Power Sunroof Inoperative
WARNING: This page is about a different car, the 2004 Pontiac Grand Prix. However, it is still accessible from the selected car via links, so may be relevant.
Power Sunroof Inoperative
| Step | Action | Value(s) | Yes | No |
|---|---|---|---|---|
| Schematic Reference: Power Sunroof Schematics Connector End Views Reference: Power Roof Systems Connector End Views |
||||
| 1 | Did you review the Power Sunroof Description and Operation and perform the necessary inspections? | - | Go to Step 2 | Go to Symptoms - Roof |
| 2 | Operate the power sunroof. Does the system operate normally? |
- | Go to Testing for Intermittent Conditions and Poor Connections in Wiring Systems | Go to Step 3 |
| 3 |
|
4.5-5.5 V | Go to Step 4 | Go to Step 7 |
| 4 | Measure the reference voltage of the sunroof switch close signal circuit at the sunroof switch harness connector to ground. Does the voltage measure near the specified value? |
4.5-5.5 V | Go to Step 5 | Go to Step 12 |
| 5 | Measure the reference voltage between the sunroof switch close signal circuit and the sunroof switch low reference circuit at the sunroof switch harness connector. Does the voltage measure near the specified value? |
4.5-5.5 V | Go to Step 6 | Go to Step 16 |
| 6 |
|
- | Go to Step 19 | Go to Step 7 |
| 7 | Did the reference voltage of the sunroof switch open signal circuit measure near the specified value? | 9-14 V | Go to Step 8 | Go to Step 9 |
| 8 | Measure the reference voltage of the sunroof switch close signal circuit at the sunroof switch harness connector to ground. Does the voltage measure near the specified value? |
9-14 V | Go to Step 11 | Go to Step 17 |
| 9 | Measure the reference voltage of the sunroof switch close signal circuit at the sunroof switch harness connector to ground. Does the voltage measure near the specified value? |
4.5-5.5 V | Go to Step 13 | Go to Step 10 |
| 10 |
|
9-14 V | Go to Step 20 | Go to Step 18 |
| 11 | Measure between the sunroof ignition 3 voltage circuit and the ground circuit at the sunroof control module harness connector. Does the voltage measure near the specified value? |
9-14 V | Go to Step 20 | Go to Step 21 |
| 12 | Did the reference voltage of the sunroof switch close signal circuit measure near the specified value? | 9-14 V | Go to Step 15 | Go to Step 14 |
| 13 | Test for an open, high resistance or short to ground in the sunroof switch open signal circuit. Refer to Circuit Testing
and Wiring Repairs
in Wiring Systems. Did you find and correct the condition? |
- | Go to Step 24 | Go to Step 20 |
| 14 | Test for an open, high resistance or short to ground in the sunroof switch close signal circuit. Refer to Circuit Testing
and Wiring Repairs
in Wiring Systems. Did you find and correct the condition? |
- | Go to Step 24 | Go to Step 20 |
| 15 | Test the sunroof switch close signal circuit for a short to battery positive voltage. Refer to Circuit Testing
and Wiring Repairs
in Wiring Systems. Did you find and correct the condition? |
- | Go to Step 24 | Go to Step 23 |
| 16 | Test the sunroof switch low reference circuit for an open, high resistance and for a short to battery positive voltage. Refer to Circuit Testing
and Wiring Repairs
in Wiring Systems. Did you find and correct the condition? |
- | Go to Step 24 | Go to Step 20 |
| 17 | Test the sunroof switch open signal circuit for a short to battery positive voltage. Refer to Circuit Testing
and Wiring Repairs
in Wiring Systems. Did you find and correct the condition? |
- | Go to Step 24 | Go to Step 23 |
| 18 | Test the ignition 3 voltage circuit for an open, high resistance or short to ground. Refer to Circuit Testing
and Wiring Repairs
in Wiring Systems. Did you find and correct the condition? |
- | Go to Step 24 | Go to Retained Accessory Power (RAP) Inoperative in Retained Accessory Power |
| 19 | Inspect for a poor connection at the sunroof switch harness connector. 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 24 | Go to Step 22 |
| 20 | Inspect for a poor connection at 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 24 | Go to Step 23 |
| 21 | Repair the ground circuit of the sunroof control module for an open or high resistance. Refer to Circuit Testing
and Wiring Repairs
in Wiring Systems. Did you complete the repair? |
- | Go to Step 24 | - |
| 22 | Replace the sunroof switch. Refer to Sunroof Switch Replacement . Did you complete the replacement? |
- | Go to Step 24 | - |
| 23 | Replace the sunroof control module. Refer to Sunroof Control Module Replacement . Did you complete the replacement? |
- | Go to Step 24 | - |
| 24 |
|
- | System OK | Go to Step 3 |