Engine Control System (Diagnostic Codes (P0340-P1605): Diagnosis Lexus ES XV40 facelift

INSPECTION PROCEDURE

HINT

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

Scheme 320

Scheme 321

1. CHECK HARNESS AND CONNECTOR (SENSOR POWER SOURCE) Disconnect the B44 or B46 VVT sensor connector. Turn the engine switch on (IG). Measure the voltage according to the value(s) in the table below. Standard voltage Tester Connection Specified Condition VC (B44-3) - Body ground 4.5 to 5.5 V VC (B46-3) - Body ground 4.5 to 5.5 V Reconnect the VVT sensor connector. NG --> See step 7 OK: Go to next step
2. CHECK HARNESS AND CONNECTOR (VVT SENSOR FOR INTAKE CAMSHAFT - ECM) Disconnect the B44 or B46 VVT sensor connector. Disconnect the B12 ECM connector. Measure the resistance according to the value(s) in the table below. Standard resistance (Check for open) Tester Connection Specified Condition VVR+ (B44-1) - VV1+ (B12-69) Below 1 ohms VVR- (B44-2) - VV1- (B12-92) Below 1 ohms VVL+ (B46-1) - VV2+ (B12-67) Below 1 ohms VVL- (B46-2) - VV2- (B12-90) Below 1 ohms Standard resistance (Check for short) Tester Connection Specified Condition VVR+ (B44-1) or VV1+ (B12-69) - Body ground 10 kohms or higher VVR- (B44-2) or VV1- (B12-92) - Body ground 10 kohms or higher VVL+ (B46-1) or VV2+ (B12-67) - Body ground 10 kohms or higher VVL- (B46-2) or VV2- (B12-90) - Body ground 10 kohms or higher Reconnect the VVT sensor connector. Reconnect the ECM connector. NG --> REPAIR OR REPLACE HARNESS OR CONNECTOR OK: Go to next step
3. CHECK SENSOR INSTALLATION (VVT SENSOR) Check the VVT sensor installation condition. OK Sensor is installed correctly. NG --> SECURELY REINSTALL VVT SENSOR OK: Go to next step
4. CHECK CAMSHAFT TIMING GEAR ASSEMBLY (TEETH OF SENSOR PLATE) Check the teeth of the sensor plate. OK Sensor plate teeth do not have any cracks or deformation. NG --> REPLACE CAMSHAFT TIMING GEAR ASSEMBLY OK: Go to next step
5. REPLACE VVT SENSOR NEXT: Go to next step
6. CHECK WHETHER DTC OUTPUT RECURS Connect Techstream to the DLC3. Turn the engine switch on (IG). Turn the Techstream on. Clear the DTCs. Refer to «DTC CHECK / CLEAR»(ref-396630-S12048003312011050900000) . Turn the engine switch off. Turn the engine switch on (IG) and turn the Techstream on. Start the engine. Idle the engine for 10 seconds or more. Select the following menu items: Powertrain / Engine / Trouble Codes / Pending. Read the pending DTCs. Result Display (DTC Output) Proceed to No output A P0340, P0342, P0343, P0345, P0347 or P0348 B HINT: If the engine does not start, replace the ECM. B --> See step 8 A --> END
7. CHECK HARNESS AND CONNECTOR (VVT SENSOR FOR INTAKE CAMSHAFT - ECM) Disconnect the VVT sensor connector. Disconnect the ECM connector. Measure the resistance according to the value(s) in the table below. Standard resistance (Check for open) Tester Connection Specified Condition VC (B44-3) - VCV1 (B12-115) Below 1 ohms VC (B46-3) - VCV2 (B12-113) Below 1 ohms Standard resistance (Check for short) Tester Connection Specified Condition VC (B44-3) or VCV1 (B12-115) - Body ground 10 kohms or higher VC (B46-3) or VCV2 (B12-113) - Body ground 10 kohms or higher Reconnect the VVT sensor connector. Reconnect the ECM connector. NG --> REPAIR OR REPLACE HARNESS OR CONNECTOR OK --> See step 8
8. REPLACE ECM. Refer to «REMOVAL»(ref-396635-S35871318042011050900000)

HINT

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

Scheme 322

1. INSPECT IGNITION COIL ASSEMBLY (POWER SOURCE) Disconnect the B26, B27, B28, B29, B30 or B31 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 Specified Condition B26-1 - Body ground 9 to 14 V B27-1 - Body ground 9 to 14 V B28-1 - Body ground 9 to 14 V B29-1 - Body ground 9 to 14 V B30-1 - Body ground 9 to 14 V B31-1 - Body ground 9 to 14 V Measure the resistance according to the value(s) in the table below. Standard resistance Tester Connection Specified Condition B26-4 - Body ground Below 1 ohms B27-4 - Body ground Below 1 ohms B28-4 - Body ground Below 1 ohms B29-4 - Body ground Below 1 ohms B30-4 - Body ground Below 1 ohms B31-4 - Body ground Below 1 ohms NG --> REPAIR OR REPLACE HARNESS OR CONNECTOR OK: Go to next step
2. CHECK HARNESS AND CONNECTOR (IGNITION COIL ASSEMBLY - ECM (IGT SIGNAL TERMINAL)) Disconnect the B26, B27, B28, B29, B30 or B31 ignition coil connector. Disconnect the ECM B12 connector. Measure the resistance according to the value(s) in the table below. Standard resistance (Check for open) Tester Connection Specified Condition IGT1 (B26-3) - IGT1 (B12-40) Below 1 ohms IGT2 (B27-3) - IGT2 (B12-39) Below 1 ohms IGT3 (B28-3) - IGT3 (B12-38) Below 1 ohms IGT4 (B29-3) - IGT4 (B12-37) Below 1 ohms IGT5 (B30-3) - IGT5 (B12-36) Below 1 ohms IGT6 (B31-3) - IGT6 (B12-35) Below 1 ohms Standard resistance (Check for short) Tester Connection Specified Condition IGT1 (B26-3) or IGT1 (B12-40) - Body ground 10 kohms or higher IGT2 (B27-3) or IGT2 (B12-39) - Body ground 10 kohms or higher IGT3 (B28-3) or IGT3 (B12-38) - Body ground 10 kohms or higher IGT4 (B29-3) or IGT4 (B12-37) - Body ground 10 kohms or higher IGT5 (B30-3) or IGT5 (B12-36) - Body ground 10 kohms or higher IGT6 (B31-3) or IGT6 (B12-35) - Body ground 10 kohms or higher Standard resistance (Check for open) Tester Connection Specified Condition IGF (B26-2) - IGF1 (B12-106) Below 1 ohms IGF (B27-2) - IGF1 (B12-106) Below 1 ohms IGF (B28-2) - IGF1 (B12-106) Below 1 ohms IGF (B29-2) - IGF1 (B12-106) Below 1 ohms IGF (B30-2) - IGF1 (B12-106) Below 1 ohms IGF (B31-2) - IGF1 (B12-106) Below 1 ohms Standard resistance (Check for short) Tester Connection Specified Condition IGF (B26-2) or IGF1 (B12-106) - Body ground 10 kohms or higher IGF (B27-2) or IGF1 (B12-106) - Body ground 10 kohms or higher IGF (B28-2) or IGF1 (B12-106)- Body ground 10 kohms or higher IGF (B29-2) or IGF1 (B12-106) - Body ground 10 kohms or higher IGF (B30-2) or IGF1 (B12-106) - Body ground 10 kohms or higher IGF (B31-2) or IGF1 (B12-106) - Body ground 10 kohms or higher NG --> REPAIR OR REPLACE HARNESS OR CONNECTOR OK: Go to next step
3. PERFORM SIMULATION TEST Clear the DTC(s). Refer to «DTC CHECK / CLEAR»(ref-396630-S12048003312011050900000) . Change the arrangement of the ignition coils (with igniters). NOTE: Do not change the location of the connectors. Perform a simulation test. Result Display (DTC Output) Proceed to Same DTCs (that have been erased) A Other DTCs B B --> REPLACE IGNITION COIL ASSEMBLY A --> See step 4
4. REPLACE ECM. Refer to «REMOVAL»(ref-396635-S35871318042011050900000)

