Engine Control (Diagnostic Codes (P0340-P0606): Diagnosis Lexus RX III

INSPECTION PROCEDURE

HINT

1. Read freeze frame data using the Techstream. The ECM records vehicle and driving condition information as freeze frame data the moment a DTC is stored. When troubleshooting, freeze frame data can help determine if the vehicle was moving or stationary, if the engine was warmed up or not, if the air fuel ratio was lean or rich, and other data from the time the malfunction occurred.
2. If no problem is found by this diagnostic troubleshooting procedure, troubleshoot the engine mechanical system.

Scheme 284

Scheme 285

Scheme 286

Scheme 287

1. CHECK VVT SENSOR FOR INTAKE SIDE (SENSOR POWER SOURCE) Disconnect the 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 Switch Condition Specified Condition D22-3 (VC) - Body ground Engine switch on (IG) 4.5 to 5.5 V D23-3 (VC) - Body ground Engine switch on (IG) 4.5 to 5.5 V TEXT IN ILLUSTRATION *1 Front view of wire harness connector (to VVT Sensor for Intake Side) *2 Bank 1 *3 Bank 2 Reconnect the VVT sensor connector. NG --> See step 7 OK: Go to next step
2. CHECK HARNESS AND CONNECTOR (VVT SENSOR FOR INTAKE 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 D22-1 (VVR+) - D1-90 (VV1+) Always Below 1 ohms D22-2 (VVR-) - D1-89 (VV1-) Always Below 1 ohms D23-1 (VVL+) - D1-87 (VV2+) Always Below 1 ohms D23-2 (VVL-) - D1-88 (VV2-) Always Below 1 ohms Standard Resistance (Check for Short) Tester Connection Condition Specified Condition D22-1 (VVR+) or D1-90 (VV1+) - Body ground Always 10 kohms or higher D22-2 (VVR-) or D1-89 (VV1-) - Body ground Always 10 kohms or higher D23-1 (VVL+) or D1-87 (VV2+) - Body ground Always 10 kohms or higher D23-2 (VVL-) or D1-88 (VV2-) - Body ground Always 10 kohms or higher TEXT IN ILLUSTRATION *1 Front view of wire harness connector (to VVT Sensor for Intake Side) *2 Front view of wire harness connector (to ECM) *3 Bank 1 *4 Bank 2 Reconnect the VVT sensor connector. Reconnect the ECM connector. NG --> REPAIR OR REPLACE HARNESS OR CONNECTOR (VVT SENSOR FOR INTAKE SIDE - ECM) OK: Go to next step
3. CHECK SENSOR INSTALLATION (VVT SENSOR FOR INTAKE SIDE) Check the VVT sensor installation. OK Sensor is installed correctly. NG --> See step 8 OK: Go to next step
4. CHECK CAMSHAFT TIMING GEAR ASSEMBLY (TEETH OF PLATE) Check the teeth of the signal plate. OK Sensor plate teeth do not have any cracks or deformation. NG --> See step 9 OK: Go to next step
5. REPLACE VVT SENSOR FOR INTAKE SIDE Replace the VVT sensor. Refer to «REMOVAL»(ref-400788-S07691691552011051800000) . NEXT: Go to next step
6. CHECK WHETHER DTC OUTPUT RECURS (DTC P0340, P0342, P0343, P0345, P0347 AND/OR P0348) 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-400784-S05337578742011051800000) . Turn the engine switch off. 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 the Confirmation Driving Pattern. Enter the following menus: Powertrain / Engine / Utility / All Readiness. Input the P0340, P0342, P0343, P0345, P0347, or P0348. Check the DTC judgment result. Result Result Proceed to NORMAL (DTC is not output) A ABNORMAL (DTC P0340, P0342, P0343, P0345, P0347, or P0348 is output) B HINT: If the engine does not start, replace the ECM. B --> See step 10 A --> END
7. CHECK HARNESS AND CONNECTOR (VVT SENSOR FOR INTAKE 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 D22-3 (VC) - D1-67 (VCV1) Always Below 1 ohms D23-3 (VC) - D1-66 (VCV2) Always Below 1 ohms Standard Resistance (Check for Short) Tester Connection Condition Specified Condition D22-3 (VC) or D1-67 (VCV1) - Body ground Always 10 kohms or higher D23-3 (VC) or D1-66 (VCV2) - Body ground Always 10 kohms or higher TEXT IN ILLUSTRATION *1 Front view of wire harness connector (to VVT Sensor for Intake Side) *2 Front view of wire harness connector (to ECM) *3 Bank 1 *4 Bank 2 Reconnect the VVT sensor connector. Reconnect the ECM connector. NG --> REPAIR OR REPLACE HARNESS OR CONNECTOR (VVT SENSOR FOR INTAKE SIDE - ECM) OK --> See step 10
8. SECURELY REINSTALL VVT SENSOR FOR INTAKE SIDE. Refer to «REMOVAL»(ref-400788-S07691691552011051800000)
9. REPLACE CAMSHAFT TIMING GEAR ASSEMBLY. Refer to «REMOVAL»(ref-400790-S30220941282011051800000)
10. REPLACE ECM. Refer to «REMOVAL»(ref-400788-S26250166532011051800000)

