Power Sunshade Inoperative Front
Diagnostic Aids
If the front glass and/or front sunshade are experiencing an intermittent inoperative condition, check the sunroof switch ground circuit for an open condition. If the sunroof switch ground circuit is open, the switch may take a redundant path to ground through the illumination circuit. When the lights are turned ON, the redundant path is removed, and the sunroof and/or sunshade will become inoperative.
If both the front glass and the front sunshade are inoperative, the fault most likely is in the RAP relay switch supply voltage circuit, battery positive voltage circuit or front glass control module ground circuit. If the front glass control module is not being powered, neither will the front sunshade control module
If voltage is not measured on the front sunshade switch open signal or front sunshade switch close signal circuits, the fault could be in the RAP relay switch supply voltage circuit, battery positive voltage circuit, or front glass control module ground circuit. If the front glass control module is not being powered, neither will the front sunshade switch signal circuits.
If the sunshade switch open signal circuit or sunshade switch close signal circuit is found to be short to voltage, the sunroof switch will most likely be open.
Test Description
The numbers below refer to the step numbers in the diagnostic table.
-
This step is used to determine the correct diagnostic path. The path depends on if the front sunshade is inoperative and in the open position, or if the front sunshade is inoperative and in the closed position.
-
This step tests the front sunshade switch open switch.
-
This step tests the front sunshade switch close switch.
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 Diagnostic System Check - Vehicle? | -- | Go to Step 2 | Go to Diagnostic System Check - Vehicle in Vehicle DTC Information |
2 | Attempt to operate the front power sunshade in order to verify that it is inoperative. Does the front power sunshade operate normally? | -- | Go to Testing for Intermittent Conditions and Poor Connections in Wiring Systems | Go to Step 3 |
3 | Are both the front glass and the front sunshade inoperative? | -- | Go to Step 5 | Go to Step 4 |
Is the front sunshade in the fully closed position? | -- | Go to Step 9 | Go to Step 12 | |
5 |
Is the resistance less than the specified value? | 5 ohms | Go to Step 6 | Go to Step 22 |
6 |
Does the voltage measure near the specified value? | B+ | Go to Step 7 | Go to Symptoms - Computer/Integrating Systems in Computer/Integrating Systems |
7 | Measure the voltage from the battery positive voltage circuit of the front glass control module harness connector to the ground circuit of the front glass control module harness connector. Does the voltage measure near the specified value? | B+ | Go to Step 19 | Go to Step 8 |
8 | Measure the voltage from the battery positive voltage circuit of the front glass control module harness connector to a good ground. Does the voltage measure near the specified value? | B+ | Go to Step 23 | Go to Step 24 |
Did the front sunshade open? | -- | Go to Step 20 | Go to Step 10 | |
10 |
Does the voltage measure near the specified value? | B+ | Go to Step 11 | Go to Step 17 |
11 |
Does the voltage measure near the specified value? | B+ | Go to Step 25 | Go to Step 15 |
Did the front sunshade close? | -- | Go to Step 20 | Go to Step 13 | |
13 |
Does the voltage measure near the specified value? | B+ | Go to Step 14 | Go to Step 17 |
14 |
Does the voltage measure near the specified value? | B+ | Go to Step 25 | Go to Step 15 |
15 |
Does the voltage measure near the specified value? | B+ | Go to Step 18 | Go to Step 16 |
16 | Measure the voltage from the battery positive voltage circuit of the front sunshade control module harness connector to a good ground. Does the voltage measure near the specified value? | B+ | Go to Step 26 | Go to Step 27 |
17 | Test the appropriate front sunshade switch signal circuit for a short to ground or an open. Refer to Circuit Testing and Wiring Repairs in Wiring Systems. Did you find and correct the condition? | -- | Go to Step 31 | Go to Step 19 |
18 | Test the k-bus circuit for a short to ground, short to voltage, or an open. Refer to Circuit Testing and Wiring Repairs in Wiring Systems. Did you find and correct the condition? | -- | Go to Step 31 | Go to Step 21 |
19 | Inspect for poor connections at the harness connectors of the front glass control 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 31 | Go to Step 28 |
20 | Inspect for poor connections at the harness connector of the sunroof 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 31 | Go to Step 29 |
21 | Inspect for poor connections at the harness connector of the front sunshade control 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 31 | Go to Step 30 |
22 | Repair the open in the sunroof switch ground circuit. Refer to Wiring Repairs and Connector Repairs in Wiring Systems. Did you complete the repair? | -- | Go to Step 31 | -- |
23 | Repair the open in the front glass control module ground circuit. Refer to Wiring Repairs and Connector Repairs in Wiring Systems. Did you complete the repair? | -- | Go to Step 31 | -- |
24 | Repair the short to ground or open in the front glass control module battery positive voltage circuit. Refer to Wiring Repairs and Connector Repairs in Wiring Systems. Did you complete the repair? | -- | Go to Step 31 | -- |
25 | Repair the short to voltage in the appropriate front sunshade switch signal circuit. Refer to Circuit Testing and Wiring Repairs in Wiring Systems. Did you find and correct the condition? | -- | Go to Step 31 | -- |
26 | Repair the open in the front sunshade control module ground circuit. Refer to Wiring Repairs and Connector Repairs in Wiring Systems. Did you complete the repair? | -- | Go to Step 31 | -- |
27 | Repair the open in the front sunshade control module battery positive voltage circuit. Refer to Wiring Repairs and Connector Repairs in Wiring Systems. Did you complete the repair? | -- | Go to Step 31 | -- |
28 | Replace the front glass control module. Refer to Control Module References in Computer/Integrating Systems for replacement, setup, and programming. Did you complete the replacement? | -- | Go to Step 31 | -- |
29 | Replace the sunroof switch. Refer to Sunroof Switch Replacement . Did you complete the replacement? | -- | Go to Step 31 | -- |
30 | Replace the sunshade control module. Refer to Control Module References in Computer/Integrating Systems for replacement, setup, and programming. Did you complete the replacement? | -- | Go to Step 31 | -- |
31 | Operate the system in order to verify the repair. Did you find and correct the condition? | -- | System OK | Go to Step 2 |
Power Sunshade Inoperative Rear
Diagnostic Aids
If the rear sunshade is experiencing an intermittent inoperative condition, check the rear sunshade switch ground circuit for an open condition. If the rear sunshade switch ground circuit is open, the switch may take a redundant path to ground through the illumination circuit. When the lights are turned ON, the redundant path is removed, and the sunshade will become inoperative.
