FRONT POWER SEAT CONTROL SYSTEM(w/ Seat Position Memory System) Wireless Transmitter Memory Function does not Operate

DESCRIPTION

With the engine switch off and the driver door closed, press the transmitter lock or unlock switch while holding a seat memory switch (seat memory switch 1, seat memory switch 2 or seat memory switch 3). Doing so will register the transmitter recognition code into the seat memory switch that was pressed. After the registration is complete, the answer-back buzzer sounds.

CAUTION / NOTICE / HINT

Note


  • The front power seat control system uses the CAN communication system. First, confirm that there is no malfunction in the CAN communication system. Refer to the How to Proceed with Troubleshooting procedure Click here.

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

  • The seat will not return to the memorized position if 2 or more of the seat memory switches (for example, M1 switch and M2 switch) are pressed simultaneously. If a restoring operation has failed, release all switches. The seat memory restoring function does not operate unless the switches are released.

  • Before replacing the main body ECU (multiplex network body ECU) or the certification ECU (smart key ECU assembly), refer to the Entry and Start System (for Entry Function) Click here.

PROCEDURE


  1. CHECK POWER DOOR LOCK CONTROL SYSTEM


    1. Check the manual lock/unlock function by using the door control switch (multiplex network master switch assembly) Click here.

      OK
      Manual lock/unlock function operates normally.

    NG

    GO TO POWER DOOR LOCK CONTROL SYSTEM Click here

    OK

  2. CHECK ENTRY AND START SYSTEM (for Start Function)


    1. Check that the engine starts normally when the engine switch is pressed while carrying the electrical key transmitter sub-assembly and with the brake pedal depressed Click here.

      OK
      Engine starts normally.

    NG

    GO TO ENTRY AND START SYSTEM (for Start Function) Click here

    OK

  3. CHECK SEAT POSITION MEMORY AND RESTORING FUNCTION


    1. Check the seat position memory and restoring functions Click here

      Result
      Result Proceed to
      OK A
      NG (seat position memory function does not operate normally) B
      NG (seat position restoring function does not operate normally) C

    B

    GO TO OTHER DIAGNOSIS PROCEDURE (Power Seat Position is not Memorized)

    C

    GO TO OTHER DIAGNOSIS PROCEDURE (Power Seat does not Return to Memorized Position)

    A

  4. READ VALUE USING GTS (DOOR COURTESY SW)


    1. Connect the GTS to the DLC3.

    2. Turn the engine switch on (IG).

    3. Turn the GTS on.

    4. Enter the following menus: Body Electrical / Main Body / Data List.

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

      Main Body
      Tester Display Measurement Item/Range Normal Condition Diagnostic Note
      FL Door Courtesy SW Front door courtesy light switch assembly LH signal / ON or OFF

      ON: Driver door open

      OFF: Driver door closed

      		 for LHD
      FR Door Courtesy SW Front door courtesy light switch assembly RH signal / ON or OFF

      ON: Driver door open

      OFF: Driver door closed

      		 for RHD
      OK
      On the GTS screen, On or OFF is displayed accordingly.

    NG

    GO TO LIGHTING SYSTEM Click here

    OK

  5. CHECK MEMORY CALL FUNCTION (MEMORY REGISTRATION)


    1. Check the memory registration of the memory call function Click here

      OK
      Memory registration operates normally.

    NG

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

    OK

  6. READ VALUE USING GTS (Mem SW No. w/KeyID)


    1. Connect the GTS to the DLC3.

    2. Turn the engine switch on (IG).

    3. Turn the GTS on.

    4. Enter the following menus: Body Electrical / Main Body / Data List.

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

      Main Body
      Tester Display Measurement Item/Range Normal Condition Diagnostic Note
      Mem SW No. w/KeyID1 Memory switch linked with key ID1 / NONE, MEM SW1, MEM SW2 or MEM SW3

