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

DESCRIPTION

The seat slides backward when either of the following conditions is met:

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 seat slides forward when either of the following conditions is met:

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

Figure 1. for LHD

Figure 2. for RHD

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
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.

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PROCEDURE

CHECK FRONT POWER SEAT OPERATION

*1: for LHD
*2: for RHD

Check that each function of the power seat operates normally by using the front power seat switch LH*1 or RH*2.

Click here

Result

Proceed to
OK
NG

GO TO OTHER DIAGNOSTIC PROCEDURE (Front Power Seat does not Operate with Front Power Seat Switch) Click here

CHECK SEAT POSITION MEMORY FUNCTION

Check the seat position memory function.

Click here

OK
Seat position memory function is normal.

Result

Proceed to
OK
NG

GO TO OTHER DIAGNOSTIC PROCEDURE (Power Seat does not Return to Memorized Position) Click here

READ VALUE USING GTS (DRIVER SEAT BUCKLE SW)

Connect the GTS to the DLC3.
Turn the engine switch on (IG).
Turn the GTS on.
Enter the following menus: Body Electrical / Driver Seat / Data List.

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
Driver Seat Buckle SW	Driver seat belt buckle switch	ON or OFF	ON: Driver seat belt fastened OFF: Driver seat belt unfastened	-

Tester Display

Measurement Item

Range

Normal Condition

Diagnostic Note

Driver Seat Buckle SW

Driver seat belt buckle switch

ON or OFF

ON: Driver seat belt fastened

OFF: Driver seat belt unfastened

Body Electrical > Driver Seat > Data List

Tester Display
Driver Seat Buckle SW

OK
On the GTS screen, the item changes between ON and OFF according to the above.

Result

Proceed to
OK
NG

REPLACE FRONT POWER SEAT SWITCH Click here

INSPECT FRONT SEAT INNER BELT ASSEMBLY

*1: for LHD
*2: for RHD

Remove the front seat inner belt assembly LH*1 or RH*2.

Click here

Inspect the front seat inner belt assembly LH*1 or RH*2.

Click here

Result

Proceed to
OK
NG

REPLACE FRONT SEAT INNER BELT ASSEMBLY Click here

CHECK HARNESS AND CONNECTOR (FRONT POWER SEAT SWITCH - FRONT SEAT INNER BELT ASSEMBLY AND BODY GROUND)

*1: for LHD
*2: for RHD

Disconnect the W20*1 or W7*2 front power seat switch LH*1 or RH*2 connector.
Disconnect the W22*1 or W9*2 front seat inner belt assembly LH*1 or RH*2 connector.

Measure the resistance according to the value(s) in the table below.

Standard Resistance

for LHD

Tester Connection	Condition	Specified Condition
W20-10 (DBCL) - W22-3 (+)	Always	Below 1 Ω
W20-10 (DBCL) or W22-3 (+) - Body ground	Always	10 kΩ or higher
W22-2 (E) - Body ground	Always	Below 1 Ω

for RHD

Tester Connection	Condition	Specified Condition
W7-10 (DBCL) - W9-3 (+)	Always	Below 1 Ω
W7-10 (DBCL) or W9-3 (+) - Body ground	Always	10 kΩ or higher
W9-2 (E) - Body ground	Always	Below 1 Ω

Result

Proceed to
OK
NG

REPLACE FRONT POWER SEAT SWITCH Click here

REPAIR OR REPLACE HARNESS OR CONNECTOR