HINT

1. Read freeze frame data using the Techstream. The ECM records vehicle and driving condition information as freeze frame data the moment a DTC is stored. When troubleshooting, freeze frame data can help determine if the vehicle was moving or stationary, if the engine was warmed up or not, if the air fuel ratio was lean or rich, and other data from the time the malfunction occurred.
2. If no problem is found by this diagnostic troubleshooting procedure, troubleshoot the engine mechanical 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 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 288

Scheme 289

Scheme 290

1. READ OUTPUT DTC 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 One of DTCs P0351, P0352, P0353, P0354, P0355, P0356 is output. A Some of DTCs P0351, P0352, P0353, P0354, P0355, P0356 are output. B B --> See step 5 A: Go to next step
2. PERFORM SIMULATION TEST Clear the DTCs. Refer to «DTC CHECK / CLEAR»(ref-400784-S05337578742011051800000) . Change the arrangement of the ignition coil assemblies. NOTE: Do not change the location of the connectors. Perform a simulation test. Result Result Proceed to Same DTCs are output (same as DTCs that were cleared) A Other DTCs are output B B --> See step 6 A: Go to next step
3. INSPECT IGNITION COIL ASSEMBLY (POWER SOURCE) Disconnect the ignition coil assembly connectors. 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 D29-1 (+B) - D29-4 (GND) Engine switch on (IG) 11 to 14 V D30-1 (+B) - D30-4 (GND) Engine switch on (IG) 11 to 14 V D31-1 (+B) - D31-4 (GND) Engine switch on (IG) 11 to 14 V D32-1 (+B) - D32-4 (GND) Engine switch on (IG) 11 to 14 V D33-1 (+B) - D33-4 (GND) Engine switch on (IG) 11 to 14 V D34-1 (+B) - D34-4 (GND) Engine switch on (IG) 11 to 14 V TEXT IN ILLUSTRATION *1 Front view of wire harness connector (to Ignition Coil Assembly) Reconnect the ignition coil assembly connectors. NG --> See step 5 OK: Go to next step
4. CHECK HARNESS AND CONNECTOR (IGNITION COIL ASSEMBLY - ECM) Disconnect the ignition coil assembly connectors. 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 D29-3 (IGT1) - D1-40 (IGT1) Always Below 1 ohms D30-3 (IGT2) - D1-39 (IGT2) Always Below 1 ohms D31-3 (IGT3) - D1-38 (IGT3) Always Below 1 ohms D32-3 (IGT4) - D1-37 (IGT4) Always Below 1 ohms D33-3 (IGT5) - D1-36 (IGT5) Always Below 1 ohms D34-3 (IGT6) - D1-35 (IGT6) Always Below 1 ohms D29-2 (IGF) - D1-104 (IGF1) Always Below 1 ohms D30-2 (IGF) - D1-104 (IGF1) Always Below 1 ohms D31-2 (IGF) - D1-104 (IGF1) Always Below 1 ohms D32-2 (IGF) - D1-104 (IGF1) Always Below 1 ohms D33-2 (IGF) - D1-104 (IGF1) Always Below 1 ohms D34-2 (IGF) - D1-104 (IGF1) Always Below 1 ohms Standard Resistance (Check for Short) Tester Connection Condition Specified Condition D29-3 (IGT1) or D1-40 (IGT1) - Body ground Always 10 kohms or higher D30-3 (IGT2) or D1-39 (IGT2) - Body ground Always 10 kohms or higher D31-3 (IGT3) or D1-38 (IGT3) - Body ground Always 10 kohms or higher D32-3 (IGT4) or D1-37 (IGT4) - Body ground Always 10 kohms or higher D33-3 (IGT5) or D1-36 (IGT5) - Body ground Always 10 kohms or higher D34-3 (IGT6) or D1-35 (IGT6) - Body ground Always 10 kohms or higher D29-2 (IGF) or D1-104 (IGF1) - Body ground Always 10 kohms or higher D30-2 (IGF) or D1-104 (IGF1) - Body ground Always 10 kohms or higher D31-2 (IGF) or D1-104 (IGF1) - Body ground Always 10 kohms or higher D32-2 (IGF) or D1-104 (IGF1) - Body ground Always 10 kohms or higher D33-2 (IGF) or D1-104 (IGF1) - Body ground Always 10 kohms or higher D34-2 (IGF) or D1-104 (IGF1) - Body ground Always 10 kohms or higher TEXT IN ILLUSTRATION *1 Front view of wire harness connector (to Ignition Coil Assembly) *2 Front view of wire harness connector (to ECM) Reconnect the ignition coil assembly connectors. Reconnect the ECM connector. NG --> REPAIR OR REPLACE HARNESS OR CONNECTOR (IGNITION COIL ASSEMBLY - ECM) OK --> See step 7
5. INSPECT IGNITION COIL ASSEMBLY (GROUND CIRCUIT) Disconnect the ignition coil assembly connectors. Measure the resistance according to the value(s) in the table below. Standard Resistance (Check for Open) Tester Connection Condition Specified Condition D29-4 (GND) - Body ground Always Below 1 ohms D30-4 (GND) - Body ground Always Below 1 ohms D31-4 (GND) - Body ground Always Below 1 ohms D32-4 (GND) - Body ground Always Below 1 ohms D33-4 (GND) - Body ground Always Below 1 ohms D34-4 (GND) - Body ground Always Below 1 ohms TEXT IN ILLUSTRATION *1 Front view of wire harness connector (to Ignition Coil Assembly) Reconnect the ignition coil assembly connectors. NG --> REPAIR OR REPLACE HARNESS OR CONNECTOR (IGNITION COIL ASSEMBLY - BODY GROUND) OK --> REPAIR OR REPLACE HARNESS OR CONNECTOR (IGNITION COIL ASSEMBLY - IG2 RELAY)
6. REPLACE IGNITION COIL ASSEMBLY. Refer to «REMOVAL»(ref-400788-S00842969802011051800000)
7. REPLACE ECM. Refer to «REMOVAL»(ref-400788-S26250166532011051800000)

