Diagnostic Aids
An intermittent or poor connection can cause the express open feature of the sunroof not to operate. Refer to Testing for Intermittent Conditions and Poor Connections in Wiring Systems.
Test Description
The steps below refer to the test steps in the diagnostic table.
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Connect a 3-amp fused jumper to the sunroof switch open signal circuit and express signal circuit of the sunroof slide switch, then connect to ground circuit of the sunroof slide switch for less than 1 second. If this procedure is not performed correctly, the express open command will not function.
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Testing for a short to B+, other than the supplied reference voltage, in the sunroof switch express signal circuit. If voltage is present this would cause the express open feature to become inoperative.
Step | Action | Value(s) | Yes | No |
|---|---|---|---|---|
Schematic Reference: Sunroof Schematics Connector End View Reference: Power Roof Systems Connector End Views DEFINITION: Express Open feature inoperative. | ||||
1 | Did you perform the Power Sunroof Diagnostic System Check? | -- | Go to Step 2 | |
2 |
Does the sunroof open to the EXPRESS OPEN position? | -- | Go to Diagnostic Aids | Go to Step 3 |
3 |
Is the voltage within the specified range? | 10-15 V | Go to Step 5 | Go to Step 4 |
4 | Measure the voltage between the sunroof switch express signal circuit of the sunroof slide switch harness connector to a good ground. Is the voltage within the specified range? | 10-15 V | Go to Step 7 | Go to Step 8 |
Connect a 3-amp fused jumper between the sunroof switch express signal and the sunroof switch open signal circuits to the sunroof switch low reference circuit of the sunroof slide switch harness connector for less than 1 second. Does the sunroof open to the EXPRESS OPEN position? | -- | Go to Step 9 | Go to Step 6 | |
Test the sunroof switch express 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 13 | Go to Step 12 | |
7 | Test the ground circuit of the sunroof slide switch 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 13 | Go to Step 10 |
8 | Test the sunroof switch express open circuit of the sunroof slide switch harness 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 13 | Go to Step 10 |
9 | Inspect for poor connections at the harness connector of the sunroof switches. 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 13 | Go to Step 11 |
10 | Inspect for poor connections 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 13 | Go to Step 12 |
11 | Replace the sunroof slide switch. Refer to Sunroof Switch Replacement . Did you complete the replacement? | -- | Go to Step 13 | -- |
12 | Replace the sunroof module. Refer to Sunroof Control Module Replacement Did you complete the replacement? | -- | Go to Step 13 | -- |
13 |
Did you correct the condition? | -- | System OK | Go to Step 2 |
