Engine Control System (Diagnostic Codes (P0504-U0101) & Circuit Tests)): Diagnosis Scion tC II

INSPECTION PROCEDURE

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

HINT

1. Read freeze frame data using the Techstream. Freeze frame data records the engine condition when malfunctions are detected. When troubleshooting, freeze frame data can help determine if the vehicle was moving or stationary, if the engine was warmed up or not, if the air-fuel ratio was lean or rich, and other data from the time the malfunction occurred.
2. Stop light switch conditions can be checked using the Techstream. Connect the Techstream to the DLC3. Turn the ignition switch to ON. Turn the Techstream on. Enter the following menus: Powertrain / Engine / Data List / All Data / Stop Light Switch and ST1. Check the Data List indication when the brake pedal is depressed and released.

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1. READ VALUE USING TECHSTREAM (STOP LIGHT SWITCH) Connect the Techstream to the DLC3. Turn the ignition switch to ON. Turn the Techstream on. Enter the following menus: Powertrain / Engine / All Data / Stop Light Switch. Read the value displayed on the Techstream. Standard Condition Specified Condition Brake pedal depressed STP signal ON Brake pedal released STP signal OFF NG --> See step 2 OK --> See step 6
2. INSPECT STOP LIGHT SWITCH ASSEMBLY (B+ VOLTAGE) Disconnect the stop light switch connector. Measure the voltage according to the value(s) in the table below. Standard Voltage Tester Connection Condition Specified Condition A1-2 - Body ground Always 11 to 14 V A1-4 - Body ground Ignition switch ON 11 to 14 V TEXT IN ILLUSTRATION *a Front view of wire harness connector (to Stop Light Switch Assembly) NG --> REPAIR OR REPLACE HARNESS OR CONNECTOR (STOP LIGHT SWITCH - BATTERY, INTEGRATION RELAY) OK: Go to next step
3. INSPECT STOP LIGHT SWITCH ASSEMBLY Inspect the stop light switch assembly. Refer to «INSPECTION»(ref-451186-S31823982232012020700000) . NG --> See step 5 OK: Go to next step
4. INSPECT ECM (STP AND ST1- VOLTAGE) Disconnect the ECM connector. Turn the ignition switch to ON. Measure the voltage according to the value(s) in the table below. Standard Voltage Tester Connection Condition Specified Condition A35-39 (ST1-) - Body ground Brake pedal released 11 to 14 V Brake pedal depressed 0 to 3 V A35-29 (STP) - Body ground Brake pedal released 0 to 3 V Brake pedal depressed 11 to 14 V TEXT IN ILLUSTRATION *a Depressed *b Released *c Front view of wire harness connector (to ECM) NG --> REPAIR OR REPLACE HARNESS OR CONNECTOR OK --> See step 7
5. REPLACE STOP LIGHT SWITCH ASSEMBLY. Refer to «REMOVAL»(ref-451186-S12977845582012020700000)
6. CHECK FOR INTERMITTENT PROBLEMS. Refer to «CHECK FOR INTERMITTENT PROBLEMS»(ref-451061-S02913597072012020700000)
7. REPLACE ECM. Refer to «REMOVAL»(ref-451166-S22630148492012020700000)

HINT

1. The following conditions may also cause DTC P0505 to be stored: The floor carpet overlapping slightly onto the accelerator pedal, causing the accelerator pedal to be slightly depressed and therefore the throttle valve position to be slightly open. The accelerator pedal being not fully released.
2. Read freeze frame data using the Techstream. Freeze frame data records the engine condition when malfunctions are detected. When troubleshooting, freeze frame data can help determine if the vehicle was moving or stationary, if the engine was warmed up or not, if the air-fuel ratio was lean or rich, and other data from the time the malfunction occurred.
3. Refer to "Data List / Active Test" [Engine Speed]. Refer to «DATA LIST / ACTIVE TEST»(ref-451061-S12130890322012020700000) .

HINT

1. DTC P050B may be stored when the engine has the symptoms listed below. If necessary, check the trouble areas listed below. Symptom Factor Trouble Area Low idle speed when engine is cold (immediately after engine start) Excessive engine friction Engine oil deterioration Drive belt tension A/C compressor Generator Rough idle when engine is cold (immediately after engine start) Abnormal combustion Fuel quality
2. Read freeze frame data using the Techstream. The ECM records vehicle and driving condition information as freeze frame data the moment a DTC is stored. When troubleshooting, freeze frame data can be helpful in determining whether the vehicle was moving or stationary, whether the engine was warmed up or not, whether the air-fuel ratio was lean or rich, as well as other data recorded at the time of a malfunction.

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

HINT

Read freeze frame data using the Techstream. Freeze frame data records the engine condition when malfunctions are detected. When troubleshooting, freeze frame data can help determine if the vehicle was moving or stationary, if the engine was warmed up or not, if the air-fuel ratio was lean or rich, and other data from the time the malfunction occurred.

HINT

1. The following troubleshooting flowchart is based on the premise that the engine can be cranked normally. If the engine does not crank, proceed to Problem Symptoms Table. Refer to «PROBLEM SYMPTOMS TABLE»(ref-451061-S17066097812012020700000) .
2. Read freeze frame data using the Techstream. Freeze frame data records the engine condition when malfunctions are detected. When troubleshooting, freeze frame data can help determine if the vehicle was moving or stationary, if the engine was warmed up or not, if the air-fuel ratio was lean or rich, and other data from the time the malfunction occurred.

Note. There is a possibility that the DTC P062F is issued from the ECUs of the ECM and TCM. Use Techstream to conduct a health check to confirm which ECU the DTC is issued from and then inspect the related system.

1. DATA LIST HINT: Using the Techstream to read the Data List allows the values or states of switches, sensors, actuators and other items to be read without removing any parts. This non-intrusive inspection can be very useful because intermittent conditions or signals may be discovered before parts or wiring is disturbed. Reading the Data List information early in troubleshooting is one way to save diagnostic 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. Warm up the engine. Turn the ignition switch off. Connect the Techstream to the DLC3. Turn the ignition switch to ON. Turn the Techstream on. Enter the following menus: Powertrain / Engine / Data List / All Data. According to the display on the Techstream, read the Data List. Tester Display Measurement Item/Range Normal Condition Diagnostic Note Shift SW Status (R Range) Park/neutral position switch status/ ON or OFF Shift lever in R: ON Shift lever not in R: OFF When the shift lever position displayed on the Techstream differs from the actual position, the adjustment of the park/neutral position switch or shift cable may be incorrect. Shift SW Status (P Range) Park/neutral position switch status/ ON or OFF Shift lever in P: ON Shift lever not in P: OFF When the shift lever position displayed on the Techstream differs from the actual position, the adjustment of the park/neutral position switch or shift cable may be incorrect. Shift SW Status (N Range) Park/neutral position switch status/ ON or OFF Shift lever in N: ON Shift lever not in N: OFF When the shift lever position displayed on the Techstream differs from the actual position, the adjustment of the park/neutral position switch or shift cable may be incorrect. Shift SW Status (D Range) Park/neutral position switch status/ ON or OFF Shift lever in D, M or S: ON Shift lever not in D, M or S: OFF When the shift lever position displayed on the Techstream differs from the actual position, the adjustment of the park/neutral position switch or shift cable may be incorrect. Sports Mode Selection SW Transmission control switch status/ ON or OFF Shift lever in M (or S), "+" or "-": ON Shift lever not in M (or S), "+" or "-": OFF