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

1. Read freeze frame data using the Techstream. The ECM records vehicle and driving condition information as freeze frame data the moment a DTC is stored. When troubleshooting, freeze frame data can help determine if the vehicle was moving or stationary, if the engine was warmed up or not, if the air fuel ratio was lean or rich, and other data from the time the malfunction occurred.
2. If no problem is found by this diagnostic troubleshooting procedure, troubleshoot the engine mechanical system.

Scheme 291

Scheme 292

Scheme 293

1. CHECK VVT SENSOR FOR EXHAUST SIDE (SENSOR POWER SOURCE) Disconnect the 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 Switch Condition Specified Condition D39-3 (VC2) - Body ground Engine switch on (IG) 4.5 to 5.5 V D38-3 (VC2) - Body ground Engine switch on (IG) 4.5 to 5.5 V TEXT IN ILLUSTRATION *1 Front view of wire harness connector (to VVT Sensor for Exhaust Side) *2 Bank 1 *3 Bank 2 Reconnect the VVT sensor connector. NG --> See step 7 OK: Go to next step
2. 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 D39-1 (EX+) - D1-69 (EV1+) Always Below 1 ohms D39-2 (EX-) - D1-89 (VV1-) Always Below 1 ohms D38-1 (EX+) - D1-64 (EV2+) Always Below 1 ohms D38-2 (EX-) - D1-89 (VV1-) Always Below 1 ohms Standard Resistance (Check for Short) Tester Connection Condition Specified Condition D39-1 (EX+) or D1-69 (EV1+) - Body ground Always 10 kohms or higher D39-2 (EX-) or D1-89 (VV1-) - Body ground Always 10 kohms or higher D38-1 (EX+) or D1-64 (EV2+) - Body ground Always 10 kohms or higher D38-2 (EX-) or D1-89 (VV1-) - Body ground Always 10 kohms or higher TEXT IN ILLUSTRATION *1 Front view of wire harness connector (to VVT Sensor for Exhaust Side) *2 Front view of wire harness connector (to ECM) *3 Bank 1 *4 Bank 2 Reconnect the VVT sensor connector. Reconnect the ECM connector. NG --> REPAIR OR REPLACE HARNESS OR CONNECTOR (VVT SENSOR FOR EXHAUST SIDE - ECM) OK: Go to next step
3. CHECK SENSOR INSTALLATION (VVT SENSOR FOR EXHAUST SIDE) Check the VVT sensor installation. OK Sensor is installed correctly. NG --> See step 9 OK: Go to next step
4. CHECK EXHAUST CAMSHAFT Check the teeth of the signal plate. OK Signal plate teeth do not have any cracks or deformation. NG --> See step 10 OK: Go to next step
5. REPLACE VVT SENSOR FOR EXHAUST SIDE Replace the VVT sensor for exhaust side. Refer to «REMOVAL»(ref-400788-S07691691552011051800000) . NEXT: Go to next step
6. CHECK WHETHER DTC OUTPUT RECURS (DTC P0365, P0367, P0368, P0390, P0392 AND/OR P0393) 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-400784-S05337578742011051800000) . Turn the engine switch off. 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 the Confirmation Driving Pattern. Enter the following menus: Powertrain / Engine / Utility / All Readiness. Input the DTC: P0365, P0367, P0368, P0390, P0392, or P0393. Check the DTC judgment result. Result Result Proceed to NORMAL (DTC is not output) A ABNORMAL (DTC P0365, P0367, P0368, P0390, P0392 or P0393 is output) 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 D39-3 (VC2) - D1-67 (VCV1) Always Below 1 ohms D38-3 (VC2) - D1-67 (VCV1) Always Below 1 ohms Standard Resistance (Check for Short) Tester Connection Condition Specified Condition D39-3 (VC2) or D1-67 (VCV1) - Body ground Always 10 kohms or higher D38-3 (VC2) or D1-67 (VCV1) - Body ground Always 10 kohms or higher TEXT IN ILLUSTRATION *1 Front view of wire harness connector (to VVT Sensor for Exhaust Side) *2 Front view of wire harness connector (to ECM) *3 Bank 1 *4 Bank 2 Reconnect the VVT sensor connector. Reconnect the ECM connector. NG --> REPAIR OR REPLACE HARNESS OR CONNECTOR (VVT SENSOR FOR EXHAUST SIDE - ECM) OK --> See step 11
8. REPLACE ECM. Refer to «REMOVAL»(ref-400788-S26250166532011051800000)
9. SECURELY REINSTALL VVT SENSOR FOR EXHAUST SIDE. Refer to «REMOVAL»(ref-400788-S07691691552011051800000)
10. REPLACE EXHAUST CAMSHAFT. Refer to «REMOVAL»(ref-400790-S30220941282011051800000)
11. REPLACE ECM. Refer to «REMOVAL»(ref-400788-S26250166532011051800000)

