Sunroof Drain Inspection and Cleaning

Drain Hose Routing

Note

If the headliner is wet DO NOT remove any interior trim. Do the Plugged Drain Hose test first. A drain trough encircles the sunroof window panel and water is drained off by the drain hoses located at each corner of the housing. A drain channel spans across the sunroof module at the rear of the window panel and directs water into the trough.

1. The front drain hoses are routed out of the left and right corners of the plenum. The front hoses are installed through a rubber grommet that seals the hose tightly in the plenum.
2. The rear drain hoses are routed through the left and right rear lower quarter panel and out of the body. The rear hoses are installed through a rubber grommet that seals the hose tightly in the quarter panel. Plugged Drain Hose
3. Raise and support the vehicle. Lifting and Jacking the Vehicle
4. Remove the appropriate tire and wheel. Tire and Wheel Removal and Installation
5. Remove the appropriate wheelhouse liner. Rear Wheelhouse Liner Replacement
6. Remove the appropriate front air inlet grille panel: Air Inlet Grille Panel Extension Replacement In some vehicle it may be necessary to clean the sunroof drain hose by applying air from the lower end of the drain hose outlet instead of the upper drain hose outlet. If a waterleak has occurred check for a plugged sunroof module drain hose at each corner of drainage system by doing the following:
7. Open the sunroof window.
8. Locate each sunroof module drain hose outlet area.
9. With a visual look, ensure that all the hoses are attached to the sunroof module drain outlet.
10. Cover all of the interior before air is applied to the drain hose.
11. To test for blockage, pour a small container of water into the module housing drain trough. Check each corner to confirm the drain hose is draining water if not go to step number 6.

Warning

Wear safety glasses in order to avoid eye damage.

6. Use compressed air, 241 kPa (35 psi) or less to blow out any drain hose that is plugged.
7. Test the system again.
8. If the hose remains plugged remove the blockage using the following steps. 8.1. Push mechanics wire through the hose to remove the obstruction. 8.2. Use compressed air in order to blow out any remaining material.
9. If the hose remains plugged, check to see if it is properly routed. Sunroof Housing Front Drain Hose Replacement - Left Side Sunroof Housing Front Drain Hose Replacement - Right Side Sunroof Housing Rear Drain Hose Replacement - Left Side Sunroof Housing Rear Drain Hose Replacement - Right Side
10. Lower the vehicle. Lifting and Jacking the Vehicle
11. Install the appropriate tire and wheel. Tire and Wheel Removal and Installation
12. Install the appropriate wheelhouse liner. Rear Wheelhouse Liner Replacement
13. Install the appropriate front air inlet grille panel: Air Inlet Grille Panel Extension Replacement Disconnected Drain Hose Inspect the drainage system for disconnected drain hoses. Complete the following steps in order to obtain partial access to drain hoses and check for a disconnected hose.
14. Open the sunroof window panel.
15. Lower the headliner as needed. Headlining Trim Panel Replacement
16. Connect any disconnected hoses. If tie straps are required, connect the hose and apply tie strap.
17. Ensure that the rear drain hoses are properly routed in the metal roof slot and taped in place.