872013012800000) . NG --> See step 69 OK --> See step 68
22. CHECK FUEL SYSTEM Check for foreign matter, such as iron particles, around the fuel pump, fuel pump filter and inside the fuel tank, and for signs that the fuel pump was stuck. RESULT Result Proceed to There is foreign matter or signs that fuel pump was stuck A There is no foreign matter and no signs that fuel pump was stuck B HINT: If there is foreign matter such as iron particles on the fuel pump, fuel filter or fuel tank, remove the foreign matter. B --> See step 57 A --> REPAIR OR REPLACE FUEL SYSTEM
23. READ FREEZE FRAME DATA Connect the Techstream to the DLC3. Turn the engine 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»(ref-524126-S18115652042013012800000) . RESULT Freeze Frame Data Item for DTC P1605 Result Suspected Area Proceed to Calculate Load 110% or more of the current value of the vehicle*1 Mass air flow meter assembly A AFS Voltage B1S1 Below 3.3 V*2 Air fuel ratio sensor Harness and connector Actual air-fuel ratio abnormal B Both freeze frame data items listed above Values are other than above - C HINT: Try to operate the vehicle under the conditions recorded in the freeze frame data which were present when the malfunction occurred. Confirm the data at this time and the data when the engine is idling (engine warmed up, no load, and shift lever in D or N) and compare these data with the freeze frame data. *1: If the mass air flow meter is malfunctioning and incorrectly measures the intake air volume to be higher than the actual volume of air flowing through the intake manifold, the freeze frame data will show a high engine load value. *2: As the air fuel ratio sensor output is low before the sensor warms up, the value at that time cannot be used for diagnosis. If the air fuel ratio sensor is malfunctioning and constantly outputs a value indicating the air-fuel ratio is rich, the actual air-fuel ratio will become lean and the engine may stall. B --> See step 25 C --> See step 28 A: Go to next step
24. CHECK MASS AIR FLOW METER ASSEMBLY Remove the mass air flow meter assembly. Check for foreign matter in the airflow passage of the mass air flow meter. RESULT Result Proceed to Visible foreign matter is present A Visible foreign matter is not present B HINT: Even if the results are normal, the mass air flow meter may have been malfunctioning. Continue this inspection procedure until step 32, and if there are no problems with other parts, replace the mass air flow meter assembly (refer to step 57). B --> See step 28 A --> See step 70
25. PERFORM ACTIVE TEST USING TECHSTREAM (CONTROL THE INJECTION VOLUME) Connect the Techstream to the DLC3. Turn the engine switch on (IG). Start the engine, turn off all accessory switches and warm up the engine until the engine coolant temperature stabilizes. Idle the engine. Enter the following menus: Powertrain / Engine and ECT / Active Test / Control the Injection Volume. Read the output voltage from the air fuel ratio sensor when increasing and decreasing the fuel injection volume. Standard Techstream Display Specified Condition Control the Injection Volume (12%) Air fuel ratio sensor output voltage is below 3.1 V Control the Injection Volume (-12%) Air fuel ratio sensor output voltage is higher than 3.4 V RESULT Result Proceed to Abnormal A Normal B HINT: 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. Even if the results are normal, the air fuel ratio sensor may have been malfunctioning. Continue this inspection procedure until step 32, and if there are no problems with other parts, replace the air fuel ratio sensor (refer to step 57). B --> See step 28 A: Go to next step
26. CHECK TERMINAL VOLTAGE (AIR FUEL RATIO SENSOR POWER SOURCE) Disconnect the air fuel ratio sensor connector. Turn the engine switch on (IG). Measure the voltage according to the value(s) in the table below. Standard Voltage Tester Connection Switch Condition Specified Condition C20-2 (+B) - Body ground Engine switch on (IG) 11 to 14 V C19-2 (+B) - Body ground Engine switch on (IG) 11 to 14 V TEXT IN ILLUSTRATION *A Bank 1 *B Bank 2 *a Front view of wire harness connector (to Air Fuel Ratio Sensor) HINT: Jiggle the wire harness and connector to increase the likelihood of detecting malfunctions that do not always occur. Make sure there is not an excessive amount of force applied to the wire harness. NG --> See step 71 OK: Go to next step