HINT

1. Read freeze frame data using the Techstream. The ECM records vehicle and driving condition information as freeze frame data the moment a DTC is stored. When troubleshooting, freeze frame data can help determine if the vehicle was moving or stationary, if the engine was warmed up or not, if the air fuel ratio was lean or rich, and other data from the time the malfunction occurred.
2. If no problem is found by this diagnostic troubleshooting procedure, troubleshoot the engine mechanical system.

CONDITIONING FOR SENSOR TESTING

HINT

Perform the operation with the engine speeds and time durations described below prior to checking the waveforms (Scheme 295) of the air fuel ratio and heated oxygen sensors. This is in order to activate the sensors sufficiently to obtain the appropriate inspection results.

Scheme 294

1. Connect the Techstream to the DLC3 [A].
2. Start the engine and warm it up with all the accessories switched off, until the engine coolant temperature stabilizes [B].
3. Run the engine at an engine speed of between 2500 rpm and 3000 rpm for at least 3 minutes [C].
4. While running the engine at 3000 rpm and 2000 rpm for 2 seconds, check the waveforms (Scheme 295) of the air fuel ratio and heated oxygen sensors using the Techstream [D]. HINT: If either of the voltage outputs of the air fuel ratio or heated oxygen sensor does not fluctuate, or either of the sensors makes a noise, the sensor may be malfunctioning. 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, enter the following menus: Powertrain / Engine / Active Test / Control the Injection Volume for A/F Sensor. If the three-way catalytic converter has deteriorated, the heated oxygen sensor (located behind the three-way catalytic converter) voltage output fluctuates up and down frequently, even under normal driving conditions (active air fuel ratio control is not performed).

Scheme 295

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Scheme 298

1. AIR FUEL RATIO CONTROL HINT: Malfunctioning areas can be identified by performing the Control the Injection Volume for A/F Sensor function provided in the Active Test. The Control the Injection Volume for A/F Sensor function can help to determine whether the air fuel ratio sensor, heated oxygen sensor and other potential trouble areas are malfunctioning. The following instructions describe how to conduct the Control the Injection Volume for A/F Sensor operation using the Techstream. Connect the Techstream to the DLC3. Start the engine. Turn the Techstream on. Warm up the engine at an engine speed of 2500 rpm for approximately 90 seconds. Enter the following menus: Powertrain / Engine / Active Test / Control the Injection Volume for A/F Sensor. Perform the Active Test operation with the engine in an idling condition (press the RIGHT or LEFT button to change the fuel injection volume). Monitor the voltage outputs of the air fuel ratio and heated oxygen sensors (AFS Voltage B1S1 and O2S B1S2 or AFS Voltage B2S1 and O2S B2S2) displayed on the Techstream. HINT: The Control the Injection Volume for A/F Sensor operation lowers the fuel injection volume by 12.5% or increases the injection volume by 25%. Each sensor reacts in accordance with increases and decreases in the fuel injection volume. Techstream Display (Sensor) Injection Volume Status Voltage AFS Voltage B1S1 or AFS Voltage B2S1 (Air fuel ratio) +25% Rich Less than 3.1 V AFS Voltage B1S1 or AFS Voltage B2S1 (Air fuel ratio) -12.5% Lean More than 3.4 V O2S B1S2 or O2S B2S2 (Heated oxygen) +25% Rich More than 0.55 V O2S B1S2 or O2S B2S2 (Heated oxygen) -12.5% Lean Less than 0.4 V NOTE: 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. 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 Exhaust gas leaks 4 Fuel pressure Exhaust gas leaks (Air fuel ratio extremely lean or rich) Following the Control the Injection Volume for A/F Sensor procedure enables technicians to check and graph the voltage outputs of both the air fuel ratio and heated oxygen sensors. To display the graph, enter the following menus: Powertrain / Engine / Active Test / Control the Injection Volume for A/F Sensor / A/F Control System / AFS Voltage B1S1 and O2S B1S2 or AFS Voltage B2S1 and O2S B2S2. 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

Perform the operation with the engine speeds and time durations described below prior to checking the waveforms (Scheme 295) of the air fuel ratio and heated oxygen sensors. This is in order to activate the sensors sufficiently to obtain the appropriate inspection results.

