REAR POWER SEAT CONTROL SYSTEM Back Door Courtesy Switch Circuit

DESCRIPTION

The fold seat control ECU receives the switch operation signal, driving condition signal and back door open/close signal from the back door lock assembly. The fold seat control ECU actives the rear seat according to these signals.

WIRING DIAGRAM

B005B32E03

PROCEDURE


  1. CHECK BACK DOOR LOCK ASSEMBLY (BACK DOOR COURTESY LIGHT SWITCH)


    1. Check that the back door lock assembly (back door courtesy light switch) is on and off according to the back door operation.

      OK
      Back door lock assembly (back door courtesy light switch) is on and off normally according to the back door operation.
      Result
      Proceed to
      OK
      NG

    NG

    GO TO LIGHTING SYSTEM Click here

    OK

  2. CHECK HARNESS AND CONNECTOR (BACK DOOR LOCK ASSEMBLY - FOLD SEAT CONTROL ECU AND BODY GROUND)


    1. Disconnect the Y12*1 or Y13*2 back door lock assembly connector.


      • *1: w/ Power Back Door System

      • *2: w/o Power Back Door System

    2. Disconnect the h3*1 or i3*2 fold seat control ECU connector.


      • *1: Rear Right Seat

      • *2: Rear Left Seat

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

      Standard Resistance
      w/ Power Back Door System (Rear Right Seat)
      Tester Connection Condition Specified Condition
      Y12-8 (CTY) - h3-19 (BDCY) Always Below 1 Ω
      Y12-7 (E) - Body ground Always Below 1 Ω
      Y12-8 (CTY) or h3-19 (BDCY) - Body ground Always 10 kΩ or higher
      w/o Power Back Door System (Rear Right Seat)
      Tester Connection Condition Specified Condition
      Y13-3 (D+) - h3-19 (BDCY) Always Below 1 Ω
      Y13-1 (ACT-) - Body ground Always Below 1 Ω
      Y13-3 (D+) or h3-19 (BDCY) - Body ground Always 10 kΩ or higher
      w/ Power Back Door System (Rear Left Seat)
      Tester Connection Condition Specified Condition
      Y12-8 (CTY) - i3-19 (BDCY) Always Below 1 Ω
      Y12-7 (E) - Body ground Always Below 1 Ω
      Y12-8 (CTY) or i3-19 (BDCY) - Body ground Always 10 kΩ or higher
      w/o Power Back Door System (Rear Left Seat)
      Tester Connection Condition Specified Condition
      Y13-3 (D+) - i3-19 (BDCY) Always Below 1 Ω
      Y13-1 (ACT-) - Body ground Always Below 1 Ω
      Y13-3 (D+) or i3-19 (BDCY) - Body ground Always 10 kΩ or higher
      Result
      Proceed to
      OK
      NG

    OK

    PROCEED TO NEXT SUSPECTED AREA SHOWN IN PROBLEM SYMPTOMS TABLE Click here

    NG

    REPAIR OR REPLACE HARNESS OR CONNECTOR