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1. READ VALUE USING TECHSTREAM Connect the Techstream to the DLC3. Turn the ignition switch to ON. Turn the Techstream on. Enter the following menus: Powertrain / Engine / Data List / All Data. According to the display on the Techstream, read the Data List. OK Tester Display Shift Lever Position Specified Condition Neutral Position SW Signal N --> R --> P ON --> OFF --> ON Shift SW Status (R Range) N --> R OFF --> ON Shift SW Status (P Range) P ON Shift SW Status (N Range) N ON Shift SW Status (D Range) N --> D OFF --> ON NG --> See step 5 OK: Go to next step
2. READ VALUE USING TECHSTREAM Connect the Techstream to the DLC3. Turn the ignition switch to ON. Turn the Techstream on. Enter the following menus: Powertrain / Engine / Data List / All Data. According to the display on the Techstream, read the Data List. OK Tester Display Shift Lever Position Specified Condition Sports Mode Selection SW D --> M or S OFF --> ON NG --> See step 3 OK --> See step 11
3. INSPECT TRANSMISSION CONTROL SWITCH Inspect the transmission control switch. Refer to «INSPECTION - Step 3»(ref-451170-S39899142032012020700000) . NG --> See step 9 OK: Go to next step
4. CHECK HARNESS AND CONNECTOR (ECM - BODY GROUND) Disconnect the ECM connector. Turn the ignition switch to ON. Measure the voltage according to the value(s) in the table below. Standard Voltage Tester Connection Shift Lever Position Switch Condition Specified Condition A35-14 (S) - Body ground M (or S), "+" or "-" Ignition switch ON 11 to 14 V* Not in M (or S), "+" or "-" Ignition switch ON 0 to 1.5 V* TEXT IN ILLUSTRATION *a Front view of wire harness connector (to ECM) HINT: *: The voltage will drop slightly due to the turning on of the back up light. NG --> REPAIR OR REPLACE HARNESS OR CONNECTOR OK --> See step 12
5. CHECK HARNESS AND CONNECTOR (BATTERY - PARK/NEUTRAL POSITION SWITCH) Disconnect the park/neutral position switch. Turn the ignition switch to ON. Measure the voltage according to the value(s) in the table below. Standard Voltage Tester Connection Switch Condition Specified Condition B14-1 (RB) - Body ground Ignition switch ON 11 to 14 V TEXT IN ILLUSTRATION *a Front view of wire harness connector (to Park/Neutral Position Switch) NG --> REPAIR OR REPLACE HARNESS OR CONNECTOR OK: Go to next step
6. INSPECT PARK/NEUTRAL POSITION SWITCH ASSEMBLY Inspect the park/neutral position switch assembly. Refer to «INSPECTION - Step 1»(ref-451170-S08528403632012020700000) . NG --> See step 10 OK: Go to next step
7. CHECK HARNESS AND CONNECTOR (ECM - PARK/NEUTRAL POSITION SWITCH) Disconnect the ECM connector. Turn the ignition switch to ON. Measure the voltage according to the value(s) in the table below. Standard Voltage Tester Connection Condition Specified Condition B30-32 (P) - Body ground Ignition switch ON Shift lever position in P 11 to 14 V B30-33 (R) - Body ground Ignition switch ON Shift lever position in R 11 to 14 V* B30-34 (N) - Body ground Ignition switch ON Shift lever position in N 11 to 14 V B30-30 (D) - Body ground Ignition switch ON Shift lever position in D 11 to 14 V B30-32 (P) - Body ground Ignition switch ON Shift lever position not in P Below 1 V B30-33 (R) - Body ground Ignition switch ON Shift lever position not in R Below 1 V B30-34 (N) - Body ground Ignition switch ON Shift lever position not in N Below 1 V B30-30 (D) - Body ground Ignition switch ON Shift lever position not in D Below 1 V HINT: *: The voltage will drop slightly due to the turning on of the back-up light. TEXT IN ILLUSTRATION *a Front view of wire harness connector (to ECM) NG --> REPAIR OR REPLACE HARNESS OR CONNECTOR OK: Go to next step
8. CHECK HARNESS AND CONNECTOR (ECM - PARK/NEUTRAL POSITION SWITCH) Disconnect the ECM connector. Disconnect the park/neutral position switch connector. Measure the resistance according to the value(s) in the table below. Standard Resistance Tester Connection Condition Specified Condition B30-47 (NSW) - B14-4 (B) Always Below 1 ohms B30-47 (NSW) or B14-4 (B) - Body ground Always 10 kohms or higher NG --> REPAIR OR REPLACE HARNESS OR CONNECTOR OK --> See step 13
9. REPLACE TRANSMISSION CONTROL SWITCH (SHIFT LOCK CONTROL UNIT ASSEMBLY). Refer to «REMOVAL»(ref-451170-S35025316732012020700000)
10. REPLACE PARK/NEUTRAL POSITION SWITCH ASSEMBLY. Refer to «REMOVAL»(ref-451170-S34996445972012020700000)
11. CHECK FOR INTERMITTENT PROBLEMS. Refer to «CHECK FOR INTERMITTENT PROBLEMS»(ref-451061-S02913597072012020700000)
12. REPLACE ECM. Refer to «REMOVAL»(ref-451166-S22630148492012020700000)
13. REPLACE ECM. Refer to «REMOVAL»(ref-451166-S22630148492012020700000)

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

HINT

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

HINT

Read freeze frame data using the Techstream. Freeze frame data records the engine conditions when malfunctions are detected. When troubleshooting, freeze frame data can help determine if the vehicle was moving or stationary, if the engine was warmed up or not, if the air-fuel ratio was lean or rich, and other data from the time the malfunction occurred.

HINT

Read freeze frame data using the Techstream. Freeze frame data records the engine conditions when malfunctions are detected. When troubleshooting, freeze frame data can help determine if the vehicle was moving or stationary, if the engine was warmed up or not, if the air-fuel ratio was lean or rich, and other data from the time the malfunction occurred.

HINT

1. If DTCs relating to different systems which share terminal EIA1 as their ground are stored simultaneously, there may be an open circuit between terminal EIA1 and ground.
2. Read freeze frame data using the Techstream. Freeze frame data records the engine conditions when malfunctions are detected. When troubleshooting, freeze frame data can help determine if the vehicle was moving or stationary, if the engine was warmed up or not, if the air-fuel ratio was lean or rich, and other data from the time the malfunction occurred.

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1. PERFORM ACTIVE TEST USING TECHSTREAM (OPERATE TCV) Connect the Techstream to the DLC3. Turn the ignition switch to ON and turn the Techstream on. Enter the following menus: Powertrain / Engine / Active Test / Control the IAC Duty Ratio / All Data / IAC Sensor Voltage. Check the value of IAC Sensor Voltage while changing Control the IAC Duty Ratio from -100 to 100% (or from 100 to -100%) using the Techstream. OK The value of IAC Sensor Voltage remains between 0.2 and 4.8 V while Control the IAC Duty Ratio is changed from -100 to 100% (or from 100 to -100%). HINT: Control the IAC Duty Ratio Operation IAC Sensor Voltage (Normal) Suspected Failure Area IAC1 circuit shorted VCIA circuit open VCIA and IAC1 circuits short-circuited IAC1 circuit open EIA1 circuit open Sensor malfunction -100% 0.2 to 1.0 V Remains below 0.2 V Remains higher than 4.8 V Other than the voltage in the 2 columns on the left 100% 3.2 to 4.8 V Remains below 0.2 V Remains higher than 4.8 V NG --> See step 3 OK: Go to next step
2. CHECK WHETHER DTC OUTPUT RECURS (DTC P2014, P2016 AND/OR P2017) Connect the Techstream to the DLC3. Turn the ignition switch to ON and turn the Techstream on. Clear the DTCs. Refer to «DTC CHECK / CLEAR»(ref-451061-S23674878372012020700000) . Drive the vehicle in accordance with the driving pattern described in Confirmation Driving Pattern. Read the DTCs. RESULT Result Proceed to P2014, P2016 and/or P2017 is output again A No DTC is output B B --> SYSTEM OK A --> See step 8
3. CHECK HARNESS AND CONNECTOR (INTAKE AIR CONTROL VALVE ACTUATOR - ECM) Disconnect the ECM connector. Disconnect the intake air control valve actuator connector. Measure the resistance according to the value(s) in the table below. Standard Resistance (Check for Open) Tester Connection Condition Specified Condition B30-72 (VCIA) - M2-3 (VDD) Always Below 1 ohms B30-70 (IAC1) - M2-1 (OUT) Always Below 1 ohms B30-71 (EIA1) - M2-2 (GND) Always Below 1 ohms Standard Resistance (Check for Short) Tester Connection Condition Specified Condition B30-72 (VCIA) or M2-3 (VDD) - Body ground Always 10 kohms or higher B30-70 (IAC1) or M2-1 (OUT) - Body ground Always 10 kohms or higher B30-71 (EIA1) or M2-2 (GND) - Body ground Always 10 kohms or higher NG --> REPAIR OR REPLACE HARNESS OR CONNECTOR OK: Go to next step
4. INSPECT ECM (VCIA VOLTAGE) Disconnect the intake air control valve actuator connector. Turn the ignition switch to ON. Measure the voltage according to the value(s) in the table below. Standard Voltage Tester Connection Switch Condition Specified Condition M2-3 (VDD) - Body ground Ignition switch ON 4.5 to 5.0 V TEXT IN ILLUSTRATION *a Front view of wire harness connector (to Intake Air Control Valve Actuator) NG --> See step 7 OK: Go to next step
5. REPLACE INTAKE AIR CONTROL VALVE ACTUATOR (FOR TCV) Replace the intake air control valve actuator (for TCV). Refer to «REMOVAL»(ref-451183-S35750795822012020700000) . NEXT: Go to next step
6. CHECK WHETHER DTC OUTPUT RECURS (DTC P2014, P2016 AND/OR P2017) Connect the Techstream to the DLC3. Turn the ignition switch to ON and turn the Techstream on. Clear the DTCs. Refer to «DTC CHECK / CLEAR»(ref-451061-S23674878372012020700000) . Drive the vehicle in accordance with the driving pattern described in Confirmation Driving Pattern. Read the DTCs. RESULT Result Proceed to P2014, P2016 and/or P2017 is output again A No DTC is output B B --> END A --> See step 9
7. REPLACE ECM. Refer to «REMOVAL»(ref-451166-S22630148492012020700000)
8. REPLACE ECM. Refer to «REMOVAL»(ref-451166-S22630148492012020700000)
9. REPLACE ECM. Refer to «REMOVAL»(ref-451166-S22630148492012020700000)

HINT

1. Read freeze frame data using the Techstream. Freeze frame data records the engine condition when malfunctions are detected. When troubleshooting, freeze frame data can help determine if the vehicle was moving or stationary, if the engine was warmed up or not, if the air-fuel ratio was lean or rich, and other data from the time the malfunction occurred.

1. The throttle actuator current (Throttle Motor Current) and the throttle actuator duty ratio (Throttle Motor Open Duty/Throttle Motor Close Duty) can be read using the Techstream. However, the ECM shuts off the throttle actuator current when the ETCS malfunctions.

HINT

1. Read freeze frame data using the Techstream. Freeze frame data records the engine condition when malfunctions are detected. When troubleshooting, freeze frame data can help determine if the vehicle was moving or stationary, if the engine was warmed up or not, if the air-fuel ratio was lean or rich, and other data from the time the malfunction occurred.
2. Refer to "Data List / Active Test" [Throttle Position Command, Throttle Position No. 1, Throttle Motor Current, Throttle Motor Duty (Open), Throttle Motor Duty (Close)]. Refer to «DATA LIST / ACTIVE TEST»(ref-451061-S12130890322012020700000) .

