Lexus NX: Slide Sensor Malfunction (B2650)

DESCRIPTION

When the front power seat switch LH does not receive a sensor signal despite forward or backward movement of the seat by power seat motor operation, this DTC is stored.

DTC No.	Detection Item	DTC Detection Condition	Trouble Area
B2650	Slide Sensor Malfunction	The forward and backward lock detection position of the sensor is the same.	Front power seat switch LH Front seat adjuster assembly LH Harness or connector

WIRING DIAGRAM

PROCEDURE

1.

CLEAR DTC

(a) Clear the DTCs.

Click here

Body Electrical > Driver Seat > Clear DTCs

NEXT

2.	CHECK FOR DTC

(a) Check for DTCs.

Click here

Body Electrical > Driver Seat > Trouble Codes

OK:

DTC B2650 is not output.

OK

USE SIMULATION METHOD TO CHECK

NG

3.	PERFORM ACTIVE TEST USING TECHSTREAM (SEAT SLIDE OPERATION)

(a) Connect the Techstream to the DLC3.

(b) Turn the power switch on (IG).

(c) Turn the Techstream on.

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

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

Body Electrical > Driver Seat > Active Test

Tester Display	Measurement Item	Control Range	Diagnostic Note
Seat Slide Operation	Seat slide operation	OFF/Rear/Front	-

Body Electrical > Driver Seat > Active Test

Tester Display
Seat Slide Operation

OK:

Motor operates normally.

NG

GO TO STEP 11

OK

4.	CHECK FRONT POWER SEAT SWITCH LH (SLIDE MOTOR CIRCUIT)

(a) Measure the voltage according to the value(s) in the table below. Standard Voltage: Tester Connection Condition Specified Condition g12-1 (SGND) - g12-5 (SSRS) Slide function operating 4.8 to 5.1 V

*a Component with harness connected (Front Power Seat Switch LH)

NG

GO TO STEP 7

OK

5.

CLEAR DTC

(a) Clear the DTCs.

Click here

Body Electrical > Driver Seat > Clear DTCs

NEXT

6.	CHECK FOR DTC

(a) Check for DTCs.

Click here

Body Electrical > Driver Seat > Trouble Codes

OK:

DTC B2650 is not output.

OK

USE SIMULATION METHOD TO CHECK

NG

REPLACE FRONT POWER SEAT SWITCH LH

7.	CHECK HARNESS AND CONNECTOR (FRONT POWER SEAT SWITCH LH - FRONT SEAT ADJUSTER ASSEMBLY LH [SLIDE MOTOR])

(a) Disconnect the g12 front power seat switch LH connector.

(b) Disconnect the g10 front seat adjuster assembly LH connector.

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

Standard Resistance:

Tester Connection	Condition	Specified Condition
g12-5 (SSRS) - g10-2 (O/P)	Always	Below 1 Ω
g12-5 (SSRS) or g10-2 (O/P) - Body ground	Always	10 kΩ or higher
g12-1 (SGND) - g10-3 (GND)	Always	Below 1 Ω
g12-1 (SGND) or g10-3 (GND) - Body ground	Always	10 kΩ or higher

NG

REPAIR OR REPLACE HARNESS OR CONNECTOR

OK

8.	REPLACE FRONT POWER SEAT SWITCH LH

(a) Replace the front seat switch LH with new or known good one.

Click here

NEXT

9.

CLEAR DTC

(a) Clear the DTCs.

Click here

Body Electrical > Driver Seat > Clear DTCs

NEXT

10.	CHECK FOR DTC

(a) Check for DTCs.

Click here

Body Electrical > Driver Seat > Trouble Codes

OK:

DTC B2650 is not output.

OK

END (FRONT POWER SEAT SWITCH LH WAS DEFECTIVE)

NG

REPLACE FRONT SEAT ADJUSTER ASSEMBLY LH

11.	INSPECT FRONT SEAT ADJUSTER ASSEMBLY LH (SLIDE MOTOR)

(a) Remove the front seat adjuster assembly LH.

Click here

(b) Inspect the front seat adjuster assembly LH.

Click here

NG

REPLACE FRONT SEAT ADJUSTER ASSEMBLY LH

OK

12.	CHECK HARNESS AND CONNECTOR (FRONT POWER SEAT SWITCH LH - FRONT SEAT ADJUSTER ASSEMBLY LH [SLIDE MOTOR])

(a) Disconnect the g11 front power seat switch LH connector.

(b) Disconnect the g10 front seat adjuster assembly LH connector.

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

Standard Resistance:

Tester Connection	Condition	Specified Condition
g11-3 (SLD+) - g10-4 (FWD)	Always	Below 1 Ω
g11-3 (SLD+) or g10-4 (FWD) - Body ground	Always	10 kΩ or higher
g11-4 (SLD-) - g10-1 (BACK)	Always	Below 1 Ω
g11-4 (SLD-) or g10-1 (BACK) - Body ground	Always	10 kΩ or higher

OK

REPLACE FRONT POWER SEAT SWITCH LH

NG

REPAIR OR REPLACE HARNESS OR CONNECTOR

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