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

Scheme 323

Scheme 324

1. CHECK HARNESS AND CONNECTOR (SENSOR POWER SOURCE) Disconnect the B43 or B45 VVT sensor connector. Turn the engine switch on (IG). Measure the voltage according to the value(s) in the table below. Standard voltage Tester Connection Specified Condition VC2 (B43-3) - Body ground 4.5 to 5.5 V VC2 (B45-3) - Body ground 4.5 to 5.5 V Reconnect the VVT sensor connector. NG --> See step 7 OK: Go to next step
2. CHECK HARNESS AND CONNECTOR (VVT SENSOR - ECM) Disconnect the B43 or B45 VVT sensor connector. Disconnect the B12 ECM connector. Measure the resistance according to the value(s) in the table below. Standard resistance (Check for open) Tester Connection Specified Condition EX+ (B43-1) - EV1+ (B12-68) Below 1 ohms EX- (B43-2) - EV1- (B12-91) Below 1 ohms EX+ (B45-1) - EV2+ (B12-66) Below 1 ohms EX- (B45-2) - EV2- (B12-89) Below 1 ohms Standard resistance (Check for short) Tester Connection Specified Condition EX+ (B43-1) or EV1+ (B12-68) - Body ground 10 kohms or higher EX- (B43-2) or EV1- (B12-91) - Body ground 10 kohms or higher EX+ (B45-1) or EV2+ (B12-66) - Body ground 10 kohms or higher EX- (B45-2) or EV2- (B12-89) - Body ground 10 kohms or higher Reconnect the VVT sensor connector. Reconnect the ECM connector. NG --> REPAIR OR REPLACE HARNESS OR CONNECTOR OK: Go to next step
3. CHECK SENSOR INSTALLATION (VVT SENSOR) Check the VVT sensor installation condition. OK Sensor is installed correctly. NG --> SECURELY REINSTALL VVT SENSOR OK: Go to next step
4. CHECK EXHAUST CAMSHAFT Check the teeth of the camshaft. OK The teeth do not have any cracks or deformation. NG --> REPLACE EXHAUST CAMSHAFT OK: Go to next step
5. REPLACE VVT SENSOR (FOR EXHAUST CAMSHAFT) Replace the VVT sensor. Refer to «REMOVAL»(ref-396635-S34495565042011050900000) . NEXT: Go to next step
6. CHECK WHETHER DTC OUTPUT RECURS Connect Techstream to the DLC3. Turn the engine switch on (IG). Turn the Techstream on. Clear the DTCs. Refer to «DTC CHECK / CLEAR»(ref-396630-S12048003312011050900000) . Turn the engine switch off. Turn the engine switch on (IG) and turn the Techstream on. Start the engine. Idle the engine for 10 seconds or more. Select the following menu items: Powertrain / Engine / Trouble Codes. Read the DTCs. Result Display (DTC Output) Proceed to No output A P0365, P0352, P0353, P0354, P0355 or P0356 B HINT: If the engine does not start, replace the ECM. B --> See step 8 A --> END
7. CHECK HARNESS AND CONNECTOR (VVT SENSOR FOR EXHAUST SIDE - ECM) Disconnect the VVT sensor 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 VC2 (B43-3) - VCE1 (B12-114) Always Below 1 ohms VC2 (B45-3) - VCE2 (B12-112) Always Below 1 ohms Standard Resistance (Check for Short) Tester Connection Condition Specified Condition VC2 (B43-3) or VCE1 (B12-114) - Body ground Always 10 kohms or higher VC2 (B45-3) or VCE2 (B12-112) - Body ground Always 10 kohms or higher Reconnect the VVT sensor connector. Reconnect the ECM connector. NG --> REPAIR OR REPLACE HARNESS OR CONNECTOR OK --> See step 8
8. REPLACE ECM. Refer to «REMOVAL»(ref-396635-S35871318042011050900000)

CONDITIONING FOR SENSOR TESTING

Perform the operation with the engine speeds and time durations described below prior to checking the waveforms of the A/F and HO2 sensors. This is performed in order to heat the sensors sufficiently to obtain the appropriate inspection results.

Scheme 325

1. Connect the Techstream to the DLC3 (Procedure "A").
2. Start the engine and warm it up with all the accessories switched off, until the engine coolant temperature stabilizes (Procedure "B").
3. Run the engine at an engine speed of between 2500 RPM and 3000 RPM for at least 3 minutes (Procedure "C").
4. While running the engine at 3000 RPM for 2 seconds and 2000 RPM for 2 seconds, check the waveforms of the A/F and HO2 sensors using the Techstream or scan tool (Procedure "D").

Note. The Air-Fuel Ratio (A/F) sensor has an output delay of a few seconds and the Heated Oxygen (HO2) sensor has a maximum output delay of approximately 20 seconds.

Case Air Fuel Ratio Sensor (Sensor 1) Output Voltage Heated Oxygen Sensor (Sensor 2) Output Voltage Main Suspected Trouble Area 1 - 2 Air fuel ratio sensor Air fuel ratio sensor heater Air fuel ratio sensor circuit 3 Heated oxygen sensor Heated oxygen sensor heater Heated oxygen sensor circuit 4 Fuel pressure Gas leakage from exhaust system (Air fuel ratio extremely lean or rich)

Scheme 326

Scheme 327

Scheme 328

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, enter the following menus on the Techstream: Powertrain / Engine / Active Test / Control the Injection Volume for A/F Sensor / AFS Voltage B1S1 or AFS Voltage B2S1 and O2S B1S2 or O2S B2S2 then press the graph button on the Data List view.

HINT

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

DTC SUMMARY

HINT

The 0.02 inch orifice is located inside the canister pump module.

Refer to the EVAP System. Refer to EVAP System .

Refer to the EVAP system. Refer to EVAP System .

HINT

The pressure sensor is built into the canister pump module.

Note. When a vehicle is brought into a workshop, leave it as it is. Do not change the vehicle condition. For example, do not tighten the fuel tank cap. Do not disassemble the canister pump module. Techstream is required to conduct the following diagnostic troubleshooting procedure.

