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Inspection Procedure

HINT:

Read freeze frame data using the intelligent tester or the OBD II scan tool. 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 running or stopped, 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. READ VALUE OF INTELLIGENT TESTER (ACCEL POS #1 AND ACCEL POS #2) 
    1. Connect the intelligent tester to the DLC3.
    2. Turn the ignition switch ON.
    3. On the intelligent tester, enter the following menus: DIAGNOSIS / ENHANCED OBD II / DATA LIST / ALL / ACCEL POS #1 and ACCEL POS #2. Read the values.

    Standard voltage 

    ACCEL POS #1 AND ACCEL POS #2

    Accelerator Pedal ACCEL POS #1 ACCEL POS #2
    Released 0.5 to 1.1 V 1.2 to 2.0 V
    Depressed 2.6 to 4.5 V 3.4 to 5.3 V
    Fig 1: Identifying Brake Pedal Depressed And Released
    G04087321Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

    OK : REPLACE ECM 

    NG : Go to next step 

  2. INSPECT ACCELERATOR PEDAL ROD ASSEMBLY (ACCELERATOR PEDAL POSITION SENSOR) 
    1. Disconnect the A12 sensor connector.
    2. Measure the resistance of the sensor terminals.

    Standard resistance 

    ACCELERATOR PEDAL ROD ASSEMBLY (ACCELERATOR PEDAL POSITION SENSOR)

    Tester Connection Specified Condition
    3 (VPA2) - 5 (EPA) 5.0 kΩ or less
    6 (VPA1) - 2 (EPA2) 5.0 kΩ or less
    4 (VCP1) - 5 (EPA) 2.25 to 4.75 kΩ
    1 (VCP2) - 2 (EPA2) 2.25 to 4.75 kΩ
    Fig 2: Inspecting Accelerator Pedal Rod Assembly (Accelerator Pedal Position Sensor)
    G04087322Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

    NG : REPLACE ACCELERATOR PEDAL ROD ASSEMBLY 

    OK : Go to next step 

  3. INSPECT ECM (VPA, VPA2 VOLTAGE) 
    1. Turn the ignition switch ON.
    2. Measure the voltage of the ECM connector.

    Standard voltage 

    ECM (VPA, VPA2 VOLTAGE)

    Tester Condition Accelerator Pedal Condition Specified Condition
    E5-22 (VPA) - E5-28 (EPA) Released 0.5 to 1.1 V
    E5-22 (VPA) - E5-28 (EPA) Depressed 2.6 to 4.5 V
    E5-23 (VPA2) - E5-29 (EPA2) Released 1.2 to 2.9 V
    E5-23 (VPA2) - E5-29 (EPA2) Depressed 3.4 to 5.5 V
    Fig 3: Inspecting ECM (VPA, VPA2 Voltage)
    G04087323Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

    OK : REPLACE ECM 

    NG : Go to next step 

  4. CHECK HARNESS AND CONNECTOR (ACCELERATOR PEDAL POSITION SENSOR - ECM) 
    1. Disconnect the A12 accelerator pedal position sensor connector.
    2. Disconnect the E5 ECM connector.
    3. Measure the resistance of the wire harness side connectors.

      Standard resistance 

      ACCELERATOR PEDAL POSITION SENSOR - ECM

      Tester Connection Specified Condition
      A12-6 (VCP1) - E5-26 (VCPA)
      A12-5 (VPA1) - E5-22 (VPA)
      A12-4 (VCP2) - E5-27 (VCP2)
      A12-3 (EP1) - E5-28 (EPA)
      A12-2 (VPA2) - E5-23 (VPA2)
      A12-1 (EP2) - E5-29 (EPA2)      		 Below 1 Ω
      A12-6 (VCP1) or E5-26 (VCPA) - Body ground
      A12-5 (VPA1) or E5-22 (VPA) - Body ground
      A12-4 (VCP2) or E5-27 (VCP2) - Body ground
      A12-3 (EP1) or E5-28 (EPA) - Body ground
      A12-2 (VPA2) or E5-23 (VPA2) - Body ground
      A12-1 (EP2) or E5-29 (EPA2) - Body ground      		 10 kΩ or higher
      Fig 4: Checking Harness And Connector (Accelerator Pedal Position Sensor - ECM)
      G04087324Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    4. Reconnect the accelerator sensor and ECM connectors.

    NG : REPAIR OR REPLACE HARNESS OR CONNECTOR 

    OK : REPLACE ACCELERATOR PEDAL ROD ASSEMBLY 

  1. INSPECT ECM (VPA, VPA2 VOLTAGE) 
    1. Turn the ignition switch ON.
    2. Measure the voltage of the ECM connector.

    Standard voltage 

    ECM (VPA, VPA2 VOLTAGE)

    Tester Condition Accelerator Pedal Condition Specified Condition
    E5-22 (VPA) - E5-28 (EPA) Released 0.5 to 1.1 V
    E5-22 (VPA) - E5-28 (EPA) Depressed 2.6 to 4.5 V
    E5-23 (VPA2) - E5-29 (EPA2) Released 1.2 to 2.9 V
    E5-23 (VPA2) - E5-29 (EPA2) Depressed 3.4 to 5.5 V
    Fig 5: Inspecting ECM (VPA, VPA2 Voltage)
    G04087325Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

    OK : REPLACE ECM 

    NG : Go to next step 

  2. CHECK HARNESS AND CONNECTOR (ACCELERATOR PEDAL POSITION SENSOR - ECM) 
    1. Disconnect the A12 accelerator pedal position sensor connector.
    2. Disconnect the E5 ECM connector.
    3. Measure the resistance of the wire harness side connectors.

      Standard resistance 

      ACCELERATOR PEDAL POSITION SENSOR - ECM

      Tester Connection Specified Condition
      A12-6 (VCP1) - E5-26 (VCPA)
      A12-5 (VPA1) - E5-22 (VPA)
      A12-4 (VCP2) - E5-27 (VCP2)
      A12-3 (EP1) - E5-28 (EPA)
      A12-2 (VPA2) - E5-23 (VPA2)
      A12-1 (EP2) - E5-29 (EPA2)      		 Below 1 Ω
      A12-6 (VCP1) or E5-26 (VCPA) - Body ground
      A12-5 (VPA1) or E5-22 (VPA) - Body ground
      A12-4 (VCP2) or E5-27 (VCP2) - Body ground
      A12-3 (EP1) or E5-28 (EPA) - Body ground
      A12-2 (VPA2) or E5-23 (VPA2) - Body ground
      A12-1 (EP2) or E5-29 (EPA2) - Body ground      		 10 kΩ or higher
      Fig 6: Checking Harness And Connector (Accelerator Pedal Position Sensor - ECM)
      G04087326Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    4. Reconnect the accelerator pedal position sensor connector and ECM connector.

    NG : REPAIR OR REPLACE HARNESS OR CONNECTOR 

    OK : REPLACE ACCELERATOR PEDAL ROD ASSEMBLY 

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