27. 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 C20-1 (HA1A) - C31-17 (HA1A) Always Below 1 ohms C20-3 (A1A+) - C30-1 (A1A+) Always Below 1 ohms C20-4 (A1A-) - C30-2 (A1A-) Always Below 1 ohms C19-1 (HA2A) - C31-19 (HA2A) Always Below 1 ohms C19-3 (A2A+) - C30-7 (A2A+) Always Below 1 ohms C19-4 (A2A-) - C30-8 (A2A-) Always Below 1 ohms C20-1 (HA1A) or C31-17 (HA1A) - Body ground Always 10 kohms or higher C20-3 (A1A+) or C30-1 (A1A+) - Body ground Always 10 kohms or higher C20-4 (A1A-) or C30-2 (A1A-) - Body ground Always 10 kohms or higher C19-1 (HA2A) or C31-19 (HA2A) - Body ground Always 10 kohms or higher C19-3 (A2A+) or C30-7 (A2A+) - Body ground Always 10 kohms or higher C19-4 (A2A-) or C30-8 (A2A-) - Body ground Always 10 kohms or higher HINT: Jiggle the wire harness and connector to increase the likelihood of detecting malfunctions that do not always occur. Make sure there is not an excessive amount of force applied to the wire harness. NG --> REPAIR OR REPLACE HARNESS AND CONNECTOR OK --> See step 72
28. READ FREEZE FRAME DATA Connect the Techstream to the DLC3. Turn the engine 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»(ref-524126-S18115652042013012800000) . RESULT Freeze Frame Data Item for DTC P1605 Result Proceed to Initial Engine Coolant Temp, Ambient Temperature, Initial Intake Air Temp Difference in temperature between each item is less than 10°C*1 A Difference in temperature between each item is 10°C or more*2 B HINT: *1: A long time had elapsed after stopping the engine. *2: A long time had not elapsed after stopping the engine. B --> See step 31 A: Go to next step
29. READ FREEZE FRAME DATA Connect the Techstream to the DLC3. Turn the engine switch on (IG). Using the Techstream, confirm the vehicle conditions present when the DTC was stored which are recorded in the freeze frame data. RESULT Freeze Frame Data Item for DTC P1605 Result Suspected Area Proceed to Initial Engine Coolant Temp, Coolant Temp, Engine Run Time Range A Engine coolant temperature sensor Thermostat A Range B Engine coolant temperature sensor B Range C - C HINT: This step is not directly related to engine stall. B --> See step 32 C --> See step 58 A: Go to next step
30. INSPECT THERMOSTAT HINT: For the thermostat inspection, refer to the following procedures. Refer to «INSPECTION - Step 1»(ref-524250-S25180397372013012800000) . RESULT Result Proceed to Abnormal A Normal B HINT: This step is not directly related to engine stall. B --> See step 32 A --> See step 73
31. READ FREEZE FRAME DATA Connect the Techstream to the DLC3. Turn the engine 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»(ref-524126-S18115652042013012800000) . RESULT Freeze Frame Data Item for DTC P1605 Result Suspected Area Proceed to Coolant Temp 120°C or higher Engine coolant temperature sensor A Coolant Temp, Ambient Temperature Engine coolant temperature is lower than outside temperature by 15°C or more Engine coolant temperature sensor Both freeze frame data items listed above Values are other than above - B B --> See step 58 A: Go to next step
32. INSPECT ENGINE COOLANT TEMPERATURE SENSOR HINT: For the engine coolant temperature sensor inspection, refer to the following procedures. Refer to «INSPECTION - Step 1»(ref-524262-S31343895302013012800000) . RESULT Result Proceed to Abnormal A Normal B HINT: Even if the results are normal, the engine coolant temperature sensor may have been malfunctioning. If there are no problems with other parts, replace the engine coolant temperature sensor (refer to step 57). B --> See step 57 A --> See step 74
