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

for Preparation Click here


DESCRIPTION

When a door is unlocked by the wireless unlock function or entry unlock function*1, 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.
  1. *1: w/ Entry Function

INSPECTION PROCEDURE

1.CHECK CAN COMMUNICATION SYSTEM

  1. Use the intelligent tester 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).

  1. Check the seat position memory function (Click here).

  1. Check the seat position restoring function (Click here).

  1. 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 power switch off.

  1. Close and lock all doors.

  1. Unlock the driver door by pressing the unlock switch of the memory call registered key (wireless unlock function).

  1. Unlock the driver door by touching the driver door outside handle with holding the memory call registered key (entry unlock function)*1.

    1. *1: w/ Entry Function

  1. 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
Go to step 10

C
Go to step 16
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).

    Result:
    Result
    		Proceed to
    Outer mirror operates normally
    		A
    Outer mirror does not operate normally
    		B



B
Go to step 8
A


6.REPLACE POSITION CONTROL ECU AND SWITCH ASSEMBLY

  1. Replace the position control ECU and switch assembly (Click here).


NEXT


7.CHECK MEMORY CALL FUNCTION

  1. Perform a seat position memory function (Click here).

  1. Perform a memory call registration function (Click here).

  1. Turn the power switch off.

  1. Close and lock all doors.

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

  1. 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 AND SWITCH ASSEMBLY WAS DEFECTIVE) 

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

  1. Replace the main body ECU (multiplex network body ECU) (Click here).


NEXT


9.CHECK MEMORY CALL FUNCTION

  1. Perform a seat position memory function (Click here).

  1. Perform a memory call registration function (Click here).

  1. Turn the power switch off.

  1. Close and lock all doors.

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

  1. 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) 

10.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


11.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
    		A
    Outer mirror does not operate normally
    		B



B
Go to step 14
A


12.REPLACE POSITION CONTROL ECU AND SWITCH ASSEMBLY

  1. Replace the position control ECU and switch assembly (Click here).


NEXT


13.CHECK MEMORY CALL FUNCTION

  1. Perform a seat position memory function (Click here).

  1. Perform a memory call registration function (Click here).

  1. Turn the power switch off.

  1. Close and lock all doors.

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

  1. 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 AND SWITCH ASSEMBLY WAS DEFECTIVE) 

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

  1. Replace the main body ECU (multiplex network body ECU) (Click here).


NEXT


15.CHECK MEMORY CALL FUNCTION

  1. Perform a seat position memory function (Click here).

  1. Perform a memory call registration function (Click here).

  1. Turn the power switch off.

  1. Close and lock all doors.

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

  1. 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) 

16.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
    		A
    Outer mirror does not operate normally
    		B



B
Go to step 19
A


17.REPLACE POSITION CONTROL ECU AND SWITCH ASSEMBLY

  1. Replace the position control ECU and switch assembly (Click here).


NEXT


18.CHECK MEMORY CALL FUNCTION

  1. Perform a seat position memory function (Click here).

  1. Perform a memory call registration function (Click here).

  1. Turn the power switch off.

  1. Close and lock all doors.

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

  1. 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 AND SWITCH ASSEMBLY WAS DEFECTIVE) 

19.READ VALUE USING INTELLIGENT TESTER (MEMORY CALL REGISTRATION)

  1. Connect the intelligent tester to the DLC3.

  1. Turn the power switch on (IG).

  1. Turn the intelligent tester on.

  1. Enter the following menus: Body / Main Body / Data List.

  1. Read the Data List according to the display on the intelligent tester.

    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
    		-

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

  1. Read the Data List according to the display on the intelligent tester.

    Driver Seat (Position Control ECU and Switch Assembly) 
    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 intelligent tester display, it is confirmed that the memory switches which is linked with key IDs memorize the seat position. (for example, on the intelligent tester 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 INTELLIGENT TESTER (DRIVER DOOR COURTESY SWITCH)

  1. Connect the intelligent tester to the DLC3.

  1. Turn the power switch on (IG).

  1. Turn the intelligent tester on.

  1. Enter the following menus: Body / Main Body / Data List.

  1. Read the Data List according to the display on the intelligent tester.

    Main Body (Main Body ECU (Multiplex Network Body ECU)) 
    Tester Connection
    		Measurement Item/Range
    		Normal Condition
    		Diagnostic Note
    FR Door Courtesy*1
    		Front door courtesy light switch assembly signal / ON or OFF
    		ON: Driver door open
    OFF: Driver door closed
    		-
    FL Door Courtesy*2
    		Front door courtesy light switch assembly signal / ON or OFF
    		ON: Driver door open
    OFF: Driver door closed
    		-

    1. *1: for RHD
    2. *2: for LHD

    OK:
    On the intelligent tester screen, each item changes between ON and OFF according to the above.



NG
GO TO LIGHTING SYSTEM (Door Courtesy Switch Circuit) (Click here)
OK


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

  1. Replace the main body ECU (multiplex network body ECU) (Click here).


NEXT


22.CHECK MEMORY CALL FUNCTION

  1. Perform a seat position memory function (Click here).

  1. Perform a memory call registration function (Click here).

  1. Turn the power switch off.

  1. Close and lock all doors.

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

  1. 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)