Scheme 329

Scheme 330

1. CHECK HARNESS AND CONNECTOR (CANISTER PUMP MODULE - ECM) Disconnect the L2 canister pump module connector. Turn the engine switch on (IG). Measure the voltage and resistance according to the value(s) in the table below. Standard Tester Connection Specified Condition VCC (L2-4) - Body ground 4.5 to 5.5 V VOUT (L2-3) - Body ground 4.5 to 5.5 V SGND (L2-2) - Body ground 100 ohms or less Result Test Result Suspected Trouble Area Proceed to Voltage and resistance within standard ranges Open in pressure sensor circuit A Voltage and resistance outside standard ranges Open in wire harness/connector (ECM - pressure sensor) B Reconnect the canister pump module connector. B --> See step 3 A: Go to next step
2. REPLACE CHARCOAL CANISTER ASSEMBLY Replace the canister assembly. Refer to «REMOVAL»(ref-396640-S05144770852011050900000) . 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 pipe to the canister pump module; 2) the canister filter; and 3) the fuel tank vent hose. NEXT --> See step 5
3. CHECK HARNESS AND CONNECTOR Disconnect the L2 canister pump module connector. Disconnect the B12 ECM connector. Measure the resistance according to the value(s) in the table below. Standard resistance (Check for open) Tester Connection Specified Condition VCC (L2-4) - VCPP (B12-75) Below 1 ohms VOUT (L2-3) - PPMP (B12-77) Below 1 ohms SGND (L2-2) - EPPM (B12-76) Below 1 ohms Standard resistance (Check for short) Tester Connection Specified Condition VCC (L2-4) or VCPP (B12-75) - Body ground 10 kohms or higher VOUT (L2-3) or PPMP (B12-77) - Body ground 10 kohms or higher SGND (L2-2) or EPPM (B12-76) - Body ground 10 kohms or higher Reconnect the canister pump module connector. Reconnect the ECM connector. NG --> REPAIR OR REPLACE HARNESS OR CONNECTOR OK: Go to next step
4. REPLACE ECM Replace the ECM. Refer to «REMOVAL»(ref-396635-S35871318042011050900000) . NEXT: Go to next step
5. CHECK WHETHER DTC OUTPUT RECURS (AFTER REPAIR) Connect the Techstream to the DLC3. Turn the engine switch on (IG). Turn the Techstream on. Drive the vehicle in accordance with the driving pattern described in the Confirmation Driving Pattern. Enter the following menus: Powertrain / Engine / Trouble Codes / Pending. HINT: If no pending DTCs are displayed on the Techstream, the repair has been successfully completed. NEXT --> COMPLETED

Refer to the EVAP system. Refer to EVAP System .

HINT

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

Scheme 331

1. CHECK ANY OTHER DTCS OUTPUT (VEHICLE STABILITY CONTROL SYSTEM) Connect the Techstream to the DLC3. Turn the engine switch on (IG) and turn the Techstream on. Enter the following menus: Chassis / ABS/VSC/TRAC / Trouble Codes. Read the DTCs. Result Display (DTC output) Proceed to DTC is not output A DTC is output B B --> GO TO DTC CHART (VEHICLE STABILITY CONTROL SYSTEM) A: Go to next step
2. READ VALUE USING TECHSTREAM (VEHICLE SPEED) 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 circuit. Connect the Techstream to the DLC3. Turn the engine switch on (IG). Turn the Techstream on. Select the following menu items: Powertrain / Engine / 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. OK --> See step 5 NG: Go to next step
3. CHECK COMBINATION METER ASSEMBLY (SPD SIGNAL WAVEFORM) Inspect the combination meter using an oscilloscope. Shift the transmission gear selector lever to the neutral position. Jack up the vehicle. Turn the engine switch on (IG). Measure the voltage between the specified terminal of the combination meter and body ground while the wheel is turned slowly. Standard voltage Tester Connection Specified Condition +S (E20-12) - Body ground Voltage generated intermittently HINT: The output voltage should fluctuate up and down, similarly to the diagram, when the wheel is turned slowly. NG --> See step 6 OK: Go to next step
4. CHECK HARNESS AND CONNECTOR (COMBINATION METER ASSEMBLY - ECM) Disconnect the E20 combination meter connector. Disconnect the A10 ECM connector. Measure the resistance. Standard resistance (Check for open) Tester Connection Specified Condition +S (E20-12) - SPD (A10-8) Below 1 ohms Reconnect the combination meter connector. Reconnect the ECM connector. NG --> REPAIR OR REPLACE HARNESS OR CONNECTOR OK --> See step 7
5. CHECK INTERMITTENT PROBLEMS. Refer to «CHECK FOR INTERMITTENT PROBLEMS»(ref-396630-S16310885982011050900000)
6. GO TO SPEED SIGNAL CIRCUIT. Refer to «Speed Signal Circuit»(ref-396647-S25441360352011050900000)
7. REPLACE ECM. Refer to «REMOVAL»(ref-396635-S35871318042011050900000)

HINT

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

Scheme 332

Scheme 333

Scheme 334

1. READ VALUE USING TECHSTREAM (STP SIGNAL AND ST1 - VOLTAGE) Connect the Techstream to the DLC3. Turn the engine switch on (IG) and turn the Techstream on. Enter the following menus: Powertrain / Engine / Data List / Stop Light Switch. Check the STP signal when the brake pedal is depressed and released. OK Brake Pedal Condition Specified Condition Depressed STP signal ON Released STP signal OFF Enter the following menus: Powertrain / Engine / Data List / ST1. Check the ST1 signal when the brake pedal is depressed and released. OK Brake Pedal Condition Specified Condition Depressed ST1 signal OFF Released ST1 signal ON OK --> CHECK FOR INTERMITTENT PROBLEMS NG: Go to next step
2. INSPECT STOP LIGHT SWITCH ASSEMBLY Remove the stop light switch assembly. Measure the resistance according to the value(s) in the table below. Standard resistance Switch Position Tester Connection Specified Condition Switch pin free 1 - 2 Below 1 ohms Switch pin free 3 - 4 10 kohms or higher Switch pin pushed in 1 - 2 10 kohms or higher Switch pin pushed in 3 - 4 Below 1 ohms Reinstall the stop light switch assembly. NG --> See step 4 OK: Go to next step
3. CHECK ECM (STP, ST1 - VOLTAGE) Disconnect the A10 ECM connector. Turn the engine switch on (IG). Measure the voltage according to the value(s) in the table below. Standard voltage Tester Connection Brake Pedal Condition Specified Condition STP (A10-36) - Body ground Depressed 7.5 to 14 V STP (A10-36) - Body ground Released Below 1.5 V ST1- (A10-35) - Body ground Depressed Below 1.5 V ST1- (A10-35) - Body ground Released 7.5 to 14 V NG --> REPAIR OR REPLACE HARNESS OR CONNECTOR OK --> See step 5
4. REPLACE STOP LIGHT SWITCH ASSEMBLY. Refer to «REMOVAL»(ref-396648-S33811057752011050900000)
5. REPLACE ECM. Refer to «REMOVAL»(ref-396635-S35871318042011050900000)

HINT

1. The following condition may also cause DTC P0505 to be set: The throttle valve is not fully closed. (e.g. The accelerator pedal is slightly depressed by something such as a floor carpet overlapping the accelerator pedal.)
2. Read freeze frame data using the Techstream. The ECM records vehicle and driving condition information as freeze frame data the moment a DTC is stored. When troubleshooting, freeze frame data can be helpful in determining whether the vehicle was running or stopped, whether the engine was warmed up or not, whether the air-fuel ratio was lean or rich, as well as other data recorded at the time of a malfunction. Refer to «FREEZE FRAME DATA»(ref-396630-S23203956252011050900000) .

HINT

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

HINT

1. DTC P050B may be set when the engine shows the symptom as listed below. If necessary, check the trouble area as listed below. Symptoms Factor Trouble Area Low idle speed at engine cold. Excessive engine friction Engine oil deterioration Drive belt tension A/C compressor Generator Rough idle at 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 running or stopped, whether the engine was warmed up or not, whether the air-fuel ratio was lean or rich, as well as other data recorded at the time of a malfunction.

