Test Description
WARNING: This page is about a different car, the 2004 Pontiac Aztek and 2004 Buick Rendezvous. 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.
- 4: If the sunroof switch open signal circuit is jumpered first, this may cause the window to express open. Jumpering the sunroof switch close signal circuit will halt the express open feature. To close the sunroof glass, the sunroof switch close signal circuit will need to be jumpered again, and maintained to continue to close the sunroof glass.
- 17: Disconnecting the connector to the sunroof opening position switch (SOPS), and shorting the SOPS vent signal circuit to the SOPS low reference circuit, will simulate that the glass is in a position other than full vent or full open position. This will allow any request from the sunroof switch to supply an output to drive the motor for testing the status of the SOPS.
- 18: Checking the sunroof motor open and close output circuits, when idle, both should be at ground potential.
Power Sunroof Inoperative
| 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 Diagnostic System Check - Power Sunroof? | - | Go to Step 2 | Go to Diagnostic System Check - Power Sunroof |
| 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 |
|
- | Go to Step 4 | Go to Retained Accessory Power (RAP) Inoperative in Retained Accessory Power |
| 4 |
|
- | Go to Step 40 | Go to Step 5 |
| 5 |
|
4.5-5.5 V | Go to Step 6 | Go to Step 20 |
| 6 | Measure the reference voltage of the sunroof switch close signal circuit at the sunroof switch harness connector to a good ground. Does the voltage measure within the specified range? |
4.5-5.5 V | Go to Step 7 | Go to Step 25 |
| 7 | 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 within the specified range? |
4.5-5.5 V | Go to Step 8 | Go to Step 30 |
| 8 |
|
4.5-5.5 V | Go to Step 9 | Go to Step 11 |
| 9 | Measure the reference voltage of the SOPS soft stop signal circuit at the SOPS harness connector to a good ground. Refer to Circuit Testing
in Wiring Systems. Does the voltage measure within the specified range? |
4.5-5.5 V | Go to Step 10 | Go to Step 13 |
| 10 | Measure the reference voltage between the SOPS soft stop signal circuit and the SOPS low reference circuit at the SOPS harness connector. Refer to Circuit Testing
in Wiring Systems. Does the voltage measure within the specified range? |
4.5-5.5 V | Go to Step 17 | Go to Step 15 |
| 11 | Test the SOPS range signal circuit for an open, high resistance or a short to ground. Refer to Circuit Testing
and Wiring Repairs
in Wiring Systems. Did you find and correct the condition? |
- | Go to Step 53 | Go to Step 12 |
| 12 | Inspect for a poor connection in the SOPS range signal 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 53 | Go to Step 51 |
| 13 | Test the SOPS soft stop signal circuit for an open, high resistance or a short to ground. Refer to Circuit Testing
and Wiring Repairs
in Wiring Systems. Did you find and correct the condition? |
- | Go to Step 53 | Go to Step 14 |
| 14 | Inspect for a poor connection in the SOPS soft stop signal 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 53 | Go to Step 51 |
| 15 | Test the SOPS low reference 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 53 | Go to Step 16 |
| 16 | Inspect for a poor connection in the SOPS 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 53 | Go to Step 51 |
| 17 |
NOTE:
Avoid having the sunroof glass slide past the full open position. Since the sunroof opening position switch (SOPS) will be disconnected and jumpered, their is no way for the sunroof control module to understand what position the glass is in or moving to. Since the sunroof control module does not see any input changes from the limit switches, the sunroof glass cannot soft stop, which can cause the glass to exceed past the full open position, possibly damaging the sunroof assembly and/or the roof.
