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

DESCRIPTION

When a door is unlocked using the wireless unlock function or smart key unlock function, the certification ECU (smart key ECU assembly) 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 front power seat switch. Front power seat switch receives the memory commands and performs the memory call operation according to predetermined control timing values.

CAUTION / NOTICE / HINT

Note

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 CAN COMMUNICATION SYSTEM


    1. Use the GTS to check if the CAN communication system is functioning normally.


      OK
      CAN communication DTC is not output.
      Result
      Result Proceed to
      OK A
      NG (for LHD (w/ Central Gateway ECU)) B
      NG (for LHD (w/o Central Gateway ECU)) C
      NG (for RHD (w/ Central Gateway ECU)) D
      NG (for RHD (w/o Central Gateway ECU)) E

    B

    GO TO CAN COMMUNICATION SYSTEM Click here

    C

    GO TO CAN COMMUNICATION SYSTEM Click here

    D

    GO TO CAN COMMUNICATION SYSTEM Click here

    E

    GO TO CAN COMMUNICATION SYSTEM Click here

    A

  2. CHECK FRONT POWER SEAT CONTROL SYSTEM


    1. Check the power seat control function Click here.

    2. Check the seat position memory function Click here.

    3. Check the seat position restoring function Click here.

    4. Check the memory call registration function Click here.

      Result
      Result Proceed to
      OK A
      NG (power seat control function) B
      NG (seat position memory function) C
      NG (seat position restoring function) D
      NG (memory call registration function) E

    B

    GO TO PROBLEM SYMPTOMS TABLE Click here

    C

    GO TO OTHER FLOW CHART (Power Seat Position is not Memorized) Click here

    D

    GO TO OTHER FLOW CHART (Power Seat does not Return to Memorized Position) Click here

    E

    GO TO OTHER FLOW CHART (Wireless Transmitter Memory Function does not Operate) Click here

    A

  3. CHECK MEMORY CALL FUNCTION (WIRELESS UNLOCK OR ENTRY UNLOCK)


    1. Turn the engine switch off.

    2. Close and lock all doors.

    3. Unlock the driver door by pressing the unlock switch of the memory call registered key or touching the driver door outside handle while holding the memory call registered key.

    4. Open the driver door and check that the driver seat moves to the memorized position.

      Result
      Result Proceed to
      Memory call function linked with the wireless unlock function does not operate. A
      Memory call function linked with the entry unlock function does not operate. B
      Both memory call function linked with the wireless unlock function and entry unlock function do not operate. C

    B

    CHECK ENTRY AND START SYSTEM (for Entry Function) Click here

    C

    CHECK MEMORY CALL FUNCTION (MIRROR OPERATION) Click here

    A

  4. CHECK WIRELESS UNLOCK FUNCTION


    1. Check the wireless unlock function Click here.

      OK
      Wireless unlock function is normal.

    NG

    GO TO WIRELESS DOOR LOCK CONTROL SYSTEM Click here

    OK

  5. CHECK MEMORY CALL FUNCTION (MIRROR OPERATION)


    1. Perform the memory call function and check the outer mirror operation Click here.

      OK
      Outer mirror operates normally.

    NG

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

    OK

  6. REPLACE FRONT POWER SEAT SWITCH


    1. Temporarily replace the front power seat switch LH*1, RH*2 with a new or normally functioning one Click here.

      *1: for LHD

      *2: for RHD


    NEXT

  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 call function linked with the wireless unlock function operates normally.

    OK

    END (FRONT POWER SEAT SWITCH WAS DEFECTIVE)

    NG

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


    1. Temporarily replace the main body ECU (multiplex network body ECU) with a new one.



    NEXT

  9. 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 call function linked with the wireless unlock function operates normally.

    OK

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

    NG

    REPLACE CERTIFICATION ECU (SMART KEY ECU ASSEMBLY)

  10. CHECK ENTRY AND START SYSTEM (for Entry Function)


    1. Check the entry unlock function of the entry and start system (for entry function) Click here.

      OK
      Entry unlock function is normal.

    NG

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

    OK

  11. CHECK MEMORY CALL FUNCTION (MIRROR OPERATION)


    1. Perform the memory call function and check the outer mirror operation Click here.

      OK
      Outer mirror operates normally.
      Result
      Result Proceed to
      OK A
      NG B

    B

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

    A

  12. REPLACE FRONT POWER SEAT SWITCH


    1. Temporarily replace the front power seat switch LH*1, RH*2 with a new or normally functioning one Click here.

      *1: for LHD

      *2: for RHD


    NEXT

  13. 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 call function linked with the wireless unlock function operates normally.
      Result:
      Result Proceed to
      OK A
      NG (for LHD) B
      NG (for RHD C

    A

    END (FRONT POWER SEAT SWITCH WAS DEFECTIVE)

    B

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

    C

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

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


    1. Temporarily replace the main body ECU (multiplex network body ECU) with a new one.



    NEXT

  15. 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 call function linked with the wireless unlock function operates normally.

    OK

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

    NG

    REPLACE CERTIFICATION ECU (SMART KEY ECU ASSEMBLY)

  16. CHECK MEMORY CALL FUNCTION (MIRROR OPERATION)


    1. Perform the memory call function and check the outer mirror operation Click here.

      OK
      Outer mirror operates normally.

    NG

    READ VALUE USING GTS (MEM SW NO. w/ KEY ID) Click here

    OK

  17. REPLACE FRONT POWER SEAT SWITCH


    1. Temporarily replace the front power seat switch LH*1, RH*2 with a new or normally functioning one Click here.

      *1: for LHD

      *2: for RHD


    NEXT

  18. 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 call function linked with the wireless unlock function operates normally.
      Result Proceed to
      OK A
      NG (for LHD) B
      NG (for RHD) C

    A

    END (FRONT POWER SEAT SWITCH WAS DEFECTIVE)

    B

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

    C

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

  19. READ VALUE USING GTS (MEM SW NO. w/ KEY ID)


    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

      		 -

    6. Enter the following menus: Body Electrical / Driver Seat / Data List.

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

      Driver Seat
      Tester Display Measurement Item/Range Normal Condition Diagnostic Note
      Seat Memory No1 Seat position memorized with M1 switch / Mem or Not Mem

      Mem: Memorized

      Not Mem: Not memorized

      		 -
      Seat Memory No2 Seat position memorized with M2 switch / Mem or Not Mem

      Mem: Memorized

      Not Mem: Not memorized

      		 -
      Seat Memory No3 Seat position memorized with M3 switch / Mem or Not Mem

      Mem: Memorized

      Not Mem: Not memorized

      		 -
      OK
      On the GTS display, it is confirmed that the memory switches which are linked with key IDs memorize the seat position (for example, on the GTS display, "Mem SW No. w/KeyID1" displays "MEM SW1" and "Seat Memory No1" displays "Mem").

    NG

    PERFORM MEMORY CALL REGISTRATION Click here

    OK

  20. 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, each item changes between ON and OFF according to the above.

    NG

    GO TO LIGHTING SYSTEM Click here

    OK

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


    1. Temporarily replace the main body ECU (multiplex network body ECU) with a new one.



    NEXT

  22. 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 call function linked with the wireless unlock function operates normally.

    OK

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

    NG

    REPLACE CERTIFICATION ECU (SMART KEY ECU ASSEMBLY)