Power Seat Position is not Memorized: Procedure

1. Check that each function of the power seat operates normally by using the front power seat switches.

   OK

   Each function of power seat operates normally by using seat switches

NG → See step   12 

OK: Go to next step 

1. Perform a memory operation properly. Check that the buzzer sounds to indicate the completion of the memory operation.
   NOTE:

   • The seat position will not be recorded if the SET switch and 2 or more of the memory switches (for example, M1 and M2) 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 memory switch function operates normally.

   RESULT:
   
   

   Result	Proceed to
   NG (Driver side seat memory function does not operate)	A
   NG (Passenger side seat memory function does not operate)	B
   OK	C

C → See step   13 

B → See step   9 

A: Go to next step 

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 / MSW / Data List.
5. Read the Data List according to the display on the Techstream.
   MSW
   
   

   Tester Display	Measurement Item/Range	Normal Condition	Diagnostic Note
   Seat Memory Set Switch	SET switch signal / ON or OFF	ON: SET switch is ON OFF: SET switch is OFF	-
   Seat Memory Switch M1	M1 switch signal / ON or OFF	ON: M1 switch is ON OFF: M1 switch is OFF	-
   Seat Memory Switch M2	M2 switch signal / ON or OFF	ON: M2 switch is ON OFF: M2 switch is OFF	-
   Seat Memory Switch M3	M3 switch signal / ON or OFF	ON: M3 switch is ON OFF: M3 switch is OFF	-

   OK

   On tester screen, each item changes between ON and OFF according to above chart.

NG → See step   5 

OK: Go to next step 

1. Enter the following menus: Body Electrical / Driver Seat / Data List.
2. Read the Data List according to the display on the Techstream.
   DRIVER SEAT
   
   

   Tester Display	Measurement Item/Range	Normal Condition	Diagnostic Note
   M1 Switch	M1 switch signal / ON or OFF	ON: M1 switch is ON OFF: M1 switch is OFF	-
   M2 Switch	M2 switch signal / ON or OFF	ON: M2 switch is ON OFF: M2 switch is OFF	-
   M3 Switch	M3 switch signal / ON or OFF	ON: M3 switch is ON OFF: M3 switch is OFF	-
   SET Switch	SET switch signal / ON or OFF	ON: SET switch is ON OFF: SET switch is OFF	-
   Slide Position	Seat sliding Position / MIN: -4096, MAX: 4096	Within -4096 to 4096	-
   Reclining Position	Seatback Position / MIN: -4096, MAX: 4096	Within -4096 to 4096	-
   Front Vertical Position	Seat front vertical Position / MIN: -4096, MAX: 4096	Within -4096 to 4096	-
   Lifter Position	Seat lifter Position / MIN: -4096, MAX: 4096	Within -4096 to 4096	-
   Memory No1	Driving position memorized with M1 switch / MEM or NOT MEM	MEM: Memorized NOT MEM: Not memorized	-
   Memory No2	Driving position memorized with M2 switch / MEM or NOT MEM	MEM: Memorized NOT MEM: Not memorized	-
   Memory No3	Driving position memorized with M3 switch / MEM or NOT MEM	MEM: Memorized NOT MEM: Not memorized	-
   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	-
   Ignition switch	Engine Switch status (IG) / ON or OFF	ON: Engine switch on (IG) OFF: Engine switch off	-

   OK

   On tester screen, each item is displayed according to above chart.

NG → See step   14 

OK → See step   15 

1. Remove the seat memory switch. Refer to REMOVAL .
   Fig 1: Identifying Seat Memory Switch Connector Terminals

   Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
2. Measure the resistance according to the value(s) in the table below.
   STANDARD RESISTANCE
   
   

   Tester Condition	Switch Condition	Special Condition
   2 (M1) - 5 (E)	M1 switch pressed	Below 1 Ω
   3 (M2) - 5 (E)	M2 switch pressed	Below 1 Ω
   4 (M3) - 5 (E)	M3 switch pressed	Below 1 Ω
   1 (MRY) - 5 (E)	SET switch pressed	Below 1 Ω