HINT

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

Scheme 335

1. INSPECT FUSE (EFI NO. 1) Remove the EFI No. 1 fuse from the engine room R/B. Measure the EFI No. 1 fuse resistance. Standard resistance Below 1 ohms Reinstall the EFI No. 1 fuse. NG --> REPLACE EFI NO. 1 FUSE OK: Go to next step
2. CHECK HARNESS AND CONNECTOR Check the harness and connector between the EFI No. 1 fuse and ECM. Remove the EFI No. 1 fuse from the engine room R/B. Disconnect the A10 ECM connector. Measure the resistance according to the value(s) in the table below. Standard resistance (Check for open) Tester Connection Specified Condition Engine room R/B EFI No. 1 fuse terminal 2 - BATT (A10-20) Below 1 ohms Standard resistance (Check for short) Tester Connection Specified Condition Engine room R/B EFI No. 1 fuse terminal 2 or BATT (A10-20) - Body ground 10 kohms or higher Reinstall the ECM connector. Check the harness and the connector between the EFI No. 1 fuse and battery. Disconnect the negative battery terminal. Disconnect the positive battery terminal. Measure the resistance according to the value(s) in the table below. Standard resistance (Check for open) Tester Connection Specified Condition Battery positive terminal - Engine room R/B EFI No. 1 fuse terminal 1 Below 1 ohms Standard resistance (Check for short) Tester Connection Specified Condition Battery positive terminal or Engine room R/B EFI No. 1 fuse terminal 1 - Body ground 10 kohms or higher Reconnect the positive battery terminal. Reconnect the negative battery terminal. Reinstall the EFI No. 1 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 engine switch on (IG). Turn the Techstream on. Clear the DTCs. Refer to «DTC CHECK / CLEAR»(ref-396630-S12048003312011050900000) . Turn the Techstream off. Turn the engine switch on (IG) and turn the Techstream on. Wait 5 seconds or more. Select the following menu items: Powertrain / Engine / Trouble Codes. Read the DTCs. Result Display (DTC Output) Proceed to P0560 A No output B B --> CHECK FOR INTERMITTENT PROBLEMS A --> See step 6
6. REPLACE ECM. Refer to «REMOVAL»(ref-396635-S35871318042011050900000)

HINT

1. The following troubleshooting flowchart is based on the premise that the engine is cranked normally. If the engine does not crank, proceed to the problem symptoms table. Refer to «PROBLEM SYMPTOMS TABLE»(ref-396630-S03331147362011050900000) .
2. Read freeze frame data using the Techstream. The ECM records vehicle and driving condition information as freeze frame data the moment a DTC is stored. When troubleshooting, freeze frame data can be helpful in determining whether the vehicle was running or stopped, whether the engine was warmed up or not, whether the air-fuel ratio was lean or rich, as well as other data recorded at the time of a malfunction. Refer to «FREEZE FRAME DATA»(ref-396630-S23203956252011050900000) .

Scheme 336

1. READ VALUE USING TECHSTREAM (STARTER SIGNAL) Connect the Techstream to the DLC3. Turn the engine switch on (IG) and turn the Techstream on. Enter the following menus: Powertrain / Engine / Data List / Starter Signal. Check the value displayed on the Techstream when the engine switch is turned on (IG) and the engine is started. OK Item Engine switch on (IG) Engine start Starter Signal Close Open OK --> CHECK FOR INTERMITTENT PROBLEMS NG: Go to next step
2. INSPECT PARK/NEUTRAL POSITION SWITCH ASSEMBLY Inspect the Park/Neutral Position (PNP) switch. Disconnect the B36 switch connector. Measure the resistance according to the value(s) in the table below. Standard resistance Gear Selector Lever Position Tester Connection Specified Condition P 4 - 5 Below 1 ohms N 4 - 5 Below 1 ohms Reconnect the PNP switch connector. Result Result Proceed to OK A NG B B --> See step 3 A --> See step 4
3. REPLACE PARK/NEUTRAL POSITION SWITCH (THEN CHECK CRANKING HOLDING FUNCTION CIRCUIT). Refer to «REMOVAL»(ref-396649-S20158942132011050900000)
4. CHECK CRANKING HOLDING FUNCTION CIRCUIT. Refer to «Cranking Holding Function Circuit»(ref-396633-S09391807402011050900000)

HINT

According to the Data List displayed by the Techstream, you can read the value of the switch, sensor, actuator and so on without parts removal. Reading the Data List as the first step of troubleshooting is one method to shorten labor 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. READ DATA LIST Turn the engine switch off. Connect the Techstream to the DLC3. Turn the engine switch on (IG). Turn on the Techstream. Enter the following menus: Powertrain / Engine / Data List. According to the display on the Techstream, read the "Data List". Techstream Display Measurement Item/Range Normal Condition Diagnostic Note Shift SW Status (R Range) Park/neutral position switch status: ON or OFF ON: Shift lever in R OFF: Shift lever not in R When shift lever position displayed on Techstream differs from actual position, adjustment of park/neutral position switch or shift cable may be incorrect Shift SW Status (P Range) Park/neutral position switch a status: ON or OFF ON: Shift lever in P OFF: Shift lever not in P When shift lever position displayed on Techstream differs from actual position, adjustment of park/neutral position switch or shift cable may be incorrect Shift SW Status (N Range) Park/neutral position switch status: ON or OFF ON: Shift lever in N OFF: Shift lever not in N When shift lever position displayed on Techstream differs from actual position, adjustment of park/neutral position switch or shift cable may be incorrect Shift SW Status (D Range) Park/neutral position switch status: ON or OFF ON: Shift lever in D or S OFF: Shift lever not in D or S When shift lever position displayed on Techstream differs from actual position, adjustment of park/neutral position switch or shift cable may be incorrect Sports Mode Selection SW Sport mode select switch status: ON or OFF ON: Shift lever in S, "+" or "-" OFF: Shift lever not in S, "+" and "-"

