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

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DTC Code DTC Name
  Wireless-linked Return Function does not Operate
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DESCRIPTION

When a door is unlocked using the wireless unlock function, the certification ECU (smart key ECU assembly) sends a key ID signal to the main body ECU (multiplex network body ECU). When a door is unlocked using the 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 information of the stored key ID is sent to each driving position related control ECU. Each control ECU receives the information and then performs the memory call operation according to predetermined control timing values.

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CAUTION / NOTICE / HINT

Note:

  • 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 of the switches. The seat memory function will not operate unless the switches are released.

  • Before replacing the main body ECU (multiplex network body ECU) or certification ECU (smart key ECU assembly), refer to Service Bulletin.

  • The vehicle battery supplies power to the main body ECU (multiplex network body ECU) via the door control battery. Therefore, before performing this troubleshooting procedure, make sure to perform an on-vehicle inspection to confirm that the main body ECU (multiplex network body ECU) power source circuit is normal.

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PROCEDURE


  1. Click here

    CHECK FRONT POWER SEAT OPERATION


    1. Check the operation of the power seat.

      Click here

    2. Check the seat position memory function.

      Click here

    3. Check the seat position restoration function.

      Click here

    4. Check the operation of memory registration of the memory call function.

      Click here

      Result
      Result Proceed to
      OK A
      NG (Power seat operation) B
      NG (Seat position memory function) C
      NG (Seat position restoration function) D
      NG (Memory registration) E

    • AClick here
    • B

      GO TO PROBLEM SYMPTOMS TABLEClick here

    • C

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

    • D

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

    • E

      GO TO OTHER DIAGNOSIS PROCEDURE (Wireless Transmitter Memory Function does not Operate)Click here

  2. Click here

    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

      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
      Memory call function linked with the wireless unlock function and entry unlock function both do not operate. C

  3. Click here

    CHECK WIRELESS DOOR LOCK CONTROL SYSTEM


    1. Check the wireless unlock function of the wireless door lock control system.

      Click here

      OK
      Wireless unlock function is normal.
      Result
      Proceed to
      OK
      NG

  4. Click here

    CHECK MEMORY CALL FUNCTION (MIRROR OPERATION)


    1. Check the operation of the outer mirrors using the memory call function.

      Click here

      Result
      Result Proceed to
      Outer mirrors operate normally A
      Outer mirrors do not operate normally B

  5. Click here

    REPLACE POSITION CONTROL ECU ASSEMBLY (DRIVER SEAT)


    1. Replace the position control ECU assembly (driver seat) with a new or known good one.

      Click here

      Result
      Proceed to
      NEXT

  6. Click here

    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
      NG

    • OK

      END (POSITION CONTROL ECU ASSEMBLY (DRIVER SEAT) WAS DEFECTIVE)

    • NG

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

  7. Click here

    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.

      Click here

      Result
      Proceed to
      NEXT

  8. Click here

    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
      NG

    • OK

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

    • NG

      REPLACE CERTIFICATION ECU (SMART KEY ECU ASSEMBLY)

  9. Click here

    CHECK SMART ENTRY AND START SYSTEM (for Entry Function)


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

      Click here

      OK
      Entry unlock function is normal.
      Result
      Proceed to
      OK
      NG

  10. Click here

    CHECK MEMORY CALL FUNCTION (MIRROR OPERATION)


    1. Check the operation of the outer mirrors using the memory call function.

      Click here

      Result
      Result Proceed to
      Outer mirrors operate normally A
      Outer mirrors do not operate normally B

  11. Click here

    REPLACE POSITION CONTROL ECU ASSEMBLY (DRIVER SEAT)


    1. Replace the position control ECU assembly (driver seat) with a new or known good one.

      Click here

      Result
      Proceed to
      NEXT

  12. Click here

    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 entry unlock function operates normally.
      Result
      Proceed to
      OK
      NG

    • OK

      END (POSITION CONTROL ECU ASSEMBLY (DRIVER SEAT) WAS DEFECTIVE)

    • NG

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

  13. Click here

    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.

      Click here

      Result
      Proceed to
      NEXT

  14. Click here

    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 entry unlock function operates normally.
      Result
      Proceed to
      OK
      NG

    • OK

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

    • NG

      REPLACE CERTIFICATION ECU (SMART KEY ECU ASSEMBLY)

  15. Click here

    CHECK MEMORY CALL FUNCTION (MIRROR OPERATION)


    1. Check the operation of the outer mirrors using the memory call function.

      Click here

      Result
      Result Proceed to
      Outer mirrors operate normally A
      Outer mirrors do not operate normally B

  16. Click here

    REPLACE POSITION CONTROL ECU ASSEMBLY (DRIVER SEAT)


    1. Replace the position control ECU assembly (driver seat) with a new or known good one.

      Click here

      Result
      Proceed to
      NEXT

  17. Click here

    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 and entry unlock function operate normally.
      Result
      Proceed to
      OK
      NG

    • OK

      END (POSITION CONTROL ECU ASSEMBLY (DRIVER SEAT) WAS DEFECTIVE)

    • NG

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

  18. Click here

    READ VALUE USING GTS (MEMORY CALL REGISTRATION)


    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.


      1. Body Electrical > Main Body > Data List
        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*

        		 -









      • *: Although this item is displayed on the GTS, it is not applicable to this vehicle.


      1. Body Electrical > Main Body > Data List
        Tester Display
        Mem SW No. w/KeyID1
        Mem SW No. w/KeyID2
        Mem SW No. w/KeyID3
        Mem SW No. w/KeyID4
        Mem SW No. w/KeyID5
        Mem SW No. w/KeyID6
        Mem SW No. w/KeyID7










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

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


      1. Body Electrical > Driver Seat > Data List
        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

        		 -




      1. Body Electrical > Driver Seat > Data List
        Tester Display
        Seat Memory No1
        Seat Memory No2





      OK
      A seat position has been memorized for the seat position memory switch linked to the electrical key transmitter sub-assembly. (For example, the value of "Mem SW No. w/KeyID1" is MEM SW1 and the value of "Seat Memory No1" is Mem.)
      Result
      Proceed to
      OK
      NG

  19. Click here

    READ VALUE USING GTS (DRIVER DOOR COURTESY SWITCH)


    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.


      1. Body Electrical > Main Body > Data List
        Tester Display Measurement Item Range Normal Condition Diagnostic Note
        FR Door Courtesy SW Front door courtesy light switch assembly (driver door) signal ON or OFF

        ON: Driver door open

        OFF: Driver door closed

        		 -



      1. Body Electrical > Main Body > Data List
        Tester Display
        FR Door Courtesy SW




      OK
      On the GTS screen, ON or OFF is displayed accordingly.
      Result
      Proceed to
      OK
      NG

  20. Click here

    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.

      Click here

      Result
      Proceed to
      NEXT

  21. Click here

    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 functions linked with the wireless unlock function and entry unlock function operate normally.
      Result
      Proceed to
      OK
      NG

    • OK

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

    • NG

      REPLACE CERTIFICATION ECU (SMART KEY ECU ASSEMBLY)