Toyota Venza: Power Seat Power Easy Access System Function does not Operate

Toyota Venza Service Manual / Seat / Front Power Seat Control System(w/ Memory) / Power Seat Power Easy Access System Function does not Operate

DESCRIPTION

When the ignition switch is off and shift lever is in P, the power seat slides rearward when the seat belt tongue plate is disengaged from the front seat inner belt assembly LH (auto away function). Also the power seat slides forward when the seat belt tongue plate is engaged to the front seat inner belt assembly LH with the ignition switch ACC or ON, and shift lever is in P.

WIRING DIAGRAM

CAUTION / NOTICE / HINT

NOTICE:

The front power seat control system (w/ Memory) uses the CAN communication system. First, confirm that there is no malfunction in the communication system by checking communication function of the CAN communication system. Refer to the How to Proceed with Troubleshooting procedure (See page ).

PROCEDURE

1.	CHECK FRONT POWER SEAT OPERATION

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

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

GO TO OTHER DIAGNOSIS PROCEDURE (Front Power Seat does not Operate with Front Power Seat Switch)

GO TO OTHER DIAGNOSIS PROCEDURE (One or more Power Seat Motors do not Operate)

2.	READ VALUE USING TECHSTREAM

(a) Connect the Techstream to the DLC3.

(b) Turn the ignition switch to ON.

(d) Enter the following menus: Body Electrical / Driver Seat / Data List.

(e) Read the Data List according to the display on the Techstream.

Driver Seat

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

OK:

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

GO TO STEP 5

3.	REPLACE POSITION CONTROL ECU AND SWITCH ASSEMBLY

(a) Replace the position control ECU and switch assembly (See page ).

4.	CHECK POWER SEAT POWER EASY ACCESS SYSTEM

(a) Check that the power seat easy access system operates normally when engaging and disengaging the tongue plate of the seat belt with the shift lever in P (See page ).

OK:

Power seat power easy access system is normal.

END (POSITION CONTROL ECU AND SWITCH ASSEMBLY WAS DEFECTIVE)

REPLACE MAIN BODY ECU (DRIVER SIDE JUNCTION BLOCK ASSEMBLY)

5.	INSPECT FRONT SEAT INNER BELT ASSEMBLY LH

(a) Remove the front seat inner belt assembly LH (See page ).

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

Standard Resistance:

Tester Connection	Condition	Specified Condition
4 - 5	Driver seat belt unfastened	10 kΩ or higher
4 - 5	Driver seat belt fastened	Below 1 Ω

Text in Illustration

*a	Component without harness connected (Front Seat Inner Belt Assembly LH)

REPLACE FRONT SEAT INNER BELT ASSEMBLY LH

6.	CHECK HARNESS AND CONNECTOR (POSITION CONTROL ECU AND SWITCH ASSEMBLY - FRONT SEAT INNER BELT ASSEMBLY LH)

(a) Disconnect the T11 the position control ECU and switch assembly connector.

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

Standard Resistance:

Tester Connection	Condition	Specified Condition
T11-4 (DBCL) - T13-5 (RDC)	Always	Below 1 Ω
T13-4 (E) - Body ground	Always	Below 1 Ω
T11-4 (DBCL) - Body ground	Always	10 kΩ or higher

REPLACE POSITION CONTROL ECU AND SWITCH ASSEMBLY

REPAIR OR REPLACE HARNESS OR CONNECTOR

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