33. READ FREEZE FRAME DATA Connect the Techstream to the DLC3. Turn the engine 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»(ref-524126-S18115652042013012800000) . RESULT Freeze Frame Data Item for DTC P1605 Result Suspected Area Proceed to Total of ISC Learning Value and ISC Feedback Value Below 80% of the current value of the vehicle*1 Throttle body assembly A 120% or more of the current value of the vehicle*2 B From 80 to 120% of the current value of the vehicle - C HINT: Try to operate the vehicle under the conditions recorded in the freeze frame data which were present when the malfunction occurred. Confirm the data at this time and the data when the engine is idling (engine warmed up, no load, and shift lever in D or N) and compare these data with the freeze frame data. *1: If the throttle body assembly has a temporary problem in which it cannot fully close, the intake air volume and engine speed increase. As a result, the ISC compensation amount becomes less than the standard. At this time, if the throttle body assembly returns to normal and fully closes, the intake air volume will be insufficient and the engine may stall. *2: If carbon accumulates on the throttle body assembly and the intake air volume decreases, the ISC compensation amount is increased to maintain the idling speed. If this situation continues, the ISC compensation amount reaches the upper limit, the idling speed cannot be maintained causing idling to become unstable, and the engine may stall. B --> See step 35 C --> See step 36 A: Go to next step
34. CHECK THROTTLE BODY ASSEMBLY Check for foreign matter and signs that the throttle body was stuck, and also check that the valve and shaft move smoothly during operation. RESULT Result Proceed to Abnormal A Normal B HINT: Even if the results are normal, the throttle body may have been malfunctioning. Continue this inspection procedure until step 42, and if there are no problems with other parts, replace the throttle body assembly (refer to step 57). B --> See step 36 A --> See step 75
35. CHECK THROTTLE BODY ASSEMBLY Check if carbon is in the airflow passage of the throttle body. RESULT Result Proceed to Carbon in passage A No carbon in passage B HINT: Even if the results are normal, the throttle body may have been malfunctioning. Continue this inspection procedure until step 42, and if there are no problems with other parts, replace the throttle body assembly (refer to step 57). B --> See step 36 A --> See step 76
36. PERFORM ACTIVE TEST USING TECHSTREAM (CONTROL THE VVT SYSTEM) Connect the Techstream to the DLC3. Turn the Techstream on. Warm up the engine. Enter the following menus: Powertrain / Engine and ECT / Active Test / Control the VVT System (Bank 1) or Control the VVT System (Bank 2). HINT: When performing the Active Test, make sure the A/C is on and the shift lever is in N or P. Check the engine speed while operating the camshaft timing oil control valve using the Techstream. OK Techstream Operation Specified Condition OFF Normal engine speed ON Soon after camshaft timing oil control valve switched from OFF to ON, engine idles roughly or stalls RESULT Result Proceed to NG A OK B HINT: Jiggle the wire harness and connector to increase the likelihood of detecting malfunctions that do not always occur. When the results of the inspection using the Active Test are normal but the valve operating noise is abnormal, check the valve for any signs of problems. If the camshaft timing oil control valve is stuck ON, the valve overlap increases and combustion worsens due to the internal EGR which may cause rough idle or cause the engine to stall. NG --> See step 77 OK: Go to next step
37. PERFORM ACTIVE TEST USING TECHSTREAM (CONTROL THE VVT EXHAUST LINEAR) Connect the Techstream to the DLC3. Turn the Techstream on. Warm up the engine. Enter the following menus: Powertrain / Engine and ECT / Active Test / Control the VVT Exhaust Linear (Bank1) or Control the VVT Exhaust Linear (Bank2). HINT: When performing the Active Test, make sure the A/C is on and the shift lever is in N or P. Check the engine speed while operating the camshaft timing oil control valve using the Techstream. OK Techstream Operation Specified Condition 0% Normal engine speed 100% Engine idles roughly or stalls HINT: Jiggle the wire harness and connector to increase the likelihood of detecting malfunctions that do not always occur. When the results of the inspection using the Active Test are normal but the valve operating noise is abnormal, check the valve for any signs of problems. If the camshaft timing oil control valve is stuck ON, the valve overlap increases and combustion worsens due to the internal EGR which may cause rough idle or cause the engine to stall. NG --> See step 92 OK: Go to next step
