FRONT POWER SEAT CONTROL SYSTEM Wireless-linked Return Function does not Operate

DTC Code DTC Name
Wireless-linked Return Function does not Operate

DESCRIPTION

When a door is unlocked, the certification ECU sends a door unlock signal and key ID signal to the main body ECU (multiplex network body ECU). When the main body ECU (multiplex network body ECU) receives the door unlock signal, it stores the key ID. When the driver door is opened, the memory call and memory command information of the stored key ID is sent to each driving position related control ECU. Each control ECU receives the memory commands and performs the memory call operation according to predetermined control timing values.

CAUTION / NOTICE / HINT

Note:

First perform the communication function inspections in How to Proceed with Troubleshooting to confirm that there are no CAN communication malfunctions before troubleshooting this symptom.

PROCEDURE

  1. CHECK MEMORY CALL MEMORY FUNCTION

    1. While pressing the M1 switch or M2 switch, press the manual lock or unlock switch. Then check that the buzzer sounds for 0.5 seconds

      Click here

      OK

      Buzzer sounds normally.

    Result

    Result

    OK

    NG
    NG

    GO TO PROBLEM SYMPTOMS TABLE (Wireless Transmitter Memory Function does not Operate)

    Click here

    OK

  2. CONFIRM TROUBLE AREAS

    1. Confirm which parts do not operate normally during an automatic memory call operation.

    Result

    Result

    Proceed to

    Only seat does not operate normally

    A

    Seat, steering wheel and outer mirrors do not operate normally

    B
    B

    REPLACE MAIN BODY ECUClick here

    A

  3. REPLACE FRONT POWER SEAT SWITCH LH

    1. Temporarily replace the front power seat switch LH with a new or normally functioning one

      Click here

    Result

    Result

    NEXT
    NEXT

  4. CHECK MEMORY CALL FUNCTION

    1. With a recognition code stored in memory, open the driver door after performing an entry unlock operation or pressing the transmitter unlock switch. Check that the driver side power seat moves to the memorized position

      Click here

      OK

      Driver side power seat moves to the memorized position.

    Result

    Result

    OK

    NG
    OK

    END (FRONT POWER SEAT SWITCH LH IS DEFECTIVE)

    NG

    REPLACE MAIN BODY ECU (MULTIPLEX NETWORK BODY ECU)

    Click hereClick here

  5. REPLACE MAIN BODY ECU

    1. Temporarily replace the main body ECU with a new or normally functioning one

      Click hereClick here

    Result

    Result

    NEXT
    NEXT

  6. CHECK MEMORY CALL FUNCTION

    1. With a recognition code stored in memory, open the driver door after performing an entry unlock operation or pressing the transmitter unlock switch. Check that the driver side power seat, steering wheel and outer mirrors moves to the memorized position

      Click here

      OK

      Driver side power seat, steering wheel and outer mirrors moves to the memorized position.

    Result

    Result

    OK

    NG
    OK

    END (MAIN BODY ECU [MULTIPLEX NETWORK BODY ECU] IS DEFECTIVE)

    NG

    REPLACE CERTIFICATION ECU