Power Seat Position is not Memorized (07/2015 -): Procedure

1. Check that each function of the power seat operates normally by using the front power seat switch LH or front power seat switch RH (Refer to OPERATION CHECK (07/2015 -) ).

   OK

   Each function of the power seat operates normally using the front power seat switch LH or front power seat switch RH.

   Result

   Result	Proceed to
   OK (for Driver)	A
   OK (for Front Passenger)	B
   NG	C

Result:  B

B 

See step  10

Result:  C

C 

GO TO PROBLEM SYMPTOMS TABLE 

(Refer to PROBLEM SYMPTOMS TABLE (07/2015 -) )

Result:  A

A 

See step  2

1. Connect the Techstream to the DLC3.
2. Turn the engine switch on (IG).
3. Turn the Techstream on.
4. Enter the following menus: Body Electrical / Mirror L / Data List
5. Read the Data List according to the display on the Techstream.
   MIRROR L
   
   

   Tester Display	Measurement Item/Range	Normal Condition	Diagnostic Note
   Seat Memory Switch1	M1 switch / ON or OFF	ON: M1 switch on OFF: M1 switch off	-
   Seat Memory Switch2	M2 switch / ON or OFF	ON: M2 switch on OFF: M2 switch off	-
   Seat Memory Switch3	M3 switch / ON or OFF	ON: M3 switch on OFF: M3 switch off	-
   Seat Memory Set SW	SET switch / ON or OFF	ON: SET switch on OFF: SET switch off	-

   OK

   ON or OFF is displayed on the Techstream according to the table above.

Result:  NG

NG 

See step  8

Result:  OK

OK 

See step  3

1. Connect the Techstream to the DLC3.
2. Turn the engine switch on (IG).
3. Turn the Techstream on.
4. Enter the following menus: Body Electrical / Driver Seat / Data List.
5. Read the Data List according to the display on the Techstream.
   DRIVER SEAT
   
   

   Tester Display	Test Part	Control Range	Diagnostic Note
   Buzzer	Buzzer operation	OFF/ON	-

   OK

   Buzzer sounds normally.

Result:  NG

NG 

REPLACE FRONT POWER SEAT SWITCH LH 

(Refer to REMOVAL (07/2015 -) )

Result:  OK

OK 

See step  4

1. Replace the outer mirror control ECU assembly (for driver) (Refer to REMOVAL (07/2015 -) ).

Result:  NEXT

NEXT 

See step  5

1. Store a seat position in memory and check that the buzzer sounds to indicate that a position has been stored (Refer to OPERATION CHECK (07/2015 -) ).
   NOTE:

   • The seat position will not be recorded 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.

   OK

   Seat position memory function operates normally.

Result:  OK

OK 

END (OUTER MIRROR CONTROL ECU ASSEMBLY (FOR DRIVER) WAS DEFECTIVE) 

Result:  NG

NG 

See step  6

1. Replace the front power seat switch LH (Refer to REMOVAL (07/2015 -) ).

Result:  NEXT

NEXT 

See step  7

1. Store a seat position in memory and check that the buzzer sounds to indicate that a position has been stored (Refer to OPERATION CHECK (07/2015 -) ).
   NOTE:

   • The seat position will not be recorded 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.

   OK

   Seat position memory function operates normally.

Result:  OK

OK 

END (FRONT POWER SEAT SWITCH LH WAS DEFECTIVE) 

Result:  NG

NG 

REPLACE MAIN BODY ECU (MULTIPLEX NETWORK BODY ECU) 

(Refer to REMOVAL (07/2015 -) )

1. Remove the seat memory switch (for driver) (Refer to REMOVAL (07/2015 -) ).

   Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

2. Measure the resistance according to the value(s) in the table below.

   Standard Resistance

   Tester Connection	Condition	Specified Condition
   1 - 5	M1 switch is pressed	Below 1 Ω
   	M1 switch is not pressed	10 kΩ or higher
   2 - 5	M2 switch is pressed	Below 1 Ω
   	M2 switch is not pressed	10 kΩ or higher
   3 - 5	M3 switch is pressed	Below 1 Ω
   	M3 switch is not pressed	10 kΩ or higher
   4 - 5	SET switch is pressed	Below 1 Ω
   	SET switch is not pressed	10 kΩ or higher

   TEXT IN ILLUSTRATION
   
   

   *1	M1 Switch
   *2	M2 Switch
   *3	M3 Switch
   *4	SET Switch
   *a	Component without harness connected (Seat Memory Switch (for Driver)

Result:  NG

NG 

REPLACE SEAT MEMORY SWITCH (FOR DRIVER) 

(Refer to REMOVAL (07/2015 -) )

Result:  OK

OK 

See step  9

1. Disconnect the M9 outer mirror control ECU assembly (for driver) connector.
2. Measure the resistance according to the value(s) in the table below.