38. PERFORM ACTIVE TEST USING TECHSTREAM (CONTROL THE EGR STEP POSITION) Connect the Techstream to the DLC3. Start the engine and warm it up until the engine coolant temperature reaches 75°C (167°F) or higher. HINT: When performing the Active Test, make sure the shift lever is in P or N. The A/C switch and all accessory switches should be off. Turn the Techstream on. Enter the following menus: Powertrain / Engine and ECT / Active Test / Control the EGR Step Position. Confirm that Throttle Idle Position is ON and check the engine idling condition and the value of MAP 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. OK MAP and idling condition change in response to EGR step position as follows. Standard - EGR Step Position (Active Test) Step 0 Step 0 to 30 Idling condition Steady idling Idling changes from steady to rough idling or engine stalls MAP (Data List) 20 to 40 kPa (150 to 300 mmHg) MAP value is at least 10 kPa (75 mmHg) higher than when EGR valve is fully closed OK --> See step 40 NG --> See step 39
39. INSPECT EGR VALVE ASSEMBLY Remove the EGR valve assembly. Refer to «REMOVAL»(ref-524251-S06751532262013012800000) . Check if the EGR valve is stuck open. OK EGR valve is tightly closed. NG --> See step 93 OK: Go to next step
40. CHECK FREEZE FRAME DATA Connect the Techstream to the DLC3. Turn the engine 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»(ref-524126-S18115652042013012800000) . RESULT Freeze Frame Data Item for DTC P1605 Suspected Area Proceed to IGN Advance Knock Correct Learn Value Differs from the current value of the vehicle by 10° or more Less than 3° Engine coolant temperature sensor Mass air flow meter assembly Knock sensor A 3° or more - B Differs from the current value of the vehicle by less than 10° - - HINT: Try to operate the vehicle under the conditions recorded in the freeze frame data which were present when the malfunction occurred. Confirm the data at this time and the data when the engine is idling (engine warmed up, no load, and shift lever in D or N) and compare these data with the freeze frame data. Even if the results are normal, the knock sensors may have been malfunctioning. If there are no problems with other parts, replace the knock sensors (refer to step 57). B --> See step 57 A: Go to next step
41. INSPECT ENGINE COOLANT TEMPERATURE SENSOR Inspect the engine coolant temperature sensor. Refer to «INSPECTION - Step 1»(ref-524262-S31343895302013012800000) . NG --> See step 78 OK: Go to next step
42. INSPECT MASS AIR FLOW METER ASSEMBLY Inspect the mass air flow meter assembly. Refer to «INSPECTION - Step 1»(ref-524262-S35310282362013012800000) . NG --> See step 80 OK --> See step 79
43. CHECK TERMINAL VOLTAGE (FUEL INJECTOR POWER SOURCE) Disconnect the fuel injector connector. Turn the engine switch on (IG). Measure the voltage according to the value(s) in the table below. Standard Voltage Cylinder Tester Connection Switch Condition Specified Condition No. 1 E1-2 - Ground Engine switch on (IG) 11 to 14 V No. 2 n1-2 - Ground Engine switch on (IG) 11 to 14 V No. 3 E2-2 - Ground Engine switch on (IG) 11 to 14 V No. 4 n2-2 - Ground Engine switch on (IG) 11 to 14 V No. 5 E3-2 - Ground Engine switch on (IG) 11 to 14 V No. 6 n3-2 - Ground Engine switch on (IG) 11 to 14 V No. 7 E4-2 - Ground Engine switch on (IG) 11 to 14 V No. 8 n4-2 - Ground Engine switch on (IG) 11 to 14 V TEXT IN ILLUSTRATION *a Front view of wire harness connector (to Fuel Injector Assembly) HINT: Jiggle the wire harness and connector to increase the likelihood of detecting malfunctions that do not always occur. Make sure there is not an excessive amount of force applied to the wire harness. A rapid decrease in engine speed may have been caused by a malfunction in all or multiple cylinders. There may be an electrical malfunction in the wiring shared by all the cylinders. NG --> See step 81 OK: Go to next step