1. Connect the Techstream to the DLC3 [A].
2. Start the engine and warm it up with all the accessories switched off, until the engine coolant temperature stabilizes [B].
3. Run the engine at an engine speed of between 2500 rpm and 3000 rpm for at least 3 minutes [C].
4. While running the engine at 3000 rpm and 2000 rpm for 2 seconds, check the waveforms (Scheme 295) of the air fuel ratio and heated oxygen sensors using the Techstream [D]. HINT: If either of the voltage outputs of the air fuel ratio or heated oxygen sensor does not fluctuate, or either of the sensors makes a noise, the sensor may be malfunctioning. 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, enter the following menus: Powertrain / Engine / Active Test / Control the Injection Volume for A/F Sensor. If the three-way catalytic converter has deteriorated, the heated oxygen sensor (located behind the three-way catalytic converter) voltage output fluctuates up and down frequently, even under normal driving conditions (active air fuel ratio control is not performed).

1. AIR FUEL RATIO CONTROL HINT: Malfunctioning areas can be identified by performing the Control the Injection Volume for A/F Sensor function provided in the Active Test. The Control the Injection Volume for A/F Sensor function can help to determine whether the air fuel ratio sensor, heated oxygen sensor and other potential trouble areas are malfunctioning. The following instructions describe how to conduct the Control the Injection Volume for A/F Sensor operation using the Techstream. Connect the Techstream to the DLC3. Start the engine. Turn the Techstream on. Warm up the engine at an engine speed of 2500 rpm for approximately 90 seconds. Enter the following menus: Powertrain / Engine / Active Test / Control the Injection Volume for A/F Sensor. Perform the Active Test operation with the engine in an idling condition (press the RIGHT or LEFT button to change the fuel injection volume). Monitor the voltage outputs of the air fuel ratio and heated oxygen sensors (AFS Voltage B1S1 and O2S B1S2 or AFS Voltage B2S1 and O2S B2S2) displayed on the Techstream. HINT: The Control the Injection Volume for A/F Sensor operation lowers the fuel injection volume by 12.5% or increases the injection volume by 25%. Each sensor reacts in accordance with increases and decreases in the fuel injection volume. Techstream Display (Sensor) Injection Volume Status Voltage AFS Voltage B1S1 or AFS Voltage B2S1 (Air fuel ratio) +25% Rich Less than 3.1 V AFS Voltage B1S1 or AFS Voltage B2S1 (Air fuel ratio) -12.5% Lean More than 3.4 V O2S B1S2 or O2S B2S2 (Heated oxygen) +25% Rich More than 0.55 V O2S B1S2 or O2S B2S2 (Heated oxygen) -12.5% Lean Less than 0.4 V NOTE: 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. 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 Exhaust gas leaks 4 Fuel pressure Exhaust gas leaks (Air fuel ratio extremely lean or rich) Following the Control the Injection Volume for A/F Sensor procedure enables technicians to check and graph the voltage outputs of both the air fuel ratio and heated oxygen sensors. To display the graph, enter the following menus: Powertrain / Engine / Active Test / Control the Injection Volume for A/F Sensor / A/F Control System / AFS Voltage B1S1 and O2S B1S2 or AFS Voltage B2S1 and O2S B2S2. 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.

DTC SUMMARY

HINT

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

Refer to the EVAP System. Refer to INSPECTION PROCEDURE .

HINT

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

Refer to the EVAP System. Refer to INSPECTION PROCEDURE .

Refer to the EVAP System. Refer to INSPECTION PROCEDURE .

Refer to the EVAP System. Refer to INSPECTION PROCEDURE .

