EASY ACCESS BUCKLE SYSTEM Illumination Circuit

DESCRIPTION

The position control ECU assembly sends buckle illumination signals according to whether the doors are opened/closed and whether the seat belt is fastened/unfastened to the tongue plate.

WIRING DIAGRAM


  1. for Driver Side

    B006BA2E04
    *a for LHD
    *b BCLL
    *c Front Seat Inner Belt Assembly LH
    *d Position Control ECU Assembly
    B006BA2E03
    *a for RHD
    *b BCLL
    *c Front Seat Inner Belt Assembly RH
    *d Position Control ECU Assembly

  2. for Front Passenger Side

    B006BA2E09
    *a for LHD
    *b BCLL
    *c Front Seat Inner Belt Assembly RH
    *d No. 2 Position Control ECU Assembly
    B006BA2E10
    *a for RHD
    *b BCLL
    *c Front Seat Inner Belt Assembly LH
    *d No. 2 Position Control ECU Assembly

CAUTION / NOTICE / HINT

Note

Perform the initialization procedure and stored memory will be reset.

Tech Tips

After replacing the position control ECU assembly, seat assembly and parts (including removal and installation), initialize the position control ECU assembly.

PROCEDURE


  1. CHECK PROBLEM SYMPTOMS

    Result
    Result Proceed to
    for Driver Side A
    for Front Passenger Side B

    B

    CHECK VEHICLE CONDITION Click here

    A

  2. CHECK VEHICLE CONDITION


    1. Check vehicle condition.

      Result
      Proceed to
      for LHD
      for RHD

    for RHD

    PERFORM ACTIVE TEST USING GTS (BUCKLE LIGHTING) Click here

    for LHD

  3. PERFORM ACTIVE TEST USING GTS (BUCKLE LIGHTING)


    1. Connect the GTS to the DLC3.

    2. Turn the engine switch on (IG).

    3. Turn the GTS on.

    4. Enter the following menus: Body Electrical / Driver Seat / Active Test.

    5. Perform Active Test according to the display on the GTS.


      Body Electrical > Driver Seat > Active Test
      Tester Display Measurement Item Control Range Diagnostic Note
      Buckle Lighting Perform the Active Test and check that the LED illuminates/turns off. OFF/ON -

      Body Electrical > Driver Seat > Active Test
      Tester Display
      Buckle Lighting
      OK
      The buckle illumination illuminates/turns off normally in response to the GTS operation.
      Result
      Proceed to
      OK
      NG

    OK

    REPLACE POSITION CONTROL ECU ASSEMBLY Click here

    NG

  4. INSPECT FRONT SEAT INNER BELT ASSEMBLY LH (BUCKLE ILLUMINATION)


    1. Remove the front seat inner belt assembly LH (BUCKLE ILLUMINATION).

      Click here

    2. Inspect the front seat inner belt assembly LH (BUCKLE ILLUMINATION).

      Click here

      Result
      Proceed to
      OK
      NG

    NG

    REPLACE FRONT SEAT INNER BELT ASSEMBLY LH Click here

    OK

  5. CHECK HARNESS AND CONNECTOR (POSITION CONTROL ECU ASSEMBLY - FRONT SEAT INNER BELT ASSEMBLY LH (BUCKLE ILLUMINATION))


    1. Disconnect the Q27 position control ECU assembly connector.

    2. Disconnect the Q39 front seat inner belt assembly LH (buckle illumination) connector.

    3. Measure the resistance according to the value(s) in the table below.

      Standard Resistance
      Tester Connection Condition Specified Condition
      Q27-23 (BCLL) - Q39-1 Always Below 1 Ω
      Q27-23 (BCLL) or Q39-1 - Other terminals and body ground Always 10 kΩ or higher
      Q39-6 - body ground Always Below 1 Ω
      Result
      Proceed to
      OK
      NG

    OK

    REPLACE POSITION CONTROL ECU ASSEMBLY Click here

    NG

    REPAIR OR REPLACE HARNESS OR CONNECTOR

  6. PERFORM ACTIVE TEST USING GTS (BUCKLE LIGHTING)


    1. Connect the GTS to the DLC3.

    2. Turn the engine switch on (IG).

    3. Turn the GTS on.

    4. Enter the following menus: Body Electrical / Driver Seat / Active Test.

    5. Perform Active Test according to the display on the GTS.


      Body Electrical > Driver Seat > Active Test
      Tester Display Measurement Item Control Range Diagnostic Note
      Buckle Lighting Perform the Active Test and check that the LED illuminates/turns off. OFF/ON -

      Body Electrical > Driver Seat > Active Test
      Tester Display
      Buckle Lighting
      OK
      The buckle illumination illuminates/turns off normally in response to the GTS operation.
      Result
      Proceed to
      OK
      NG

    OK

    REPLACE POSITION CONTROL ECU ASSEMBLY Click here

    NG

  7. INSPECT FRONT SEAT INNER BELT ASSEMBLY RH (BUCKLE ILLUMINATION)


    1. Remove the front seat inner belt assembly RH (BUCKLE ILLUMINATION).

      Click here

    2. Inspect the front seat inner belt assembly RH (BUCKLE ILLUMINATION).

      Click here

      Result
      Proceed to
      OK
      NG

    NG

    REPLACE FRONT SEAT INNER BELT ASSEMBLY RH Click here

    OK

  8. CHECK HARNESS AND CONNECTOR (POSITION CONTROL ECU ASSEMBLY - FRONT SEAT INNER BELT ASSEMBLY RH (BUCKLE ILLUMINATION))


    1. Disconnect the Q7 position control ECU assembly connector.

    2. Disconnect the Q16 front seat inner belt assembly RH (buckle illumination) connector.

    3. Measure the resistance according to the value(s) in the table below.

      Standard Resistance
      Tester Connection Condition Specified Condition
      Q7-23 (BCLL) - Q16-1 Always Below 1 Ω
      Q7-23 (BCLL) or Q16-1 - Other terminals and body ground Always 10 kΩ or higher
      Q16-6 - body ground Always Below 1 Ω
      Result
      Proceed to
      OK
      NG