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1. CHECK HARNESS AND CONNECTOR (BATTERY - PARK/NEUTRAL POSITION SWITCH) Disconnect the park/neutral position switch connector. Turn the engine switch on (IG). Measure the voltage according to the value(s) in the table below. Standard voltage Tester Connection Specified Condition RB (B36-1) - Body ground 10 to 14 V Reconnect the park/neutral position switch. NG --> REPAIR OR REPLACE HARNESS OR CONNECTOR OK: Go to next step
2. CHECK ECM (OUTPUT SIGNAL) Turn the engine switch on (IG). Measure the voltage according to the value(s) in the table below. Standard voltage Tester Connection Specified Condition B (B36-4) - Body ground Below 3 V NG --> See step 12 OK: Go to next step
3. CHECK HARNESS AND CONNECTOR (PARK/NEUTRAL POSITION SWITCH - ST RELAY) Disconnect the B36 park/neutral position switch connector. Remove the ST relay from the engine room relay block. Measure the resistance according to the value(s) in the table below. Standard resistance (check for open) Tester Connection Specified Condition L (B36-9) - ST relay terminal 1 Below 1 ohms Standard resistance (check for open) Tester Connection Specified Condition L (B36-9) or ST relay terminal 1 - Body ground 10 kohms or higher Reinstall the ST relay. Reconnect the park/neutral position switch connector. NG --> REPAIR OR REPLACE HARNESS OR CONNECTOR OK: Go to next step
4. INSPECT ST RELAY Remove the ST relay from the engine room relay block. Measure the resistance between the terminals. Standard resistance Tester Connection Specified Condition 3 - 5 10 kohms or higher 3 - 5 Below 1 ohms Apply battery voltage between terminals 1 and 2 Reinstall the ST relay. NG --> REPLACE ST RELAY OK: Go to next step
5. CHECK HARNESS AND CONNECTOR (ST RELAY - BODY GROUND) Remove the ST relay from the engine room relay block. Measure the resistance between the terminals. Standard resistance Tester connection Specified Condition ST relay terminal 2 - Body ground Below 1 ohms NG --> REPAIR OR REPLACE HARNESS OR CONNECTOR OK: Go to next step
6. INSPECT PARK/NEUTRAL POSITION SWITCH ASSEMBLY Disconnect the B36 park/neutral position switch connector. Measure the resistance according to the value(s) in the table below when the shift lever is moved to each position. Standard resistance Shift Position Tester Connection Specified Condition P 1 - 3 and 4 - 9 Below 1 ohms Except P 10 kohms or higher R 1 - 2 Below 1 ohms Except R 10 kohms or higher N 1 - 8 and 4 - 9 Below 1 ohms Except N 10 kohms or higher D, S, "+" and "-" 1 - 7 Below 1 ohms Except D, S, "+" and "-" 10 kohms or higher Reconnect the park/neutral position switch connector. NG --> See step 14 OK: Go to next step
7. CHECK HARNESS AND CONNECTOR Disconnect the ECM connectors. Turn the engine switch on (IG), and measure the voltage according to the value(s) in the table below when the shift lever is moved to each position. Standard voltage Shift Position Tester Connection Specified Condition P P (B12-24) - Body ground 10 to 14 V Except P Below 1 V N N (B12-27) - Body ground 10 to 14 V Except N Below 1 V R R (B12-25) - Body ground 10 to 14 V * Except R Below 1 V D and S D (B12-26) - Body ground 10 to 14 V Except D and S Below 1 V HINT: * : The voltage will drop slightly due to lighting up of the back up light. Reconnect the ECM connectors. NG --> REPAIR OR REPLACE HARNESS OR CONNECTOR OK: Go to next step
8. CHECK HARNESS AND CONNECTOR Disconnect the transmission control switch connector from the shift lock control unit assembly. Turn the engine switch on (IG). Measure the voltage according to the value(s) in the table below. Standard voltage Tester Connection Specified Condition IG (E84-3) - Body ground 10 to 14 V Reconnect the transmission control switch connector. NG --> REPAIR OR REPLACE HARNESS OR CONNECTOR OK: Go to next step
9. INSPECT TRANSMISSION CONTROL SWITCH Disconnect the E84 transmission control switch connector. Measure the resistance according to the value(s) in the table below when the shift lever is moved to each position. Standard resistance Shift Position Tester Connection Specified Condition S, "+" and "-" 3 - 7 Below 1 ohms Except S, "+" and "-" 10 kohms or higher Reconnect the transmission control switch. NG --> REPLACE TRANSMISSION CONTROL SWITCH OK: Go to next step
10. CHECK HARNESS AND CONNECTOR Disconnect the ECM connector. Turn the engine switch on (IG), and measure the voltage according to the value(s) in the table below when the shift lever is moved to each position. Standard voltage Shift Position Tester Connection Specified Condition S, "+" and "-" S (A10-25) - Body ground 10 to 14 V Except S, "+" and "-" Below 1 V Reconnect the ECM connector. NG --> REPAIR OR REPLACE HARNESS OR CONNECTOR OK --> See step 11
11. REPLACE ECM. Refer to «REMOVAL»(ref-396635-S35871318042011050900000)
12. CHECK HARNESS AND CONNECTOR (PARK/NEUTRAL POSITION SWITCH - ECM) Turn the engine switch off. Disconnect the park/neutral position switch connector. Disconnect the B12 ECM connector. Measure the resistance according to the value(s) in the table below. Standard resistance (Check for open) Tester Connection Specified Condition B (B36-4) - NSW (B12-62) Below 1 ohms Standard resistance (Check for short) Tester Connection Specified Condition B (B36-4) or NSW (B12-62) - Body ground 10 kohms or higher Reconnect the connectors. NG --> REPAIR OR REPLACE HARNESS OR CONNECTOR OK --> See step 13
13. REPLACE ECM. Refer to «REMOVAL»(ref-396635-S35871318042011050900000)
14. REPLACE PARK/NEUTRAL POSITION SWITCH ASSEMBLY. Refer to «REMOVAL»(ref-396649-S20158942132011050900000)

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-396630-S23203956252011050900000) .
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, the 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 P 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 345

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, or the ignition timing may have been incorrect.

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 346

1

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.

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, or the ignition timing may have been incorrect.

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.

