FixVault
Home › Toyota › 2008 › Tundra Base, 5.7 V, RWD › Repair and Diagnosis › Engine Performance › Engine Control Systems › Engine Control System (3UR-FE) - System Testing, On-Vehicle Inspection, Removal, Inspection & 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 : SYSTEM OK 

  2. CHECK COMMUNICATION BETWEEN TECHSTREAM AND ECM 
    1. Connect the Techstream to the DLC3.
    2. Turn the ignition switch to ON and Techstream ON.
    3. Check the communication between the Techstream 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 POSITION SENSOR) 
    1. Disconnect the D9 throttle body connector.
    2. Turn the ignition switch to ON.
    3. Check the MIL.

      Result 

      RESULT REFERENCE

      Result Proceed To
      MIL illuminates A
      MIL does not illuminate B

    A : REPLACE THROTTLE BODY ASSEMBLY  (See REMOVAL  )

    B : Go to next step 

  4. CHECK MIL (ACCELERATOR PEDAL POSITION SENSOR) 
    1. Disconnect the A14 accelerator pedal position sensor connector.
    2. Turn the ignition switch to ON.
    3. Check the MIL.

      Result 

      RESULT REFERENCE

      Result Proceed To
      MIL illuminates A
      MIL does not illuminate B

    A : REPLACE ACCELERATOR PEDAL POSITION SENSOR  (See REMOVAL  )

    B : Go to next step 

  5. CHECK MIL (CANISTER PUMP MODULE) 
    1. Disconnect the R1 canister pump module connector.
    2. Turn the ignition switch to ON.
    3. Check the MIL.

      Result 

      RESULT REFERENCE

      Result Proceed To
      MIL illuminates A
      MIL does not illuminate B

    A : REPLACE CHARCOAL CANISTER ASSEMBLY  . (See CANISTER ).

    Fig 1: Identifying R1 Canister Pump Module Connector
    G05681648Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

    B : Go to next step 

  6. CHECK MIL (AIR SWITCHING VALVE for Bank 1) 
    1. Disconnect the D58 air switching valve connector.
    2. Turn the ignition switch to ON.
    3. Check the MIL.

      Result 

      RESULT REFERENCE

      Result Proceed To
      MIL illuminates A
      MIL does not illuminate B

    A : REPLACE AIR SWITCHING VALVE  . (See AIR SWITCHING VALVE ).

    B : Go to next step 

  7. CHECK MIL (AIR SWITCHING VALVE for Bank 2) 
    1. Disconnect the D59 air switching valve connector.
    2. Turn the ignition switch to ON.
    3. Check the MIL.

      Result 

      RESULT REFERENCE

      Result Proceed To
      MIL illuminates A
      MIL does not illuminate B

    A : REPLACE AIR SWITCHING VALVE  . (See AIR SWITCHING VALVE ).

    B : Go to next step 

  8. CHECK MIL (POWER STEERING OIL PRESSURE SENSOR) 
    1. Disconnect the D46 power steering oil pressure sensor connector.
    2. Turn the ignition switch to ON.
    3. Check the MIL.

      Result 

      RESULT REFERENCE

      Result Proceed To
      MIL illuminates A
      MIL does not illuminate B

    A : REPLACE POWER STEERING OIL PRESSURE SENSOR 

    B : Go to next step 

  9. CHECK MIL (CAMSHAFT POSITION SENSOR) 
    1. Disconnect the D6 camshaft position sensor connector.
    2. Turn the ignition switch to ON.
    3. Check the MIL.

      Result 

      RESULT REFERENCE

      Result Proceed To
      MIL illuminates A
      MIL does not illuminate B

    A : REPLACE CAMSHAFT POSITION SENSOR  (See INSTALLATION  )

    B : Go to next step 

  10. CHECK MIL (CRANKSHAFT POSITION SENSOR) 
    1. Disconnect the D3 crankshaft position sensor connector.
    2. Turn the ignition switch to ON.
    3. Check the MIL.

