Switch - Power Sunroof

Any diagnosis of the power sunroof system should begin with the use of a scan tool and POWER TOP - ELECTRICAL DIAGNOSIS . The scan tool can provide confirmation that the Controller Area Network (CAN) Data Bus circuit is functional, that all of the electronic modules are sending and receiving the proper messages on the CAN Data Bus, and that the power sunroof motor/module assembly is being sent the proper hard wired output by the sunroof switch.

For complete circuit diagrams, refer to SYSTEM WIRING DIAGRAMS . The wiring information includes wiring diagrams, proper wire and connector repair procedures, details of wire harness routing and retention, connector pin-out information and location views for the various wire harness connectors, splices and grounds. If completing the appropriate diagnostic information results in the sunroof switch being inoperative, perform the following test prior to switch replacement.

Fig 1: Identifying Power Sunroof Switch Terminal Connectors

Courtesy of DAIMLERCHRYSLER CORP.

1. Disconnect and isolate the battery negative cable.
2. Remove the overhead console, (Refer to ELECTRICAL/OVERHEAD CONSOLE - REMOVAL) .
3. Disconnect the power sunroof switch wire harness connector.
4. Using an ohmmeter, test the continuity of the power sunroof switch in each switch position. Refer to POWER SUNROOF SWITCH CONTINUITY TABLE . If OK, inspect the wiring harness and connectors for damage. Use a scan tool and POWER TOP - ELECTRICAL DIAGNOSIS to complete diagnosis of the power sunroof system. If not OK, replace the overhead console.