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Inspection Procedure

  1. CHECK HARNESS AND CONNECTOR (POWER SOURCE CIRCUIT) 
    1. Disconnect the connector from the J/B No.2 (power distributor).
    2. Measure the voltage according to the value(s) in the table below.

    Voltage 

    VOLTAGE REFERENCE CHART

    Tester connection Condition Specified value
    BUB (2F-3) - Body ground Ignition switch ON 10 to 14 V
    BUB (2F-3) - Body ground Ignition switch OFF Below 1 V

    NG: REPAIR OR REPLACE HARNESS OR CONNECTOR 

    Fig 1: Disconnecting Connector From J/B No.2 (Power Distributor)
    G05280061Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

    OK: Go to next step 

  2. CHECK MODE MONITOR TERMINAL (BACK-UP RELAY) 
    1. Preparation
      1. Connect the connector.
      2. Remove the cover of the fusible link block assembly.
      3. Set the vehicle to the following condition.
        • Ignition switch ON.
        • Shift in R position.
    2. Check voltage
      1. Measure the voltage between the Mode Monitor Terminal and body ground.

    Voltage 

    RESULT CHART

    Result Proceed to
    0 V or Approx. 12V A
    Approx. 6.2 V B
    Approx. 2.0 V C

    B: GO TO step   4 

    C: GO TO step   8 

    Fig 2: Identifying Mode Monitor Terminal
    G05201886Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

    A: Go to next step 

  3. CHECK HARNESS AND CONNECTOR (J/B NO. 2 - MODE MONITOR TERMINAL) 
    1. Disconnect the 2G connector from the J/B No.2.
    2. Measure the resistance according to the value(s) in the table below.

    Resistance 

    TESTER CONNECTION SPECIFIED VALUE REFERENCE CHART

    Tester connection Condition Specified value
    2G-5 - Mode monitor terminal Always Below 1 Ω
    2G-5 - Body ground Always 10 kΩ or higher

    NG: REPAIR OR REPLACE HARNESS OR CONNECTOR 

    Fig 3: Identifying J/B No. 2 And Fusible Link Connector Terminal
    G05280033Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

    OK: Go to next step 

  4. INSPECT JUNCTION BLOCK NO.2 (BACK-UP RELAY) 
    1. Turn the ignition switch to OFF position.
    2. Remove the J/B No.2.
    3. Inspect the back-up relay.
      Fig 4: Identifying J/B No. 2 Connector Terminals
      G05280064Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
      1. Connect the positive battery lead to terminal BUB of the J/B No.2 and the negative lead to terminal SGND, PGND.
        SYMBOL CONNECTION REFERENCE CHART

        Symbols (terminals No.) Connection
        BUB (2F-3) - SGND (2H-13), PGND (2F-1) Positive - Negative
      2. Measure the voltage according to the value(s) in the table below.

        Voltage 

        TESTER CONNECTION SPECIFIED CONDITION REFERENCE CHART

        Tester Connection Specified Condition
        BUL (2E-1) - SGND (2H-13) 0 V
      3. Connect the battery positive lead to terminal BKR of the J/B No.2.
        SYMBOL CONNECTION REFERENCE CHART

        Symbols (terminals No.) Connection
        BKR (2G-7) Positive
      4. Measure the voltage according to the value(s) in the table below.

    Voltage 

    TESTER CONNECTION SPECIFIED CONDITION REFERENCE CHART

    Tester Connection Specified Condition
    BUL (2E-1) - SGND (2H-13) 10 to 14 V

    NG: REPLACE JUNCTION BLOCK NO.2 

    OK: Go to next step 

  5. CHECK HARNESS AND CONNECTOR (J/B NO. 2 - HV CONTROL ECU) 
    1. Disconnect the connector from the J/B No.2 (power distributor) and HV control ECU.
    2. Measure the resistance according to the value(s) in the table below.

    Resistance 

    TESTER CONNECTION SPECIFIED VALUE REFERENCE CHART

    Tester connection Condition Specified value
    2G-7 (BKR) - H30-29 (BL) Always Below 1 Ω
    2G-7 (BKR) - Body ground Always 10 kΩ or higher

    NG: REPAIR OR REPLACE HARNESS OR CONNECTOR 

    Fig 5: Disconnecting Connector From J/B No.2 (Power Distributor) And HV Control ECU
    G05280065Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

    OK: Go to next step 

  6. CHECK HARNESS AND CONNECTOR (J/B NO. 2 - BULB) 
    1. Disconnect the connectors from the J/B No.2 (power distributor) and back-up light bulbs.
    2. Measure the resistance according to the value(s) in the table below.

    Resistance 

    TESTER CONNECTION SPECIFIED VALUE REFERENCE CHART

    Tester connection Condition Specified value
    2E-1 (BUL) - B14-2 (Back-up light LH) Always Below 1 Ω
    2E-1 (BUL) - B15-2 (Back-up light RH) Always Below 1 Ω
    2E-1 (BUL)- Body ground Always 10 kΩ or higher

    NG: REPAIR OR REPLACE HARNESS OR CONNECTOR 

    Fig 6: Disconnecting Connectors From J/B No.2 (Power Distributor) And Back-Up Light Bulbs
    G05280066Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

    OK: Go to next step 

  7. CHECK HARNESS AND CONNECTOR (BULB - BODY GROUND) 
    1. Measure the resistance according to the value(s) in the table below.

    Resistance 

    TESTER CONNECTION SPECIFIED VALUE REFERENCE CHART

    Tester connection Condition Specified value
    B14-1 (Back-up light LH) - Body ground Always Below 1 Ω
    B15-1 (Back-up light RH) - Body ground Always Below 1 Ω

    NG: REPAIR OR REPLACE HARNESS OR CONNECTOR 

    Fig 7: Identifying Bulb Connector Terminals
    G05280067Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

    OK: PROCEED TO NEXT CIRCUIT INSPECTION SHOWN IN PROBLEM SYMPTOMS TABLE 

  8. CHECK HARNESS AND CONNECTOR (SHORT CIRCUIT DRIVEN SIDE BY RELAY) 
    1. Preparation
      1. For easier disconnection remove the J/B No.2 and then take apart the connectors.
      2. Disconnect only the connector "2E".
    2. Check voltage
      1. Measure the voltage between the Mode Monitor Terminal and body ground.

    Voltage 

    RESULT CHART

    Result Proceed to
    Approx. 6.2 V A
    Approx. 2.0 V B

    B: REPLACE JUNCTION BLOCK NO.2 

    Fig 8: Disconnecting Bulb 2E Connector
    G05280068Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

    OK: REPAIR OR REPLACE HARNESS OR CONNECTOR (SHORT CIRCUIT BETWEEN BACK-UP LIGHT AND J/B NO. 2) 

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