Toyota 4Runner manuals

Toyota 4Runner: 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 Code

DTC Detection Condition

Trouble Area

B2650

The forward and backward lock detection position of the sensor is the same.

  • Front power seat switch LH
  • Separate type front seat cushion spring assembly LH (Slide motor)
  • Harness or connector

WIRING DIAGRAM


PROCEDURE

1.

PERFORM ACTIVE TEST USING TECHSTREAM (POWER SEAT MOTOR FUNCTION)

(a) Select the Active Test, use the Techstream to generate a control command, and then check the power seat motor function (See page ).


Driver Seat

Tester Display

Test Part

Control Range

Diagnostic Note

Seat Slide Operation

Seat sliding operation

Front / OFF / Rear

-

OK:

Motor operates normally.


NG

GO TO STEP 5


OK

2.

CHECK FRONT POWER SEAT SWITCH LH (SLIDE MOTOR CIRCUIT)

(a) Disconnect the b15 slide motor connector.


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

Standard Voltage:

Tester Connection

Switch Condition

Specified Condition

b15-2 (O/P) - b15-3 (GND)

Sliding switch on

4.8 to 5.1 V

Text in Illustration

*a

Front view of wire harness connector

(to Separate Type Front Seat Cushion Spring Assembly LH [Slide Motor])


NG

GO TO STEP 4


OK

3.

CHECK SEPARATE TYPE FRONT SEAT CUSHION SPRING ASSEMBLY LH (SLIDE MOTOR)

(a) Connect the b15 slide motor connector.


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

Standard Voltage:

Tester Connection

Switch Condition

Specified Condition

b15-2 (O/P) - Body ground

Sliding switch on

4.5 to 4.8 V

Text in Illustration

*a

Component with harness connected

(Separate Type Front Seat Cushion Spring Assembly LH [Slide Motor])


OK

REPLACE FRONT POWER SEAT SWITCH LH


NG

REPLACE SEPARATE TYPE FRONT SEAT CUSHION SPRING ASSEMBLY LH (SLIDE MOTOR)

4.

CHECK HARNESS AND CONNECTOR (FRONT POWER SEAT SWITCH - SLIDE MOTOR)

(a) Disconnect the b19 front power seat switch LH connector.

(b) Disconnect the b15 slide motor connector.

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

Standard Resistance:

Tester Connection

Condition

Specified Condition

b19-5 (SSRS) - b15-2 (O/P)

Always

Below 1 Ω

b19-1 (SGND) - b15-3 (GND)

Always

Below 1 Ω

b19-5 (SSRS) - Body ground

Always

10 kΩ or higher

b19-1 (SGND) - Body ground

Always

10 kΩ or higher


OK

REPLACE FRONT POWER SEAT SWITCH LH


NG

REPAIR OR REPLACE HARNESS OR CONNECTOR

5.

INSPECT SEPARATE TYPE FRONT SEAT CUSHION SPRING ASSEMBLY LH (SLIDE MOTOR)

(a) Remove the separate type front seat cushion spring assembly LH (slide motor) (See page ).



(b) Disconnect the b15 slide motor connector.

(c) Check if the seat cushion spring moves smoothly when the battery is connected to the slide motor connector terminals.

OK:

Measurement Condition

Specified Condition

Battery positive (+) → 4 (FWD)

Battery negative (-) → 1 (BACK)

Front seat cushion spring assembly LH moves forward

Battery positive (+) → 1 (BACK)

Battery negative (-) → 4 (FWD)

Front seat cushion spring assembly LH moves backward

Text in Illustration

*a

Component without harness connected

(Separate Type Front Seat Cushion Spring Assembly LH [Slide Motor])


NG

REPLACE SEPARATE TYPE FRONT SEAT CUSHION SPRING ASSEMBLY LH (SLIDE MOTOR)


OK

6.

CHECK HARNESS AND CONNECTOR (FRONT POWER SEAT SWITCH LH - SLIDE MOTOR)

(a) Disconnect the b18 front power seat switch LH connector.

(b) Disconnect the b15 slide motor connector.

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

Standard Resistance:

Tester Connection

Condition

Specified Condition

b18-3 (SLD+) - b15-4 (FWD)

Always

Below 1 Ω

b18-4 (SLD-) - b15-1 (BACK)

Always

Below 1 Ω

b18-3 (SLD+) - Body ground

Always

10 kΩ or higher

b18-4 (SLD-) - 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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