FRONT POWER SEAT CONTROL SYSTEM (w/ Seat Position Memory System) > Wireless-linked Return Function does not Operate

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DESCRIPTION

When the transmitter is used to unlock the doors, the multiplex network body ECU sends a wireless unlock or entry unlock signal and key recognition code signal to the position control ECU & switch assembly, which records the key recognition code. The position control ECU & switch assembly then memorizes any seat position, memory call operations and memory call commands, and links them to the key recognition code.
When the door is unlocked by the wireless unlock operation:
When the driver side door is opened, the position control ECU & switch receives the door courtesy light switch signal from the multiplex network body ECU. Then the ECU sends the memory call command signals to the appropriate ECU. The ECU that receives the signals then performs the memory call function according to standard control timing*.
When the door is unlocked by the entry unlock operation:
When the driver side door is opened, the position control ECU & switch receives the memory call command signal via the BEAN line from the certification ECU. Then the ECU sends the memory call command signals to the appropriate ECU. The ECU that receives the signals then performs the memory call function according to standard control timing*.

HINT:
*: Standard control timing refers to the controlled timing of the automatic movement of the seat position, mirror position and tilt & telescopic.


INSPECTION PROCEDURE

1.CHECK ENTRY UNLOCK FUNCTION AND WIRELESS UNLOCK FUNCTION

  1. Check that the driver side door unlocks when holding the driver side door outside handle, or when pressing the transmitter's UNLOCK switch.

    OK:
    Driver side door unlocks normally.



NG
GO TO ENTRY AND START SYSTEM OR WIRELESS DOOR LOCK CONTROL SYSTEM
OK


2.CHECK PUSH-BUTTON START FUNCTION (ENGINE SWITCH)

  1. With the engine switch off, turn the engine switch on (ACC) and check that the indicator light on the engine switch illuminates.



NG
GO TO ENTRY AND START SYSTEM
OK


3.CHECK MEMORY CALL FUNCTION (REGISTER RECOGNITION CODE)

  1. While pressing the M1, M2 or M3 switch, press the transmitter's LOCK or UNLOCK switch. Check that the buzzer sounds normally.

    OK:
    Buzzer sounds normally.



NG
REPLACE POSITION CONTROL ECU & SWITCH ASSEMBLY (DRIVER SIDE)
OK


4.CHECK SEAT MEMORY SWITCH FUNCTION (DRIVER SIDE) (SEAT POSITION MEMORY FUNCTION)

  1. Perform a memory operation properly. Check that the buzzer sounds to indicate the completion of the memory operation.

    NOTICE:
    1. The seat position will not be recorded if the SET switch and 2 or more of the memory switches (for example, M1 and M2) are pressed simultaneously.
    2. If a memorizing operation has failed, release all switches. The seat memory function does not operate unless the switches are released.

    OK:
    Seat memory switch function operates normally.



NG
GO TO PROBLEM SYMPTOMS TABLE
OK


5.CHECK SEAT MEMORY SWITCH FUNCTION (DRIVER SIDE) (SEAT RESTORING OPERATION)

  1. Press the M1, M2 or M3 switch and check that the seat moves to a recorded position.

    OK:
    Seat moves to recorded position.



NG
GO TO PROBLEM SYMPTOMS TABLE
OK


6.CHECK MEMORY CALL FUNCTION (SEAT MEMORY CALL)

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

    OK:
    Driver side power seat moves to the memorized position.



NG
REPLACE POSITION CONTROL ECU & SWITCH ASSEMBLY (DRIVER SIDE)
OK

END