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

HINT

Read freeze frame data using the Techstream. Freeze frame data records the engine condition when malfunctions are detected. When troubleshooting, freeze frame data can help determine if the vehicle was moving or stationary, if the engine was warmed up or not, if the air-fuel ratio was lean or rich, and other data from the time the malfunction occurred.

HINT

1. Refer to "Data List / Active Test" [Throttle Position Commanded, Throttle Position No. 1, Throttle Motor Current, Throttle Motor Duty (Open) and Throttle Motor Duty (Close)]. Refer to «DATA LIST / ACTIVE TEST»(ref-451061-S12130890322012020700000) .
2. Read freeze frame data using the Techstream. Freeze frame data records the engine condition when malfunctions are detected. When troubleshooting, freeze frame data can help determine if the vehicle was moving or stationary, if the engine was warmed up or not, if the air-fuel ratio was lean or rich, and other data from the time the malfunction occurred.

HINT

1. These DTCs relate to the accelerator pedal position sensor.
2. Read freeze frame data using the Techstream. Freeze frame data records the engine condition when malfunctions are detected. When troubleshooting, freeze frame data can help determine if the vehicle was moving or stationary, if the engine was warmed up or not, if the air-fuel ratio was lean or rich, and other data from the time the malfunction occurred.

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1. READ VALUE USING TECHSTREAM (ACCELERATOR PEDAL POSITION SENSOR) Connect the Techstream to the DLC3. Turn the ignition switch to ON. Turn the Techstream on. Enter the following menus: Powertrain / Engine / Data List / All Data / Accel Sensor Out No. 1 and Accel Sensor Out No. 2. Read the value displayed on the Techstream. Standard Voltage Accelerator Pedal Operation Accel Sensor Out No. 1 Accel Sensor Out No. 2 Difference between Accel Sensor Out No. 1 and Accel Sensor Out No. 2 Released 0.5 to 1.1 V 1.2 to 2.0 V More than 0.02 V Depressed 2.6 to 4.5 V 3.4 to 4.98 V TEXT IN ILLUSTRATION *a Depressed *b Released OK --> See step 5 NG --> See step 2
2. CHECK HARNESS AND CONNECTOR (ACCELERATOR PEDAL POSITION SENSOR - ECM) Disconnect the accelerator pedal position sensor connector. Disconnect the ECM connector. Measure the resistance according to the value(s) in the table below. Standard Resistance Tester Connection Condition Specified Condition A2-6 (VPA) - A35-55 (VPA) Always Below 1 ohms A2-5 (EPA) - A35-59 (EPA) Always Below 1 ohms A2-4 (VCPA) - A35-57 (VCPA) Always Below 1 ohms A2-3 (VPA2) - A35-56 (VPA2) Always Below 1 ohms A2-2 (EPA2) - A35-60 (EPA2) Always Below 1 ohms A2-1 (VCP2) - A35-58 (VCP2) Always Below 1 ohms A2-6 (VPA) or A35-55 (VPA) - Body ground Always 10 kohms or higher A2-5 (EPA) or A35-59 (EPA) - Body ground Always 10 kohms or higher A2-4 (VCPA) or A35-57 (VCPA) - Body ground Always 10 kohms or higher A2-3 (VPA2) or A35-56 (VPA2) - Body ground Always 10 kohms or higher A2-2 (EPA2) or A35-60 (EPA2) - Body ground Always 10 kohms or higher A2-1 (VCP2) or A35-58 (VCP2) - Body ground Always 10 kohms or higher NG --> REPAIR OR REPLACE HARNESS OR CONNECTOR OK: Go to next step
3. INSPECT ECM (VCPA AND VCP2 VOLTAGE) Disconnect the accelerator pedal position sensor connector. Turn the ignition switch to ON. Measure the voltage according to the value(s) in the table below. Standard Voltage Tester Connection Switch Condition Specified Condition A2-4 (VCPA) - A2-5 (EPA) Ignition switch ON 4.5 to 5.5 V A2-1 (VCP2) - A2-2 (EPA2) Ignition switch ON 4.5 to 5.5 V TEXT IN ILLUSTRATION *a Front view of wire harness connector (to Accelerator Pedal Position Sensor Assembly) NG --> See step 6 OK: Go to next step
4. REPLACE ACCELERATOR PEDAL POSITION SENSOR ASSEMBLY Replace the accelerator pedal position sensor assembly. Refer to «REMOVAL»(ref-451166-S40840052852012020700000) . NEXT: Go to next step
5. CHECK WHETHER DTC OUTPUT RECURS (ACCELERATOR PEDAL POSITION SENSOR DTCS) Connect the Techstream to the DLC3. Turn the ignition switch to ON. Turn the Techstream on. Clear the DTCs. Refer to «DTC CHECK / CLEAR»(ref-451061-S23674878372012020700000) . Drive the vehicle in accordance with the driving pattern described in Confirmation Driving Pattern. Read the DTCs. RESULT Result Proceed to P2120, P2122, P2123, P2125, P2127, P2128 and/or P2138 is output A No DTC is output B B --> END A --> See step 7
6. REPLACE ECM. Refer to «REMOVAL»(ref-451166-S22630148492012020700000)
7. REPLACE ECM. Refer to «REMOVAL»(ref-451166-S22630148492012020700000)

HINT

1. This DTC relates to the accelerator pedal position sensor.
2. Read freeze frame data using the Techstream. Freeze frame data records the engine condition when malfunctions are detected. When troubleshooting, freeze frame data can help determine if the vehicle was moving or stationary, if the engine was warmed up or not, if the air-fuel ratio was lean or rich, and other data from the time the malfunction occurred.

HINT

1. Although the DTC titles say oxygen sensor, these DTCs relate to the air fuel ratio sensor.
2. Sensor 1 refers to the sensor mounted in front of the Three-way Catalytic Converter (TWC) and located near the engine assembly.
3. Read freeze frame data using the Techstream. Freeze frame data records the engine condition when malfunctions are detected. When troubleshooting, freeze frame data can help determine if the vehicle was moving or stationary, if the engine was warmed up or not, if the air-fuel ratio was lean or rich, and other data from the time the malfunction occurred.
4. A low air fuel ratio sensor voltage could be caused by a rich air-fuel mixture. Check for conditions that would cause the engine to run rich.
5. A high air fuel ratio sensor voltage could be caused by a lean air-fuel mixture. Check for conditions that would cause the engine to run lean.
6. Sensor 1 refers to the sensor closest to the engine assembly.
7. Sensor 2 refers to the sensor farthest away from the engine assembly.

HINT

1. Read freeze frame data using the Techstream. Freeze frame data records the engine condition when malfunctions are detected. When troubleshooting, freeze frame data can help determine if the vehicle was moving or stationary, if the engine was warmed up or not, if the air-fuel ratio was lean or rich, and other data from the time the malfunction occurred.
2. Refer to A/F Sensor Determination (worst value) #1, Engine Speed Fluctuation Avg (worst value) #1 to #4, Cylinder #1 to #4 Misfire Count, Short FT #1 and Long FT #1 in the Data List / Active Test. Refer to «DATA LIST / ACTIVE TEST»(ref-451061-S12130890322012020700000) .

HINT

1. Refer to "Data List / Active Test" [AFS Voltage B1S1]. Refer to «DATA LIST / ACTIVE TEST»(ref-451061-S12130890322012020700000) .
2. Read freeze frame data using the Techstream. Freeze frame data records the engine condition when malfunctions are detected. When troubleshooting, freeze frame data can help determine if the vehicle was moving or stationary, if the engine was warmed up or not, if the air-fuel ratio was lean or rich, and other data from the time the malfunction occurred.
3. Sensor 1 refers to the sensor closest to the engine assembly.
4. Sensor 2 refers to the sensor farthest away from the engine assembly.

DTC SUMMARY

HINT

The vent valve is built into the canister pump module.

Refer to EVAP System. Refer to INSPECTION PROCEDURE .

HINT

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

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

HINT

1. Using the Techstream monitor results enables the EVAP (Evaporative Emission) system to be checked.
2. Read freeze frame data using the Techstream. Freeze frame data records the engine condition when malfunctions are detected. When troubleshooting, freeze frame data can help determine if the vehicle was moving or stationary, if the engine was warmed up or not, if the air-fuel ratio was lean or rich, and other data from the time the malfunction occurred.