44. CHECK TERMINAL VOLTAGE (IGNITION COIL POWER SOURCE) Disconnect the ignition coil connector. Turn the engine switch on (IG). Measure the voltage according to the value(s) in the table below. Standard Voltage Tester Connection Switch Condition Specified Condition C1-1 (+B) - C1-4 (GND) Engine switch on (IG) 11 to 14 V C2-1 (+B) - C2-4 (GND) Engine switch on (IG) 11 to 14 V C3-1 (+B) - C3-4 (GND) Engine switch on (IG) 11 to 14 V C4-1 (+B) - C4-4 (GND) Engine switch on (IG) 11 to 14 V C5-1 (+B) - C5-4 (GND) Engine switch on (IG) 11 to 14 V C6-1 (+B) - C6-4 (GND) Engine switch on (IG) 11 to 14 V C39-1 (+B) - C39-4 (GND) Engine switch on (IG) 11 to 14 V C40-1 (+B) - C40-4 (GND) Engine switch on (IG) 11 to 14 V TEXT IN ILLUSTRATION *a Front view of wire harness connector (to Ignition Coil Assembly) HINT: Jiggle the wire harness and connector to increase the likelihood of detecting malfunctions that do not always occur. Make sure there is not an excessive amount of force applied to the wire harness. A rapid decrease in engine speed may have been caused by a malfunction in all or multiple cylinders. There may be an electrical malfunction in the wiring shared by all the cylinders. NG --> See step 82 OK: Go to next step
45. CHECK FREEZE FRAME DATA Connect the Techstream to the DLC3. Turn the engine 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»(ref-524126-S18115652042013012800000) . RESULT Freeze Frame Data Item Result Suspected Area Proceed to Idle Spark Advn Ctrl (#1 to #8) At least one cylinder shows a value of 4° or more Fuel injector system Ignition coil system A All cylinders show a value of less than 4° - B B --> See step 47 A: Go to next step
46. CHECK FREEZE FRAME DATA Change the location of the ignition coil for the cylinder whose Idle Spark Advn Ctrl (#1 to #8) was 4° or more in step 45. Connect the Techstream to the DLC3. Turn the engine switch on (IG). Enter the following menus: Powertrain / Engine and ECT / Data List / Idle Spark Advn Ctrl (#1 to #8). RESULT Result Proceed to Same as result in step 45 A Different from result in step 45 B HINT: Jiggle the wire harness and connector to increase the likelihood of detecting malfunctions that do not always occur. A --> See step 94 B: Go to next step
47. CHECK FREEZE FRAME DATA Connect the Techstream to the DLC3. Turn the engine 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»(ref-524126-S18115652042013012800000) . RESULT Freeze Frame Data Item for DTC P1605 Suspected Area Proceed to A/C Signal Air Conditioner FB Val Power Steering Signal A/C Signal display changes from OFF to ON*1 Value displayed for Air Conditioner FB Val increases Does not change from OFF A/C system A Changes from OFF to ON Power steering system B A/C Signal display does not change from OFF*1 Value displayed for Air Conditioner FB Val does not increase Changes from OFF to ON Does not change from OFF - HINT: Try to operate the vehicle under the conditions recorded in the freeze frame data which were present when the malfunction occurred. Confirm the data at this time and the data when the engine is idling (engine warmed up, no load, and shift lever in D or N) and compare these data with the freeze frame data. *1: Check not only the on/off state of the air conditioner, but also the change in air conditioner load. The normal value for the ISC learned value is engine displacement (liters) x 0.9. Even if the results are normal, the power steering system may have been malfunctioning. Continue this inspection procedure until step 49, and if there are no problems with other parts, inspect the power steering system (refer to step 57). A --> See step 83 B: Go to next step
48. CHECK FREEZE FRAME DATA Connect the Techstream to the DLC3. Turn the engine 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»(ref-524126-S18115652042013012800000) . RESULT Freeze Frame Data Item for DTC P1605 Suspected Area Proceed to Electrical Load Signal Electric Load Feedback Val Difference between Engine Speed and Turbine Speed Vehicle Speed Electrical Load Signal display changes from OFF to ON*1, or value displayed for Electric Load Feedback Val increases*1 Value displayed for Electric Load Val changes - - Electrical load signal circuit A Value displayed for Electric Load Val does not change At least 1 of the 5 sets of freeze frame