   Standard Resistance

   Tester Connection	Condition	Specified Condition
   M9-2 (M1) - M10-1 (1)	Always	Below 1 Ω
   M9-3 (M2) - M10-2 (2)	Always	Below 1 Ω
   M9-4 (MSWE) - M10-3 (3)	Always	Below 1 Ω
   M9-1 (MM) - M10-4 (MMRY)	Always	Below 1 Ω
   M9-7 (GND) - Body ground	Always	Below 1 Ω
   M10-5 (E) - Body ground	Always	Below 1 Ω
   M9-2 (M1) - Body ground	Always	10 kΩ or higher
   M9-3 (M2) - Body ground	Always	10 kΩ or higher
   M9-4 (MSWE) - Body ground	Always	10 kΩ or higher
   M9-1 (MM) - Body ground	Always	10 kΩ or higher

Result:  OK

OK 

REPLACE OUTER MIRROR CONTROL ECU ASSEMBLY (FOR DRIVER) 

(Refer to REMOVAL (07/2015 -) )

Result:  NG

NG 

REPAIR OR REPLACE HARNESS OR CONNECTOR 

1. Connect the Techstream to the DLC3.
2. Turn the engine switch on (IG).
3. Turn the Techstream on.
4. Enter the following menus: Body Electrical / Mirror R / Data List
5. Read the Data List according to the display on the Techstream.
   MIRROR R
   
   

   Tester Display	Measurement Item/Range	Normal Condition	Diagnostic Note
   Seat Memory Switch1	M1 switch / ON or OFF	ON: M1 switch on OFF: M1 switch off	-
   Seat Memory Switch2	M2 switch / ON or OFF	ON: M2 switch on OFF: M2 switch off	-
   Seat Memory Switch3	M3 switch / ON or OFF	ON: M3 switch on OFF: M3 switch off	-
   Seat Memory Set SW	SET switch / ON or OFF	ON: SET switch on OFF: SET switch off	-

   OK

   ON or OFF is displayed on the Techstream according to the table above.

Result:  NG

NG 

See step  16

Result:  OK

OK 

See step  11

1. Connect the Techstream to the DLC3.
2. Turn the engine switch on (IG).
3. Turn the Techstream on.
4. Enter the following menus: Body Electrical / Passenger Seat / Data List.
5. Read the Data List according to the display on the Techstream.
   PASSENGER SEAT
   
   

   Tester Display	Test Part	Control Range	Diagnostic Note
   Buzzer	Buzzer operation	OFF/ON	-

   OK

   Buzzer sounds normally.

Result:  NG

NG 

REPLACE FRONT POWER SEAT SWITCH RH 

(Refer to REMOVAL (07/2015 -) )

Result:  OK

OK 

See step  12

1. Replace the outer mirror control ECU assembly (for front passenger) (Refer to REMOVAL (07/2015 -) ).

Result:  NEXT

NEXT 

See step  13

1. Store a seat position in memory and check that the buzzer sounds to indicate that a position has been stored (Refer to OPERATION CHECK (07/2015 -) ).
   NOTE:

   • The seat position will not be recorded 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.

   OK

   Seat position memory function operates normally.

Result:  OK

OK 

END (OUTER MIRROR CONTROL ECU ASSEMBLY (FOR FRONT PASSENGER) WAS DEFECTIVE) 

Result:  NG

NG 

See step  14

1. Replace the front power seat switch RH (Refer to REMOVAL (07/2015 -) ).

Result:  NEXT

NEXT 

See step  15

1. Store a seat position in memory and check that the buzzer sounds to indicate that a position has been stored (Refer to OPERATION CHECK (07/2015 -) ).
   NOTE:

   • The seat position will not be recorded 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.

   OK

   Seat position memory function operates normally.

Result:  OK

OK 

END (FRONT POWER SEAT SWITCH RH WAS DEFECTIVE) 

Result:  NG

NG 

REPLACE MAIN BODY ECU (MULTIPLEX NETWORK BODY ECU) 

(Refer to REMOVAL (07/2015 -) )

1. Remove the seat memory switch (for front passenger) (Refer to REMOVAL (07/2015 -) ).

   Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

2. Measure the resistance according to the value(s) in the table below.

   Standard Resistance

   Tester Connection	Condition	Specified Condition
   1 - 5	M1 switch is pressed	Below 1 Ω
   	M1 switch is not pressed	10 kΩ or higher
   2 - 5	M2 switch is pressed	Below 1 Ω
   	M2 switch is not pressed	10 kΩ or higher
   3 - 5	M3 switch is pressed	Below 1 Ω
   	M3 switch is not pressed	10 kΩ or higher
   4 - 5	SET switch is pressed	Below 1 Ω
   	SET switch is not pressed	10 kΩ or higher

   TEXT IN ILLUSTRATION
   
   

   *1	M1 Switch
   *2	M2 Switch
   *3	M3 Switch
   *4	SET Switch
   *a	Component without harness connected (Seat Memory Switch (for Front Passenger)

Result:  NG

NG 

REPLACE SEAT MEMORY SWITCH (FOR FRONT PASSENGER) 

(Refer to REMOVAL (07/2015 -) )

Result:  OK

OK 

See step  17

1. Disconnect the L10 outer mirror control ECU assembly (for front passenger) connector.
2. Measure the resistance according to the value(s) in the table below.

   Standard Resistance

   Tester Connection	Condition	Specified Condition
   L10-2 (M1) - L11-1 (M1)	Always	Below 1 Ω
   L10-3 (M2) - L11-2 (M2)	Always	Below 1 Ω
   L10-4 (M3) - L11-3 (M3)	Always	Below 1 Ω
   L10-1 (MM) - L11-4 (MRY)	Always	Below 1 Ω
   L10-7 (GND) - Body ground	Always	Below 1 Ω
   L11-5 (E) - Body ground	Always	Below 1 Ω
   L10-2 (M1) - Body ground	Always	10 kΩ or higher
   L10-3 (M2) - Body ground	Always	10 kΩ or higher
   L10-4 (M3) - Body ground	Always	10 kΩ or higher
   L10-1 (MM) - Body ground	Always	10 kΩ or higher

Result:  OK

OK 

REPLACE OUTER MIRROR CONTROL ECU ASSEMBLY (FOR FRONT PASSENGER) 

(Refer to REMOVAL (07/2015 -) )

Result:  NG

NG 

REPAIR OR REPLACE HARNESS OR CONNECTOR