    OK

    REPLACE POSITION CONTROL ECU ASSEMBLY Click here

    NG

    REPAIR OR REPLACE HARNESS OR CONNECTOR

  9. CHECK VEHICLE CONDITION


    1. Check vehicle condition.

      Result
      Proceed to
      for LHD
      for RHD

    for RHD

    PERFORM ACTIVE TEST USING GTS (BUCKLE LIGHTING) Click here

    for LHD

  10. PERFORM ACTIVE TEST USING GTS (BUCKLE LIGHTING)


    1. Connect the GTS to the DLC3.

    2. Turn the engine switch on (IG).

    3. Turn the GTS on.

    4. Enter the following menus: Body Electrical / Passenger Seat / Active Test.

    5. Perform Active Test according to the display on the GTS.


      Body Electrical > Passenger Seat > Active Test
      Tester Display Measurement Item Control Range Diagnostic Note
      Buckle Lighting Perform the Active Test and check that the LED illuminates/turns off. OFF/ON -

      Body Electrical > Passenger Seat > Active Test
      Tester Display
      Buckle Lighting
      OK
      The buckle illumination illuminates/turns off normally in response to the GTS operation.
      Result
      Proceed to
      OK
      NG

    OK

    REPLACE NO. 2 POSITION CONTROL ECU ASSEMBLY Click here

    NG

  11. INSPECT FRONT SEAT INNER BELT ASSEMBLY RH (BUCKLE ILLUMINATION)


    1. Remove the front seat inner belt assembly RH (BUCKLE ILLUMINATION).

      Click here

    2. Inspect the front seat inner belt assembly RH (BUCKLE ILLUMINATION).

      Click here

      Result
      Proceed to
      OK
      NG

    NG

    REPLACE FRONT SEAT INNER BELT ASSEMBLY RH Click here

    OK

  12. CHECK HARNESS AND CONNECTOR (NO. 2 POSITION CONTROL ECU ASSEMBLY - FRONT SEAT INNER BELT ASSEMBLY LH (BUCKLE ILLUMINATION))


    1. Disconnect the Q7 No. 2 position control ECU assembly connector.

    2. Disconnect the Q16 front seat inner belt assembly RH (buckle illumination) connector.

    3. Measure the resistance according to the value(s) in the table below.

      Standard Resistance
      Tester Connection Condition Specified Condition
      Q7-23 (BCLL) - Q16-1 Always Below 1 Ω
      Q7-23 (BCLL) or Q16-1 - Other terminals and body ground Always 10 kΩ or higher
      Q16-6 - body ground Always Below 1 Ω
      Result
      Proceed to
      OK
      NG

    OK

    REPLACE NO. 2 POSITION CONTROL ECU ASSEMBLY Click here

    NG

    REPAIR OR REPLACE HARNESS OR CONNECTOR

  13. PERFORM ACTIVE TEST USING GTS (BUCKLE LIGHTING)


    1. Connect the GTS to the DLC3.

    2. Turn the engine switch on (IG).

    3. Turn the GTS on.

    4. Enter the following menus: Body Electrical / Passenger Seat / Active Test.

    5. Perform Active Test according to the display on the GTS.


      Body Electrical > Passenger Seat > Active Test
      Tester Display Measurement Item Control Range Diagnostic Note
      Buckle Lighting Perform the Active Test and check that the LED illuminates/turns off. OFF/ON -

      Body Electrical > Passenger Seat > Active Test
      Tester Display
      Buckle Lighting
      OK
      The buckle illumination illuminates/turns off normally in response to the GTS operation.
      Result
      Proceed to
      OK
      NG

    OK

    REPLACE NO. 2 POSITION CONTROL ECU ASSEMBLY Click here

    NG

  14. INSPECT FRONT SEAT INNER BELT ASSEMBLY LH (BUCKLE ILLUMINATION)


    1. Remove the front seat inner belt assembly LH (BUCKLE ILLUMINATION).

      Click here

    2. Inspect the front seat inner belt assembly LH (BUCKLE ILLUMINATION).

      Click here

      Result
      Proceed to
      OK
      NG

    NG

    REPLACE FRONT SEAT INNER BELT ASSEMBLY LH Click here

    OK

  15. CHECK HARNESS AND CONNECTOR (NO. 2 POSITION CONTROL ECU ASSEMBLY - FRONT SEAT INNER BELT ASSEMBLY LH (BUCKLE ILLUMINATION))


    1. Disconnect the Q27 No. 2 position control ECU assembly connector.

    2. Disconnect the Q39 front seat inner belt assembly LH (buckle illumination) connector.

    3. Measure the resistance according to the value(s) in the table below.

      Standard Resistance
      Tester Connection Condition Specified Condition
      Q27-23 (BCLL) - Q39-1 Always Below 1 Ω
      Q27-23 (BCLL) or Q39-1 - Other terminals and body ground Always 10 kΩ or higher
      Q39-6 - body ground Always Below 1 Ω
      Result
      Proceed to
      OK
      NG

    OK

    REPLACE NO. 2 POSITION CONTROL ECU ASSEMBLY Click here

    NG

    REPAIR OR REPLACE HARNESS OR CONNECTOR