Note: Complete the following procedures before using the symptom tables.
| • | There are no DTCs set. | 
| • | The control modules can communicate via the serial data link. | 
| • | Inspect for aftermarket devices which may affect the operation of the power sunroof system. Refer to Checking Aftermarket Accessories. | 
| • | Inspect the accessible system components for obvious damage or for conditions which can cause the symptom. | 
Faulty electrical connections or wiring may be the cause of intermittent conditions. Refer to Testing for Intermittent Conditions and Poor Connections.
Refer to LINK.