|
- | Go to Step 44 | Go to Step 18 |
| 18 |
|
- | Go to Step 32 | Go to Step 19 |
| 19 |
|
- | Go to Step 42 | Go to Step 35 |
| 20 | Did the reference voltage of the sunroof switch open signal circuit measure near the specified value? | B+ | Go to Step 22 | Go to Step 21 |
| 21 | Measure the reference voltage of the sunroof switch close signal circuit at the sunroof switch harness connector to a good ground. Does the voltage measure within the specified range? |
4.5-5.5 V | Go to Step 26 | Go to Step 23 |
| 22 | Measure the reference voltage of the sunroof switch close signal circuit at the sunroof switch harness connector to a good ground. Does the voltage measure within the specified range? |
4.5-5.5 V | Go to Step 39 | Go to Step 24 |
| 23 |
|
B+ | Go to Step 41 | Go to Step 45 |
| 24 |
|
B+ | Go to Step 41 | Go to Step 48 |
| 25 | Did the reference voltage of the close signal circuit measure near the specified value? | B+ | Go to Step 29 | Go to Step 27 |
| 26 | 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 53 | Go to Step 41 |
| 27 | 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 53 | Go to Step 28 |
| 28 | Inspect for a poor connection in the sunroof switch close signal 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 53 | Go to Step 51 |
| 29 | Test the sunroof switch close signal circuit for a short to B+. Refer to Circuit Testing
and Wiring Repairs
in Wiring Systems. Did you find and correct the condition? |
- | Go to Step 53 | Go to Step 51 |
| 30 | Test the sunroof switch low reference circuit for an open and a high resistance. Refer to Circuit Testing
and Wiring Repairs
in Wiring Systems. Did you find and correct the condition? |
- | Go to Step 53 | Go to Step 31 |
| 31 | Inspect for 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 53 | Go to Step 51 |
| 32 | Connect a test lamp between the sunroof motor/actuator open control circuit at the harness connector (module side) and a good ground. Does the test lamp illuminate? |
- | Go to Step 33 | Go to Step 34 |
| 33 | Test the sunroof motor/actuator open control circuit for a short to B+. Refer to Circuit Testing
and Wiring Repairs
in Wiring Systems. Did you find and correct the condition? |
- | Go to Step 53 | Go to Step 51 |
| 34 | Test the sunroof motor/actuator close control circuit for a short to B+. Refer to Circuit Testing
and Wiring Repairs
in Wiring Systems. Did you find and correct the condition? |
- | Go to Step 53 | Go to Step 51 |
| 35 | Connect a test lamp between the sunroof motor/actuator open control circuit to B+. Does the test lamp illuminate? |
- | Go to Step 36 | Go to Step 38 |
| 36 |
|
- | Go to Step 37 | Go to Step 47 |
| 37 | Test the sunroof motor/actuator close control 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 53 | Go to Step 41 |
| 38 | Test the sunroof motor/actuator open control 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 53 | Go to Step 43 |
| 39 | Test the sunroof switch open signal circuit for a short to B+. Refer to Circuit Testing
and Wiring Repairs
in Wiring Systems. Did you find and correct the condition? |
- | Go to Step 53 | Go to Step 51 |
| 40 | Inspect for a poor connection at the sunroof switch and 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 53 | Go to Step 50 |
| 41 | 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 53 | Go to Step 51 |
| 42 | Inspect for poor connections at the sunroof motor/actuator. 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 53 | Go to Step 52 |
| 43 | Inspect for poor connections in the sunroof motor/actuator open control 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 53 | Go to Step 51 |
| 44 | Inspect for a poor connections at the SOPS 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 53 | Go to Step 49 |
| 45 | Test for an open, high resistance or short to ground in the sunroof accessory voltage circuit. Refer to Circuit Testing
and Wiring Repairs
in Wiring Systems. Did you complete the repair? |
- | Go to Step 532 | Go to Step 46 |
| 46 | Test both of the sunroof motor/actuator control circuits for a short to ground. Refer to Circuit Testing
and Wiring Repairs
in Wiring Systems. Did you complete the repair? |
- | Go to Step 53 | Go to Step 47 |
| 47 |
|
- | Go to Step 53 | Go to Step 51 |
| 48 | 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 53 | - |
| 49 | Replace the SOPS module. Refer to Sunroof Opening Position Switch Replacement . Did you complete the repair? |
- | Go to Step 53 | - |
| 50 | Replace the power sunroof switch. Refer to Sunroof Switch Replacement . Did you complete the replacement? |
- | Go to Step 53 | - |
| 51 | Replace the power sunroof control module. Refer to Sunroof Control Module Replacement . Did you complete the replacement? |
- | Go to Step 53 | - |
| 52 | Replace the power sunroof motor/actuator. Refer to Sunroof Motor/Actuator Replacement (PES) . Did you complete the replacement? |
- | Go to Step 53 | - |
| 53 |
|
- | System OK | Go to Step 3 |