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Power Source Circuit [08/2014 - ]: Procedure

  1. CHECK HARNESS AND CONNECTOR (GND CIRCUIT) 
    1. Disconnect the seat belt control ECU connector.
      GTY536597Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    2. Measure the resistance according to the value(s) in the table below.

      Standard Resistance

      Tester Connection Condition Specified Condition
      H6-8 (PGND) - Body ground Always Below 1 Ω
      TEXT IN ILLUSTRATION

      *a Front view of wire harness connector
      (to Seat Belt Control ECU)
    3. Reconnect the seat belt control ECU connector.

    Result:  NG

    NG 

    REPAIR OR REPLACE HARNESS OR CONNECTOR (GND CIRCUIT) 

    Result:  OK

    OK 

    Refer to  2

  2. CHECK HARNESS AND CONNECTOR (IG1 CIRCUIT) 
    1. Disconnect the seat belt control ECU connector.
      GTY524085Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    2. Turn the power switch on (IG).
    3. Measure the voltage according to the value(s) in the table below.

      Standard Voltage

      Tester Connection Condition Specified Condition
      H7-8 (IG1) - H6-8 (PGND) Power switch on (IG) 11 to 14 V
      TEXT IN ILLUSTRATION

      *a Front view of wire harness connector
      (to Seat Belt Control ECU)
      *b Front view of wire harness connector
      (to Seat Belt Control ECU)
    4. Reconnect the seat belt control ECU connector.

    Result:  NG

    NG 

    Refer to  4

    Result:  OK

    OK 

    Refer to  3

  3. CHECK HARNESS AND CONNECTOR (+B CIRCUIT) 
    1. Disconnect the seat belt control ECU connector.
      GTY534341Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    2. Measure the voltage according to the value(s) in the table below.

      Standard Voltage

      Tester Connection Condition Specified Condition
      H6-7 (+B) - Body ground Power switch off 11 to 14 V
      TEXT IN ILLUSTRATION

      *a Front view of wire harness connector
      (to Seat Belt Control ECU)
    3. Reconnect the seat belt control ECU connector.

    Result:  OK

    OK 

    PROCEED TO NEXT SUSPECTED AREA SHOWN IN PROBLEM SYMPTOMS TABLE 

    (Refer to Problem Symptoms Table [08/2014 - ] )

    Result:  NG

    NG 

    REPAIR OR REPLACE HARNESS OR CONNECTOR (+B CIRCUIT) 

  4. INSPECT INSTRUMENT PANEL JUNCTION BLOCK ASSEMBLY 
    1. Remove the instrument panel junction block assembly (Refer to Removal [08/2014 - ] ).
      G00561697Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
      TEXT IN ILLUSTRATION

      *a Instrument Panel Junction Block Assembly - -
    2. Measure the resistance according to the value(s) in the table below.

      Standard Resistance

      Tester Connection Condition Specified Condition
      2E-1 - 2B-2 Always 10 kΩ or higher
      2E-1 - 2B-2 When battery voltage applied to terminals 2B-25 and 2B-6 Below 1 Ω
    3. Reinstall the instrument panel junction block assembly.

    Result:  NG

    NG 

    REPLACE INSTRUMENT PANEL JUNCTION BLOCK ASSEMBLY 

    (Refer to Removal [08/2014 - ] )

    Result:  OK

    OK 

    Refer to  5

  5. CHECK HARNESS AND CONNECTOR (INSTRUMENT PANEL JUNCTION BLOCK - SEAT BELT CONTROL ECU) 
    1. Disconnect the instrument panel junction block assembly connector.
    2. Disconnect the seat belt control ECU connector.
    3. Measure the resistance according to the value(s) in the table below.

      Standard Resistance

      Tester Connection Condition Specified Condition
      2B-2 - H7-8 (IG1) Always Below 1 Ω
      2B-2 - Body ground Always 10 kΩ or higher
      H7-8 (IG1) - Body ground Always 10 kΩ or higher
    4. Reconnect the seat belt control ECU connector.
    5. Reconnect the instrument panel junction block assembly connector.

    Result:  NG

    NG 

    REPAIR OR REPLACE HARNESS OR CONNECTOR (INSTRUMENT PANEL JUNCTION BLOCK - SEAT BELT CONTROL ECU) 

    Result:  OK

    OK 

    Refer to  6

  6. CHECK HARNESS AND CONNECTOR (INSTRUMENT PANEL JUNCTION BLOCK ASSEMBLY - BODY GROUND) 
    1. Disconnect the instrument panel junction block assembly connector.
    2. Measure the resistance according to the value(s) in the table below.

      Standard Resistance

      Tester Connection Condition Specified Condition
      2B-6 - Body ground Always Below 1 Ω
    3. Reconnect the instrument panel junction block assembly connector.

    Result:  NG

    NG 

    REPAIR OR REPLACE HARNESS OR CONNECTOR (INSTRUMENT PANEL JUNCTION BLOCK ASSEMBLY - BODY GROUND) 

    Result:  OK

    OK 

    Refer to  7

  7. CHECK HARNESS AND CONNECTOR (INSTRUMENT PANEL JUNCTION BLOCK - POWER MANAGEMENT ECU) 
    1. Disconnect the instrument panel junction block assembly connector.
    2. Disconnect the power management control ECU connector.
    3. Measure the resistance according to the value(s) in the table below.

      Standard Resistance

      Tester Connection Condition Specified Condition
      2B-25 - H4-2 (IG1D) Always Below 1 Ω
      2B-25 - Body ground Always 10 kΩ or higher
      H4-2 (IG1D) - Body ground Always 10 kΩ or higher
    4. Reconnect the power management control ECU connector.
    5. Reconnect the instrument panel junction block assembly connector.

    Result:  OK

    OK 

    REPAIR OR REPLACE HARNESS OR CONNECTOR (INSTRUMENT PANEL JUNCTION BLOCK ASSEMBLY - BATTERY) 

    Result:  NG

    NG 

    REPAIR OR REPLACE HARNESS OR CONNECTOR (INSTRUMENT PANEL JUNCTION BLOCK - POWER MANAGEMENT ECU) 

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