      NONE: No switches linked with key ID1

      MEM SW1: M1 switch linked with key ID1

      MEM SW2: M2 switch linked with key ID1

      MEM SW3: M3 switch linked with key ID1

      		 -
      Mem SW No. w/KeyID2 Memory switch linked with key ID2 / NONE, MEM SW1, MEM SW2 or MEM SW3

      NONE: No switches linked with key ID2

      MEM SW1: M1 switch linked with key ID2

      MEM SW2: M2 switch linked with key ID2

      MEM SW3: M3 switch linked with key ID2

      		 -
      Mem SW No. w/KeyID3 Memory switch linked with key ID3 / NONE, MEM SW1, MEM SW2 or MEM SW3

      NONE: No switches linked with key ID3

      MEM SW1: M1 switch linked with key ID3

      MEM SW2: M2 switch linked with key ID3

      MEM SW3: M3 switch linked with key ID3

      		 -
      Mem SW No. w/KeyID4 Memory switch linked with key ID4 / NONE, MEM SW1, MEM SW2 or MEM SW3

      NONE: No switches linked with key ID4

      MEM SW1: M1 switch linked with key ID4

      MEM SW2: M2 switch linked with key ID4

      MEM SW3: M3 switch linked with key ID4

      		 -
      Mem SW No. w/KeyID5 Memory switch linked with key ID5 / NONE, MEM SW1, MEM SW2 or MEM SW3

      NONE: No switches linked with key ID5

      MEM SW1: M1 switch linked with key ID5

      MEM SW2: M2 switch linked with key ID5

      MEM SW3: M3 switch linked with key ID5

      		 -
      Mem SW No. w/KeyID6 Memory switch linked with key ID6 / NONE, MEM SW1, MEM SW2 or MEM SW3

      NONE: No switches linked with key ID6

      MEM SW1: M1 switch linked with key ID6

      MEM SW2: M2 switch linked with key ID6

      MEM SW3: M3 switch linked with key ID6

      		 -
      Mem SW No. w/KeyID7 Memory switch linked with key ID7 / NONE, MEM SW1, MEM SW2 or MEM SW3

      NONE: No switches linked with key ID7

      MEM SW1: M1 switch linked with key ID7

      MEM SW2: M2 switch linked with key ID7

      MEM SW3: M3 switch linked with key ID7

      		 -
      OK
      A seat position memory switch is linked to the electrical key transmitter sub-assembly.
      Result:
      Result Proceed to
      OK A
      NG (for LHD) B
      NG (for RHD) C

    B

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

    C

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

    A

  7. CHECK MEMORY CALL FUNCTION (MEMORY REGISTRATION AND AUTOMATIC MEMORY CALL FUNCTION)


    1. Check the memory registration and automatic memory call function of the memory call function Click here.

      OK
      Memory registration and automatic memory call function operates normally.

    OK

    USE SIMULATION METHOD TO CHECK Click here

    NG

    GO TO OTHER DIAGNOSIS PROCEDURE (Wireless-linked Return Function does not Operate) Click here

  8. REPLACE MAIN BODY ECU (MULTIPLEX NETWORK BODY ECU)


    1. Replace the main body ECU (multiplex network body ECU) with a new or known good one.



    NEXT

  9. CHECK MEMORY CALL FUNCTION (MEMORY REGISTRATION)


    1. Check the memory registration of the memory call function Click here

      OK
      Memory registration operates normally.

    OK

    END (MAIN BODY ECU (MULTIPLEX NETWORK BODY ECU) WAS DEFECTIVE)

    NG

  10. REPLACE FRONT POWER SEAT SWITCH


    1. Replace the front power seat switch LH*1, RH*2 with a new or known good one Click here.

      *1: for LHD

      *2: for RHD


    NEXT

  11. CHECK MEMORY CALL FUNCTION (MEMORY REGISTRATION)


    1. Check the memory registration of the memory call function Click here.

      OK
      Memory registration operates normally.

    OK

    END (FRONT POWER SEAT SWITCH WAS DEFECTIVE)

    NG

    REPLACE CERTIFICATION ECU (SMART KEY ECU ASSEMBLY)