FRONT POWER SEAT CONTROL SYSTEM (for RHD) Wireless-linked Return Function does not Operate

DESCRIPTION

When a door is unlocked by the wireless unlock function or entry 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 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.

INSPECTION PROCEDURE

Note

If the main body ECU (multiplex network body ECU) is replaced, refer to the Service Bulletin.

PROCEDURE


  1. CHECK CAN COMMUNICATION SYSTEM


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

      OK
      CAN communication DTC is not output.

    NG

    GO TO CAN COMMUNICATION SYSTEM Click here

    OK

  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 (ENTRY UNLOCK FUNCTION) Click here

    C

    CHECK MEMORY CALL FUNCTION (MIRROR OPERATION) Click here

    A

  4. CHECK WIRELESS UNLOCK FUNCTION


    1. Check the wireless door lock control system 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.

      Result
      Result Proceed to
      Outer mirror operates normally (for Standard Seat Type) A
      Outer mirror operates normally (for Sports Seat Type, Luxury Seat Type) B
      Outer mirror does not operate normally C

    B

    REPLACE POSITION CONTROL ECU ASSEMBLY Click here

    C

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

    A

  6. REPLACE POWER SEAT SWITCH ASSEMBLY


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


    NEXT

  7. CHECK MEMORY CALL FUNCTION


    1. Perform a seat position memory function Click here.

    2. Perform a memory call registration function Click here.

    3. Turn the engine switch off.

    4. Close and lock all doors.

    5. 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.

    6. Open the driver door and check that the driver seat moves to the memorized position Click here.

      OK
      Driver seat moves to the memorized position.

    NG

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

    OK

    END (POWER SEAT SWITCH ASSEMBLY WAS DEFECTIVE)

  8. REPLACE POSITION CONTROL ECU ASSEMBLY


    1. Temporarily replace the position control ECU assembly with a new or normally functioning one.



    NEXT

  9. CHECK MEMORY CALL FUNCTION


    1. Perform a seat position memory function Click here.

    2. Perform a memory call registration function Click here.

    3. Turn the engine switch off.

    4. Close and lock all doors.

    5. 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.

    6. Open the driver door and check that the driver seat moves to the memorized position Click here.

      OK
      Driver seat moves to the memorized position.

    NG

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

    OK

    END (POSITION CONTROL ECU ASSEMBLY WAS DEFECTIVE)

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


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


    NEXT

  11. CHECK MEMORY CALL FUNCTION


    1. Perform a seat position memory function Click here.

    2. Perform a memory call registration function Click here.

    3. Turn the engine switch off.

    4. Close and lock all doors.

    5. 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.

    6. Open the driver door and check that the driver seat moves to the memorized position Click here.

      OK
      Driver seat moves to the memorized position.

    NG

    REPLACE CERTIFICATION ECU (SMART KEY ECU ASSEMBLY)

    OK

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

  12. CHECK ENTRY AND START SYSTEM (ENTRY UNLOCK FUNCTION)


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

      OK
      Entry unlock function is normal.

    NG

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

    OK

  13. CHECK MEMORY CALL FUNCTION (MIRROR OPERATION)


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

      Result
      Result Proceed to
      Outer mirror operates normally (for Standard Seat Type) A
      Outer mirror operates normally (for Sports Seat Type) B
      Outer mirror does not operate normally C

    B

    REPLACE POSITION CONTROL ECU ASSEMBLY Click here

    C

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

    A

  14. REPLACE POWER SEAT SWITCH ASSEMBLY


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


    NEXT

  15. CHECK MEMORY CALL FUNCTION


    1. Perform a seat position memory function Click here.

    2. Perform a memory call registration function Click here.

    3. Turn the engine switch off.

    4. Close and lock all doors.

    5. 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.

    6. Open the driver door and check that the driver seat moves to the memorized position Click here.

      OK
      Driver seat moves to the memorized position.

