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Home >> Toyota >> 2007 >> Tacoma X-Runner >> Repair and Diagnosis >> Engine Performance >> Engine Control System (1GR-FE) >> SFI System >> VC Output Circuit >> Inspection Procedure
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Inspection Procedure

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

      OK: 

      MIL lights up 

    OK : SYSTEM OK 

    NG: Go to Next Step 

  2. CHECK CONNECTION BETWEEN INTELLIGENT TESTER AND ECM 
    1. Connect an intelligent tester to the DLC3.
    2. Turn the ignition switch ON and turn the tester ON.
    3. Check the communication between an intelligent tester and ECM.

      Result 

      RESULT REFERENCE

      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 BODY) 
    1. Disconnect the throttle body connector.
    2. Turn the ignition switch ON.
    3. Check the MIL

      Result 

      RESULT REFERENCE

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

    A: REPLACE THROTTLE BODY 

    B: Go to Next Step 

  4. CHECK MIL (ACCELERATOR PEDAL) 
    1. Disconnect the accelerator pedal connector.
    2. Turn the ignition switch ON.
    3. Check the MIL.

      Result 

      RESULT REFERENCE

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

    A: REPLACE ACCELERATOR PEDAL ASSEMBLY 

    B: Go to Next Step 

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

      Result 

      RESULT REFERENCE

      Result Proceed to
      MIL Illuminates A
      MIL does not Illuminate B
    4. Reconnect the canister pump module connector.

    A: REPLACE CHARCOAL CANISTER ASSEMBLY 

    B: Go to Next Step 

  6. CHECK HARNESS AND CONNECTOR 
    1. Disconnect the throttle body connector.
    2. Disconnect the accelerator pedal connector.
    3. Disconnect the canister pump module connector.
    4. Disconnect the ECM connector.
    5. Measure the resistance of the wire harness side connector.

      Standard Resistance (check for short) 

      TESTER CONNECTION AND SPECIFIED CONDITION

      Tester Connection Specified Condition
      VC (E4-23) - Body ground 10 kΩ or higher
      VCPA (E8-26) - Body ground
      VCP2 (E8-27) - Body ground
      Fig 1: Identifying ECM Connector
      G05197978Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    6. Reconnect the throttle body connector.
    7. Reconnect the accelerator pedal connector.
    8. Reconnect the canister pump module connector.
    9. Reconnect the ECM connector.

    NG: REPAIR OR REPLACE HARNESS OR CONNECTOR 

    OK : REPLACE ECM 

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