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Home >> Toyota >> 2008 >> Sequoia SR5, 4.7 T, RWD >> Repair and Diagnosis >> Engine Performance >> System >> Engine Control System (2UZ-FE) - Component And System Testing, On-Vehicle Inspection, Removal, Inspection And Installation >> VC Output Circuit >> Inspection Procedure

Inspection Procedure

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

      OK: MIL lights up 

    NG: Go to step 2 

    OK: END 

  2. CHECK COMMUNICATION BETWEEN TECHSTREAM AND ECM 
    1. Connect the Techstream to the DLC3.
    2. Turn the ignition switch to ON.
    3. Turn the Techstream ON.
    4. Check the communication between the Techstream and ECM.

      Result 

      RESULT CHART

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

    B: GO TO MIL CIRCUIT 

    A: Go to Next Step. 

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

      Result 

      RESULT CHART

      Result Proceed to
      MIL does not illuminate A
      MIL illuminates B

    B: REPLACE THROTTLE BODY ASSEMBLY  (See REMOVAL  )

    A: 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 ON.
    3. Check the MIL.

      Result 

      RESULT CHART

      Result Proceed to
      MIL does not illuminate A
      MIL illuminates B

    B: REPLACE ACCELERATOR PEDAL POSITION SENSOR  (See REMOVAL  )

    A: Go to Next Step. 

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

      Result 

      RESULT CHART

      Result Proceed to
      MIL does not illuminate A
      MIL illuminates B

    B: REPLACE CHARCOAL CANISTER ASSEMBLY  (See REMOVAL )

    A: Go to Next Step. 

    Fig 1: Identifying Canister Pump Module Connector
    G05645159Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
  6. CHECK MIL (AIR SWITCHING VALVE for Bank 1) 
    1. Disconnect the air switching valve connector.
    2. Turn the ignition switch to ON.
    3. Check the MIL.

      Result 

      RESULT CHART

      Result Proceed to
      MIL does not illuminate A
      MIL illuminates B

    B: REPLACE AIR SWITCHING VALVE (for Bank 1)  (See REMOVAL )

    A: Go to Next Step. 

  7. CHECK MIL (AIR SWITCHING VALVE for Bank 2) 
    1. Disconnect the air switching valve connector.
    2. Turn the ignition switch to ON.
    3. Check the MIL

      Result 

      RESULT CHART

      Result Proceed to
      MIL does not illuminate A
      MIL illuminates B

    B: REPLACE AIR SWITCHING VALVE (for Bank 2)  (See REMOVAL )

    A: Go to Next Step. 

  8. CHECK MIL (POWER STEERING OIL PRESSURE SENSOR) 
    1. Disconnect the power steering oil pressure sensor connector.
    2. Turn the ignition switch to ON.
    3. Check the MIL.

      Result 

      RESULT CHART

      Result Proceed to
      MIL does not illuminate A
      MIL illuminates B

    B: REPLACE POWER STEERING OIL PRESSURE SENSOR  (See REMOVAL  )

    A: Go to Next Step. 

  9. CHECK MIL (CAMSHAFT POSITION SENSOR) 
    1. Disconnect the camshaft position sensor connector.
    2. Turn the ignition switch to ON. c) Check the MIL

      Result 

      RESULT CHART

      Result Proceed to
      MIL does not illuminate A
      MIL illuminates B

    B: REPLACE CAMSHAFT POSITION SENSOR  (See REMOVAL  )

    A: Go to Next Step. 

  10. 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 air switching valve connector.
    5. Disconnect the air switching valve connector.
    6. Disconnect the power steering oil pressure sensor connector.
    7. Disconnect the camshaft position sensor connector.
    8. Disconnect the ECM connectors.
    9. Measure the resistance according to the value(s) in the table below.

      Standard Resistance 

      RESISTANCE SPECIFICATION

      Tester Connection Condition Specified Condition
      D56-80 (VCTA) - Body ground Always 10 kΩ or higher
      A27-57 (VCPA) - Body ground Always 10 kΩ or higher
      A27-59 (VCP2) - Body ground Always 10 kΩ or higher
      D56-66 (VC) - Body ground Always 10 kΩ or higher

    NG: REPAIR OR REPLACE HARNESS OR CONNECTOR 

    OK: REPLACE ECM  (See REMOVAL  )

    Fig 2: Identifying Camshaft Position Sensor And ECM Connector Terminals
    G05645160Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
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