Power Supply and Ground Circuit Check [Sunroof Motor Assembly]

Power Supply and Ground Circuit Check [Sunroof Motor Assembly]

Diagnosis Procedure

Regarding Wiring Diagram information, refer to [Sunroof: Wiring Diagram] [1][2]Electrical Diagrams.

SUNROOF MOTOR ASSEMBLY

1. CHECK SUNROOF MOTOR POWER SUPPLY

1 Turn ignition switch OFF.





2 Disconnect sunroof motor assembly connector B83.
3 Turn ignition switch ON.
4 Check voltage between sunroof motor assembly connector B83 terminals 7 and 9 and ground.






Is the voltage as specified?
YES
GO TO 7
NO (With power seats)
GO TO 2
NO (Without power seats)
ERROR! Unknown action!GO TO 5

2. CHECK SUNROOF MOTOR POWER SUPPLY CIRCUITS

1 Turn ignition switch OFF.
2 Disconnect BCM connector M20 and circuit breaker-2 connector M82.
3 Check continuity between BCM connector M20, circuit breaker-2 connector M82 and sunroof motor assembly connector B83.






4 Check continuity between BCM connector M20, circuit breaker-2 and ground.






Are the continuity test results as specified?
YES
GO TO 3
NO
Repair or replace harness.

3. CHECK BCM OUTPUT SIGNAL

1 Connect BCM connector M20.
2 Turn ignition switch ON.
3 Check voltage between BCM connector M20 and ground.






Is the voltage reading as specified?
YES
GO TO 4
NO
Replace BCM. Refer to [BCM: Removal and Installation] Removal and Replacement.

4. CHECK SUNROOF MOTOR POWER SUPPLY CIRCUITS

1 Check voltage between circuit breaker-2 connector M82 and ground.






Is the voltage reading as specified?
YES
Replace circuit breaker-2
NO
Repair or replace harness.

5. CHECK SUNROOF MOTOR POWER SUPPLY CIRCUITS

1 Turn ignition switch OFF.
2 Disconnect BCM connector M20.
3 Check continuity between BCM connector M20 and sunroof motor assembly connector B83.






4 Check continuity between BCM connector M20 and ground.






Are the continuity test results as specified?
YES
GO TO 6
NO
Repair or replace harness.

6. CHECK BCM OUTPUT SIGNAL

1 Connect BCM connector M20.





2 Turn ignition switch ON.
3 Check voltage between BCM connector M20 and ground.






Is the voltage reading as specified?
YES
Check condition of harness and connector.
NO
Replace BCM. Refer to [BCM: Removal and Installation] Removal and Replacement.

7. CHECK GROUND CIRCUIT

1 Turn ignition switch OFF.





2 Check continuity between sunroof motor assembly connector B83 terminal 10 and ground.






Is the continuity test result as specified?
YES
Inspection End.
NO
Repair or replace harness.

Special Repair Requirement

1. PERFORM INITIALIZATION PROCEDURE

Perform initialization procedure.

Refer to [Additional Service When Replacing Control Unit] Procedures.

Does the sunroof motor assembly operate properly?
YES
Repair is complete.
NO
Check fitting adjustment.