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1. CHECK ANY OTHER DTCS OUTPUT (IN ADDITION TO DTC P1603 OR P1605) Connect the Techstream to the DLC3. Turn the engine switch on (IG). Turn the Techstream on. Enter the following menus: Powertrain / Engine / Trouble Codes. Read the DTCs. Result Result Proceed to Only DTC P1603 and/or P1605 are output A DTCs other than P1603 and P1605 are output B B --> See step 60 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-396630-S23203956252011050900000) . 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 have been caused by an electrical malfunction in the shared wiring of all or multiple cylinders, an increase in load from external parts, etc. The engine speed is considered to have decreased rapidly if either of the following conditions apply. 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 9.3 mph (15 km/h) 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. E --> See step 50 D --> See step 43 C --> See step 35 B --> See step 25 A: Go to next step
3. CHECK INTAKE SYSTEM Check for air suction in the intake system [vacuum hose disconnection, cracks, gaskets, etc.]. 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 suction. 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-396630-S12048003312011050900000) . NG --> See step 61 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-396630-S23203956252011050900000) . Result Freeze Frame Data Item for DTC P1605 Result Suspected Area Proceed to Stop Light Switch At least 1 of the 5 sets of freeze frame data is ON Air suction from brake booster A All 5 sets of freeze frame data are OFF - B B --> See step 7 A: Go to next step
6. READ VALUE USING TECHSTREAM (SHORT FT #1 OR SHORT FT #2) 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. Turn the Techstream on. Enter the following menus: Powertrain / Engine / Data List / Short FT #1 or Short FT #2. Standard Short FT #1 or Short FT #2 changes by +10% or less. HINT: Even if the results are normal, the brake booster may have been malfunctioning. Continue this inspection procedure until step 24, and if there are no problems with other parts, replace the brake booster (refer to step 57). When air suction is present, the feedback compensation increases because the air-fuel ratio becomes lean. It is also possible to perform the airtightness inspection to check the brake booster. Refer to «ON-VEHICLE INSPECTION»(ref-396627-S39386363532011050900000) . NG --> See step 62 OK: Go to next step
7. 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-396630-S23203956252011050900000) . 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 A AFS Voltage B1S1 and AFS Voltage B2S1 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 P 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. C --> See step 12 B --> See step 9 A: Go to next step
8. CHECK MASS AIR FLOW METER Remove the mass air flow meter. Check for foreign matter in the air flow 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 24, and if there are no problems with other parts, replace the mass air flow meter (refer to step 57). B --> See step 12 A --> See step 63
9. 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. Turn the Techstream on. Enter the following menus: Powertrain / Engine / Active Test / Control the Injection Volume for A/F Sensor. 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 for A/F Sensor (25%) Air fuel ratio sensor output voltage is below 3.1 V Control the Injection Volume for A/F Sensor (-12.5%) Air fuel ratio sensor output voltage is higher than 3.4 V Result Result Proceed to NG A OK 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 24, and if there are no problems with other parts, replace the air fuel ratio sensor (refer to step 57). B --> See step 12 A: Go to next step
10. CHECK HARNESS AND CONNECTOR (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 +B (B3-2) - Body ground Engine switch on (IG) 11 to 14 V +B (B4-2) - Body ground Engine switch on (IG) 11 to 14 V 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. Reconnect the air fuel ratio sensor connector. NG --> See step 64 OK: Go to next step
11. 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 (Check for Open) Tester Connection Condition Specified Condition HT (B3-1) - HA1A (B12-86) Always Below 1 ohms AF+ (B3-3) - A1A+ (B12-93) Always Below 1 ohms AF- (B3-4) - A1A- (B12-116) Always Below 1 ohms HT (B4-1) - HA2A (B12-109) Always Below 1 ohms AF+ (B4-3) - A2A+ (B12-120) Always Below 1 ohms AF- (B4-4) - A2A- (B12-119) Always Below 1 ohms Standard Resistance (Check for Short) Tester Connection Condition Specified Condition HT (B3-1) or HA1A (B12-86) - Body ground Always 10 kohms or higher AF+ (B3-3) or A1A+ (B12-93) - Body ground Always 10 kohms or higher AF- (B3-4) or A1A- (B12-116) - Body ground Always 10 kohms or higher HT (B4-1) or HA2A (B12-109) - Body ground Always 10 kohms or higher AF+ (B4-3) or A2A+ (B12-120) - Body ground Always 10 kohms or higher AF- (B4-4) or A2A- (B12-119) - Body ground Always 10 kohms or higher 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. Make sure there is not an excessive amount of force applied to the wire harness. Reconnect the ECM connector. Reconnect the air fuel ratio sensor connector. B --> See step 65 A --> REPAIR OR REPLACE HARNESS OR CONNECTOR
12. 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-396630-S23203956252011050900000) . 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 below 10 °C (18 °F)*1 A Difference in temperature between each item is 10 °C (18 °F) 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 15 A: Go to next step
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-396630-S23203956252011050900000) . 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. C --> See step 17 B --> See step 16 A: Go to next step
14. INSPECT THERMOSTAT HINT: For the thermostat inspection, refer to the following procedures. Refer to «INSPECTION»(ref-396642-S21327593692011050900000) . Result Result Proceed to NG A OK B HINT: This step is not directly related to engine stall. B --> See step 16 A --> See step 66
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-396630-S23203956252011050900000) . Result Freeze Frame Data Item for DTC P1605 Result Suspected Area Proceed to Coolant Temp 120 °C (248 °F) or more Engine coolant temperature sensor A Coolant Temp, Ambient Temperature Engine coolant temperature is lower than outside temperature by 15 °C (27 °F) or more Engine coolant temperature sensor Both freeze frame data items listed above Values are other than above - B B --> See step 17 A: Go to next step
16. INSPECT ENGINE COOLANT TEMPERATURE SENSOR HINT: For the engine coolant temperature sensor inspection, refer to the following procedures. Refer to «INSPECTION»(ref-396635-S12068061292011050900000) . Result Result Proceed to NG A OK B HINT: Even if the results are normal, the engine coolant temperature sensor may have been malfunctioning. Continue this inspection procedure until step 24, and if there are no problems with other parts, replace the engine coolant temperature sensor (refer to step 57). B --> See step 17 A --> See step 67
17. 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-396630-S23203956252011050900000) . 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 22 A: Go to next step
18. 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. Turn the Techstream on. Enter the following menus: Powertrain / Engine / Active Test / Activate the VSV for EVAP Control. When the purge VSV is operated using the Techstream, check whether the part of the purge VSV applies suction to your finger. Standard Techstream Operation Specified Condition ON Purge VSV port applies suction to finger OFF Purge VSV port applies no suction to finger 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. Even if the results are normal, the purge VSV may have been malfunctioning. Continue this inspection procedure until step 24, and if there are no problems with other parts, replace the purge VSV (refer to step 57). B --> See step 22 A: Go to next step
19. INSPECT PURGE VSV Disconnect the purge VSV connector. Measure the resistance according to the value(s) in the table below. Standard Resistance Tester Connection Condition Specified Condition 1 - 2 20 °C (68 °F) 23 to 26 ohms Reconnect the purge VSV connector. NG --> See step 68 OK: Go to next step
20. CHECK HARNESS AND CONNECTOR (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 B42-1 - Body ground Engine switch on (IG) 11 to 14 V 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. Reconnect the purge VSV connector. NG --> REPAIR OR REPLACE HARNESS OR CONNECTOR (PURGE VSV - EFI RELAY) OK: Go to next step
21. 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 (Check for Open) Tester Connection Condition Specified Condition B42-2 - PRG (B12-108) Always Below 1 ohms Standard Resistance (Check for Short) Tester Connection Condition Specified Condition B42-2 or PRG (B12-108) - 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. Reconnect the ECM connector. Reconnect the purge VSV connector. NG --> REPAIR OR REPLACE HARNESS OR CONNECTOR OK --> See step 69
22. PERFORM ACTIVE TEST USING TECHSTREAM (CONTROL THE FUEL PUMP / SPEED) Connect the Techstream to the DLC3. Turn the engine switch on (IG). Turn the Techstream on. Enter the following menus: Powertrain / Engine / Active Test / Control the Fuel Pump / Speed. Check whether the fuel pump operating sound occurs when performing the Active Test on the Techstream. Standard Techstream Operation Specified Condition ON Operating sound heard OFF Operating sound not heard 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. 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 23. B --> See step 24 A: Go to next step
