Diagnostic Aids
WARNING: This page is about a different car, the 2006 Buick LaCrosse and 2006 Buick Allure. However, it is still accessible from the selected car via links, so may be relevant.
The sunroof motor and sunroof module are integral parts of an assembly and are not serviced separately.
If voltage is not measured on the sunroof switch open signal or sunroof switch close signal circuits, the fault could be in the accessory voltage circuit, battery positive voltage circuit, or sunroof motor/module ground circuit. If the sunroof motor/module is not being powered, neither will the sunroof switch signal circuits.
Power Sunroof Inoperative (1 Connector System)
| Step | Action | Values | Yes | No |
|---|---|---|---|---|
| Schematic Reference: Power Sunroof Schematics Connector End View Reference: Power Roof Systems Connector End Views DEFINITION: This diagnostic procedure is to be used for the one connector sunroof system that combines the sunroof control module with the sunroof motor/actuator. |
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| 1 | Did you perform the Diagnostic System Check - Vehicle? | - | Go to Step 2 | Go to Diagnostic System Check - Vehicle in Vehicle DTC Information |
| 2 | Attempt to operate the sunroof through its full range of functions in order to verify that the power sunroof inoperative fault is present. Does the power sunroof system operate normally? |
- | Go to Testing for Intermittent Conditions and Poor Connections in Wiring Systems | Go to Step 3 |
| 3 | Perform the sunroof re-initialization. Refer to Sunroof Control Module Programming and Setup (One Connector System)
in Programming and Setup. Does the sunroof operate normally? |
- | Go to Step 17 | Go to Step 4 |
| 4 |
|
9-16 V | Go to Step 5 | Go to Step 13 |
| 5 |
|
5 Ω | Go to Step 6 | Go to Step 14 |
| 6 |
|
5 Ω | Go to Step 7 | Go to Step 10 |
| 7 | Is the sunroof in the fully closed position? | - | Go to Step 8 | Go to Step 9 |
| 8 |
|
- | Go to Step 15 | Go to Step 11 |
| 9 |
|
- | Go to Step 15 | Go to Step 12 |
| 10 | Test for an open or a poor connection in the sunroof switch low reference circuit. Refer to Testing for Intermittent Conditions and Poor Connections
and Connector Repairs
in Wiring Systems. Did you find and correct the condition? |
- | Go to Step 17 | Go to Step 16 |
| 11 | Test the sunroof switch close signal circuit for a short to ground or an open. Refer to Circuit Testing
and Wiring Repairs
in Wiring Systems. Did you find and correct the condition? |
- | Go to Step 17 | Go to Step 16 |
| 12 | Test the sunroof switch open signal circuit for a short to ground or an open. Refer to Circuit Testing
and Wiring Repairs
in Wiring Systems. Did you find and correct the condition? |
- | Go to Step 17 | Go to Step 16 |
| 13 | Repair a poor connection or an open in the accessory voltage circuit. Refer to Circuit Testing
and Wiring Repairs
in Wiring Systems. Did you complete the repair? |
- | Go to Step 17 | - |
| 14 | Repair a poor connection or an open in the ground circuit of the sunroof motor/actuator. Refer to Circuit Testing
and Wiring Repairs
in Wiring Systems. Did you complete the repair? |
- | Go to Step 17 | - |
| 15 | Replace the sunroof switch. Refer to Sunroof Switch Replacement . Did you complete the replacement? |
- | Go to Step 17 | - |
| 16 | Replace the sunroof motor/actuator. Refer to Control Module References
in Computer/Integrating Systems for replacement, setup, and programming. Did you complete the repair? |
- | Go to Step 17 | - |
| 17 | Operate the system in order to verify the repair. Did you find and correct the condition? |
- | System OK | Go to Step 2 |