Diagnostic Starting Point

DIAGNOSTIC STARTING POINT

Before beginning sunroof diagnostics verify that all other power accessories are in proper operating condition. For electrical diagnostic information follow the chart "Sunroof Diagnosis Chart" Sunroof Module (SUNR) Also refer to Wiring Diagrams, in this publication for circuit, splice and component descriptions.

Before beginning diagnosis for wind noise or water leaks, verify that the sunroof is in a fully closed position. A common problem is the sunroof is left in an open position, this can be caused by releasing the control switch before the sunroof was fully closed. The sunroof module is equipped with a water-management system. If however, the sunroof glass is in a partial closed position, high pressure water may be forced beyond the water management system boundaries and onto the headlining.

MECHANICAL SUNROOF DIAGNOSIS





WATER DRAINAGE AND WIND NOISE DIAGNOSIS

Adequate drainage is provided by a drain trough in the sunroof housing which encircles the sliding glass panel and leads to drain hoses. If a wet headliner or other water leak complaints are encountered, before performing any adjustments, first ensure that the drainage system is not plugged or disconnected. Use a pint container to pour water into the sunroof housing drain trough. If water flow is restricted, use compressed air to blow out any material plugging the drain system. Retest system again.

To further check for a disconnected drain hose:

1. Lower headliner as necessary to gain access to sunroof housing drain tubes. Headliner - Removal
2. Repair as necessary.
3. Install headliner. Headliner - Installation

The sliding glass panel is designed to seal water entry with a snug fit between the roof and the seal. The fit can be checked by inserting a piece of paper between the roof and the seal. The piece of paper should have some resistance when pulled out when the glass panel is in the closed position. The sunroof housing will drain off a minimum amount of water. Excessive wind noise could result if the gap clearances are exceeded. The sunroof glass panel may need to be adjustedAdjustments for proper procedures.