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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 INTELLIGENT TESTER AND HV CONTROL ECU 
    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 HV control ECU.

      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 throttle body connector.
    2. Turn the ignition switch to the ON position.
    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 ASSEMBLY 

    B: Go to next step 

  4. CHECK MIL (VAPOR PRESSURE SENSOR) 
    1. Disconnect the vapor pressure sensor connector.
    2. Turn the ignition switch to the ON position.
    3. Check the MIL

    Result 

    RESULT REFERENCE

    Condition Proceed to
    MIL illuminates A
    MIL does not illuminate B

    A: REPLACE VAPOR PRESSURE SENSOR 

    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 REFERENCE

      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: Locating Canister Pump Module Connector
    G05200208Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

    B: Go to next step 

  6. CHECK HARNESS AND CONNECTOR 
    1. Disconnect the throttle body connector.
    2. Disconnect the fuel tank pressure sensor connector.
    3. Disconnect the canister pump module connector.
    4. Disconnect the HV control ECU connectors.
    5. Measure the resistance according to the value(s) in the table below.

      Standard resistance (Check for short) 

      TESTER CONNECTION AND SPECIFIED CONDITION

      Tester Connection Specified Condition
      H32-18 (VC) - Body ground 10 kΩ or higher
    6. Reconnect the throttle body connector.
    7. Reconnect the fuel tank pressure sensor connector.
    8. Reconnect the canister pump module connector.
    9. Reconnect the HV control ECU connectors.

    NG: REPAIR OR REPLACE HARNESS OR CONNECTOR 

    Fig 2: Identifying HV Control ECU Connectors
    G05275749Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

    OK: REPLACE HV CONTROL ECU 

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