      Result 

      RESULT REFERENCE

      Result Proceed To
      MIL illuminates A
      MIL does not illuminate B

    A : REPLACE CRANKSHAFT POSITION SENSOR  (See INSTALLATION  )

    B : Go to next step 

  11. CHECK MIL (VVT SENSOR for Intake Side of Bank 1) 
    1. Disconnect the D37 VVT sensor (for Intake Side of Bank 1) connector.
    2. Turn the ignition switch to ON.
    3. Check the MIL.

      Result 

      RESULT REFERENCE

      Result Proceed To
      MIL illuminates A
      MIL does not illuminate B

    A : REPLACE VVT SENSOR (for Intake Side of Bank 1)  (See INSTALLATION  )

    B : Go to next step 

  12. CHECK MIL (VVT SENSOR for Exhaust Side of Bank 1) 
    1. Disconnect the D40 VVT sensor (for Exhaust Side of Bank 1) connector.
    2. Turn the ignition switch to ON.
    3. Check the MIL.

      Result 

      RESULT REFERENCE

      Result Proceed To
      MIL illuminates A
      MIL does not illuminate B

    A : REPLACE VVT SENSOR (for Exhaust Side of Bank 1)  (See INSTALLATION  )

    B : Go to next step 

  13. CHECK MIL (VVT SENSOR for Intake Side of Bank 2) 
    1. Disconnect the D39 VVT sensor (for Intake Side of Bank 2) connector.
    2. Turn the ignition switch to ON.
    3. Check the MIL.

      Result 

      RESULT REFERENCE

      Result Proceed To
      MIL illuminates A
      MIL does not illuminate B

    A : REPLACE VVT SENSOR (for Intake Side of Bank 2)  (See INSTALLATION  )

    B : Go to next step 

  14. CHECK MIL (VVT SENSOR for Exhaust Side of Bank 2) 
    1. Disconnect the D41 VVT sensor (for Exhaust Side of Bank 2) connector.
    2. Turn the ignition switch to ON.
    3. Check the MIL.

      Result 

      RESULT REFERENCE

      Result Proceed To
      MIL illuminates A
      MIL does not illuminate B

    A : REPLACE VVT SENSOR (for Exhaust Side of Bank 2)  (See INSTALLATION  )

    B : Go to next step 

  15. CHECK HARNESS AND CONNECTOR 
    1. Disconnect the D9 throttle body connector.
    2. Disconnect the A14 accelerator pedal position sensor connector.
    3. Disconnect the R1 canister pump module connector.
    4. Disconnect the D58 air switching valve connector.
    5. Disconnect the D59 air switching valve connector.
    6. Disconnect the D46 power steering oil pressure sensor connector.
    7. Disconnect the D6 camshaft position sensor connector.
    8. Disconnect the D3 crankshaft position sensor connector.
    9. Disconnect the D37 VVT sensor (for Intake Side of Bank 1) connector.
    10. Disconnect the D40 VVT sensor (for Exhaust Side of Bank 1) connector.
    11. Disconnect the D39 VVT sensor (for Intake Side of Bank 2) connector.
    12. Disconnect the D41 VVT sensor (for Exhaust Side of Bank 2) connector.
    13. Disconnect the A24 and D74 ECM connectors.
    14. Measure the resistance according to the value(s) in the table below.

      Standard resistance 

      STANDARD RESISTANCE SPECIFICATION

      Tester Connection Condition Specified Condition
      D74-80 (VCTA) - Body ground Always 10 kΩ or higher
      A24-57 (VCPA) - Body ground Always 10 kΩ or higher
      A24-59 (VCP2) - Body ground Always 10 kΩ or higher
      D74-66 (VCV2) - Body ground Always 10 kΩ or higher
      D74-67 (VCV1) - Body ground Always 10 kΩ or higher

    NG : REPAIR OR REPLACE HARNESS OR CONNECTOR 

    Fig 2: Identifying A24 & D74 ECM Connector Terminals
    G05681649Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

    OK : REPLACE ECM  (See REMOVAL  )

About FixVault