Power Sunroof Inoperative Before VIN 209984
Test Description
The numbers below refer to the steps numbers on the diagnostic table.
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Using a jumper wire to simulate operation of the sunroof to determine if the switch is at fault.
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Disconnecting the sunroof opening position switch harness connector and shorting the sunroof limit switch LS1 circuit, the sunroof module thinks the glass is in the closed position, allowing any request from the sunroof switch to enable an output to the motor for testing.
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When the sunroof module is at rest the sunroof motor open control and close control circuits are at ground potential. This step is testing for an output to drive the motor, when the sunroof module should be idle.
Step | Action | Value(s) | Yes | No |
|---|---|---|---|---|
Schematic Reference: Sunroof Schematics DEFINITION: Sunroof inoperative, does not open, close, or vent and can be inoperative in any position. | ||||
1 | Did you perform A Diagnostic System Check - Power Sunroof? | -- | Go to Step 2 | |
2 | Operate the power sunroof. Does the system operate normally? | -- | Go to Testing for Intermittent Conditions and Poor Connections in Wiring Systems | Go to Step 3 |
3 |
Does the LF window operate? | -- | Go to Step 5 | Go to Step 4 |
4 | Operate the radio. Does the radio operate? | -- | Go to Step 30 | Go to Retained Accessory Power (RAP) Inoperative in Retained Accessory Power |
Does the sunroof operate normally? | -- | Go to Step 33 | Go to Step 6 | |
6 |
Does the voltage measure near the specified value? | 4.5-5.5 V | Go to Step 7 | Go to Step 17 |
7 | Measure the reference voltage of the sunroof switch close signal circuit at the sunroof switch harness connector to a good ground. Does the voltage measure near the specified value? | 4.5-5.5 V | Go to Step 8 | Go to Step 21 |
8 | Measure the reference voltage of the sunroof switch close signal circuit and sunroof switch low reference circuit at the sunroof switch harness connector. Does the voltage measure near the specified value? | 4.5-5.5 V | Go to Step 9 | Go to Step 22 |
9 |
Does the voltage measure near the specified value? | 4.5-5.5 V | Go to Step 10 | Go to Step 23 |
10 | Measure the reference voltage of the sunroof limit switch LS2 circuit at the sunroof opening position switch harness connector to a good ground. Does the voltage measure near the specified value? | 4.5-5.5 V | Go to Step 11 | Go to Step 24 |
11 | Measure the reference voltage of the sunroof limit switch LS3 circuit at the sunroof opening position switch harness connector to a good ground. Does the voltage measure near the specified value? | 4.5-5.5 V | Go to Step 12 | Go to Step 25 |
12 | Measure the reference voltage between the sunroof limit switch LS3 circuit and the sunroof limit switch low reference circuit at the sunroof opening position switch harness connector. Does the voltage measure near the specified value? | 4.5-5.5 V | Go to Step 13 | Go to Step 26 |
Does the sunroof glass slide as requested? | -- | Go to Step 35 | Go to Step 14 | |
Does the test lamp illuminate? | -- | Go to Step 44 | Go to Step 15 | |
15 |
Did the test lamp illuminate? | -- | Go to Step 16 | Go to Step 27 |
16 |
Did the test lamp illuminate? | -- | Go to Step 34 | Go to Step 44 |
17 | Measure the reference voltage of the sunroof switch close signal circuit at the sunroof switch harness connector to a good ground. Does the voltage measure near the specified value? | 4.5-5.5 V | Go to Step 18 | Go to Step 19 |
18 | Test the sunroof switch open signal circuit for an open, high resistance or a short to ground. Refer to Circuit Testing and Wiring Repairs in Wiring Systems. Did you find and correct the condition? | -- | Go to Step 45 | Go to Step 36 |
19 |
Does the voltage measure near the specified value? | B+ | Go to Step 20 | Go to Step 37 |
20 | Measure the voltage between the sunroof RAP fuse supply voltage circuit and the sunroof ground circuit at the sunroof module harness connector. Does the voltage measure near the specified value? | B+ | Go to Step 36 | Go to Step 38 |
21 | Test the sunroof switch close signal circuit for an open, high resistance or a short to ground. Refer to Circuit Testing and Wiring Repairs in Wiring Systems. Did you find and correct the condition? | -- | Go to Step 45 | Go to Step 36 |
22 | Test the sunroof switch low reference circuit 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 45 | Go to Step 36 |
23 | Test the sunroof limit switch LS1 circuit 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 45 | Go to Step 36 |
24 | Test the sunroof limit switch LS2 circuit 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 45 | Go to Step 36 |
25 | Test the sunroof limit switch LS3 circuit 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 45 | Go to Step 36 |
26 | Test the sunroof limit switch low reference circuit 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 45 | Go to Step 36 |
27 |
Did the test lamp illuminate? | -- | Go to Step 29 | Go to Step 28 |
28 | Test the sunroof motor open control circuit 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 45 | Go to Step 36 |
29 | Test the sunroof motor close control circuit 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 45 | Go to Step 36 |
30 |