data is less than 100 rpm Less than 30 km/h (18.65 mph) A/T system B 30 km/h (18.65 mph) or more - C All 5 sets of freeze frame data are 100 rpm or more - - C Electrical Load Signal display does not change from OFF, or value displayed for Electric Load Feedback Val does not increase - At least 1 of the 5 sets of freeze frame data is less than 100 rpm Less than 30 km/h (18.65 mph) A/T system B 30 km/h (18.65 mph) or more - C All 5 sets of freeze frame data are 100 rpm or more - - C HINT: *1: If the Electrical Load Signal display changes from OFF to ON, or the "Electric Load Feedback Val" increases, it probably is a malfunction due to a change in electrical load. Check the generator and the continuity and connections between the generator and ECM. The normal value for the ISC learned value is engine displacement (liters) x 0.9. Even if the results are normal, the electrical load signal system and/or A/T system may have been malfunctioning. Continue this inspection procedure until step 49, and if there are no problems with other parts, inspect the electrical load system and/or A/T system (refer to step 57). B --> CHECK AUTOMATIC TRANSMISSION SYSTEM C --> See step 49 A --> See step 90
49. CHECK FREEZE FRAME DATA Connect the Techstream to the DLC3. Turn the engine 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»(ref-524126-S18115652042013012800000) . RESULT Freeze Frame Data Item for DTC P1605 Suspected Area Proceed to P Position or N Position Park/Neutral Position Switch P and N position are both OFF in at least one data set In D or R, NSW is ON Park/neutral position switch assembly A In D or R, NSW is OFF A/T system B All 5 sets of freeze frame data are ON - - C HINT: Even if the results are normal, the park/neutral position switch and/or A/T system may have been malfunctioning. If there are no problems with other parts, inspect the park/neutral position switch and/or A/T system (refer to step 57). B --> CHECK AUTOMATIC TRANSMISSION SYSTEM C --> See step 57 A --> See step 84
50. CHECK FREEZE FRAME DATA Connect the Techstream to the DLC3. Turn the engine 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»(ref-524126-S18115652042013012800000) . RESULT Freeze Frame Data Item Result Suspected Area Proceed to Throttle Sensor Position, Calculate Load Calculate Load decreases while Throttle Sensor Position increases Mass air flow meter assembly A Calculate Load does not decrease while Throttle Sensor Position increases - B B --> See step 52 A: Go to next step
51. CHECK MASS AIR FLOW METER ASSEMBLY Remove the mass air flow meter assembly. Check for foreign matter in the airflow passage of the mass air flow meter. RESULT Result Proceed to Visible foreign matter is present A Visible foreign matter is not present B Install the mass air flow meter. HINT: Even if the results are normal, the mass air flow meter may have been malfunctioning. Continue this inspection procedure until step 56, and if there are no problems with other parts, replace the mass air flow meter assembly (refer to step 57). B --> See step 52 A --> See step 85
52. CHECK TERMINAL VOLTAGE (FUEL INJECTOR POWER SOURCE) Disconnect the fuel injector connector. Turn the engine switch on (IG). Measure the voltage according to the value(s) in the table below. Standard Voltage Cylinder Tester Connection Switch Condition Specified Condition No. 1 E1-2 - Ground Engine switch on (IG) 11 to 14 V No. 2 n1-2 - Ground Engine switch on (IG) 11 to 14 V No. 3 E2-2 - Ground Engine switch on (IG) 11 to 14 V No. 4 n2-2 - Ground Engine switch on (IG) 11 to 14 V No. 5 E3-2 - Ground Engine switch on (IG) 11 to 14 V No. 6 n3-2 - Ground Engine switch on (IG) 11 to 14 V No. 7 E4-2 - Ground Engine switch on (IG) 11 to 14 V No. 8 n4-2 - Ground Engine switch on (IG) 11 to 14 V TEXT IN ILLUSTRATION *a Front view of wire harness connector (to Fuel Injector Assembly) HINT: Jiggle the wire harness and connector to increase the likelihood of detecting malfunctions that do not always occur. Make sure there is not an excessive amount of force applied to the wire harness. A rapid decrease in engine speed may have been caused by a malfunction in all or multiple cylinders. There may be an electrical malfunction in the wiring shared by all the cylinders. NG --> See step 86 OK: Go to next step
