REAR POWER SEAT CONTROL SYSTEM Door Open Linked Operation cannot be Canceled

DESCRIPTION

When the rear seat memory switch's C switch is pressed, a C switch signal is sent from the rear door ECU to the rear power seat switch through CAN communication. Then the rear power seat switch sends the C switch signal to the position control ECU through the LIN line. When the position control ECU receives the C switch signal, the door open linked return operation is stopped.

WIRING DIAGRAM

A000XVZE34
A000XVZE35

PROCEDURE


  1. READ VALUE USING INTELLIGENT TESTER (SEAT MEMORY SWITCH)


    1. Check the Data List for proper functioning of the seat memory switch.

      Rear Left Seat
      Tester Display Measurement Item/Range Normal Condition Diagnostic Note
      Cancel SW Seat memory CAN switch signal / ON or OFF

      ON: Memory CAN switch is ON

      OFF: Memory CAN switch is OFF

      		 -
      Rear Right Seat
      Tester Display Measurement Item/Range Normal Condition Diagnostic Note
      Cancel SW Seat memory CAN switch signal / ON or OFF

      ON: Memory CAN switch is ON

      OFF: Memory CAN switch is OFF

      		 -
      OK
      On tester screen, each item changes between ON and OFF according to above chart.
      Result
      Result Proceed to
      OK (for LH Side) A
      OK (for RH Side) B
      NG (for LH Side) C
      NG (for RH Side) D

      Tech Tips


      • for LH Side (except Ottoman):

        If it is necessary to refer to the rear seat assembly, refer to the following procedures Click here.

      • for LH Side (for Ottoman):

        If it is necessary to refer to the rear seat assembly, refer to the following procedures Click here.

      • for RH Side (except Ottoman):

        If it is necessary to refer to the rear seat assembly, refer to the following procedures Click here.

      • for RH Side (for Ottoman):

        If it is necessary to refer to the rear seat assembly, refer to the following procedures Click here.


    A

    REPLACE POSITION CONTROL ECU LH

    B

    REPLACE POSITION CONTROL ECU RH

    D

    INSPECT REAR SEAT MEMORY SWITCH RH Click here

    C

  2. INSPECT REAR SEAT MEMORY SWITCH LH


    1. A000TJQE03
      *1 Component without harness connected: (Rear Seat Memory Switch)

      Remove the memory switch Click here.

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

      Standard resistance
      Tester Connection Switch Condition Specified Condition
      1 (CAN) - 5 (SGND) C switch pressed Below 1 Ω

    NG

    REPLACE REAR SEAT MEMORY SWITCH LH Click here

    OK

  3. CHECK HARNESS AND CONNECTOR (REAR DOOR ECU LH - REAR SEAT MEMORY SWITCH)


    1. Disconnect the O15 ECU connector.

      A000X6WE07
      *1 Front view of wire harness connector: (to Rear Door ECU LH)
      *2 Front view of wire harness connector: (to Rear Seat Memory Switch LH)

    2. Disconnect the Q7 switch connector.

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

      Standard resistance
      Tester Connection Condition Specified Condition
      O15-18 (CAN) - Q7-1 (CAN) Always Below 1 Ω
      O15-29 (MSWE) - Q7-5 (SGND) Always Below 1 Ω
      O15-18 (CAN) - Body ground Always 10 kΩ or higher
      O15-29 (MSWE) - Body ground Always 10 kΩ or higher

    OK

    REPLACE REAR DOOR ECU LH Click here

    NG

    REPAIR OR REPLACE HARNESS OR CONNECTOR

  4. INSPECT REAR SEAT MEMORY SWITCH RH


    1. A000TJQE04
      *1 Component without harness connected: (Rear Seat Memory Switch)

      Remove the memory switch Click here.

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

      Standard resistance
      Tester Connection Switch Condition Specified Condition
      1 (CAN) - 5 (SGND) C switch pressed Below 1 Ω

    NG

    REPLACE REAR SEAT MEMORY SWITCH RH Click here

    OK

  5. CHECK HARNESS AND CONNECTOR (REAR DOOR ECU RH - REAR SEAT MEMORY SWITCH)


    1. Disconnect the O2 ECU connector.

      A000X6WE08
      *1 Front view of wire harness connector: (to Rear Door ECU RH)
      *2 Front view of wire harness connector: (to Rear Seat Memory Switch RH)

    2. Disconnect the Q2 switch connector.

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

      Standard resistance
      Tester Connection Condition Specified Condition
      O2-18 (CAN) - Q2-1 (CAN) Always Below 1 Ω
      O2-29 (MSWE) - Q2-5 (SGND) Always Below 1 Ω
      O2-18 (CAN) - Body ground Always 10 kΩ or higher
      O2-29 (MSWE) - Body ground Always 10 kΩ or higher

    OK

    REPLACE REAR DOOR ECU RH Click here

    NG

    REPAIR OR REPLACE HARNESS OR CONNECTOR