23. INSPECT FUEL PUMP Disconnect the fuel pump connector. Measure the resistance according to the value(s) in the table below. Standard Resistance Tester Connection Condition Reference Value 4 - 5 20 °C (68 °F) 0.2 to 3.0 ohms Reconnect the fuel pump (for low pressure) connector. NG --> See step 70 OK --> See step 71
24. CHECK FUEL SYSTEM Check for foreign matter such as iron particles around the fuel pump (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
25. 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-396630-S23203956252011050900000) . 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 A AFS Voltage B1S1 and AFS Voltage B2S1 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 P 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. C --> See step 30 B --> See step 27 A: Go to next step
26. CHECK MASS AIR FLOW METER Remove the mass air flow meter. Check for foreign matter in the air flow 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 34, and if there are no problems with other parts, replace the mass air flow meter (refer to step 57). B --> See step 30 A --> See step 63
27. PERFORM ACTIVE TEST USING TECHSTREAM (CONTROL THE INJECTION VOLUME FOR A/F SENSOR) 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. Turn the Techstream on. Enter the following menus: Powertrain / Engine / Active Test / Control the Injection Volume for A/F Sensor. 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 for A/F Sensor (25%) Air fuel ratio sensor output voltage is below 3.1 V Control the Injection Volume for A/F Sensor (-12.5%) Air fuel ratio sensor output voltage is higher than 3.4 V Result Result Proceed to NG A OK 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 34, and if there are no problems with other parts, replace the air fuel ratio sensor (refer to step 57). B --> See step 30 A: Go to next step
28. CHECK HARNESS AND CONNECTOR (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 +B (B3-2) - Body ground Engine switch on (IG) 11 to 14 V +B (B4-2) - Body ground Engine switch on (IG) 11 to 14 V 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. Reconnect the air fuel ratio sensor connector. NG --> See step 64 OK: Go to next step
29. 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 (Check for Open) Tester Connection Condition Specified Condition HT (B3-1) - HA1A (B12-86) Always Below 1 ohms AF+ (B3-3) - A1A+ (B12-93) Always Below 1 ohms AF- (B3-4) - A1A- (B12-116) Always Below 1 ohms HT (B4-1) - HA2A (B12-109) Always Below 1 ohms AF+ (B4-3) - A2A+ (B12-120) Always Below 1 ohms AF- (B4-4) - A2A- (B12-119) Always Below 1 ohms Standard Resistance (Check for Short) Tester Connection Condition Specified Condition HT (B3-1) or HA1A (B12-86) - Body ground Always 10 kohms or higher AF+ (B3-3) or A1A+ (B12-93) - Body ground Always 10 kohms or higher AF- (B3-4) or A1A- (B12-116) - Body ground Always 10 kohms or higher HT (B4-1) or HA2A (B12-109) - Body ground Always 10 kohms or higher AF+ (B4-3) or A2A+ (B12-120) - Body ground Always 10 kohms or higher AF- (B4-4) or A2A- (B12-119) - 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. Reconnect the ECM connector. Reconnect the air fuel ratio sensor connector. NG --> REPAIR OR REPLACE HARNESS OR CONNECTOR OK --> See step 65
30. 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-396630-S23203956252011050900000) . 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 below 10 °C (18 °F)*1 A Difference in temperature between each item is 10 °C (18 °F) 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 33 A: Go to next step
31. READ FREEZE FRAME DATA Connect the Techstream to the DLC3. Turn the engine switch on (IG). Using the Techstream, confirm the vehicle conditions 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 B Range C - C HINT: This step is not directly related to engine stall. C --> See step 58 B --> See step 34 A: Go to next step
32. INSPECT THERMOSTAT HINT: For the thermostat inspection, refer to the following procedures. Refer to «INSPECTION»(ref-396642-S21327593692011050900000) . Result Result Proceed to NG A OK B HINT: This step is not directly related to engine stall. B --> See step 34 A --> See step 66
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-396630-S23203956252011050900000) . Result Freeze Frame Data Item for DTC P1605 Result Suspected Area Proceed to Coolant Temp 120 °C (248 °F) or higher Engine coolant temperature sensor A Coolant Temp, Ambient Temperature Engine coolant temperature is lower than outside temperature by 15 °C (27 °F) 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
34. INSPECT ENGINE COOLANT TEMPERATURE SENSOR HINT: For the engine coolant temperature sensor inspection, refer to the following procedures. Refer to «INSPECTION»(ref-396635-S12068061292011050900000) . Result Result Proceed to NG A OK 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 67
35. 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-396630-S23203956252011050900000) . 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 P 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 learning 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 learning amount is increased to maintain the idling speed. If this situation continues, the ISC learning amount reaches the upper limit, the idling speed cannot be maintained causing idling to become unstable, and the engine may stall. C --> See step 38 B --> See step 37 A: Go to next step
36. CHECK THROTTLE BODY ASSEMBLY Check for foreign matter and signs that the throttle body assembly was stuck, and also check that the valve and shaft move smoothly during operation. Result Result Proceed to NG A OK B HINT: Even if the results are normal, the throttle body assembly 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 38 A --> See step 72
37. CHECK THROTTLE BODY ASSEMBLY Check if carbon is in the air flow 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 assembly 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 38 A --> See step 72
38. PERFORM ACTIVE TEST USING TECHSTREAM (CONTROL THE VVT SYSTEM) Connect the Techstream to the DLC3. Turn the engine switch on (IG). Turn the Techstream on. Warm up the engine. Enter the following menus: Powertrain / Engine / 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 P or N. Check the engine speed while operating the Oil Control Valve (OCV) using the Techstream. OK Techstream Operation Specified Condition OFF Normal engine speed ON Soon after OCV switched from OFF to ON, 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 --> REPLACE CAMSHAFT TIMING OIL CONTROL VALVE ASSEMBLY OK: Go to next step
39. PERFORM ACTIVE TEST USING TECHSTREAM (CONTROL THE VVT EXHAUST LINEAR) Connect the Techstream to the DLC3. Turn the engine switch on (IG). Turn the Techstream on. Start the engine and warm it up. Enter the following menus: Powertrain / Engine / Active Test / Control the VVT Exhaust Linear (Bank 1) or Control the VVT Exhaust Linear (Bank 2). 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 73 OK: Go to next step
40. 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-396630-S23203956252011050900000) . 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 Below 3° Engine coolant temperature sensor Mass air flow meter 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 P or N) and compare these data with the freeze frame data. Even if the results are normal, the knock control sensors may have been malfunctioning. If there are no problems with other parts, replace the knock control sensors (refer to step 57). B --> See step 57 A: Go to next step
41. INSPECT ENGINE COOLANT TEMPERATURE SENSOR HINT: For the engine coolant temperature inspection, refer to the following procedures. Refer to «INSPECTION»(ref-396635-S12068061292011050900000) . NG --> See step 67 OK: Go to next step
42. INSPECT MASS AIR FLOW METER Inspect the mass air flow meter. Refer to «ON-VEHICLE INSPECTION»(ref-396635-S31956441732011050900000) . HINT: If the intake air temperature sent to the ECM is higher than the standard due to the mass air flow meter (intake air temperature sensor) malfunctioning, the ignition timing may become delayed. NG --> See step 63 OK --> See step 74
43. CHECK HARNESS AND CONNECTOR (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 Tester Connection Switch Condition Specified Condition B16-2 - Body ground Engine switch on (IG) 11 to 14 V B17-2 - Body ground Engine switch on (IG) 11 to 14 V B18-2 - Body ground Engine switch on (IG) 11 to 14 V B19-2 - Body ground Engine switch on (IG) 11 to 14 V B20-2 - Body ground Engine switch on (IG) 11 to 14 V B21-2 - Body ground Engine switch on (IG) 11 to 14 V 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.) Reconnect the fuel injector connector. NG --> REPAIR OR REPLACE HARNESS OR CONNECTOR (FUEL INJECTOR - IG2 RELAY) OK: Go to next step
44. CHECK HARNESS AND CONNECTOR (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 +B (B26-1) - GND (B26-4) Engine switch on (IG) 11 to 14 V +B (B27-1) - GND (B27-4) Engine switch on (IG) 11 to 14 V +B (B28-1) - GND (B28-4) Engine switch on (IG) 11 to 14 V +B (B29-1) - GND (B29-4) Engine switch on (IG) 11 to 14 V +B (B30-1) - GND (B30-4) Engine switch on (IG) 11 to 14 V +B (B31-1) - GND (B31-4) Engine switch on (IG) 11 to 14 V 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.) Reconnect the ignition coil connector. NG --> REPAIR OR REPLACE HARNESS OR CONNECTOR (IGNITION COIL - IG2 RELAY) OK: Go to next step
