Diagnostic Aids
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 to Testing for Intermittent Conditions and Poor Connections in Wiring Systems.
Step | Action | Value(s) | Yes | No |
|---|---|---|---|---|
Schematic Reference: Sunroof Schematics 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 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 7 |
4 |
Does the system operate as requested? | 10-15 V | Go to Step 5 | Go to Step 9 |
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 10 | Go to Step 6 |
6 | Inspect for a poor connection at the harness connector of the sunroof 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 10 | Go to Step 8 |
7 | Inspect for poor connection at the harness connector of the sunroof 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 10 | Go to Step 9 |
8 | Replace the sunroof limit switch. Refer to Sunroof Actuator Replacement . Did you complete the replacement? | -- | Go to Step 10 | -- |
9 | Replace the sunroof module. Refer to Power Sunroof Express Module Replacement . Did you complete the replacement? | -- | Go to Step 10 | -- |
10 |
Did you correct the condition? | -- | System OK | Go to Step 2 |
