Power Seat Position is not Memorized [11/2024 - ]: Procedure

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

   Refer to OPERATION CHECK [12/2021 - ]

   OK

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

   Result

   Proceed to
   OK
   NG

Result: 

NG 

GO TO PROBLEM SYMPTOMS TABLE 

Refer to PROBLEM SYMPTOMS TABLE [12/2021 - ]

Result: 

OK 

See step  2

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

   Body Electrical > Main Body > Data List 

   Tester Display	Measurement Item	Range	Normal Condition	Diagnostic Note
   Driver Seat Memory Switch (MM)	SET switch signal	ON or OFF	ON: SET switch on OFF: SET switch off	-
   Driver Seat Memory Switch (M1)	M1 switch signal	ON or OFF	ON: M1 switch on OFF: M1 switch off	-
   Driver Seat Memory Switch (M2)	M2 switch signal	ON or OFF	ON: M2 switch on OFF: M2 switch off	-

   Body Electrical > Main Body > Data List 

   Tester Display
   Driver Seat Memory Switch (MM)
   Driver Seat Memory Switch (M1)
   Driver Seat Memory Switch (M2)

   OK

   On the Techstream screen, ON or OFF is displayed accordingly.

   Result

   Proceed to
   OK
   NG

Result: 

NG 

See step  4

Result: 

OK 

See step  3

1. Connect the Techstream to the DLC3.
2. Turn the power switch on (IG).
3. Turn the Techstream on.
4. Enter the following menus: Body Electrical / Driver Seat / Active Test.
5. Perform the Active Test according to the display on the Techstream.

   Body Electrical > Driver Seat > Active Test 

   Tester Display	Measurement Item	Control Range	Diagnostic Note
   Buzzer	Buzzer operation	OFF/ON	-

   Body Electrical > Driver Seat > Active Test 

   Tester Display
   Buzzer

   OK

   Buzzer sounds normally.

   Result

   Proceed to
   OK
   NG

Result: 

OK 

REPLACE MAIN BODY ECU (MULTIPLEX NETWORK BODY ECU) 

Refer to REMOVAL [10/2023 - ]

Result: 

NG 

REPLACE POSITION CONTROL ECU ASSEMBLY 

Refer to REMOVAL [10/2023 - ]

1. Remove the seat memory switch.

   Refer to REMOVAL [11/2018 - ]

2. Inspect the seat memory switch.

   Refer to INSPECTION [11/2018 - ]

   Result

   Proceed to
   OK
   NG

Result: 

NG 

REPLACE SEAT MEMORY SWITCH 

Refer to REMOVAL [11/2018 - ]

Result: 

OK 

See step  5

1. Disconnect the G43 main body ECU (multiplex network body ECU) connector.
2. Disconnect the J4 seat memory switch connector.
3. Measure the resistance according to the value(s) in the table below.

   Standard Resistance

   Tester Connection	Condition	Specified Condition
   G43-7 (MM) - J4-2 (MMRY)	Always	Below 1 Ω
   G43-7 (MM) or J4-2 (MMRY) - Other terminals and body ground	Always	10 kΩ or higher
   G43-10 (M1) - J4-3 (1)	Always	Below 1 Ω
   G43-10 (M1) or J4-3 (1) - Other terminals and body ground	Always	10 kΩ or higher
   G43-9 (M2) - J4-4 (2)	Always	Below 1 Ω
   G43-9 (M2) or J4-4 (2) - Other terminals and body ground	Always	10 kΩ or higher
   J4-1 (E) - Body ground	Always	Below 1 Ω

   Result

   Proceed to
   OK
   NG

Result: 

OK 

REPLACE MAIN BODY ECU (MULTIPLEX NETWORK BODY ECU) 

Refer to REMOVAL [10/2023 - ]

Result: 

NG 

REPAIR OR REPLACE HARNESS OR CONNECTOR