Test Description
WARNING: This page does not describe the selected car, but rather 6 other vehicles, including the 2004 Oldsmobile Bravada, 2004 GMC Envoy XUV, 2004 GMC Envoy XL, 2004 GMC Envoy, and 2004 Chevrolet TrailBlazer. However, it is still accessible from the selected car via links, so may be relevant.
The numbers below refer to the step numbers on the diagnostic table.
- 3: This step is used to determine the correct diagnostic path. The path depends on if the sunroof is inoperative and in the open position, or if the sunroof is inoperative and in the closed position.
- 4: This step tests the sunroof switch open switch.
- 7: This step tests the sunroof switch close switch.
Power Sunroof Inoperative Diagnostic Test
| Step | Action | Value(s) | Yes | No |
|---|---|---|---|---|
| Schematic Reference: Power Sunroof Schematics Connector End View Reference: Power Roof Systems Connector End Views |
||||
| 1 | Did you perform the Power Sunroof Diagnostic System Check? | - | Go to Step 2 | Go to Diagnostic System Check - Power Sunroof |
| 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 | Is the sunroof in the fully closed position? | - | Go to Step 4 | Go to Step 7 |
| 4 |
|
- | Go to Step 17 | Go to Step 5 |
| 5 |
|
B+ | Go to Step 13 | Go to Step 6 |
| 6 | Measure the voltage from the sunroof switch open signal circuit of the sunroof switch harness connector to a good ground. Does the voltage measure near the specified value? |
B+ | Go to Step 14 | Go to Step 10 |
| 7 |
|
- | Go to Step 17 | Go to Step 8 |
| 8 |
|
B+ | Go to Step 15 | Go to Step 9 |
| 9 | Measure the voltage from the sunroof switch close signal circuit of the sunroof switch harness connector to a good ground. Does the voltage measure near the specified value? |
B+ | Go to Step 14 | Go to Step 10 |
| 10 |
|
B+ | Go to Step 11 | Go to Step 19 |
| 11 | Measure the voltage from the retained accessory power (RAP) supply voltage circuit of the sunroof motor harness connector to a good ground. Does the voltage measure near the specified value? |
B+ | Go to Step 12 | Go to Symptoms - Retained Accessory Power in Retained Accessory Power |
| 12 |
|
5 Ω | Go to Step 16 | Go to Step 20 |
| 13 | Test the sunroof switch close signal circuit for a short to ground. Refer toCircuit Testing
and Wiring Repairs
in Wiring Systems. Did you find and correct the condition? |
- | Go to Step 23 | Go to Step 18 |
| 14 | Test the sunroof switch low reference circuit for an open. Refer to Circuit Testing
and Wiring Repairs
in Wiring Systems. Did you find and correct the condition? |
- | Go to Step 23 | Go to Step 18 |
| 15 | Test the sunroof switch open signal circuit for a short to ground. Refer toCircuit Testing
and Wiring Repairs
in Wiring Systems. Did you find and correct the condition? |
- | Go to Step 23 | Go to Step 18 |
| 16 | Test the appropriate sunroof switch signal circuit for an open. Refer to Circuit Testing
and Wiring Repairs
in Wiring Systems. Did you find and correct the condition? |
- | Go to Step 23 | Go to Step 18 |
| 17 | Inspect for poor connections at the harness connector of the sunroof 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 23 | Go to Step 21 |
| 18 | Inspect for poor connections at the harness connectors of the sunroof motor. 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 23 | Go to Step 22 |
| 19 | Repair the short to ground or open in the sunroof motor battery positive voltage circuit. Refer to Wiring Repairs
and Connector Repairs
in Wiring Systems. Did you complete the repair? |
- | Go to Step 23 | - |
| 20 | Repair the open in the sunroof motor ground circuit. Refer to Wiring Repairs
and Connector Repairs
in Wiring Systems. Did you complete the repair? |
- | Go to Step 23 | - |
| 21 | Replace the sunroof switch. Refer to Sunroof Switch Replacement . Did you complete the replacement? |
- | Go to Step 23 | - |
| 22 | Replace the sunroof motor. Refer to Sunroof Motor/Actuator Replacement (Old Style PEZ) Sunroof Motor/Actuator Replacement (New Style MD4) . Did you complete the replacement? |
- | Go to Step 23 | - |
| 23 | Operate the system in order to verify the repair. Did you find and correct the condition? |
- | System OK | Go to Step 2 |