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1. CONFIRM DTC Turn the ignition switch off and wait for 10 seconds. Turn the ignition switch to ON. Turn the ignition switch off and wait for 10 seconds. Connect the Techstream to the DLC3. Turn the ignition switch to ON. Turn the Techstream on. Enter the following menus: Powertrain / Engine / Trouble Codes. Confirm DTCs and freeze frame data. If any EVAP system DTCs are stored, the malfunctioning area can be determined using the table below. NOTE: If the reference pressure difference between the first and second checks is more than the specification, all the DTCs relating to the reference pressure (P043E, P043F, P2401, P2402 and P2419) are stored. NEXT: Go to next step
2. PERFORM EVAP SYSTEM CHECK (AUTO OPERATION) NOTE: The Evaporative System Check (Automatic Mode) consists of 5 steps performed automatically by the Techstream. It takes a maximum of approximately 23 minutes. Do not perform the Evaporative System Check when the fuel tank is more than 90% full because the cut-off valve may be closed. If the cut-off valve is closed, the fuel tank leak check is not possible. Do not run the engine during this operation. When the temperature of the fuel is 35°C (95°F) or higher, a large amount of vapor forms and any check results become inaccurate. When performing the Evaporative System Check, keep the temperature below 35°C (95°F). Clear the DTCs. Refer to «DTC CHECK / CLEAR»(ref-451061-S23674878372012020700000) . Enter the following menus: Powertrain / Engine / Utility / Evaporative System Check / Automatic Mode. After the Evaporative System Check is completed, check for pending DTCs by entering the following menus: Powertrain / Engine / Trouble Codes / Pending. HINT: If no pending DTCs are displayed, perform Monitor Confirmation (see "Diagnostic Help" menu). After this confirmation, check for pending DTCs. If no DTCs are displayed, the EVAP system is normal. NEXT: Go to next step
3. PERFORM EVAP SYSTEM CHECK (MANUAL OPERATION) NOTE: In the Evaporative System Check (Manual Mode), perform the series of 5 Evaporative System Check steps manually using the Techstream. Do not perform the Evaporative System Check when the fuel tank is more than 90% full because the cut-off valve may be closed. If the cut-off valve is closed, the fuel tank leak check is not possible. Do not run the engine during this operation. When the temperature of the fuel is 35°C (95°F) or higher, a large amount of vapor forms and any check results become inaccurate. When performing the Evaporative System Check, keep the temperature below 35°C (95°F). Clear the DTCs. Refer to «DTC CHECK / CLEAR»(ref-451061-S23674878372012020700000) . Enter the following menus: Powertrain / Engine / Utility / Evaporative System Check / Manual Mode. NEXT: Go to next step
4. PERFORM EVAP SYSTEM CHECK (STEP 1/5) Check the EVAP pressure in step 1/5. RESULT DTC No.* Result Trouble Area Proceed to - Virtually no variation in EVAP pressure Not yet determined A P0451 EVAP pressure fluctuates by +/-0.3 kPa-g (+/-2.25 mmHg-g) or more Canister pressure sensor noise B *: These DTCs are already stored in the ECM when the vehicle arrives and are confirmed in the "Confirm DTC" procedure above. B --> See step 29 A: Go to next step
5. PERFORM EVAP SYSTEM CHECK (STEP 1/5 TO 2/5) Check the EVAP pressure in steps 1/5 and 2/5. RESULT DTC No.* Result Trouble Area Proceed to - Virtually no variation in EVAP pressure during step 1/5, and then decreases to reference pressure. Not yet determined A P2402 Small difference between EVAP pressures during steps 1/5 and 2/5 Leak detection pump stuck ON B *: These DTCs are already stored in the ECM when the vehicle arrives and are confirmed in the "Confirm DTC" procedure above. HINT: The value determined in step 2/5 is the first reference pressure. B --> See step 22 A: Go to next step
6. PERFORM EVAP SYSTEM CHECK (STEP 2/5) HINT: Make a note of the pressures checked in steps (a) and (b) below. (a) Check the EVAP pressure 4 seconds after the leak detection pump is activated.* *: The leak detection pump begins to operate as step 1/5 finishes and step 2/5 starts. (b) Check the EVAP pressure again when it has stabilized. This pressure is the reference pressure. RESULT DTC No.* Result Trouble Area Proceed to - EVAP pressure in step (b) between -4.85 kPa-g and -1.057 kPa-g (-36.4 mmHg-g and -7.93 mmHg-g) Not yet determined A P043F and P2401 EVAP pressure in step (b) -1.057 kPa-g (-7.93 mmHg-g) or higher Reference orifice high flow Leak detection pump stuck OFF B P043E EVAP pressure in step (b) below -4.85 kPa-g (-36.4 mmHg-g) Reference orifice clogged C P2419 EVAP pressure in step (a) higher than -0.25 kPa-g (-1.88 mmHg-g) Vent valve stuck closed D *: These DTCs are already stored in the ECM when the vehicle arrives and are confirmed in the "Confirm DTC" procedure above. B --> See step 11 C --> See step 29 D --> See step 20 A: Go to next step
7. PERFORM EVAP SYSTEM CHECK (STEP 2/5 TO 3/5) Check the EVAP pressure increase in step 3/5. RESULT DTC No.* Result Trouble Area Proceed to - EVAP pressure increases by 0.3 kPa-g (2.25 mmHg-g) or more within 10 seconds of proceeding from step 2/5 to step 3/5 Not yet determined A P2420 No variation in EVAP pressure despite proceeding from step 2/5 to step 3/5 Vent valve stuck open (vent) B P0451 No variation in EVAP pressure during steps 1/5 through 3/5 Canister pressure sensor output value stuck C *: These DTCs are already stored in the ECM when the vehicle arrives and are confirmed in the "Confirm DTC" procedure above. B --> See step 19 C --> See step 29 A: Go to next step
8. PERFORM EVAP SYSTEM CHECK (STEP 3/5) Wait until the EVAP pressure change is less than 0.1 kPa-g (0.75 mmHg-g) in 30 seconds. Measure the EVAP pressure and record it. HINT: A few minutes are required for the EVAP pressure to become stable. When there is little fuel in the fuel tank, it takes up to 15 minutes. NEXT: Go to next step
9. PERFORM EVAP SYSTEM CHECK (STEP 4/5) Check the EVAP pressure in step 4/5. RESULT DTC No.* Result Trouble Area Proceed to - EVAP pressure increases by 0.3 kPa-g (2.25 mmHg-g) or more within 10 seconds of proceeding from step 3/5 to step 4/5 Not yet determined A P0441 EVAP pressure increases by 0.3 kPa-g (2.25 mmHg-g) or more within 10 seconds of proceeding from step 3/5 to step 4/5 Problems in purge line between purge VSV and intake manifold B P0441 Variation in EVAP pressure less than 0.3 kPa-g (2.25 mmHg-g) for 10 seconds after proceeding from step 3/5 to step 4/5 Purge VSV stuck closed C *: These DTCs are already stored in the ECM when the vehicle arrives and are confirmed in the "Confirm DTC" procedure above. B --> See step 15 C --> See step 12 A: Go to next step
10. PERFORM EVAP SYSTEM CHECK (STEP 5/5) Check the EVAP pressure in step 5/5. Compare the EVAP pressure in step 3/5 and the second reference pressure (step 5/5). RESULT DTC No.* Result Trouble Area Proceed to - EVAP pressure (step 3/5) below second reference pressure (step 5/5) Not yet determined (no leak from EVAP system) A P0441 and P0455 EVAP pressure (step 3/5) higher than [second reference pressure (step 5/5) x 0.2] Purge VSV stuck open EVAP gross leak B P0456 EVAP pressure (step 3/5) higher than second reference pressure (step 5/5) EVAP small leak B *: These DTCs are already stored in the ECM when the vehicle arrives and are confirmed in the "Confirm DTC" procedure above. A --> See step 35 B --> See step 12
11. PERFORM EVAP SYSTEM CHECK (STEP 3/5) Check the EVAP pressure in step 3/5. RESULT DTC No.* Result Trouble Area Proceed to P043F EVAP pressure less than reference pressure measured in step 2/5 Reference orifice high-flow A P2401 EVAP pressure almost same as reference pressure measured in step 2/5 Leak detection pump stuck OFF B *: These DTCs are already stored in the ECM when the vehicle arrives and are confirmed in the "Confirm DTC" procedure above. HINT: The first reference pressure is the value determined in step 2/5. A --> See step 29 B --> See step 22
12. PERFORM ACTIVE TEST USING TECHSTREAM (PURGE VSV) Enter the following menus: Powertrain / Engine / Active Test / Activate the VSV for EVAP Control. Disconnect the hose (connected to the canister) from the purge VSV. Start the engine. Using the Techstream, turn off the purge VSV (Activate the VSV for EVAP Control: OFF). Use your finger to confirm that the purge VSV has no suction. Using the Techstream, turn on the purge VSV (Activate the VSV for EVAP Control: ON). Use your finger to confirm that the purge VSV has suction. RESULT Result Trouble Area Proceed to No suction when purge VSV turned OFF, and suction applied when turned ON Purge VSV normal A Suction applied when purge VSV turned OFF Purge VSV stuck open B No suction when purge VSV turned ON Purge VSV stuck closed Problems with purge line between purge VSV and intake manifold C TEXT IN ILLUSTRATION *1 Purge VSV *2 Hose (to Canister) B --> See step 14 C --> See step 15 A: Go to next step
13. CHECK FUEL TANK CAP ASSEMBLY Check that the fuel tank cap is correctly installed and confirm that the fuel tank cap meets OEM specifications. Tighten the fuel tank cap firmly (only one click sound is heard). HINT: If an EVAP tester is available, check the fuel tank cap using the Techstream. Remove the fuel tank cap and install it to a fuel tank cap adapter. Connect an EVAP tester pump hose to the adapter and pressurize the cap to 3.2 to 3.7 kPa (24 to 28 mmHg) using an EVAP tester pump. Seal the adapter and wait for 2 minutes. Check the pressure. If the pressure is 2 kPa (15 mmHg) or higher, the fuel tank cap is normal. RESULT Result Trouble Area Proceed to Fuel tank cap correctly installed - A Fuel tank cap loose Fuel tank cap improperly installed Defective fuel tank cap Fuel tank cap does not meet OEM specifications B Defective fuel tank cap - B No fuel tank cap - C A --> See step 28 B --> See step 26 C --> See step 27
