Aura L4-2.4L (2008)
Sunroof / Moonroof Drain: Procedures
Sunroof Drain Inspection and Cleaning
Drain Hose Routing
A drain trough encircles the sunroof window panel and water is drained off by the 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. Ensure that the front drain hoses are routed down the windshield pillars and out the center of the front pillar between the door hinges. Ensure that
the hoses are not kinked. Replace any torn or cracked hose. Refer to Sunroof Housing Front Drain Hose Replacement (See: Removal and
Replacement/Sunroof Housing Front Drain Hose Replacement).
2. Ensure that the rear drain hoses are routed through the rear pillars and out of the rear lower quarter panel. Ensure that the rear hoses are properly
routed in the metal roof slot and are attached in place. Replace any torn or cracked hose. Refer to Sunroof Housing Rear Drain Hose Replacement
(See: Removal and Replacement/Sunroof Housing Rear Drain Hose Replacement).
Plugged Drain Hose
If a waterleak has occurred, inspect for a plugged drain hose at each corner of the drainage system:
1. Open the sunroof window.
2. To test for blockage, pour a small container of water into the module housing drain trough. Inspect each corner to confirm the drain hose is
draining water.
Caution: Wear safety glasses in order to avoid eye damage.
3. Use compressed air, 35 psi or less, to blow out any drain hose that is plugged.
4. Test the system again.
5. If the hose remains plugged, inspect for improper routing or kinks. Refer to Drain Hose Routing above.
6. Remove any hoses that remain plugged. Refer to Sunroof Housing Front Drain Hose Replacement (See: Removal and Replacement/Sunroof
Housing Front Drain Hose Replacement) or to Sunroof Housing Rear Drain Hose Replacement (See: Removal and Replacement/Sunroof Housing
Rear Drain Hose Replacement).
7. Remove the blockage:
1. Push a mechanics wire through the hose to remove the obstruction.
2. Use compressed air in order to blow out any remaining material.
8. Reinstall the hose. Refer to Sunroof Housing Front Drain Hose Replacement (See: Removal and Replacement/Sunroof Housing Front Drain Hose
Replacement) or to Sunroof Housing Rear Drain Hose Replacement (See: Removal and Replacement/Sunroof Housing Rear Drain Hose
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 inspect for a
disconnected hose.
1. Open the sunroof window panel.
2. It is only necessary to lower the headliner. Only do those step in headliner replacement that will lower the headliner enough to gain access to the
part. Refer to Headlining Trim Panel Replacement (See: Interior Moulding / Trim/Headliner/Service and Repair).
3. Connect any disconnected hoses.
4. Ensure that the rear drain hoses are properly routed in the metal roof slot and attached in place.
