FRONT POWER SEAT CONTROL SYSTEM(w/ Memory) 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.

    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
      Both seat and steering wheel do not operate normally B

    B

    REPLACE MAIN BODY ECU Click here

    A

  3. REPLACE FRONT POWER SEAT SWITCH


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


    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.

    OK

    END (REPLACE FRONT POWER SEAT SWITCH [DRIVER SIDE])

    NG

    REPLACE MAIN BODY ECU (MULTIPLEX NETWORK BODY ECU) Click here

  5. REPLACE MAIN BODY ECU


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


    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 and steering wheel moves to the memorized position Click here.

      OK
      Driver side power seat and steering wheel moves to the memorized position.

    OK

    END (REPLACE MAIN BODY ECU [MULTIPLEX NETWORK BODY ECU])

    NG

    REPLACE CERTIFICATION ECU