Does the voltage measure near the specified value? | B+ | Go to Step 31 | Go to Step 39 |
31 | Test the sunroof RAP fuse supply voltage circuit for an open, high resistance or a short to ground. Refer to Circuit Testing and Wiring Repairs in Wiring Systems. Did you find and correct the condition? | -- | Go to Step 45 | Go to Step 32 |
32 | Inspect the POWER WINDOW circuit breaker for poor connections. 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 45 | Go to Step 40 |
33 | Inspect for poor connections at the sunroof switch and harness connector. 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 45 | Go to Step 41 |
34 | Inspect for poor connections at the sunroof motor and harness connector. 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 45 | Go to Step 42 |
35 | Inspect for poor connections at the sunroof opening position switch and harness connector. 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 45 | Go to Step 43 |
36 | Inspect for poor connections at the sunroof module and harness connector. 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 45 | Go to Step 44 |
37 | Repair an open or high resistance in the sunroof RAP fuse supply voltage circuit. Refer to Wiring Repairs in Wiring Systems. Did you find and correct the condition? | -- | Go to Step 45 | -- |
38 | Repair an open in the sunroof ground circuit. Refer to Wiring Repairs in Wiring Systems. Did you find and correct the condition? | -- | Go to Step 45 | -- |
39 | Repair an open in the RAP relay switch supply voltage circuit. Refer to Wiring Repairs in Wiring Systems. Did you find and correct the condition? | -- | Go to Step 45 | -- |
40 | Replace the circuit breaker. Did you complete the repair? | -- | Go to Step 45 | -- |
41 | Replace the sunroof switch. Refer to Sunroof Switch Replacement . Did you complete the repair? | -- | Go to Step 45 | -- |
42 | Replace the sunroof motor. Refer to Sunroof Motor/Actuator Replacement . Did you complete the repair? | -- | Go to Step 45 | -- |
43 | Replace sunroof opening position switch. Refer to Sunroof Opening Position Switch Replacement . Did you complete the repair? | -- | Go to Step 45 | -- |
44 | Replace sunroof module. Refer to Sunroof Control Module Replacement . Did you complete the repair? | -- | Go to Step 45 | -- |
45 |
Did you correct the condition? | -- | System OK | Go to Step 3 |
Power Sunroof Inoperative After VIN 209983
Diagnostic Aids
If voltage is not measured on the sunroof switch open signal or sunroof switch close signal circuits, the fault could be in the RAP supply voltage circuit, battery positive voltage circuit or sunroof motor ground circuit. If the sunroof motor is not being powered, neither will the sunroof switch signal circuits.
Test Description
The numbers below refer to the step numbers on the diagnostic table.
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This step is used to determine the correct diagnostic path. The path depends on if the sunroof is inoperative and in the open position, or if the sunroof is inoperative and in the closed position.
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This step tests the sunroof switch open switch.
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This step tests the sunroof 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 Power Sunroof Diagnostic System Check? | -- | Go to Step 2 | |
2 | Attempt to operate the sunroof through its full range of functions in order to verify that the power sunroof inoperative fault is present. Does the power sunroof system operate normally? | -- | Go to Testing for Intermittent Conditions and Poor Connections in Wiring Systems | Go to Step 3 |
Is the sunroof in the fully closed position? | -- | Go to Step 4 | Go to Step 7 | |
Did the sunroof open? | -- | Go to Step 17 | Go to Step 5 | |
5 |
Does the voltage measure near the specified value? | B+ | Go to Step 13 | Go to Step 6 |
6 | Measure the voltage from the sunroof switch open signal circuit of the sunroof switch harness connector to a good ground. Does the voltage measure near the specified value? | B+ | Go to Step 14 | Go to Step 10 |
Did the sunroof close? | -- | Go to Step 17 | Go to Step 8 | |
8 |
Does the voltage measure near the specified value? | B+ | Go to Step 15 | Go to Step 9 |
9 | Measure the voltage from the sunroof switch close signal circuit of the sunroof switch harness connector to a good ground. Does the voltage measure near the specified value? | B+ | Go to Step 14 | Go to Step 10 |
10 |
Does the voltage measure near the specified value? | B+ | Go to Step 11 | Go to Step 19 |
11 | Measure the voltage from the RAP supply voltage circuit of the sunroof motor harness connector to a good ground. Does the voltage measure near the specified value? | B+ | Go to Step 12 | Go to Symptoms - Retained Accessory Power in Retained Accessory Power |
12 |
Does the resistance measure less than or equal to the specified value? | 5 ohms | Go to Step 16 | Go to Step 20 |
13 | Test the sunroof switch close signal circuit 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 23 | Go to Step 18 |
14 | Test the sunroof switch low reference circuit for an open. Refer to Circuit Testing and Wiring Repairs in Wiring Systems. Did you find and correct the condition? | -- | Go to Step 23 | Go to Step 18 |
15 | Test the sunroof switch open signal circuit 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 23 | Go to Step 18 |
16 | Test the appropriate sunroof switch signal circuit for an open. