REAR POWER SEAT CONTROL SYSTEM Power Seat Position is not Memorized

DESCRIPTION

When either memory 1 switch or memory 2 switch are pressed while pressing the SET switch, or if memory 1 switch or memory 2 switch are pressed within 3 seconds of pressing the SET switch, the rear power seat switch (rear multi operation panel) sends a seat memory switch signal and memorization request signal to the position control ECU assembly via LIN communication. The position control ECU assembly that has received the signal will store the position data of each motor.

CAUTION / NOTICE / HINT

Note


  • The rear power seat control system uses the LIN communication system. First, confirm that there are no malfunctions in the LIN communication system. Refer to How to Proceed with Troubleshooting.

    Click here

  • Initializing the position control ECU assembly will clear the seat position memory.

Tech Tips


  • Make sure to initialize the position control ECU assembly after replacing the seat assembly or any related parts (including removal and installation).

  • Before initializing the seat ECU, make sure that the D/C CUT fuse is normal.

  • When any of the following conditions are met, the seat position Information in the position control ECU assembly will be cleared.


    • The power switch is turned off with any of the seat switches being operated and the D/C CUT fuse removed.

    • The power switch is turned off within 1 second of any of the seat switches being operated with the D/C CUT fuse removed.

PROCEDURE


  1. CHECK VEHICLE CONDITION

    Result
    Result Proceed to
    Rear seat RH malfunction A
    Rear seat LH malfunction B

    B

    CHECK REAR POWER SEAT CONTROL OPERATION Click here

    A

  2. CHECK REAR POWER SEAT CONTROL OPERATION


    1. Check that each function of the power seat operates normally by using the rear power seat switch (rear multi operation panel).

      Click here

      OK
      Each function of the power seat operates normally using the rear power seat switch (multi operation panel).
      Result
      Proceed to
      OK
      NG

    NG

    GO TO PROBLEM SYMPTOMS TABLE Click here

    OK

  3. READ VALUE USING GTS (SET SWITCH, M1 SWITCH, M2 SWITCH)


    1. Connect the GTS to the DLC3.

    2. Turn the power switch on (IG).

    3. Turn the GTS on.

    4. Enter the following menus: Body Electrical / Rear Right Seat / Data List.

    5. Read the Data List according to the display on the GTS.


      Body Electrical > Rear Right Seat > Data List
      Tester Display Measurement Item Range Normal Condition Diagnostic Note
      SET Switch SET switch ON or OFF

      ON: SET switch on

      OFF: SET switch off

      		 -
      M1 Switch M1 switch ON or OFF

      ON: M1 switch on

      OFF: M1 switch off

      		 -
      M2 Switch M2 switch ON or OFF

      ON: M2 switch on

      OFF: M2 switch off

      		 -

      Body Electrical > Rear Right Seat > Data List
      Tester Display
      SET Switch
      M1 Switch
      M2 Switch
      OK
      ON or OFF is displayed on the GTS according to the table above.
      Result
      Proceed to
      OK
      NG

    NG

    REPLACE POSITION CONTROL ECU ASSEMBLY RH Click here

    OK

  4. PERFORM ACTIVE TEST USING GTS (BUZZER)


    1. Connect the GTS to the DLC3.

    2. Turn the power switch on (IG).

    3. Turn the GTS on.

    4. Enter the following menus: Body Electrical / Rear Right Seat / Active Test.

    5. Read the Data List according to the display on the GTS.


      Body Electrical > Rear Right Seat > Active Test
      Tester Display Measurement Item Control Range Diagnostic Note
      Buzzer Buzzer operation OFF/ON -

      Body Electrical > Rear Right Seat > Active Test
      Tester Display
      Buzzer
      OK
      Buzzer sounds normally.
      Result
      Proceed to
      OK
      NG

    OK

    PERFORM INITIALIZATION Click here

    NG

    REPLACE POSITION CONTROL ECU ASSEMBLY RH Click here

  5. CHECK REAR POWER SEAT CONTROL OPERATION


    1. Check that each function of the power seat operates normally by using the rear power seat switch (rear multi operation panel).

      Click here

      OK
      Each function of the power seat operates normally using the rear power seat switch (multi operation panel).
      Result
      Proceed to
      OK
      NG

    NG

    GO TO PROBLEM SYMPTOMS TABLE Click here

    OK

  6. READ VALUE USING GTS (SET SWITCH, M1 SWITCH, M2 SWITCH)


    1. Connect the GTS to the DLC3.

    2. Turn the power switch on (IG).

    3. Turn the GTS on.

    4. Enter the following menus: Body Electrical / Rear Left Seat / Data List.

    5. Read the Data List according to the display on the GTS.


      Body Electrical > Rear Left Seat > Data List
      Tester Display Measurement Item Range Normal Condition Diagnostic Note
      SET Switch SET switch ON or OFF

      ON: SET switch on

      OFF: SET switch off
      M1 Switch M1 switch ON or OFF

      ON: M1 switch on

      OFF: M1 switch off
      M2 Switch M2 switch ON or OFF

      ON: M2 switch on

      OFF: M2 switch off

      Body Electrical > Rear Left Seat > Data List
      Tester Display
      SET Switch
      M1 Switch
      M2 Switch
      OK
      ON or OFF is displayed on the GTS according to the table above.
      Result
      Proceed to
      OK
      NG

    NG

    REPLACE POSITION CONTROL ECU ASSEMBLY LH Click here

    OK

  7. PERFORM ACTIVE TEST USING GTS (BUZZER)


    1. Connect the GTS to the DLC3.

    2. Turn the power switch on (IG).

    3. Turn the GTS on.

    4. Enter the following menus: Body Electrical / Rear Left Seat / Active Test.

    5. Read the Data List according to the display on the GTS.


      Body Electrical > Rear Left Seat > Active Test
      Tester Display Measurement Item Control Range Diagnostic Note
      Buzzer Buzzer operation OFF/ON -

      Body Electrical > Rear Left Seat > Active Test
      Tester Display
      Buzzer
      OK
      Buzzer sounds normally.
      Result
      Proceed to
      OK
      NG

    OK

    PERFORM INITIALIZATION Click here

    NG

    REPLACE POSITION CONTROL ECU ASSEMBLY LH Click here