NG → See step   16 

OK: Go to next step 

1. Disconnect the Q13 and Q10 switch connectors.
   Fig 2: Identifying Multiplex Network Master Switch Assembly & Seat Memory Switch (LH) Harness Connector Terminals

   Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
2. Measure the resistance according to the value(s) in the table below.
   STANDARD RESISTANCE
   
   

   Tester Connection	Specified Condition
   Q13-8 (MM) - Q10-1 (MRY)	Below 1 Ω
   Q13-7 (M1) - Q10-2 (M1)	Below 1 Ω
   Q13-5 (M2) - Q10-3 (M2)	Below 1 Ω
   Q13-14 (M3) - Q10-4 (M3)	Below 1 Ω

NG → REPAIR OR REPLACE HARNESS OR CONNECTOR 

OK: Go to next step 

1. Disconnect the Q10 switch connector.
   Fig 3: Identifying Seat Memory Switch LH Harness Connector Terminals

   Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
2. Measure the resistance according to the value(s) in the table below.
   STANDARD RESISTANCE
   
   

   Tester Connection	Specified Condition
   Q10-5 (E) - Body ground	Below 1 Ω

NG → See step   8 

OK → See step   17 

1. Disconnect the M9 ECU connector.
   Fig 4: Identifying Front Multiplex Network Door ECU (LH) & Seat Memory Switch (LH) Harness Connector Terminals

   Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
2. Disconnect the Q10 switch connector.
3. Measure the resistance according to the value(s) in the table below.
   STANDARD RESISTANCE
   
   

   Tester Connection	Specified Condition
   M9-26 (MSWE) - Q10-5 (E)	Below 1 Ω
   M9-1 (GND) - Body ground	Below 1 Ω

NG → REPAIR OR REPLACE HARNESS OR CONNECTOR 

OK → See step   18 

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 / MSW / Data List.
5. Read the Data List according to the display on the Techstream.
   MSW
   
   

   Tester Display	Measurement Item/Range	Normal Condition	Diagnostic Note
   Seat Memory Set Switch	SET switch signal / ON or OFF	ON: SET switch is ON OFF: SET switch is OFF	-
   Seat Memory Switch M1	M1 switch signal / ON or OFF	ON: M1 switch is ON OFF: M1 switch is OFF	-
   Seat Memory Switch M2	M2 switch signal / ON or OFF	ON: M2 switch is ON OFF: M2 switch is OFF	-
   Seat Memory Switch M3	M3 switch signal / ON or OFF	ON: M3 switch is ON OFF: M3 switch is OFF	-

   OK

   On tester screen, each item is displayed according to above chart.

NG → See step   10 

OK → See step   19 

1. Remove the seat memory switch. Refer to REMOVAL .
   Fig 5: Identifying Seat Memory Switch (RH) Connector Terminals

   Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
2. Measure the resistance according to the value(s) in the table below.
   STANDARD RESISTANCE
   
   

   Tester Connection	Switch Condition	Specified Condition
   2 (1) - 5 (E)	M1 switch pressed	Below 1 Ω
   3 (2) - 5 (E)	M2 switch pressed	Below 1 Ω
   4 (3) - 5 (E)	M3 switch pressed	Below 1 Ω
   1 (MMRY) - 5 (E)	SET switch pressed	Below 1 Ω

NG → See step   20 

OK: Go to next step 

1. Disconnect the M4 ECU connector.
   Fig 6: Identifying Front Multiplex Network Door ECU (RH) & Seat Memory Switch (RH) Harness Connector Terminals

   Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
2. Measure the resistance according to the value(s) in the table below.
   STANDARD RESISTANCE
   
   

   Tester Connection	Specified Condition
   M4-25 (MM) - Q2-1 (MMRY)	Below 1 Ω
   M4-22 (M1) - Q2-2 (1)	Below 1 Ω
   M4-23 (M2) - Q2-3 (2)	Below 1 Ω
   M4-24 (M3) - Q2-4 (3)	Below 1 Ω
   M4-1 (GND) - Body ground	Below 1 Ω

NG → REPAIR OR REPLACE HARNESS OR CONNECTOR 

OK → See step   21