    NG

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

    OK

    END (POWER SEAT SWITCH ASSEMBLY WAS DEFECTIVE)

  16. REPLACE POSITION CONTROL ECU ASSEMBLY


    1. Temporarily replace the position control ECU assembly with a new or normally functioning one.



    NEXT

  17. CHECK MEMORY CALL FUNCTION


    1. Perform a seat position memory function Click here.

    2. Perform a memory call registration function Click here.

    3. Turn the engine switch off.

    4. Close and lock all doors.

    5. 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.

    6. Open the driver door and check that the driver seat moves to the memorized position Click here.

      OK
      Driver seat moves to the memorized position.

    NG

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

    OK

    END (POSITION CONTROL ECU ASSEMBLY WAS DEFECTIVE)

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


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


    NEXT

  19. CHECK MEMORY CALL FUNCTION


    1. Perform a seat position memory function Click here.

    2. Perform a memory call registration function Click here.

    3. Turn the engine switch off.

    4. Close and lock all doors.

    5. 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.

    6. Open the driver door and check that the driver seat moves to the memorized position Click here.

      OK
      Driver seat moves to the memorized position.

    NG

    REPLACE CERTIFICATION ECU (SMART KEY ECU ASSEMBLY)

    OK

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

  20. CHECK MEMORY CALL FUNCTION (MIRROR OPERATION)


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

      Result
      Result Proceed to
      Outer mirror operates normally (for Standard Seat Type) A
      Outer mirror operates normally (for Sports Seat Type) B
      Outer mirror does not operate normally C

    B

    REPLACE POSITION CONTROL ECU ASSEMBLY Click here

    C

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

    A

  21. REPLACE POWER SEAT SWITCH ASSEMBLY


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


    NEXT

  22. CHECK MEMORY CALL FUNCTION


    1. Perform a seat position memory function Click here.

    2. Perform a memory call registration function Click here.

    3. Turn the engine switch off.

    4. Close and lock all doors.

    5. 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.

    6. Open the driver door and check that the driver seat moves to the memorized position Click here.

      OK
      Driver seat moves to the memorized position.

    NG

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

    OK

    END (POWER SEAT SWITCH ASSEMBLY WAS DEFECTIVE)

  23. REPLACE POSITION CONTROL ECU ASSEMBLY


    1. Temporarily replace the position control ECU assembly with a new or normally functioning one.



    NEXT

  24. CHECK MEMORY CALL FUNCTION


    1. Perform a seat position memory function Click here.

    2. Perform a memory call registration function Click here.

    3. Turn the engine switch off.

    4. Close and lock all doors.

    5. 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.

    6. Open the driver door and check that the driver seat moves to the memorized position Click here.

      OK
      Driver seat moves to the memorized position.

    NG

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

    OK

    END (POSITION CONTROL ECU ASSEMBLY WAS DEFECTIVE)

  25. 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 (Main Body ECU [Multiplex Network Body ECU])
      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

  26. READ VALUE USING GTS (FR DOOR COURTESY)


    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 (Main Body ECU [Multiplex Network Body ECU])
      Tester Display Measurement Item/Range Normal Condition Diagnostic Note
      FR Door Courtesy Front door courtesy light switch assembly signal / ON or OFF

      ON: Driver door open

      OFF: Driver door closed

      		 -
      OK
      On the GTS screen, each item changes between ON and OFF according to the above.

    NG

    GO TO LIGHTING SYSTEM Click here

    OK

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


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


    NEXT

  28. CHECK MEMORY CALL FUNCTION


    1. Perform a seat position memory function Click here.

    2. Perform a memory call registration function Click here.

    3. Turn the engine switch off.

    4. Close and lock all doors.

    5. 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.

    6. Open the driver door and check that the driver seat moves to the memorized position Click here.

      OK
      Driver seat moves to the memorized position.

    NG

    REPLACE CERTIFICATION ECU (SMART KEY ECU ASSEMBLY)

    OK

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