Diagnostic Aids
An intermittent or poor connection can cause the sunroof not to operate properly. 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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Testing the other sunroof switch input circuits for a reference voltage. If a reference voltage is not present, a short to ground in the input circuit will inhibit the system operation.
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Test for battery voltage (B+) in the supply circuit of the sunroof module. If voltage is not present, go to the RAP Inoperative table.
Step | Action | Value(s) | Yes | No |
|---|---|---|---|---|
Schematic Reference: 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 | |
2 | Verify that the customer complaint is still present. Does the sunroof operate OK? | -- | Go to Diagnostic Aids | Go to Step 3 |
3 | Inspect the RAP fuse for an open. Is the fuse open? | -- | Go to Step 16 | Go to Step 4 |
4 |
Is the voltage within the specified range? | 10-15 V | Go to Step 6 | Go to Step 5 |
5 | Measure the voltage between the sunroof switch open signal circuit of the sunroof slide switch and a good ground. Is the voltage within the specified range? | 10-15 V | Go to Step 14 | Go to Step 8 |
Measure the voltage between the other switch input circuits of the sunroof switches and a good ground. Is the voltage within the specified range? | 10-15 V | Go to Step 7 | Go to Step 15 | |
7 | Connect a 3-amp fused jumper wire between the sunroof switch open signal circuit and the sunroof switch low reference circuit of the sunroof slide switch, for 3 seconds. Does the sunroof open? | -- | Go to Step 18 | Go to Step 11 |
8 | Measure the voltage between the other switch input circuits of the sunroof switches and a good ground. Is the voltage within the specified range? | 10-15 V | Go to Step 13 | Go to Step 9 |
9 |
Is the voltage within the specified range? | 10-15 V | Go to Step 20 | Go to Step 10 |
Measure the voltage between the battery positive voltage circuit of the sunroof module harness connector and a good ground. Is the voltage within the specified range? | 10-15 V | Go to Step 22 | Go to Retained Accessory Power (RAP) Inoperative in Retained Accessory Power | |
11 |
Is the resistance less than the specified value? | 3 ohms | Go to Step 12 | Go to Step 23 |
12 |
Ignoring polarity, is the voltage within the specified range? | 10-15 V | Go to Step 21 | Go to Step 19 |
13 | Test the sunroof switch open signal circuit of the sunroof slide switch for an open or short to ground. Refer to Circuit Testing and Wiring Repairs in Wiring Systems. Did you find and correct the condition? | -- | Go to Step 27 | Go to Step 20 |
14 | Test the sunroof switch low reference 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 27 | Go to Step 20 |
15 | Test the switch input circuit of the sunroof switches for a short to ground. Refer to Circuit Testing and Wiring Repairs in Wiring Systems. Did you find and correct the condition? | -- | Go to Step 27 | Go to Step 20 |
16 | Test the battery positive voltage circuit of the sunroof module for a short to ground. Refer to Circuit Testing and Wiring Repairs to in Wiring Systems. Did you find and correct the condition? | -- | Go to Step 27 | Go to Step 17 |
17 | Test the sunroof motor control circuits of the sunroof module for short to ground. Refer to Circuit Testing and Wiring Repairs in Wiring Systems. Did you find and correct the condition? | -- | Go to Step 27 | Go to Step 21 |
18 | Inspect for a poor connection 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 27 | Go to Step 24 |
19 | Test the sunroof switch open signal circuit of the sunroof slide switch 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 27 | Go to Step 20 |
20 | 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 27 | Go to Step 25 |
21 | Inspect for a poor connection at the harness connector 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 27 | Go to Step 26 |
22 | Repair an open or high resistance in the ground circuit of the sunroof module. Refer to Wiring Repairs in Wiring Systems. Did you find and correct the condition? | -- | Go to Step 27 | -- |
23 | Repair an open or high resistance in the sunroof motor control circuits of the sunroof module. Refer to Wiring Repairs in Wiring Systems. Did you find and correct the condition? | -- | Go to Step 27 | -- |
24 | Replace the sunroof slide switch. Refer to Sunroof Switch Replacement . Did you complete the replacement? | -- | Go to Step 27 | -- |
25 | Replace the sunroof module. Refer to Sunroof Control Module Replacement Did you complete the replacement? | -- | Go to Step 27 | -- |
26 |
Important: Inspect the sunroof assembly for binding or mechanical failure. Replace the sunroof motor. Refer to Sunroof Motor/Actuator Replacement . Did you complete the replacement? | -- | Go to Step 27 | -- |
27 |
Did you correct the condition? | -- | System OK | Go to Step 2 |
