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Inspection Procedure

  1. CHECK MIL CONDITION 
    1. Check that the Malfunction Indicator Lamp (MIL) lights up when turning the ignition switch to the ON position.

      OK: MIL lights up. 

    OK: SYSTEM OK 

    NG: Go To Next Step 

  2. CHECK COMMUNICATION BETWEEN TECHSTREAM AND ECM 
    1. Connect Techstream to the DLC3.
    2. Turn the ignition switch to the ON position and turn the tester on.
    3. Check for communication between the tester and ECM.

      Result 

      RESULT CHART

      Result Proceed to
      Communication is possible A
      Communication is not possible B

    A: Go TO MIL CIRCUIT 

    B: Go To Next Step 

  3. CHECK MIL (THROTTLE POSITION SENSOR) 
    1. Disconnect the C5 throttle body connector.
    2. Turn the ignition switch to the ON position.
    3. Check the MIL.

      Result 

      RESULT CHART

      Result Proceed to
      MIL illuminates A
      MIL does not illuminate B
    4. Reconnect the throttle body connector.

    A: REPLACE THROTTLE BODY ASSEMBLY 

    B: Go To Next Step 

  4. CHECK MIL (ACCELERATOR PEDAL POSITION SENSOR) 
    1. Disconnect the A17 accelerator pedal position sensor connector.
    2. Turn the ignition switch to the ON position.
    3. Check the MIL.

      Result 

      RESULT CHART

      Result Proceed to
      MIL illuminates A
      MIL does not illuminate B
    4. Reconnect the accelerator pedal position sensor connector.

    A: REPLACE ACCELERATOR PEDAL ASSEMBLY 

    B: Go To Next Step 

  5. CHECK MIL (CANISTER PUMP MODULE) 
    1. Disconnect the N17 canister pump module connector.
    2. Turn the ignition switch to the ON position.
    3. Check the MIL.

      Result 

      RESULT CHART

      Result Proceed to
      MIL illuminates A
      MIL does not illuminate B
    4. Reconnect the canister pump module connector.
      5. Fig 1: Identifying Canister Pump Module Connector
      G04973329Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

    A: REPLACE CHARCOAL CANISTER ASSEMBLY 

    B: Go To Next Step 

  6. CHECK HARNESS AND CONNECTOR 
    1. Disconnect the C5 throttle body connector.
    2. Disconnect the A17 accelerator pedal position sensor connector.
    3. Disconnect the N17 canister pump module connector.
    4. Disconnect the A24 and C24 ECM connectors.
    5. Measure the resistance between the terminals of the wire harness side connectors.

      Standard resistance (Check for short) 

      TESTER CONNECTION SPECIFIED CONDITION CHART (FOR SHORT)

      Tester Connection Specified Condition
      C24-67 (VCTA) - Body ground 10 kΩ or higher
      A24-57 (VCPA) - Body ground 10 kΩ or higher
      A24-58 (VCP2) - Body ground 10 kΩ or higher
      C24-70 (VCPP) - Body ground 10 kΩ or higher
      Fig 2: Identifying ECM Connectors
      G04973330Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    6. Reconnect the throttle body connector.
    7. Reconnect the accelerator pedal position sensor connector.
    8. Reconnect the canister pump module connector.
    9. Reconnect the ECM connectors.

    NG: REPAIR OR REPLACE HARNESS OR CONNECTOR 

    OK: REPLACE ECM (See  REMOVAL   ) 

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