Diagnostic Aids
The sunroof switch close vent signal circuit can cause the sunroof not to respond correctly, if it were an open or a short to voltage. 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.
Test Description
The step below refers to the step number on the diagnostic table.
Step | Action | Values | Yes | No |
|---|---|---|---|---|
Schematic Reference: Sunroof Schematics Connector End View Reference: Power Roof Systems Connector End Views | ||||
1 | Did you perform the Diagnostic System Check - Vehicle? | -- | Go to Step 2 | Go to Diagnostic System Check - Vehicle in Vehicle DTC Information |
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 13 | 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 close vent signal circuit of the sunroof vent switch and a good ground. Is the voltage within the specified range? | 10-15 V | Go to Step 12 | Go to Step 7 |
6 | Connect a 3-amp fused jumper wire between the sunroof switch close vent signal circuit of the sunroof vent switch and the ground circuit of the sunroof vent switch. Does the sunroof close? | -- | Go to Step 14 | Go to Step 9 |
7 |
Is the voltage within the specified range? | 10-15 V | Go to Step 11 | Go to Step 8 |
Measure the voltage between the battery positive voltage of the sunroof module harness connector and a good ground. Is the voltage within the specified range? | 10-15 V | Go to Step 17 | Go to Retained Accessory Power (RAP) Inoperative in Computer/Integrating Systems | |
9 |
Is the resistance less than the specified value? | 3 ohms | Go to Step 10 | Go to Step 18 |
10 |
With the sunroof switch pressed, is the voltage within the specified range? | 10-15 V | Go to Step 16 | Go to Step 15 |
11 | Test the sunroof switch close vent signal circuit of the sunroof vent 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 22 | Go to Step 15 |
12 | Test the ground circuit of the sunroof vent 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 22 | Go to Step 15 |
13 | Test the battery voltage supply circuit of the sunroof module 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 22 | Go to Step 15 |
14 | 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 22 | Go to Step 19 |
15 | 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 22 | Go to Step 20 |
16 | 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 22 | Go to Step 21 |
17 | 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 22 | -- |
18 | Repair an open or high resistance in the motor control circuits of the sunroof module. Refer to Wiring Repairs in Wiring Systems. Did you find and correct the condition? | -- | Go to Step 22 | -- |
19 | Replace the sunroof vent switch. Refer to Sunroof Switch Replacement . Did you complete the replacement? | -- | Go to Step 22 | -- |
20 | Replace the sunroof module. Refer to Control Module References in Computer/Integrating Systems for replacement, setup, and programming. Did you complete the replacement? | -- | Go to Step 22 | -- |
21 |
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 22 | -- |
22 |
Did you correct the condition? | -- | System OK | Go to Step 2 |
