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Home >> Toyota >> 2007 >> Highlander Limited, FWD >> Repair and Diagnosis >> Engine Performance >> Engine Control System (3MZ-FE) (Except Hybrid) >> SFI System >> VC Output Circuit >> Inspection Procedure

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 INTELLIGENT TESTER AND ECM 
    1. Connect the intelligent tester 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 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 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 

    B: Go to Next Step 

  5. CHECK MIL (CANISTER PUMP MODULE) 
    1. Disconnect the 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.

    A: REPLACE CHARCOAL CANISTER ASSEMBLY 

    Fig 1: Identifying Canister Pump Module Connector
    G05245777Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

    B: Go to Next Step 

  6. CHECK HARNESS AND CONNECTOR 
    1. Disconnect the throttle body connector.
    2. Disconnect the accelerator pedal position sensor connector.
    3. Disconnect the canister pump module connector.
    4. Disconnect the ECM connectors.
    5. Measure the resistance according to the value (s) in the table below.

      Standard resistance (Check for short) 

      TESTER CONNECTION SPECIFIED CONDITION CHART

      Tester Connection Specified Condition
      E7-25 (VCTA) - Body ground 10 kΩ or higher
      E5-26 (VCPA) - Body ground 10 kΩ or higher
      E5-27 (VCP2). Body ground 10 kΩ or higher
      E7-23 (VC) - Body ground 10 kΩ or higher
    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.
      Fig 2: Identifying ECM Connector Terminal
      G05245778Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

    NG: REPAIR OR REPLACE HARNESS OR CONNECTOR 

    OK: REPLACE ECM 

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