53. CHECK TERMINAL VOLTAGE (IGNITION COIL POWER SOURCE) Disconnect the ignition coil connector. Turn the engine switch on (IG). Measure the voltage according to the value(s) in the table below. Standard Voltage Tester Connection Switch Condition Specified Condition C1-1 (+B) - C1-4 (GND) Engine switch on (IG) 11 to 14 V C2-1 (+B) - C2-4 (GND) Engine switch on (IG) 11 to 14 V C3-1 (+B) - C3-4 (GND) Engine switch on (IG) 11 to 14 V C4-1 (+B) - C4-4 (GND) Engine switch on (IG) 11 to 14 V C5-1 (+B) - C5-4 (GND) Engine switch on (IG) 11 to 14 V C6-1 (+B) - C6-4 (GND) Engine switch on (IG) 11 to 14 V C39-1 (+B) - C39-4 (GND) Engine switch on (IG) 11 to 14 V C40-1 (+B) - C40-4 (GND) Engine switch on (IG) 11 to 14 V TEXT IN ILLUSTRATION *a Front view of wire harness connector (to Ignition Coil Assembly) HINT: Jiggle the wire harness and connector to increase the likelihood of detecting malfunctions that do not always occur. Make sure there is not an excessive amount of force applied to the wire harness. A rapid decrease in engine speed may have been caused by a malfunction in all or multiple cylinders. There may be an electrical malfunction in the wiring shared by all the cylinders. NG --> See step 87 OK: Go to next step
54. PERFORM ACTIVE TEST USING TECHSTREAM (CONTROL THE FUEL PUMP / SPEED) Connect the Techstream to the DLC3. Turn the engine switch on (IG) Enter the following menus: Powertrain / Engine and ECT / Active Test / Control the Fuel Pump / Speed. When performing the Active Test, check for an operating sound from the fuel pump. Specified Condition Control the Fuel Pump / Speed Specified Condition ON Operating sound heard OFF Operating sound not heard RESULT Result Proceed to Abnormal A Normal B HINT: Jiggle the wire harness and connector to increase the likelihood of detecting malfunctions that do not always occur. While performing the Active Test, make sure that there is no fuel leakage from the pipes, no signs that fuel has leaked, and no fuel smell. If the fuel pump operating noise is abnormal, proceed to step 55. B --> See step 56 A: Go to next step
55. INSPECT FUEL PUMP Inspect the fuel pump. Refer to «INSPECTION - Step 1»(ref-524269-S37352554872013012800000) . NG --> See step 91 OK --> See step 88
56. CHECK FUEL SYSTEM Check for foreign matter, such as iron particles, around the fuel pump, fuel pump filter and inside the fuel tank, and for signs that the fuel pump was stuck. Result Result Proceed to There is foreign matter or signs that fuel pump was stuck A There is no foreign matter and no signs that fuel pump was stuck B B --> See step 57 A --> REPAIR OR REPLACE FUEL SYSTEM
57. REPLACE MALFUNCTIONING PARTS If the malfunction could not be identified in steps 3 to 22, replace the part which is suspected to be malfunctioning according to the step where an inspection was performed. Performed Step Part to Replace Step 6 Mass air flow meter assembly Step 7 Air fuel ratio sensor Step 14 Engine coolant temperature sensor Step 16 Purge VSV Step 22 Fuel pump If the malfunction could not be identified in steps 23 to 32, replace the part which is suspected to be malfunctioning according to the step where an inspection was performed. Performed Step Part to Replace Step 24 Mass air flow meter assembly Step 25 Air fuel ratio sensor Step 32 Engine coolant temperature sensor If the malfunction could not be identified in steps 33 to 42, replace the part which is suspected to be malfunctioning according to the step where an inspection was performed. Performed Step Part to Replace Step 34, 35 Throttle body assembly Step 38, 39 EGR valve assembly Step 40 Knock sensor If the malfunction could not be identified in steps 43 to 49, inspect and repair the part which is suspected to be malfunctioning according to the step where an inspection was performed. Performed Step Inspection Step 47 A/C system inspection and repair Power steering system inspection and repair Step 48 A/T system inspection and repair Electrical load system inspection and repair Step 49 Park/neutral position switch assembly inspection and repair A/T system inspection and repair If the malfunction could not be identified in steps 50 to 56, replace the part which is suspected to be malfunctioning according to the step where an inspection was performed. Performed Step Part to Replace Step 51 Mass air flow meter assembly HINT: Referring to the chart, inspect and repair or replace the part from the step where an inspection was performed. NEXT: Go to next step