14. INSPECT PURGE VSV Turn the ignition switch off. Disconnect the purge VSV connector. Disconnect the hose (connected to the canister) from the purge VSV. Start the engine. Use your finger to confirm that the purge VSV has no suction. RESULT Result Trouble Area Proceed to No suction ECM A Suction applied Purge VSV B TEXT IN ILLUSTRATION *1 Purge VSV *2 Hose (to Canister) A --> See step 34 B --> See step 30
15. CHECK PURGE LINE (PURGE VSV - INTAKE MANIFOLD) Disconnect the hose (connected to the intake manifold) from the purge VSV. Start the engine. Use your finger to confirm that the hose has suction. RESULT Result Trouble Area Proceed to Suction applied Purge line between purge VSV and intake manifold normal A No suction Intake manifold port Purge line between purge VSV and intake manifold B TEXT IN ILLUSTRATION *1 Purge VSV *2 Hose (to Intake Manifold) B --> See step 25 A: Go to next step
16. INSPECT PURGE VSV Remove the purge VSV. Refer to «REMOVAL»(ref-451182-S28073004882012020700000) . Apply battery voltage to the terminals of the purge VSV. Using an air gun, confirm that air flows from port A to port B. RESULT Result Trouble Area Proceed to Air flows - A No airflow Purge VSV B B --> See step 30 A: Go to next step
17. CHECK HARNESS AND CONNECTOR (POWER SOURCE OF PURGE VSV) Disconnect the purge VSV connector. Turn the ignition switch to ON. Measure the voltage according to the value(s) in the table below. RESULT Tester Connection Switch Condition Specified Condition Trouble Area Proceed to B18-1 - Body ground Ignition switch ON 11 to 14 V Normal A Ignition switch ON Other than condition above Wire harness or connectors between purge VSV and battery B TEXT IN ILLUSTRATION *a Front view of wire harness connector (to Purge VSV) B --> See step 31 A: Go to next step
18. CHECK HARNESS AND CONNECTOR (PURGE VSV - ECM) Disconnect the ECM connector. Disconnect the purge VSV connector. Measure the resistance according to the value(s) in the table below. Standard Resistance Tester Connection Condition Specified Condition B30-28 (PRG) - B18-2 Always Below 1 ohms B30-28 (PRG) - Body ground Always 10 kohms or higher B18-1 - Body ground Always 10 kohms or higher OK --> See step 34 NG --> See step 31
19. INSPECT CANISTER PUMP MODULE (POWER SOURCE FOR VENT VALVE) Turn the ignition switch off. Disconnect the canister pump module connector. Turn the ignition switch to ON. Measure the voltage according to the value(s) in the table below. RESULT Tester Connection Switch Condition Specified Condition Trouble Area Proceed to H20-5 (VLVB) - Body ground Ignition switch ON 11 to 14 V Wire harness between vent valve and ECM Vent valve ECM A Ignition switch ON Below 3 V Power source wire harness of vent valve B TEXT IN ILLUSTRATION *a Front view of wire harness connector (to Canister Pump Module) B --> See step 31 A: Go to next step
20. INSPECT CANISTER PUMP MODULE (VENT VALVE OPERATION) Turn the ignition switch off. Disconnect the canister pump module connector. Apply battery voltage to terminals 5 (VLVB) and 1 (VGND) of the canister pump module. Touch the canister pump module to confirm the vent valve operation. RESULT Result Trouble Area Proceed to Operating 1. Wire harness between vent valve and ECM 2. ECM A Not operating Vent valve B TEXT IN ILLUSTRATION *1 Component without harness connected (Canister) B --> See step 29 A: Go to next step
21. CHECK HARNESS AND CONNECTOR (ECM - CANISTER PUMP MODULE) Disconnect the ECM connector. Disconnect the canister pump module connector. Measure the resistance according to the value(s) in the table below. RESULT Tester Connection Condition Specified Condition Trouble Area Proceed to A35-42 (VPMP) - H20-1 (VGND) Always Below 1 ohms ECM A Always 10 kohms or higher Wire harness between ECM and canister pump module B A --> See step 34 B --> See step 31
22. PERFORM ACTIVE TEST USING TECHSTREAM (VACUUM PUMP (ALONE)) Turn the ignition switch off. Disconnect the canister pump module connector. Turn the ignition switch to ON. Enter the following menus: Powertrain / Engine / Active Test / Activate the Vacuum Pump. Measure the voltage according to the value(s) in the table below. RESULT Tester Connection Condition Specified Condition Trouble Area Proceed to H20-3 (MTRB) - Body ground Leak detection pump is turned ON and OFF using the Techstream Below 3 V when OFF 9 to 14 V when ON Wire harness between leak detection pump and body ground Leak detection pump A Below 3 V when OFF and ON Wire harness between leak detection pump and ECM ECM B 11 to 14 V when OFF and ON ECM C TEXT IN ILLUSTRATION *a Front view of wire harness connector (to Canister Pump Module) B --> See step 24 C --> See step 34 A: Go to next step
23. CHECK HARNESS AND CONNECTOR (CANISTER PUMP MODULE - BODY GROUND) Turn the ignition switch off. Disconnect the canister pump module connector. Measure the resistance according to the value(s) in the table below. RESULT Tester Connection Condition Specified Condition Trouble Area Proceed to H20-4 (MGND) - Body ground Always Below 1 ohms Leak detection pump A Always 10 kohms or higher Wire harness between canister pump module and body ground B A --> See step 29 B --> See step 31
24. CHECK HARNESS AND CONNECTOR (ECM - CANISTER PUMP MODULE) Turn the ignition switch off. Disconnect the canister pump module connector. Disconnect the ECM connector. Measure the resistance according to the value(s) in the table below. RESULT Tester Connection Condition Specified Condition Trouble Area Proceed to A35-34 (MPMP) - H20-3 (MTRB) Always Below 1 ohms ECM A Always 10 kohms or higher Wire harness between ECM and canister pump module B A --> See step 34 B --> See step 31
25. INSPECT INTAKE MANIFOLD (EVAP PURGE PORT) Stop the engine. Disconnect the purge line from the intake manifold. Start the engine. Use your finger to confirm that the port of the intake manifold has suction. RESULT Result Trouble Area Proceed to Suction applied Purge line between intake manifold and purge VSV A No suction Intake manifold B Reconnect the purge line. A --> See step 32 B --> See step 33
26. CORRECTLY REINSTALL OR REPLACE FUEL TANK CAP ASSEMBLY HINT: When reinstalling the fuel tank cap, tighten it until a click sound is heard. When replacing the fuel tank cap, use a fuel tank cap that meets OEM specifications, and tighten it until a click sound is heard. NEXT --> See step 36
27. REPLACE FUEL TANK CAP ASSEMBLY HINT: When replacing the fuel cap, use a fuel cap that meets OEM specifications, and tighten it until a click sound is heard. NEXT --> See step 36
28. LOCATE EVAP LEAK PART TEXT IN ILLUSTRATION *1 Vent Hose (to Canister Filter) *2 Canister Pump Module *3 EVAP Tester *4 Adapter *a Disconnect the Vent Hose - - Disconnect the vent hose. Connect an EVAP tester to the canister pump module with an adapter. Pressurize the EVAP system to 3.2 to 3.7 kPa (24 to 28 mmHg). Apply soapy water to the piping and connecting parts of the EVAP system. Look for areas where bubbles appear. This indicates the leak point. Repair or replace the leak point. HINT: Disconnect the hose between the canister and fuel tank from the canister. Block the canister side and conduct an inspection. This way, the fuel tank can be excluded as an area suspected of causing fuel leaks. NEXT --> See step 36
29. REPLACE CANISTER Replace the canister. Refer to «REMOVAL»(ref-451182-S29111003172012020700000) . 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 Fuel Tank *5 Canister - - *a Inspection Area (check for disconnection and/or cracks) - - NEXT --> See step 36
30. REPLACE PURGE VSV Replace the purge VSV. Refer to «REMOVAL»(ref-451182-S28073004882012020700000) . NEXT --> See step 36
31. REPAIR OR REPLACE HARNESS OR CONNECTOR NEXT --> See step 36
32. REPLACE PURGE LINE (INTAKE MANIFOLD - PURGE VSV) NEXT --> See step 36
33. INSPECT INTAKE MANIFOLD (EVAP PURGE PORT) Check that the EVAP purge port of the intake manifold is not clogged. If necessary, replace the intake manifold. NEXT --> See step 36
34. REPLACE ECM Replace the ECM. Refer to «REMOVAL»(ref-451166-S22630148492012020700000) . NEXT --> See step 36
35. REPAIR OR REPLACE PARTS AND COMPONENTS INDICATED BY OUTPUT DTCS Repair the malfunctioning areas indicated by the DTCs that were confirmed when the vehicle was brought in. NEXT: Go to next step
36. PERFORM EVAP SYSTEM CHECK (AUTO OPERATION) NOTE: The Evaporative System Check (Automatic Mode) consists of 5 steps performed automatically by the Techstream. It takes a maximum of approximately 23 minutes. Do not perform the Evaporative System Check when the fuel tank is more than 90% full because the cut-off valve may be closed. If the cut-off valve is closed, the fuel tank leak check is not possible. Do not run the engine in this step. When the temperature of the fuel is 35°C (95°F) or higher, a large amount of vapor forms and any check results become inaccurate. When performing an Evaporative System Check, keep the temperature below 35°C (95°F). Clear the DTCs. Refer to «DTC CHECK / CLEAR»(ref-451061-S23674878372012020700000) . Enter the following menus: Powertrain / Engine / Utility / Evaporative System Check / Automatic Mode. After the Evaporative System Check is completed, check for pending DTCs by entering the following menus: Powertrain / Engine / Trouble Codes / Pending. HINT: If no pending DTCs are output, the repair has been successfully completed. NEXT --> END

