B3663 01

B3663 01

Sunroof Button, Output Short to B+







Fault symptom
- Sunroof cannot be operated.

On-board diagnosis

Type of diagnosis:
- Continuous

Enable criteria:
- When button pressed or sunroof motor active and when the engine is not cranking.

Fault criteria:
- When voltage on output exceeds 5 V.

System reaction to a fault:
- In case of a fault, the control module will ignore button presses.

Checking the wiring harness
- Move the wiring harness at several spots and in several directions to reveal intermittent breaks and short-circuits. Check switches, connectors and crimp connections for oxidation, retracted pins and pin clamping force.

Diagnostic help

Diagnosis regards:
- Electrical fault in connecting leads or component.

Functions in the diagnostic tool related to the fault:

Test value:
- Sunroof Switch
(See also description of readings/activations in diagnostic tool)