Power Seat does not Return to Memorized Position [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. Check the seat position memory function.

   Refer to OPERATION CHECK [12/2019 - ]

   OK

   Seat position memory function is normal.

   Result

   Proceed to
   OK
   NG

Result: 

NG 

GO TO OTHER DIAGNOSIS PROCEDURE (Power Seat Position is not Memorized) 

Refer to Power Seat Position is not Memorized [11/2023 - ] 

Result: 

OK 

See step  3

1. Under each of the following conditions, check that the seat position restoring function operates by pressing the M1 or M2 switch.

   Refer to OPERATION CHECK [12/2019 - ]

   • The ignition switch is ON, and the shift lever is in P.*1
   • Within 180 seconds after the driver door is opened with the ignition switch off.*2
   • Within 60 seconds after the driver door is opened and then closed with the ignition switch off.*3

   Result

   Result	Proceed to
   Seat position restoring function does not operate at all.	A
   Seat position restoring function does not operate when the condition is *1.	B
   Seat position restoring function does not operate when the condition is *2. Seat position restoring function does not operate when the condition is *3.	C

Result: 

B 

See step  7

Result: 

C 

See step  10

Result: 

A 

See step  4

1. Store a seat position in memory for the M1 and M2 switches.

   Refer to OPERATION CHECK [12/2019 - ]

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

   Body Electrical > Driver Seat > Data List 

   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	-

   Body Electrical > Driver Seat > Data List 

   Tester Display
   Seat Memory No1
   Seat Memory No2

   OK

   Mem is displayed on the GTS screen.

   Result

   Proceed to
   OK
   NG

Result: 

NG 

GO TO OTHER DIAGNOSIS PROCEDURE (Power Seat Position is not Memorized) 

Refer to Power Seat Position is not Memorized [11/2023 - ] 

Result: 

OK 

See step  5

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  6

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  8

1. Read the Data List according to the display on the GTS. (for HV Model)

   Powertrain > Hybrid Control > Data List 

   Tester Display	Measurement Item	Range	Normal Condition	Diagnostic Note
   Shift Position	Current shift state	P / R / N / D / B	Matches currently selected shift state: P, R, N, D	-

   Powertrain > Hybrid Control > Data List 

   Tester Display
   Shift Position

2. Read the Data List according to the display on the GTS. (for Gasoline Model)

   Powertrain > Engine > Data List 

   Tester Display	Measurement Item	Range	Normal Condition	Diagnostic Note
   Shift SW Status (N, P Range)	Shift state status	ON or OFF	ON: Shift lever in N or P OFF: Shift lever not in N or P	-

   Powertrain > Engine > Data List 

   Tester Display
   Shift SW Status (N, P Range)

   OK

   On the GTS screen, the current shift state is displayed accordingly.

   Result

   	Proceed to
   OK	A
   NG (for HV Model)	B
   NG (for Gasoline Model)	C

Result: 

B 

GO TO HYBRID CONTROL SYSTEM 

Refer to HOW TO PROCEED WITH TROUBLESHOOTING [11/2023 - ]

Result: 

C 

GO TO AUTOMATIC TRANSAXLE SYSTEM 

Refer to HOW TO PROCEED WITH TROUBLESHOOTING [10/2022 - ]

Result: 

A 

See step  8

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

   Refer to REMOVAL [11/2023 - ]

   Result

   Proceed to
   NEXT

Result: 

NEXT 

See step  9

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 [11/2023 - ]

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

   Body Electrical > Main Body > Data List 

   Tester Display	Measurement Item	Range	Normal Condition	Diagnostic Note
   FL Door Courtesy Switch Status	Front door courtesy light switch assembly (LH) signal	Close or Open	Close: Front door LH closed Open: Front door LH open	-

   Body Electrical > Main Body > Data List 

   Tester Display
   FL Door Courtesy Switch Status

   OK

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

   Result

   Proceed to
   OK
   NG

Result: 

OK 

REPLACE POSITION CONTROL ECU ASSEMBLY 

Refer to REMOVAL [11/2023 - ]

Result: 

NG 

GO TO LIGHTING SYSTEM (Front Door Courtesy Switch Circuit) 

Refer to Front Door Courtesy Switch Circuit [11/2023 - ]