Inspection Procedure F-2

Sunroof: Any Of The Sunroof Switch Positions Is Defective.

Sunroof Switch Circuit:

TECHNICAL DESCRIPTION (COMMENT)
The sunroof switch or the sunroof motor assembly may be defective.

TROUBLESHOOTING HINTS
- Malfunction of the sunroof switch
- Malfunction of the sunroof motor assembly
- Damaged harness wires or connectors

DIAGNOSIS

Required Special Tools:
- MB991223: Test Harness Set
- MB991502: Scan Tool (MUT-II)

Check the input signal (by using the Pulse check).
Check the input signals from the sunroof switch.

CAUTION: To prevent damage to scan tool MB991502, always turn the ignition switch to the "LOCK" (OFF) position before connecting or disconnecting scan tool MB991502.




1. Connect scan tool MB991502 to the data link connector.
2. Operate the MUT-II according to the procedure below to display "PULSE CHECK."
1. Select "SYSTEM SELECT."
2. Select "SWS."
3. Select "PULSE CHECK."
3. When each function of the sunroof switch is operated (turned on), check that scan tool MB991502 sounds.

Q: Does scan tool MB991502 sound when the sunroof switch is operated?

YES: Replace the sunroof motor assembly. Check that the sunroof works at all positions normally.

NO: Refer to Inspection Procedure O-10 "ETACS-ECU does not receive a signal from "UP", "OPEN" or "CLOSE/DOWN" switch."