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

Scheme 145

Scheme 146

1. CHECK INTEGRATION RELAY (POWER SOURCE) Remove the integration relay from the engine room relay block. Measure the voltage according to the value(s) in the table below. Standard Voltage Tester Connection Condition Specified Condition 1C-1 - Body ground Always 11 to 14 V TEXT IN ILLUSTRATION *a Front view of wire harness connector (to Integration Relay) NG --> REPAIR OR REPLACE HARNESS OR CONNECTOR (INTEGRATION RELAY - BATTERY) OK: Go to next step
2. INSPECT INTEGRATION RELAY (EFI NO. 1) Inspect the integration relay (EFI NO. 1). Refer to «ON-VEHICLE INSPECTION - Step 2»(ref-451166-S21973643612012020700000) . NG --> REPLACE INTEGRATION RELAY OK: Go to next step
3. CHECK HARNESS AND CONNECTOR (INTEGRATION RELAY - ECM, BODY GROUND) Check the harness and connectors between the integration relay and ECM. Remove the integration relay from the engine room relay block. 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 A35-6 (MREL) - 1B-2 Always Below 1 ohms A35-2 (+B) - 1B-4 Always Below 1 ohms A35-1 (+B2) - 1B-4 Always Below 1 ohms Standard Resistance (Check for Short) Tester Connection Condition Specified Condition A35-6 (MREL) or 1B-2 - Body ground Always 10 kohms or higher A35-2 (+B) or 1B-4 - Body ground Always 10 kohms or higher A35-1 (+B2) or 1B-4 - Body ground Always 10 kohms or higher Check the harness and connectors between the integration relay and body ground. Measure the resistance according to the value(s) in the table below. Standard Resistance (Check for Open) Tester Connection Condition Specified Condition 1B-3 - Body ground Always Below 1 ohms NG --> REPAIR OR REPLACE HARNESS OR CONNECTOR OK: Go to next step
4. CHECK HARNESS AND CONNECTOR (ECM - BODY GROUND) Disconnect the ECM connector. Measure the resistance according to the value(s) in the table below. Standard Resistance (Check for Open) Tester Connection Condition Specified Condition B30-104 (E1) - Body ground Always Below 1 ohms NG --> REPAIR OR REPLACE HARNESS OR CONNECTOR OK: Go to next step
5. INSPECT ECM (IGSW VOLTAGE) Disconnect the ECM connectors. Turn the ignition switch to ON. Measure the voltage according to the value(s) in the table below. Standard Voltage Tester Connection Switch Condition Specified Condition A35-28 (IGSW) - B30-104 (E1) Ignition switch ON 11 to 14 V TEXT IN ILLUSTRATION *a Front view of wire harness connector (to ECM) NG --> See step 6 OK --> See step 13
6. INSPECT INTEGRATION RELAY (IG2) Inspect the integration relay (IG2). Refer to «ON-VEHICLE INSPECTION - Step 1»(ref-451166-S21973643612012020700000) . NG --> REPLACE INTEGRATION RELAY OK: Go to next step
7. CHECK HARNESS AND CONNECTOR (INTEGRATION RELAY - ECM) Remove the integration relay from the engine room relay block. 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 1A-4 - A35-28 (IGSW) Always Below 1 ohms Standard Resistance (Check for Short) Tester Connection Condition Specified Condition 1A-4 or A35-28 (IGSW) - Body ground Always 10 kohms or higher RESULT Result Proceed to Out of normal range A Within normal range B B --> See step 8 A --> REPAIR OR REPLACE HARNESS OR CONNECTOR
8. CHECK IF VEHICLE IS EQUIPPED WITH SMART KEY SYSTEM Confirm the vehicle specifications. RESULT Result Proceed to w/ Smart Key System A w/o Smart Key System B B --> See step 10 A: Go to next step
9. CHECK HARNESS AND CONNECTOR (INTEGRATION RELAY - POWER MANAGEMENT CONTROL ECU) Remove the integration relay from the engine room relay block. Disconnect the power management control ECU connector. Measure the resistance according to the value(s) in the table below. Standard Resistance (Check for Open) Tester Connection Condition Specified Condition 1A-2 - C42-8 (IG2D) Always Below 1 ohms 1A-3 - Body ground Always Below 1 ohms Standard Resistance (Check for Short) Tester Connection Condition Specified Condition 1A-2 or C42-8 (IG2D) - Body ground Always 10 kohms or higher NG --> REPAIR OR REPLACE HARNESS OR CONNECTOR OK --> See step 14
10. CHECK HARNESS AND CONNECTOR (INTEGRATION RELAY - IGNITION SWITCH ASSEMBLY) Remove the integration relay from the engine room relay block. Disconnect the ignition switch connector. Measure the resistance according to the value(s) in the table below. Standard Resistance (Check for Open) Tester Connection Condition Specified Condition 1A-2 - C5-6 (IG2) Always Below 1 ohms 1A-3 - Body ground Always Below 1 ohms Standard Resistance (Check for Short) Tester Connection Condition Specified Condition 1A-2 or C5-6 (IG2) - Body ground Always 10 kohms or higher NG --> REPAIR OR REPLACE HARNESS OR CONNECTOR OK: Go to next step
11. INSPECT IGNITION SWITCH ASSEMBLY Inspect the ignition switch assembly. Refer to «INSPECTION»(ref-451175-S03545745922012020700000) . NG --> See step 12 OK --> REPAIR OR REPLACE HARNESS OR CONNECTOR (IGNITION SWITCH - BATTERY)
12. REPLACE IGNITION SWITCH ASSEMBLY. Refer to «REMOVAL»(ref-451175-S04977620142012020700000)
13. REPLACE ECM. Refer to «REMOVAL»(ref-451166-S22630148492012020700000)
14. CHECK SMART KEY SYSTEM. Refer to «HOW TO PROCEED WITH TROUBLESHOOTING»(ref-451056-S26769048902012020700000)

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

Scheme 147

1. PERFORM ACTIVE TEST USING TECHSTREAM (CONTROL THE FUEL PUMP / SPEED) Connect the Techstream to the DLC3. Turn the ignition switch to ON and 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. OK Fuel pump operating sound occurs. NG --> See step 4 OK: Go to next step
2. READ VALUE USING TECHSTREAM (STARTER SIGNAL) Connect the Techstream to the DLC3. Turn the ignition switch to ON and turn the Techstream on. Enter the following menus: Powertrain / Engine / Data List / Starter Signal. Check the result when the ignition switch is turned to ON and START. OK Ignition Switch Position Starter Signal ON Close (Starter signal OFF) START Open (Starter signal ON) NG --> REPAIR OR REPLACE STARTING SYSTEM OK: Go to next step
3. READ VALUE USING TECHSTREAM (ENGINE SPEED) Connect the Techstream to the DLC3. Turn the ignition switch to ON and turn the Techstream on. Enter the following menus: Powertrain / Engine / Data List / Engine Speed. Read the values displayed on the Techstream while cranking the engine. OK Values are displayed continuously. NG --> REPAIR OR REPLACE CRANKSHAFT POSITION SENSOR CIRCUIT OK --> See step 12
4. CHECK INSTRUMENT PANEL JUNCTION BLOCK (C/OPN RELAY INPUT VOLTAGE) Measure the voltage according to the value(s) in the table below. Standard Voltage Tester Connection Switch Condition Specified Condition 2B-2 - Body ground Ignition switch off Below 1 V 2B-5 - Body ground 2B-2 - Body ground Ignition switch ON 11 to 14 V 2B-5 - Body ground TEXT IN ILLUSTRATION *a Component with harness connected (Instrument Panel Junction Block) NG --> See step 9 OK: Go to next step
5. INSPECT INSTRUMENT PANEL JUNCTION BLOCK (C/OPN RELAY) Inspect the instrument panel junction block (C/OPN relay). Refer to «ON-VEHICLE INSPECTION - Step 4»(ref-451166-S21973643612012020700000) . NG --> REPLACE INSTRUMENT PANEL JUNCTION BLOCK OK: Go to next step
6. CHECK HARNESS AND CONNECTOR (INSTRUMENT PANEL JUNCTION BLOCK - ECM) Disconnect the ECM connector. Disconnect the instrument panel junction block connector. Measure the resistance according to the value(s) in the table below. Standard Resistance (Check for Open) Tester Connection Condition Specified Condition 2B-12 - A35-8 (FC) Always Below 1 ohms Standard Resistance (Check for Short) Tester Connection Condition Specified Condition 2B-12 or A35-8 (FC) - Body ground Always 10 kohms or higher NG --> REPAIR OR REPLACE HARNESS OR CONNECTOR OK: Go to next step
7. CHECK HARNESS AND CONNECTOR (C/OPN RELAY - FUEL PUMP - BODY GROUND) Check the harness and connectors between the instrument panel junction block and fuel pump. Disconnect the instrument panel junction block connector. Disconnect the fuel pump connector. Measure the resistance according to the value(s) in the table below. Standard Resistance (Check for Open) Tester Connection Condition Specified Condition 2A-13 - H12-4 Always Below 1 ohms Standard Resistance (Check for Short) Tester Connection Condition Specified Condition 2A-13 or H12-4 - Body ground Always 10 kohms or higher Check the harness and connectors between the fuel pump and body ground. Disconnect the fuel pump connector. Measure the resistance according to the value(s) in the table below. Standard Resistance (Check for Open) Tester Connection Condition Specified Condition Fuel pump (H12-5) - Body ground Always Below 1 ohms NG --> REPAIR OR REPLACE HARNESS OR CONNECTOR OK: Go to next step
8. INSPECT FUEL PUMP Inspect the fuel pump. Refer to «INSPECTION»(ref-451178-S36242793572012020700000) . NG --> See step 11 OK --> See step 13
9. INSPECT INTEGRATION RELAY (EFI NO. 2) Inspect the integration relay (EFI NO. 2). Refer to «ON-VEHICLE INSPECTION - Step 3»(ref-451166-S21973643612012020700000) . NG --> REPLACE INTEGRATION RELAY OK: Go to next step
10. CHECK HARNESS AND CONNECTOR (INSTRUMENT PANEL JUNCTION BLOCK - INTEGRATION RELAY) Remove the integration relay from the engine room relay block. Disconnect the instrument panel junction block connectors. Measure the resistance according to the value(s) in the table below. Standard Resistance (Check for Open) Tester Connection Condition Specified Condition 1A-4 - 2B-5 Always Below 1 ohms 2B-2 - 1B-8 Always Below 1 ohms 1B-6 - 1B-4 Always Below 1 ohms 1B-7 - Body ground Always Below 1 ohms Standard Resistance (Check for Short) Tester Connection Condition Specified Condition 1A-4 or 2B-5 - Body ground Always 10 kohms or higher 2B-2 or 1B-8 - Body ground Always 10 kohms or higher 1B-6 or 1B-4 - Body ground Always 10 kohms or higher NG --> REPAIR OR REPLACE HARNESS OR CONNECTOR OK --> See step 14
11. REPLACE FUEL PUMP. Refer to «REMOVAL»(ref-451178-S42865735842012020700000)
12. REPLACE ECM. Refer to «REMOVAL»(ref-451166-S22630148492012020700000)
13. REPLACE ECM. Refer to «REMOVAL»(ref-451166-S22630148492012020700000)
14. GO TO ECM POWER SOURCE CIRCUIT. Refer to «ECM Power Source Circuit»(ref-451172-S01002187532012020700000)