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

HINT

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

Scheme 299

Scheme 300

Scheme 301

1. PERFORM ACTIVE TEST USING TECHSTREAM (PURGE VSV) Connect the Techstream to the DLC3. Remove the vacuum hose of the purge VSV from the canister. Start the engine and turn the Techstream on. Enter the following menus: Powertrain / Engine / Active Test / Activate the VSV for Evap Control. Check if air is sucked into the port when operating the purge VSV using the Techstream. OK Techstream Operation Specified Condition Purge VSV is on Suction of air Purge VSV is off No suction of air NG --> See step 2 OK --> See step 5
2. INSPECT PURGE VSV Inspect the purge VSV. Refer to «INSPECTION»(ref-400795-S28416900042011051800000) . NG --> See step 6 OK: Go to next step
3. INSPECT 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 D6-1 - Body ground Engine switch on (IG) 11 to 14 V TEXT IN ILLUSTRATION *1 Front view of wire harness connector (to Purge VSV) Reconnect the purge VSV connector. NG --> REPAIR OR REPLACE HARNESS OR CONNECTOR (PURGE VSV - EFI MAIN RELAY) OK: Go to next step
4. 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 D6-2 (Purge VSV) - D1-63 (PRG) Always Below 1 ohms Standard Resistance (Check for Short) Tester Connection Condition Specified Condition D6-2 (Purge VSV) or D1-63 (PRG) - Body ground Always 10 kohms or higher TEXT IN ILLUSTRATION *1 Front view of wire harness connector (to Purge VSV) *2 Front view of wire harness connector (to ECM) Reconnect the purge VSV connector. Reconnect the ECM connector. NG --> REPAIR OR REPLACE HARNESS OR CONNECTOR (PURGE VSV - ECM) OK --> See step 7
5. CHECK FOR INTERMITTENT PROBLEMS. Refer to «CHECK FOR INTERMITTENT PROBLEMS»(ref-400784-S03039419332011051800000)
6. REPLACE PURGE VSV. Refer to «REMOVAL»(ref-400795-S22153643722011051800000)
7. REPLACE ECM. Refer to «REMOVAL»(ref-400788-S26250166532011051800000)

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

HINT

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

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 302

Scheme 303

Scheme 304

Scheme 305

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 / Trouble Codes. Read the DTCs. Enter the following menus: Powertrain / Engine / Data List / Vapor Pressure Pump. Read the EVAP (Evaporative Emission) pressure displayed on the Techstream. Result Display (DTC Output) Test Result Suspected Trouble Area Proceed to P0451 - Canister pressure sensor C P0452 Less than 45 kPa (338 mmHg) Wire harness/connector (ECM - canister pressure sensor) Canister pressure sensor Short in ECM circuit A P0453 More than 120 kPa (900 mmHg) Wire harness/connector (ECM - canister pressure sensor) Canister pressure sensor Open in ECM circuit B C --> See step 4 B --> See step 5 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. TEXT IN ILLUSTRATION *1 Front view of wire harness connector (to ECM) Result Tester Connection Condition Specified Condition Suspected Trouble Area Proceed to D1-121 (PPMP) - Body ground Always Below 10 ohms Wire harness/connector (ECM - canister pressure sensor) Short in canister pressure sensor circuit A 10 kohms or higher Wire harness/connector (ECM - canister pressure sensor) Short in ECM circuit B Reconnect the ECM connector. B --> See step 8 A: Go to next step
3. CHECK HARNESS AND CONNECTOR (CANISTER PUMP MODULE - ECM) Disconnect the canister pump module connector. Disconnect the ECM connector. Measure the resistance according to the value(s) in the table below. TEXT IN ILLUSTRATION *1 Front view of wire harness connector (to ECM) Result Tester Connection Condition Specified Condition Suspected Trouble Area Proceed to D1-121 (PPMP) - Body ground Always 10 kohms or higher Short in canister pressure sensor circuit A Below 10 ohms Short in wire harness/connector (ECM - Canister pressure sensor) B Reconnect the canister pump module connector. Reconnect the ECM connector. B --> See step 7 A --> See step 6
4. GO TO EVAP SYSTEM. Refer to «EVAP System»(ref-400785-S09620487802011051800000)
5. CHECK HARNESS AND CONNECTOR (CANISTER PUMP MODULE - ECM) Disconnect the 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 Voltage Tester Connection Switch Condition Specified Condition O12-6 (VCC) - Body ground Engine switch on (IG) 4.5 to 5.5 V O12-7 (VOUT) - Body ground Engine switch on (IG) 4.5 to 5.5 V Standard Resistance (Check for Open) Tester Connection Condition Specified Condition O12-8 (SGND) - Body ground Always Below 100 ohms TEXT IN ILLUSTRATION *1 Front view of wire harness connector (to Canister Pump Module) Result Test Result Suspected Trouble Area Proceed to Voltage and resistance within standard ranges Open in canister pressure sensor circuit A Voltage and resistance outside standard ranges Open in wire harness/connector (ECM - canister pressure sensor) B Reconnect the canister pump module connector. B --> See step 7 A: Go to next step
6. REPLACE CANISTER Replace the canister. Refer to «REMOVAL»(ref-400795-S14536407672011051800000) . NOTE: When replacing the canister, check the canister pump module interior and related pipes for water, fuel and other liquids. If liquids are present, check for disconnections and/or cracks in the following: 1) the pipe from the air inlet port to the canister pump module; 2) the canister filter; and 3) the fuel tank vent hose. TEXT IN ILLUSTRATION *1 Fuel Tank Vent Hose *2 Vent Hose *3 Air Inlet Port *4 Inspection Area (Check for Disconnection and/or cracks) NEXT --> See step 9
7. REPAIR OR REPLACE HARNESS OR CONNECTOR (CANISTER PUMP MODULE - ECM) HINT: If the exhaust tail pipe assembly has been removed, go to the next step before reinstalling it. NEXT --> See step 9
8. REPLACE ECM Replace the ECM. Refer to «REMOVAL»(ref-400788-S26250166532011051800000) . NEXT --> See step 9
9. 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-400784-S05337578742011051800000) . Turn the engine switch off. 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 the Confirmation Driving Pattern. Enter the following menus: Powertrain / Engine / Utility / All Readiness. Input the DTC: P0451, P0452 or P0453. Check the DTC judgment result. HINT: If DTC judgment result is NORMAL, the repair has been successfully completed. NEXT --> END

