B2652

SEAT: FRONT POWER SEAT CONTROL SYSTEM: B2652: Front Vertical Sensor Malfunction
B2652 - Front Vertical Sensor Malfunction

DESCRIPTION

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





WIRING DIAGRAM





INSPECTION PROCEDURE

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 Scan Tool Testing and Procedures.

Driver Seat





OK:

Motor operates normally.

NG -- INSPECT SEPARATE TYPE FRONT SEAT CUSHION SPRING ASSEMBLY LH (FRONT VERTICAL MOTOR)
OK -- Continue to next step.

2. CHECK FRONT POWER SEAT SWITCH LH (FRONT VERTICAL MOTOR CIRCUIT)

(a) Disconnect the b2 motor connector.





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

Standard Voltage:





Text in Illustration





NG -- CHECK HARNESS AND CONNECTOR (FRONT POWER SEAT SWITCH - FRONT VERTICAL MOTOR)
OK -- Continue to next step.

3. CHECK SEPARATE TYPE FRONT SEAT CUSHION SPRING ASSEMBLY LH (FRONT VERTICAL MOTOR)

(a) Connect the b2 motor connector.





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

Standard Voltage:





Text in Illustration





NG -- REPLACE SEPARATE TYPE FRONT SEAT CUSHION SPRING ASSEMBLY LH (FRONT VERTICAL MOTOR) Disassembly

OK -- REPLACE FRONT POWER SEAT SWITCH LH Disassembly

4. CHECK HARNESS AND CONNECTOR (FRONT POWER SEAT SWITCH - FRONT VERTICAL MOTOR)

(a) Disconnect the b5 switch connector.

(b) Disconnect the b2 motor connector.

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

Standard Resistance:





NG -- REPAIR OR REPLACE HARNESS OR CONNECTOR

OK -- REPLACE FRONT POWER SEAT SWITCH LH Disassembly

5. INSPECT SEPARATE TYPE FRONT SEAT CUSHION SPRING ASSEMBLY LH (FRONT VERTICAL MOTOR)

(a) Remove the separate type front seat cushion spring assembly LH (front vertical motor) Disassembly.





(b) Check if the seat cushion spring moves smoothly when the battery is connected to the front vertical motor connector terminals.

OK:





NG -- REPLACE SEPARATE TYPE FRONT SEAT CUSHION SPRING ASSEMBLY LH (FRONT VERTICAL MOTOR) Disassembly
OK -- Continue to next step.

6. CHECK HARNESS AND CONNECTOR (FRONT POWER SEAT SWITCH - FRONT VERTICAL MOTOR)

(a) Disconnect the b4 switch connector.

(b) Disconnect the b2 motor connector.

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

Standard Resistance:





NG -- REPAIR OR REPLACE HARNESS OR CONNECTOR

OK -- REPLACE FRONT POWER SEAT SWITCH LH Disassembly