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

Scheme 148

1. INSPECT FUEL INJECTOR ASSEMBLY (POWER SOURCE) Disconnect the fuel injector connector. Turn the ignition switch to ON. Measure the voltage according to the value(s) in the table below. Standard Voltage Cylinder Tester Connection Switch Condition Specified Condition No. 1 B10-1 - Ground Ignition switch ON 11 to 14 V No. 2 B11-1 - Ground Ignition switch ON 11 to 14 V No. 3 B12-1 - Ground Ignition switch ON 11 to 14 V No. 4 B13-1 - Ground Ignition switch ON 11 to 14 V TEXT IN ILLUSTRATION *a Front view of wire harness connector (to Fuel Injector Assembly) NG --> See step 4 OK: Go to next step
2. INSPECT FUEL INJECTOR ASSEMBLY Inspect the fuel injector assembly. Refer to «INSPECTION»(ref-451178-S05227766732012020700000) . NG --> See step 5 OK: Go to next step
3. CHECK HARNESS AND CONNECTOR (FUEL INJECTOR - ECM) Disconnect the fuel injector connector. Disconnect the ECM connector. Measure the resistance according to the value(s) in the table below. Standard Resistance Cylinder Tester Connection Condition Specified Condition No. 1 B10-2 - Body ground Always 10 kohms or higher B10-2 - B30-85 (#10) Always Below 1 ohms No. 2 B11-2 - Ground Always 10 kohms or higher B11-2 - B30-84 (#20) Always Below 1 ohms No. 3 B12-2 - Ground Always 10 kohms or higher B12-2 - B30-83 (#30) Always Below 1 ohms No. 4 B13-2 - Ground Always 10 kohms or higher B13-2 - B30-82 (#40) Always Below 1 ohms NG --> REPAIR OR REPLACE HARNESS OR CONNECTOR OK --> See step 6
4. INSPECT INTEGRATION RELAY (IG2) Inspect the integration relay (IG2). Refer to «ON-VEHICLE INSPECTION - Step 1»(ref-451166-S21973643612012020700000) . NG --> REPLACE INTEGRATION RELAY OK --> REPAIR OR REPLACE HARNESS OR CONNECTOR (INTEGRATION RELAY - FUEL INJECTOR)
5. REPLACE FUEL INJECTOR ASSEMBLY. Refer to «REMOVAL»(ref-451178-S20746300762012020700000)
6. REPLACE ECM. Refer to «REMOVAL»(ref-451166-S22630148492012020700000)

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

HINT

This inspection procedure is based on the premise that the engine can crank normally. If the engine cannot crank normally, proceed to the problem symptoms table. Refer to PROBLEM SYMPTOMS TABLE .

