Diagnostic Aids
Refer to Testing for Electrical Intermittents and Testing for Intermittent Conditions and Poor Connections in Wiring Systems.
Test Description
The steps below refer to the test steps in the diagnostic table.
Step | Action | Value(s) | Yes | No |
|---|---|---|---|---|
Schematic Reference: Sunroof Schematics | ||||
1 | Did you perform A Diagnostic System Check - Power Sunroof? | -- | Go to Step 2 | |
2 |
Does the sunroof close flush, from the vent to seal position? | -- | Go to Diagnostic Aids | Go to Step 3 |
3 | Test the 20 amp RAP fuse in the rear fuse block. Was the fuse blown? | -- | Go to Step 11 | Go to Step 4 |
Did the power sunroof close but not seat properly? | -- | Go to Step 5 | Go to Step 8 | |
5 |
Is the voltage within the specified value? | 10-15 V | Go to Step 6 | Go to Step 7 |
6 | Measure the voltage across the limit switch harness connector. Is the voltage within the specified value? | 10-15 V | Go to Step 25 | Go to Step 21 |
7 | Measure the resistance of the sunroof limit switch soft stop signal circuit. Is the resistance within the specified value? | 1-3 ohms | Go to Step 25 | Go to Step 22 |
8 |
Does the sunroof close? | -- | Go to Step 9 | Go to Step 13 |
9 | Test for poor connection / terminal tension at the power sunroof switch harness connector. Did you find and correct the condition? | -- | Go to Step 29 | Go to Step 10 |
10 | Replace the power sunroof switch. Refer to Sunroof Switch Replacement . Did you complete the replacement? | -- | Go to Step 29 | -- |
11 |
Is the resistance within the specified value? | OL | Go to Symptoms - Retained Accessory Power in Retained Accessory Power | Go to Step 12 |
12 | Repair short to ground in the power sunroof control module RAP relay switch supply voltage circuit. Did you find and correct the condition? | -- | Go to Step 29 | -- |
13 |
Is the resistance within the specified value? | 1-3 ohms | Go to Step 14 | Go to Step 16 |
14 | Measure the resistance between the sunroof switch open vent signal terminal of the power sunroof switch harness connector and the sunroof switch vent open terminal of the power sunroof control module harness connector. Is the resistance within the specified value? | 1-3 ohms | Go to Step 15 | Go to Step 16 |
15 | Measure the resistance between the sunroof switch low reference terminal of the power sunroof switch harness connector and the sunroof switch low reference terminal of the power sunroof control module harness connector. Is the resistance within the specified value? | 1-3 ohms | Go to Step 17 | Go to Step 16 |
16 | Repair open circuit between the power sunroof switch and the power sunroof control module. Did you find and correct the condition? | -- | Go to Step 29 | -- |
17 |
Is the voltage within the specified value? | 10-15 V | Go to Step 19 | Go to Step 18 |
18 | Repair open circuit in the power sunroof control module RAP relay switch supply voltage circuit. Did you find and correct the condition? | -- | Go to Step 29 | -- |
19 | Measure the voltage between the power sunroof control module 4-wire harness connector RAP relay switch supply voltage and ground terminals . Is the voltage within the specified value? | 10-15 V | Go to Step 23 | Go to Step 20 |
20 | Repair open circuit in the power sunroof control module ground circuit. Did you find and correct the condition? | -- | Go to Step 29 | -- |
21 | Repair open circuit in the sunroof limit switch low reference circuit. Did you find and correct the condition? | -- | Go to Step 29 | Go to Step 26 |
22 | Repair open circuit in the sunroof limit switch soft stop signal circuit. Did you find and correct the condition? | -- | Go to Step 29 | -- |
23 |
Ignoring polarity, is the voltage within the specified value? | 10-15 V | Go to Step 25 | Go to Step 24 |
24 | Test for an open in the 2-wire power sunroof motor circuit. Did you find and correct the condition? | -- | Go to Step 29 | Go to Step 26 |
25 | Test for poor connections/ terminal tension at the power sunroof motor assembly harness connector. Refer to Testing for Intermittent Conditions and Poor Connections and Connector Repairs in Wiring Repairs. Did you find and correct the condition? | Go to Step 29 | Go to Step 27 | |
26 | Test for poor connections/ terminal tension at the power sunroof module harness connector. Refer to Testing for Intermittent Conditions and Poor Connections and Connector Repairs in Wiring Repairs. Did you find and correct the condition? | Go to Step 29 | Go to Step 26 | |
27 |
Important: Check the power sunroof assembly for binding or mechanical failure. Replace the power sunroof motor assembly. Refer to Power Sunroof Motor Replacement . Did you complete the replacement? | -- | Go to Step 29 | -- |
28 | Replace the power sunroof control module. Refer to Power Sunroof Express Module Replacement . Did you complete the replacement? | -- | Go to Step 29 | -- |
29 | Operate the system in order to verify the repair. Did you correct the condition? | -- | System OK | Go to Step 2 |