If voltage is not measured on the rear sunshade switch open signal or rear sunshade switch close signal circuits, the fault could be in the RAP relay switch supply voltage circuit, battery positive voltage circuit, or rear sunshade control module ground circuits. If the rear sunshade control module is not being powered, neither will the rear sunshade switch signal circuits.
If the rear sunshade switch open signal circuit or rear sunshade switch close signal circuit is found to be short to voltage, the rear sunshade switch will most likely be open.
Test Description
The numbers below refer to the step numbers on the diagnostic table.
-
This step is used to determine the correct diagnostic path. The path depends on if the sunshade is inoperative and in the open position, or if the sunshade is inoperative and in the closed position.
-
This step tests the rear sunshade switch open switch.
-
This step tests the rear sunshade switch close switch.
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 Diagnostic System Check - Vehicle? | -- | Go to Step 2 | Go to Diagnostic System Check - Vehicle in Vehicle DTC Information |
2 | Attempt to operate the rear sunshade in order to verify that the power sunshade is inoperative. Does the rear sunshade operate normally? | -- | Go to Testing for Intermittent Conditions and Poor Connections in Wiring Systems | Go to Step 3 |
Is the rear sunshade in the fully closed position? | -- | Go to Step 4 | Go to Step 8 | |
Did the rear sunshade open? | -- | Go to Step 16 | Go to Step 5 | |
Does the voltage measure near the specified value? | B+ | Go to Step 7 | Go to Step 6 | |
6 | Measure the voltage from the rear sunshade switch open signal circuit of the rear sunshade switch harness connector to a good ground. Does the voltage measure near the specified value? | B+ | Go to Step 18 | Go to Step 12 |
7 |
Does the voltage measure near the specified value? | B+ | Go to Step 19 | Go to Step 17 |
8 |
Did the rear sunshade close? | -- | Go to Step 16 | Go to Step 9 |
9 |
Does the voltage measure near the specified value? | B+ | Go to Step 11 | Go to Step 10 |
10 | Measure the voltage from the rear sunshade switch close signal circuit of the rear sunshade switch harness connector to a good ground. Does the voltage measure near the specified value? | B+ | Go to Step 18 | Go to Step 12 |
11 |
Does the voltage measure near the specified value? | B+ | Go to Step 19 | Go to Step 17 |
12 |
Does the voltage measure near the specified value? | B+ | Go to Step 13 | Go to Symptoms - Computer/Integrating Systems in Computer/Integrating Systems |
13 | Measure the voltage from the battery positive voltage circuit of the rear sunshade control module harness connector to the ground circuit of the rear sunshade control module harness connector. Does the voltage measure near the specified value? | B+ | Go to Step 15 | Go to Step 14 |
14 | Measure the voltage from the battery positive voltage circuit of the rear sunshade control module harness connector to a good ground. Does the voltage measure near the specified value? | B+ | Go to Step 20 | Go to Step 21 |
15 | Test the appropriate rear sunshade switch signal circuit for a short to ground or an open. Refer to Circuit Testing and Wiring Repairs in Wiring Systems. Did you find and correct the condition? | -- | Go to Step 24 | Go to Step 17 |
16 | Inspect for poor connections at the harness connector of the rear sunshade 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 24 | Go to Step 22 |
17 | Inspect for poor connections at the harness connector of the rear sunshade control 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 24 | Go to Step 23 |
18 | Repair the open in the rear sunshade switch ground circuit. Refer to Wiring Repairs and Connector Repairs in Wiring Systems. Did you complete the repair? | -- | Go to Step 24 | -- |
19 | Repair the short to voltage in the appropriate rear sunshade switch signal circuit. Refer to Wiring Repairs and Connector Repairs in Wiring Systems. Did you complete the repair? | -- | Go to Step 24 | -- |
20 | Repair the open in the rear sunshade control module ground circuit. Refer to Wiring Repairs and Connector Repairs in Wiring Systems. Did you complete the repair? | -- | Go to Step 24 | -- |
21 | Repair the open in the battery positive voltage circuit. Refer to Wiring Repairs and Connector Repairs in Wiring Systems. Did you complete the repair? | -- | Go to Step 24 | -- |
22 | Replace the rear sunshade switch. Refer to Sunroof Switch Replacement . Did you complete the replacement? | -- | Go to Step 24 | -- |
23 | Replace the rear sunshade control module. Refer to Control Module References in Computer/Integrating Systems for replacement, setup, and programming . Did you complete the replacement? | -- | Go to Step 24 | -- |
24 | Operate the system in order to verify the repair. Did you find and correct the condition? | -- | System OK | Go to Step 2 |