Scheme 149

Scheme 150

1. CHECK IF VEHICLE IS EQUIPPED WITH SMART KEY SYSTEM Confirm the vehicle specifications. RESULT Result Proceed to w/o Smart Key System A w/ Smart Key System B B --> See step 14 A: Go to next step
2. READ VALUE USING TECHSTREAM (STARTER SIGNAL) Connect the Techstream to the DLC3. Turn the ignition switch to ON. Turn the Techstream on. Enter the following menus: Powertrain / Engine / Data List / Starter Signal. Read the value. OK Ignition Switch Position Starter Signal ON Close (Starter signal OFF) START Open (Starter signal ON) NG --> See step 3 OK --> See step 25
3. CHECK ST RELAY (POWER SOURCE) Remove the ST relay from the No. 3 relay block. Measure the voltage according to the value(s) in the table below. Standard Voltage Tester Connection Condition Specified Condition ST relay terminal 2 - Body ground Engine cranking 11 to 14 V HINT: The engine does not crank because the relay is not installed. RESULT Result Proceed to OK A NG (for Manual Transaxle) B NG (for Automatic Transaxle) C TEXT IN ILLUSTRATION *1 No. 3 Relay Block *2 ST Relay B --> See step 6 C --> See step 10 A: Go to next step
4. INSPECT ST RELAY Inspect the starter relay (ST). Refer to «ON-VEHICLE INSPECTION - Step 1»(ref-451175-S29754059082012020700000) . NG --> REPLACE ST RELAY OK: Go to next step
5. CHECK HARNESS AND CONNECTOR (ST RELAY - BODY GROUND) Remove the ST relay from the No. 3 relay block. Measure the resistance according to the value(s) in the table below. Standard Resistance Tester Connection Condition Specified Condition ST relay terminal 1 - Body ground Always Below 1 ohms RESULT Result Proceed to OK (for Manual Transaxle) A OK (for Automatic Transaxle) B NG C B --> REPAIR OR REPLACE HARNESS OR CONNECTOR (ECM - PARK/NEUTRAL POSITION SWITCH) C --> REPAIR OR REPLACE HARNESS OR CONNECTOR (ST RELAY - BODY GROUND) A --> REPAIR OR REPLACE HARNESS OR CONNECTOR (ECM - CLUTCH PEDAL SWITCH)
6. CHECK HARNESS AND CONNECTOR (ST RELAY - CLUTCH PEDAL SWITCH) Remove the ST relay from the No. 3 relay block. Disconnect the clutch pedal switch (for clutch start system) connector. Measure the resistance according to the value(s) in the table below. Standard Resistance (Check for Open) Tester Connection Condition Specified Condition ST relay terminal 2 - A4-1 Always Below 1 ohms Standard Resistance (Check for Short) Tester Connection Condition Specified Condition ST relay terminal 2 or A4-1 - Body ground Always 10 kohms or higher NG --> REPAIR OR REPLACE HARNESS OR CONNECTOR (ST RELAY - CLUTCH PEDAL SWITCH) OK: Go to next step
7. INSPECT CLUTCH PEDAL SWITCH ASSEMBLY (FOR CLUTCH START SYSTEM) Inspect the clutch pedal switch assembly. Refer to «INSPECTION»(ref-451176-S37533855712012020700000) . NG --> See step 19 OK: Go to next step
8. CHECK HARNESS AND CONNECTOR (CLUTCH PEDAL SWITCH - IGNITION SWITCH) Disconnect the clutch pedal switch (for clutch start system) connector. Disconnect the ignition switch connector. Measure the resistance according to the value(s) in the table below. Standard Resistance (Check for Open) Tester Connection Condition Specified Condition A4-2 - C5-1 (ST1) Always Below 1 ohms Standard Resistance (Check for Short) Tester Connection Condition Specified Condition A4-2 or C5-1 (ST1) - Body ground Always 10 kohms or higher NG --> REPAIR OR REPLACE HARNESS OR CONNECTOR (CLUTCH PEDAL SWITCH - IGNITION SWITCH) OK: Go to next step
9. INSPECT IGNITION SWITCH ASSEMBLY Disconnect the ignition switch connector. Measure the resistance according to the value(s) in the table below. Standard Resistance Tester Connection Switch Condition Specified Condition All terminals Off 10 kohms or higher 2 (AM1) - 1 (ST1) START Below 1 ohms TEXT IN ILLUSTRATION *a Component without harness connected (Ignition Switch Assembly) NG --> See step 20 OK --> REPAIR OR REPLACE HARNESS OR CONNECTOR (IGNITION SWITCH - BATTERY)
10. CHECK HARNESS AND CONNECTOR (ST RELAY - PARK/NEUTRAL POSITION SWITCH) Remove the ST relay from the No. 3 relay block. Disconnect the park/neutral position switch connector. Measure the resistance according to the value(s) in the table below. Standard Resistance (Check for Open) Tester Connection Condition Specified Condition ST relay terminal 2 - B14-9 Always Below 1 ohms Standard Resistance (Check for Short) Tester Connection Condition Specified Condition ST relay terminal 2 or B14-9 - Body ground Always 10 kohms or higher NG --> REPAIR OR REPLACE HARNESS OR CONNECTOR (ST RELAY - PARK/NEUTRAL POSITION SWITCH) OK: Go to next step
11. INSPECT PARK/NEUTRAL POSITION SWITCH ASSEMBLY Inspect the park/neutral position switch assembly. Refer to «INSPECTION»(ref-451170-S41582320372012020700000) . NG --> See step 21 OK: Go to next step
12. CHECK HARNESS AND CONNECTOR (PARK/NEUTRAL POSITION SWITCH - IGNITION SWITCH) Disconnect the park/neutral position switch connector. Disconnect the ignition switch connector. Measure the resistance according to the value(s) in the table below. Standard Resistance (Check for Open) Tester Connection Condition Specified Condition B14-4 - C5-1 (ST1) Always Below 1 ohms Standard Resistance (Check for Short) Tester Connection Condition Specified Condition B14-4 or C5-1 (ST1) - Body ground Always 10 kohms or higher NG --> REPAIR OR REPLACE HARNESS OR CONNECTOR (PARK/NEUTRAL POSITION SWITCH - IGNITION SWITCH) OK: Go to next step
13. INSPECT IGNITION SWITCH ASSEMBLY Disconnect the ignition switch connector. Measure the resistance according to the value(s) in the table below. Standard Resistance Tester Connection Switch Condition Specified Condition All terminals Off 10 kohms or higher 2 (AM1) - 1 (ST1) START Below 1 ohms TEXT IN ILLUSTRATION *a Component without harness connected (Ignition Switch Assembly) NG --> See step 22 OK --> REPAIR OR REPLACE HARNESS OR CONNECTOR (IGNITION SWITCH - BATTERY)
14. READ VALUE USING TECHSTREAM (STARTER SIGNAL) Connect the Techstream to the DLC3. Turn the ignition switch to ON. Turn the Techstream on. Enter the following menus: Powertrain / Engine / Data List / Starter Signal. Read the value. OK Ignition Switch Position Starter Signal ON Close (Starter signal OFF) START Open (Starter signal ON) RESULT Result Proceed to OK A NG (for Automatic Transaxle) B NG (for Manual Transaxle) C B --> See step 15 C --> See step 17 A --> See step 26
15. INSPECT PARK/NEUTRAL POSITION SWITCH ASSEMBLY Inspect the park/neutral position switch assembly. Refer to «INSPECTION»(ref-451170-S41582320372012020700000) . NG --> See step 23 OK: Go to next step
16. CHECK HARNESS AND CONNECTOR (PARK/NEUTRAL POSITION SWITCH - ECM) Disconnect the park/neutral position switch 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 B14-9 - A35-48 (STA) Always Below 1 ohms Standard Resistance (Check for Short) Tester Connection Condition Specified Condition B14-9 or A35-48 (STA) - Body ground Always 10 kohms or higher NG --> REPAIR OR REPLACE HARNESS OR CONNECTOR OK --> See step 27
17. INSPECT CLUTCH PEDAL SWITCH ASSEMBLY (FOR CLUTCH START SYSTEM) Inspect the clutch pedal switch assembly (for clutch start system). Refer to «INSPECTION»(ref-451176-S37533855712012020700000) . NG --> See step 24 OK: Go to next step
18. CHECK HARNESS AND CONNECTOR (CLUTCH PEDAL SWITCH - ECM) Disconnect the clutch pedal switch (for clutch start system) 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 A4-1 - A35-48 (STA) Always Below 1 ohms Standard Resistance (Check for Short) Tester Connection Condition Specified Condition A4-1 or A35-48 (STA) - Body ground Always 10 kohms or higher NG --> REPAIR OR REPLACE HARNESS OR CONNECTOR OK --> See step 28
19. REPLACE CLUTCH PEDAL SWITCH ASSEMBLY (FOR CLUTCH START SYSTEM). Refer to «REMOVAL»(ref-451176-S25457226082012020700000)
20. REPLACE IGNITION SWITCH ASSEMBLY. Refer to «REMOVAL»(ref-451175-S04977620142012020700000)
21. REPLACE PARK/NEUTRAL POSITION SWITCH ASSEMBLY. Refer to «REMOVAL»(ref-451170-S34996445972012020700000)
22. REPLACE IGNITION SWITCH ASSEMBLY. Refer to «REMOVAL»(ref-451175-S04977620142012020700000)
23. REPLACE PARK/NEUTRAL POSITION SWITCH ASSEMBLY. Refer to «REMOVAL»(ref-451170-S34996445972012020700000)
24. REPLACE CLUTCH PEDAL SWITCH ASSEMBLY (FOR CLUTCH START SYSTEM). Refer to «REMOVAL»(ref-451176-S25457226082012020700000)
25. PROCEED TO NEXT SUSPECTED AREA SHOWN IN PROBLEM SYMPTOMS TABLE. Refer to «PROBLEM SYMPTOMS TABLE»(ref-451061-S17066097812012020700000)
26. PROCEED TO NEXT SUSPECTED AREA SHOWN IN PROBLEM SYMPTOMS TABLE. Refer to «PROBLEM SYMPTOMS TABLE»(ref-451061-S17066097812012020700000)
27. GO TO SMART KEY SYSTEM. Refer to «HOW TO PROCEED WITH TROUBLESHOOTING»(ref-451056-S26769048902012020700000)
28. GO TO SMART KEY SYSTEM. Refer to «HOW TO PROCEED WITH TROUBLESHOOTING»(ref-451056-S26769048902012020700000)

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

Scheme 151

1. PERFORM ACTIVE TEST USING TECHSTREAM (OPERATE VACUUM SWITCHING VALVE FOR ACIS) Disconnect the vacuum hose from port F of the vacuum switching valve (for ACIS). Connect the Techstream to the DLC3. Start the engine. Enter the following menus: Powertrain / Engine / Active Test / Active the VSV for Intake Control. Operate the vacuum switching valve for ACIS. Check the vacuum switching valve air flow when switching the vacuum switching valve. OK Test Condition Specified Condition Vacuum switching valve is ON Air from port E flows out through port F Vacuum switching valve is OFF Air from port E flows out through air filter TEXT IN ILLUSTRATION *1 Air *2 Port F *3 Port E *4 Air Filter *a Vacuum Switching Valve is ON *b Vacuum Switching Valve is OFF NG --> See step 5 OK: Go to next step
2. CHECK VACUUM HOSES (VACUUM SWITCHING VALVE (FOR ACIS) - INTAKE AIR CONTROL VALVE, INTAKE MANIFOLD) Check the vacuum hoses. Refer to «ON-VEHICLE INSPECTION - Step 1»(ref-451179-S04241581252012020700000) . NG --> REPAIR OR REPLACE VACUUM HOSES OK: Go to next step
3. INSPECT INTAKE MANIFOLD (INTAKE AIR CONTROL VALVE) Inspect the intake air control valve. Refer to «INSPECTION»(ref-451183-S09436556382012020700000) . NG --> See step 8 OK --> See step 4
4. PROCEED TO NEXT SUSPECTED AREA SHOWN IN PROBLEM SYMPTOMS TABLE. Refer to «PROBLEM SYMPTOMS TABLE»(ref-451061-S17066097812012020700000)
5. INSPECT VACUUM SWITCHING VALVE ASSEMBLY (FOR ACIS) Inspect the vacuum switching valve assembly (for ACIS). Refer to «ON-VEHICLE INSPECTION»(ref-451183-S03956670182012020700000) . NG --> See step 9 OK: Go to next step
6. CHECK HARNESS AND CONNECTOR (VACUUM SWITCHING VALVE (FOR ACIS) - ECM AND INTEGRATION RELAY) Disconnect the vacuum switching valve (for ACIS) connector. Disconnect the ECM connector. Remove the integration relay from the engine room relay block. Disconnect the integration relay connector. Measure the resistance according to the value(s) in the table below. Standard Resistance Tester Connection Condition Specified Condition B19-1 - B30-27 (ACIS) Always Below 1 ohms B19-2 - 1B-4 Always Below 1 ohms B19-1 or B30-27 (ACIS) - Body ground Always 10 kohms or higher B19-2 or 1B-4 - Body ground Always 10 kohms or higher NG --> REPAIR OR REPLACE HARNESS OR CONNECTOR OK --> See step 7
7. REPLACE ECM. Refer to «REMOVAL»(ref-451166-S22630148492012020700000)
8. REPLACE INTAKE MANIFOLD. Refer to «REMOVAL»(ref-451183-S13826490012012020700000)
9. REPLACE VACUUM SWITCHING VALVE ASSEMBLY (FOR ACIS). Refer to «REMOVAL»(ref-451183-S13826490012012020700000)

Inspection Method

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

HINT

1. Under normal conditions, the Accelerator Position value changes in response to the Accel Sens. No. 1 Volt % value. For more information on the numerical values, refer to the Data List. Refer to «DATA LIST / ACTIVE TEST»(ref-451061-S12130890322012020700000) .
2. If the Data List values of Accelerator Position and Accel Sens. No. 1 Volt % do not match, and the value of Accelerator Position changes but the value of Accel Sens. No. 1 Volt % is constant, this confirms that the brake override system has activated. (Data can be captured relatively easily by using the snapshot function in the Data List. Confirm the data after performing the driving test.)

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