Toyota Venza: Slide Sensor Malfunction (B2650)

Toyota Venza Service Manual / Seat / Front Power Seat Control System(w/ Memory) / Slide Sensor Malfunction (B2650)

DESCRIPTION

When the position control ECU and switch assembly does not receive a sensor signal despite forward or backward movement of seat by power seat motor operation, this DTC is output.

DTC Code	DTC Detection Condition	Trouble Area
B2650	The forward and backward lock detection position of the sensor is the same.	Position control ECU and switch assembly Slide motor (front seat frame with adjuster assembly LH) Wire harness or connector

WIRING DIAGRAM

PROCEDURE

1.	CHECK FOR DTC

(a) Connect the Techstream to the DLC3.

(b) Turn the ignition switch to ON.

(d) Enter the following menus: Body Electrical / Driver Seat / Trouble Codes.

(e) Clear the DTC (See page ).

(f) Recheck for DTC B2650.

Result	Proceed to
DTC B2650 is output	A
DTC B2650 is not output	B

USE SIMULATION METHOD TO CHECK

2.	PERFORM ACTIVE TEST USING TECHSTREAM

(a) Enter the following menus: Body Electrical / Driver Seat / Active Test.

(b) Perform the Active Test according to the display on the Techstream.

Driver Seat

Tester Display	Test Part	Control Range	Diagnostic Note
Seat Slide Operation	Seat sliding operation	OFF/Front/Rear	-

OK:

Motor operates normally.

GO TO STEP 5

3.	CHECK HARNESS AND CONNECTOR (POSITION CONTROL ECU AND SWITCH ASSEMBLY - SLIDE MOTOR)

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

(b) Disconnect the T12 the slide motor (front seat frame with adjuster assembly LH) connector.

Standard Resistance:

Tester Connection	Condition	Specified Condition
T11-3 (PVCC) - T12-5 (VCC)	Always	Below 1 Ω
T11-2 (SSRS) - T12-2 (O/P)	Always	Below 1 Ω
T11-1 (SGND) - T12-6 (GND)	Always	Below 1 Ω
T11-3 (PVCC) - Body ground	Always	10 kΩ or higher
T11-2 (SSRS) - Body ground	Always	10 kΩ or higher
T11-1 (SGND) - Body ground	Always	10 kΩ or higher

REPAIR OR REPLACE HARNESS OR CONNECTOR

4.	CHECK POSITION CONTROL ECU AND SWITCH ASSEMBLY (SLIDE MOTOR CIRCUIT)

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

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

Standard Voltage:

Tester Connection	Condition	Specified Condition
T12-5 (VCC) - T12-6 (GND)	Slide switch on	5.5 to 6.5 V

REPLACE FRONT SEAT FRAME WITH ADJUSTER ASSEMBLY LH

REPLACE POSITION CONTROL ECU AND SWITCH ASSEMBLY

5.	INSPECT FRONT SEAT FRAME WITH ADJUSTER ASSEMBLY LH

(a) Disconnect the T12 the slide motor (front seat frame with adjuster assembly LH) connector.

(b) Check if the seat frame moves smoothly when the battery is connected to the slide motor connector terminals.

OK:

Condition

Operational Direction

Battery positive (+) → Terminal 3

Battery negative (-) → Terminal 4

Forward

Battery positive (+) → Terminal 4

Battery negative (-) → Terminal 3

Backward

Text in Illustration

*a	Component without harness connected (Slide Motor (Front Seat Frame with Adjuster Assembly LH))

REPLACE FRONT SEAT FRAME WITH ADJUSTER ASSEMBLY LH

6.	CHECK HARNESS AND CONNECTOR (POSITION CONTROL ECU AND SWITCH ASSEMBLY - SLIDE MOTOR)

(a) Disconnect the T10 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
T10-2 (SLD+) - T12-3 (FWD)	Always	Below 1 Ω
T10-4 (SLD-) - T12-4 (BACK)	Always	Below 1 Ω
T10-2 (SLD+) - Body ground	Always	10 kΩ or higher
T10-4 (SLD-) - Body ground	Always	10 kΩ or higher

REPLACE POSITION CONTROL ECU AND SWITCH ASSEMBLY

REPAIR OR REPLACE HARNESS OR CONNECTOR

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