45. 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-396630-S23203956252011050900000) . RESULT Freeze Frame Data Item for DTC P1605 Result Suspected Area Proceed to Idle Spark Advn Ctrl (#1 to #6) 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. READ FREEZE FRAME DATA Change the location of the ignition coil for the cylinder whose Idle Spark Advn Ctrl (#1 to #6) was 4° or more in step 45. Connect the Techstream to the DLC3. Turn the engine switch on (IG). Turn the Techstream on. Enter the following menus: Powertrain / Engine / Data List / Idle Spark Advn Ctrl (#1 to #6). 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. B --> See step 75 A: Go to next step
47. 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-396630-S23203956252011050900000) . Result Freeze Frame Data Item for DTC P1605 Suspected Area Proceed to A/C Signal Air Conditioner FB Val PS Feedback Val A/C Signal display does not change from OFF* - Value is 0 L/s - A Value is shown Power steering system A/C Signal display changes from OFF to ON* Value is 0 L/s Value is shown Value is 0 L/s - Value is shown - A/C system B *: Check not only the ON / OFF state of the air conditioner but also the change in air conditioner load. 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 P or N) and compare these data with the freeze frame data. The normal value for the ISC learning amount 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). B --> CHECK AIR CONDITIONING SYSTEM A: Go to next step
48. 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-396630-S23203956252011050900000) . Result Freeze Frame Data Item for DTC P1605 Suspected Area Proceed to Electrical Load Signal 1 Electric Load Feedback Val Difference between Engine Speed and Turbine Speed Vehicle Speed Electrical Load Signal display changes from OFF to ON*, or Value displayed for Electric Load Feedback Val increases* 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 below 100 RPM Below 9 mph (15 km/h) A/T system B 9 mph (15 km/h) 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 below 100 RPM Below 9 mph (15 km/h) A/T system B 9 mph (15 km/h) or more - C All 5 sets of freeze frame data are 100 RPM or more - - C *: 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. HINT: The normal value for the ISC learning amount is engine displacement (liters) x 0.9. Even if the results are normal, the electrical load signal system and/or the 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 the A/T system (refer to step 57). C --> See step 49 B --> CHECK AUTOMATIC TRANSMISSION SYSTEM A --> See step 76
49. 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-396630-S23203956252011050900000) . Result Freeze Frame Data Item for DTC P1605 Suspected Area Proceed to Shift SW Status (P Range) or Shift SW Status (N Range) Neutral Position SW Signal Shift SW Status (P Range) and Shift SW Status (N Range) are both OFF in at least one data set In D or R, Neutral Position SW Signal is ON Park/neutral position switch A In D or R, Neutral Position SW Signal 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). C --> See step 59 B --> CHECK AUTOMATIC TRANSMISSION SYSTEM A --> CHECK PARK/NEUTRAL POSITION SWITCH
50. 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-396630-S23203956252011050900000) . Result Freeze Frame Data Item for DTC P1605 Result Suspected Area Proceed to Throttle Sensor Position, Calculate Load Calculate Load decreases while Throttle Sensor Position increases Mass air flow meter 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 Remove the mass air flow meter. Check for foreign matter in the air flow 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 (refer to step 57). B --> See step 52 A --> See step 63
52. CHECK HARNESS AND CONNECTOR (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 Tester Connection Switch Condition Specified Condition B16-2 - Body ground Engine switch on (IG) 11 to 14 V B17-2 - Body ground Engine switch on (IG) 11 to 14 V B18-2 - Body ground Engine switch on (IG) 11 to 14 V B19-2 - Body ground Engine switch on (IG) 11 to 14 V B20-2 - Body ground Engine switch on (IG) 11 to 14 V B21-2 - Body ground Engine switch on (IG) 11 to 14 V 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.) Reconnect the fuel injector connector. NG --> REPAIR OR REPLACE HARNESS OR CONNECTOR (FUEL INJECTOR - IG2 RELAY) OK: Go to next step
53. CHECK HARNESS AND CONNECTOR (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 +B (B26-1) - GND (B26-4) Engine switch on (IG) 11 to 14 V +B (B27-1) - GND (B27-4) Engine switch on (IG) 11 to 14 V +B (B28-1) - GND (B28-4) Engine switch on (IG) 11 to 14 V +B (B29-1) - GND (B29-4) Engine switch on (IG) 11 to 14 V +B (B30-1) - GND (B30-4) Engine switch on (IG) 11 to 14 V +B (B31-1) - GND (B31-4) Engine switch on (IG) 11 to 14 V 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.) Reconnect the ignition coil connector. NG --> REPAIR OR REPLACE HARNESS OR CONNECTOR (IGNITION COIL - IG2 RELAY) 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). Turn the Techstream on. Enter the following menus: Powertrain / Engine / Active Test / Control the Fuel Pump / Speed. Check whether the fuel pump operating sound occurs when performing the Active Test on the Techstream. Specified Condition Techstream Operation Specified Condition ON Operating sound heard OFF Operating sound not heard 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. 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 Disconnect the fuel pump connector. Measure the resistance according to the value(s) in the table below. Standard Resistance Tester Connection Condition Reference Value 4 - 5 20 °C (68 °F) 0.2 to 3.0 ohms Reconnect the fuel pump (for low pressure) connector. NG --> See step 70 OK --> See step 77
56. CHECK FUEL SYSTEM Check for foreign matter such as iron particles around the fuel pump (fuel pump, fuel pump filter, 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 (FOR LOW PRESSURE)
57. REPLACE MALFUNCTIONING PARTS If the malfunction could not be identified in steps 3 to 24, replace the part which is suspected to be malfunctioning according to the step where an inspection was performed. Performed Step Inspection or Part to Replace Step 6 Brake booster replacement Step 8 Mass air flow meter replacement Step 9 Air fuel ratio sensor replacement Step 16 Engine coolant temperature sensor replacement Step 18 Purge VSV replacement Step 24 Fuel pump replacement If the malfunction could not be identified in steps 25 to 34, replace the part which is suspected to be malfunctioning according to the step where an inspection was performed. Performed Step Inspection or Part to Replace Step 26 Mass air flow meter replacement Step 27 Air fuel ratio sensor replacement Step 34 Engine coolant temperature sensor replacement If the malfunction could not be identified in steps 35 to 42, replace the part which is suspected to be malfunctioning according to the step where an inspection was performed. Performed Step Inspection or Part to Replace Step 36, 37 Throttle body assembly replacement Step 40 Knock sensor replacement 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 or Part to Replace 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 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 Inspection or Part to Replace Step 51 Mass air flow meter replacement 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). Turn the Techstream on. Clear the DTCs. Refer to «DTC CHECK / CLEAR»(ref-396630-S12048003312011050900000) . 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, COMPONENT AND AREA OK --> END
60. GO TO DTC CHART. Refer to «DIAGNOSTIC TROUBLE CODE CHART»(ref-396630-S19862863392011050900000)
61. INSPECT PURGE VSV. Refer to «INSPECTION»(ref-396640-S06736081682011050900000)
62. REPLACE BRAKE BOOSTER. Refer to «REMOVAL»(ref-396627-S14233318022011050900000)
63. REPLACE MASS AIR FLOW METER. Refer to «REMOVAL»(ref-396635-S17842337612011050900000)
64. CHECK AIR FUEL RATIO SENSOR POWER SOURCE CIRCUIT. Refer to «PROCEDURE - Step 2»(ref-396637-S24732566802011050900000)
65. REPLACE AIR FUEL RATIO SENSOR. Refer to «REMOVAL»(ref-396640-S01703233552011050900000)
66. REPLACE THERMOSTAT. Refer to «REMOVAL»(ref-396642-S29806719702011050900000)
67. REPLACE ENGINE COOLANT TEMPERATURE SENSOR. Refer to «REMOVAL»(ref-396635-S33992661182011050900000)
68. REPLACE PURGE VSV. Refer to «REMOVAL»(ref-396640-S05591222912011050900000)
69. REPLACE ECM. Refer to «REMOVAL»(ref-396635-S35871318042011050900000)
70. REPLACE FUEL PUMP. Refer to «REMOVAL»(ref-396644-S29992404232011050900000)
71. CHECK FUEL PUMP CONTROL SYSTEM. Refer to «Fuel Pump Control Circuit»(ref-396633-S09651471912011050900000)
72. REPLACE THROTTLE BODY ASSEMBLY. Refer to «REMOVAL»(ref-396635-S26235626152011050900000)
73. REPLACE CAMSHAFT TIMING OIL CONTROL VALVE ASSEMBLY. Refer to «REMOVAL»(ref-396635-S02868099382011050900000)
74. REPLACE KNOCK SENSOR. Refer to «REMOVAL»(ref-396635-S37480613902011050900000)
75. REPLACE IGNITION COIL. Refer to «REMOVAL»(ref-396645-S17756687572011050900000)
76. CHECK GENERATOR CIRCUIT. Refer to «ON-VEHICLE INSPECTION»(ref-396650-S40681015772011050900000)
77. CHECK FUEL PUMP CONTROL SYSTEM. Refer to «Fuel Pump Control Circuit»(ref-396633-S09651471912011050900000)