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.

Refer to the EVAP System. Refer to INSPECTION PROCEDURE .

Refer to the 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.

Scheme 306

Scheme 307

1. READ VALUE USING TECHSTREAM (VEHICLE SPEED) Drive the vehicle and check whether the operation of the speedometer in the combination meter assembly 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 for a speedometer malfunction. Connect the Techstream to the DLC3. Turn the engine switch on (IG). Turn the Techstream on. Enter the following menus: Powertrain / Engine / Data List / Vehicle Speed. Drive the vehicle. Read the value displayed on the Techstream. OK Vehicle speeds displayed on the Techstream and speedometer display are equal. NG --> See step 2 OK --> See step 6
2. CHECK COMBINATION METER ASSEMBLY (SPD SIGNAL WAVEFORM) Inspect the combination meter assembly using an oscilloscope. Move the shift lever to N. Jack up the vehicle. Turn the engine switch on (IG). Measure the voltage between the terminal of the combination meter assembly and the body ground while the wheel is turned slowly. Standard Voltage Tester Connection Switch Condition Specified Condition F15-3 (+S) - Body ground Engine switch on (IG) Voltage generated intermittently TEXT IN ILLUSTRATION *1 Rear view of wire harness connector (to Combination Meter Assembly) *2 Turn Wheel HINT: The output voltage should fluctuate up and down, similarly to the diagram, when the wheel is turned slowly. NG --> See step 5 OK: Go to next step
3. CHECK HARNESS AND CONNECTOR (COMBINATION METER ASSEMBLY - ECM) Disconnect the combination meter assembly connector. Disconnect the ECM connector. Measure the resistance according to the value(s) in the table below. Standard Resistance Tester Connection Condition Specified Condition F15-3 (+S) - A43-13 (SPD) Always Below 1 ohms TEXT IN ILLUSTRATION *1 Front view of wire harness connector (to Combination Meter Assembly) *2 Front view of wire harness connector (to ECM) Reconnect the combination meter assembly connector. Reconnect the ECM connector. NG --> REPAIR OR REPLACE HARNESS OR CONNECTOR (COMBINATION METER ASSEMBLY - ECM) OK --> See step 4
4. REPLACE ECM. Refer to «REMOVAL»(ref-400788-S26250166532011051800000)
5. GO TO METER / GAUGE SYSTEM (SPEED SIGNAL CIRCUIT). Refer to «Speed Signal Circuit»(ref-400803-S06809283612011051800000)
6. CHECK FOR INTERMITTENT PROBLEMS. Refer to «CHECK FOR INTERMITTENT PROBLEMS»(ref-400784-S03039419332011051800000)

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.

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

HINT

1. Read freeze frame data using the Techstream. The ECM records vehicle and driving condition information as freeze frame data the moment a DTC is stored. When troubleshooting, freeze frame data can help determine if the vehicle was moving or stationary, if the engine was warmed up or not, if the air fuel ratio was lean or rich, and other data from the time the malfunction occurred.
2. STP signal 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 / Data List / Stop Light Switch. Check the STP signal when the brake pedal is depressed and released. Brake Pedal Operation Specified Condition Depressed STP signal on Released STP signal off

