B2653

SEAT: FRONT POWER SEAT CONTROL SYSTEM: B2653: Lifter Sensor Malfunction
B2653 - Lifter Sensor Malfunction

DESCRIPTION

When the front power seat switch does not receive a sensor signal despite upward or downward movement of the seat 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.





OK:

Motor operates normally.

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

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

(a) Disconnect the b3 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 - LIFTER MOTOR)
OK -- Continue to next step.

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

(a) Connect the b3 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 (LIFTER MOTOR) Disassembly

OK -- REPLACE FRONT POWER SEAT SWITCH LH Disassembly

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

(a) Disconnect the b5 switch connector.

(b) Disconnect the b3 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 (LIFTER MOTOR)

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





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

OK:





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

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

(a) Disconnect the b4 switch connector.

(b) Disconnect the b3 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