Power Seat Position is not Memorized [12/2019 - 11/2023]: Procedure

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

   Refer to OPERATION CHECK [12/2019 - ]

   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 [12/2019 - ] 

Result: 

OK 

See step  2

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

   Body Electrical > Mirror L > Data List 

   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 Set SW	SET switch	ON or OFF	ON: SET switch on OFF: SET switch off	-

   Body Electrical > Mirror L > Data List 

   Tester Display
   Seat Memory Switch1
   Seat Memory Switch2
   Seat Memory Set SW

   OK

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

   Result

   Proceed to
   OK
   NG

Result: 

NG 

See step  8

Result: 

OK 

See step  3

1. Perform the Active Test according to the display on the GTS.

   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: 

NG 

REPLACE POSITION CONTROL ECU ASSEMBLY. Refer to  REMOVAL [12/2019 - 10/2022]  , or refer to  REMOVAL [10/2022 - 11/2023] 

Result: 

OK 

See step  4

1. Replace the outer mirror control ECU assembly (driver door) with a new or known good one.

   Refer to REMOVAL [12/2019 - ]

   Result

   Proceed to
   NEXT

Result: 

NEXT 

See step  5

1. Check the seat position memory and restoring functions.

   Refer to OPERATION CHECK [12/2019 - ]

   OK

   Seat position memory and restoring functions operate normally.

   Result

   Proceed to
   OK
   NG

Result: 

OK 

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

Result: 

NG 

See step  6

1. Replace the position control ECU assembly with a new or known good one.

   Refer to REMOVAL [12/2019 - 10/2022] , or refer to REMOVAL [10/2022 - 11/2023]

   Result

   Proceed to
   NEXT

Result: 

NEXT 

See step  7

1. Check the seat position memory and restoring functions.

   Refer to OPERATION CHECK [12/2019 - ]

   OK

   Seat position memory and restoring functions operate normally.

   Result

   Proceed to
   OK
   NG

Result: 

OK 

END (POSITION CONTROL ECU ASSEMBLY WAS DEFECTIVE) 

Result: 

NG 

REPLACE MAIN BODY ECU (MULTIPLEX NETWORK BODY ECU). Refer to  REMOVAL [12/2019 - 10/2022]  , or refer to  REMOVAL [10/2022 - 11/2023] 

Refer to INSPECTION [12/2019 - ]

Result

Result: 

NG 

REPLACE SEAT MEMORY SWITCH. Refer to  REMOVAL [12/2019 - ] 

Result: 

OK 

See step  9

1. Disconnect the J23 outer mirror control ECU assembly (driver door) connector.
2. Measure the resistance according to the value(s) in the table below.

   Standard Resistance

   Tester Connection	Condition	Specified Condition
   J23-1 (MM) - J21-2 (MMRY)	Always	Below 1 Ω
   J23-1 (MM) or J21-2 (MMRY) - Body ground	Always	10 kΩ or higher
   J23-2 (M1) - J21-3 (1)	Always	Below 1 Ω
   J23-2 (M1) or J21-3 (1) - Body ground	Always	10 kΩ or higher
   J23-3 (M2) - J21-4 (2)	Always	Below 1 Ω
   J23-3 (M2) or J21-4 (2) - Body ground	Always	10 kΩ or higher
   J23-7 (GND) - Body ground	Always	Below 1 Ω
   J21-1 (E) - Body ground	Always	Below 1 Ω

   Result

   Proceed to
   OK
   NG

Result: 

OK 

REPLACE OUTER MIRROR CONTROL ECU ASSEMBLY (DRIVER DOOR). Refer to  REMOVAL [12/2019 - ] 

Result: 

NG 

REPAIR OR REPLACE HARNESS OR CONNECTOR