Power Seat Power Easy Access System Function does not Operate

DESCRIPTION

The driver seat belt is unfastened with the engine switch off and the shift lever in P.
The engine switch is turned from on (IG) or on (ACC) to off with the shift lever in P or N and the driver seat belt unfastened.

The driver seat belt is fastened with the engine switch on (IG) or on (ACC) and the shift lever in P or N.
The engine switch is turned from off to on (IG) or on (ACC) with the shift lever in P or N and the driver seat belt unfastened.

WIRING DIAGRAM

CAUTION / NOTICE / HINT

Note

The front power seat control system uses the CAN communication system. First, confirm that there is no malfunction in the CAN communication system. Refer to the How to Proceed with Troubleshooting procedure.

Click here
Before replacing the main body ECU (multiplex network body ECU), refer to Service Bulletin.
Inspect the fuses for circuits related to this system before performing the following procedure.

Tech Tips

When troubleshooting a function, first make sure that the function is set to the default setting.

PROCEDURE

CHECK FRONT POWER SEAT OPERATION

Check that each function of the power seat operates normally by using the position control ECU and switch assembly (driver seat).

Result

Result	Proceed to
Power seat functions operate normally	A
All power seat functions do not operate	B
One or more power seat motors do not operate	C

B

GO TO OTHER FLOW CHART (Front Power Seat does not Operate with Front Power Seat Switch) Click here

C

GO TO OTHER FLOW CHART (One or more Power Seat Motors do not Operate) Click here

A

CHECK SEAT BELT TENSION REDUCER SYSTEM

Check the seat belt tension reducer system.

OK
Seat belt tension reducer system is normal.

Result

Proceed to
OK
NG

NG

REPLACE FRONT SEAT OUTER BELT ASSEMBLY LH Click here

OK

REPLACE POSITION CONTROL ECU AND SWITCH ASSEMBLY (DRIVER SEAT)

Temporarily replace the position control ECU and switch assembly (driver seat) with a new or known good one.

Result

Proceed to
NEXT

CHECK POWER SEAT POWER EASY ACCESS SYSTEM

Check the power seat easy access system.

OK
Power seat power easy access system is normal.

Result

Proceed to
OK
NG

OK

END (POSITION CONTROL ECU AND SWITCH ASSEMBLY (DRIVER SEAT) WAS DEFECTIVE)

NG

REPLACE MAIN BODY ECU (MULTIPLEX NETWORK BODY ECU) Click here

FRONT POWER SEAT CONTROL SYSTEM Power Seat Power Easy Access System Function does not Operate