Diagnostic Aids
WARNING: This page is about a different car, the 2004 Pontiac Sunfire and 2004 Chevrolet Cavalier. However, it is still accessible from the selected car via links, so may be relevant.
The sunroof limit switch soft stop signal circuit can cause the sunroof not to respond correctly, if it were an open. Refer to Circuit Testing and Wiring Repairs in Wiring Systems. If the circuits test OK, an intermittent or poor connection can also cause the sunroof not to operate normally. Refer toTesting for Intermittent Conditions and Poor Connections in Wiring Systems.
Power Sunroof Does Not Close from Vent Position
| Step | Action | Value(s) | Yes | No |
|---|---|---|---|---|
| Schematic Reference: Power Sunroof Schematics Connector End Views Reference: Power Roof Systems Connector End Views DEFINITION: The sunroof glass will only move slightly in between the vent and closed position. |
||||
| 1 | Did you review the Power Sunroof Description and Operation? | - | Go to Step 2 | Go to Symptoms - Roof |
| 2 | Operate the power sunroof system. Does the system operate normally? |
- | Go to Diagnostic Aids | Go to Step 3 |
| 3 | Measure the reference voltage of the sunroof limit switch soft stop signal circuit at the sunroof control harness connector to a good ground. Does the reference voltage measure near the specified value? |
4.5-5.5 V | Go to Step 4 | Go to Step 8 |
| 4 |
NOTE:
Do not open the sunroof glass past the full open soft stop position. Doing so may damage the sunroof assembly and or the roof top.
|
- | Go to Step 5 | Go to Step 10 |
| 5 | Test the sunroof limit switch soft stop signal circuit for an open or high resistance. Refer to Circuit Testing
and Wiring Repairs
in Wiring Systems. Did you find and correct the condition? |
- | Go to Step 11 | Go to Step 7 |
| 6 | Test the sunroof limit switch low reference circuit for an open between the soft stop limit switch and splice. Refer to Circuit Testing
and Wiring Repairs
in Wiring Systems. Did you find and correct the condition? |
- | Go to Step 11 | Go to Step 7 |
| 7 | Inspect for a poor connection at the harness connection of the soft stop limit switch. 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 11 | Go to Step 9 |
| 8 | Inspect for poor connection at the harness connector of the sunroof control module. 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 11 | Go to Step 10 |
| 9 | Replace the sunroof limit switch. Refer to Sunroof Motor/Actuator Replacement . Did you complete the replacement? |
- | Go to Step 11 | - |
| 10 | Replace the sunroof control module. Refer to Sunroof Control Module Replacement . Did you complete the replacement? |
- | Go to Step 11 | - |
| 11 |
|
- | System OK | Go to Step 2 |