58. CLEAR DTC Connect the Techstream to the DLC3. Turn the engine switch on (IG). Clear the DTCs. Refer to «DTC CHECK / CLEAR»(ref-524126-S41645429092013012800000) . NEXT: Go to next step
59. PERFORM CONFIRMATION DRIVING PATTERN Check if engine stall symptoms are present. HINT: If any engine stall symptoms are present, recheck for DTCs and freeze frame data and perform an inspection. NG --> REPAIR OR REPLACE MALFUNCTIONING PARTS OK --> END
60. INSPECT PURGE VSV. Refer to «INSPECTION - Step 1»(ref-524251-S38986652952013012800000)
61. REPLACE MASS AIR FLOW METER ASSEMBLY. Refer to «REMOVAL»(ref-524262-S00293573342013012800000)
62. REPAIR POWER SOURCE CIRCUIT. Refer to «PROCEDURE - Step 2»(ref-524266-S10115256242013012800000)
63. REPLACE AIR FUEL RATIO SENSOR. Refer to «REMOVAL»(ref-524262-S00247626492013012800000)
64. REPLACE THERMOSTAT. Refer to «REMOVAL»(ref-524250-S40977348082013012800000)
65. REPLACE ENGINE COOLANT TEMPERATURE SENSOR. Refer to «REMOVAL»(ref-524262-S05147910282013012800000)
66. REPLACE PURGE VSV. Refer to «REMOVAL»(ref-524251-S39307399192013012800000)
67. REPLACE ECM. Refer to «REMOVAL»(ref-524262-S01887464392013012800000)
68. CHECK FUEL PUMP CONTROL SYSTEM. Refer to «Fuel Pump Control Circuit»(ref-524264-S32606429692013012800000)
69. REPLACE FUEL PUMP. Refer to «REMOVAL»(ref-524269-S41706281042013012800000)
70. REPLACE MASS AIR FLOW METER ASSEMBLY. Refer to «REMOVAL»(ref-524262-S00293573342013012800000)
71. REPAIR POWER SOURCE CIRCUIT. Refer to «PROCEDURE - Step 2»(ref-524266-S10115256242013012800000)
72. REPLACE AIR FUEL RATIO SENSOR. Refer to «REMOVAL»(ref-524262-S00247626492013012800000)
73. REPLACE THERMOSTAT. Refer to «REMOVAL»(ref-524250-S40977348082013012800000)
74. REPLACE ENGINE COOLANT TEMPERATURE SENSOR. Refer to «REMOVAL»(ref-524262-S05147910282013012800000)
75. REPLACE THROTTLE BODY ASSEMBLY. Refer to «REMOVAL»(ref-524262-S00817459492013012800000)
76. REPLACE THROTTLE BODY ASSEMBLY. Refer to «REMOVAL»(ref-524262-S00817459492013012800000)
77. REPLACE CAMSHAFT TIMING OIL CONTROL VALVE ASSEMBLY. Refer to «REMOVAL»(ref-524262-S07212957182013012800000)
78. REPLACE ENGINE COOLANT TEMPERATURE SENSOR. Refer to «REMOVAL»(ref-524262-S05147910282013012800000)
79. REPLACE KNOCK SENSOR. Refer to «REMOVAL»(ref-524262-S22270313772013012800000)
80. REPLACE MASS AIR FLOW METER ASSEMBLY. Refer to «REMOVAL»(ref-524262-S00293573342013012800000)
81. REPAIR FUEL INJECTOR CIRCUIT. Refer to «Fuel Injector Circuit»(ref-524264-S03958269082013012800000)
82. REPAIR POWER SOURCE CIRCUIT. Refer to «PROCEDURE - Step 1»(ref-524266-S28511242032013012800000)
83. CHECK AIR CONDITIONING SYSTEM. Refer to «HOW TO PROCEED WITH TROUBLESHOOTING»(ref-524121-S09246008172013012800000)
84. CHECK PARK/NEUTRAL POSITION SWITCH ASSEMBLY. Refer to «INSPECTION - Step 1»(ref-524256-S29021654012013012800000)
85. REPLACE MASS AIR FLOW METER ASSEMBLY. Refer to «REMOVAL»(ref-524262-S00293573342013012800000)
86. REPAIR POWER SOURCE CIRCUIT. Refer to «PROCEDURE - Step 1»(ref-524264-S32204479942013012800000)
87. REPAIR POWER SOURCE CIRCUIT. Refer to «PROCEDURE - Step 1»(ref-524266-S28511242032013012800000)
88. CHECK FUEL PUMP CONTROL SYSTEM. Refer to «Fuel Pump Control Circuit»(ref-524264-S32606429692013012800000)
89. GO TO DTC CHART. Refer to «DIAGNOSTIC TROUBLE CODE CHART»(ref-524126-S26606347652013012800000)
90. CHECK GENERATOR CIRCUIT. Refer to «ON-VEHICLE INSPECTION - Step 4»(ref-524267-S28637136902013012800000)
91. REPLACE FUEL PUMP. Refer to «REMOVAL»(ref-524269-S41706281042013012800000)
92. REPLACE CAMSHAFT TIMING OIL CONTROL VALVE ASSEMBLY. Refer to «REMOVAL»(ref-524262-S07212957182013012800000)
93. REPLACE EGR VALVE ASSEMBLY. Refer to «REMOVAL»(ref-524251-S06751532262013012800000)
94. REPLACE IGNITION COIL ASSEMBLY. Refer to «REMOVAL»(ref-524262-S23907377132013012800000)