Scheme 308

Scheme 309

Scheme 310

1. CHECK STOP LIGHT SWITCH ASSEMBLY (TERMINAL VOLTAGE) Disconnect the stop light switch assembly connector. Measure the voltage according to the value(s) in the table below. Standard Voltage Tester Connection Condition Specified Condition A47-2 - Body ground Always 11 to 14 V TEXT IN ILLUSTRATION *1 Front view of wire harness connector (to Stop Light Switch Assembly) Reconnect the stop light switch assembly connector. NG --> REPAIR OR REPLACE HARNESS OR CONNECTOR (STOP LIGHT SWITCH ASSEMBLY - BATTERY) OK: Go to next step
2. CHECK STOP LIGHT SWITCH ASSEMBLY (TERMINAL VOLTAGE) Disconnect the stop light switch assembly 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 A47-4 - Body ground Engine switch on (IG) 11 to 14 V TEXT IN ILLUSTRATION *1 Front view of wire harness connector (to Stop Light Switch Assembly) Reconnect the stop light switch assembly connector. NG --> REPAIR OR REPLACE HARNESS OR CONNECTOR (STOP LIGHT SWITCH ASSEMBLY - IG2 RELAY) OK: Go to next step
3. 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 Tester Connection Switch Position Specified Condition 1 - 2 Switch pin not pushed Below 1 ohms Switch pin pushed 10 kohms or higher 3 - 4 Switch pin not pushed 10 kohms or higher Switch pin pushed Below 1 ohms Reinstall the stop light switch assembly. NG --> See step 5 OK: Go to next step
4. CHECK 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 Brake Pedal Operation Specified Condition A43-35 (ST1-) - Body ground Released 7.5 to 14 V Depressed 0 to 1.5 V A43-36 (STP) - Body ground Released 0 to 1.5 V Depressed 7.5 to 14 V Reconnect the ECM connector. NG --> REPAIR OR REPLACE HARNESS OR CONNECTOR (STOP LIGHT SWITCH ASSEMBLY - ECM) OK --> See step 6
5. REPLACE STOP LIGHT SWITCH ASSEMBLY. Refer to «REMOVAL»(ref-400664-S28919321902011051800000)
6. REPLACE ECM. Refer to «REMOVAL»(ref-400788-S26250166532011051800000)

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

HINT

1. Read freeze frame data using the Techstream. The ECM records vehicle and driving condition information as freeze frame data the moment a DTC is stored. When troubleshooting, freeze frame data can help determine if the vehicle was moving or stationary, if the engine was warmed up or not, if the air fuel ratio was lean or rich, and other data from the time the malfunction occurred.
2. STP signal 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 / Data List / Stop Light Switch. Check the STP signal when the brake pedal is depressed and released. Brake Pedal Operation Specified Condition Depressed STP signal on Released STP signal off

HINT

1. The following conditions may also cause DTC P0505 to be set: The floor carpet overlapping onto the accelerator pedal, causing the accelerator pedal to be slightly depressed and therefore the throttle valve position to be slightly open. The accelerator pedal being not fully released.
2. Read freeze frame data using the Techstream. The ECM records vehicle and driving condition information as freeze frame data the moment a DTC is stored. When troubleshooting, freeze frame data can 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 conditions may also cause DTC P0505 to be set: The floor carpet overlapping onto the accelerator pedal, causing the accelerator pedal to be slightly depressed and therefore the throttle valve position to be slightly open. The accelerator pedal being not fully released.
2. Read freeze frame data using the Techstream. The ECM records vehicle and driving condition information as freeze frame data the moment a DTC is stored. When troubleshooting, freeze frame data can help determine if the vehicle was moving or stationary, if the engine was warmed up or not, if the air fuel ratio was lean or rich, and other data from the time the malfunction occurred.

HINT

Read freeze frame data using the Techstream. 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

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

1. DTC P050B may be set when the engine shows the symptom as listed below. If necessary, check the trouble area as listed below. Symptom Factor Trouble Area Low idle speed at engine cold. Excessive engine friction Engine oil deterioration Drive belt tension Cooler compressor assembly Generator assembly 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 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. DTC P050B may be set when the engine shows the symptom as listed below. If necessary, check the trouble area as listed below. Symptom Factor Trouble Area Low idle speed at engine cold. Excessive engine friction Engine oil deterioration Drive belt tension Cooler compressor assembly Generator assembly 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 help determine if the vehicle was moving or stationary, if the engine was warmed up or not, if the air fuel ratio was lean or rich, and other data from the time the malfunction occurred.

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

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 311

1. CHECK HARNESS AND CONNECTOR (EFI NO. 1 FUSE - ECM) Disconnect the ECM connector. Remove the EFI No. 1 fuse 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 Condition Specified Condition 2 (EFI No. 1 fuse) - A43-1 (BATT) Always Below 1 ohms Standard Resistance (Check for Short) Tester Connection Condition Specified Condition 2 (EFI No. 1 fuse) or A43-1 (BATT) - Body ground Always 10 kohms or higher TEXT IN ILLUSTRATION *1 Engine Room Relay Block *2 Front view of wire harness connector (to ECM) Reconnect the ECM connector. Reinstall the EFI No. 1 fuse. NG --> REPAIR OR REPLACE HARNESS OR CONNECTOR (EFI NO. 1 FUSE - ECM) OK: Go to next step
2. INSPECT BATTERY Check the battery voltage. Battery voltage 11 to 14 V NG --> REPLACE BATTERY OK: Go to next step
3. 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 --> See step 4
4. CHECK FOR INTERMITTENT PROBLEMS. Refer to «CHECK FOR INTERMITTENT PROBLEMS»(ref-400784-S03039419332011051800000)

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

HINT

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

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.

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.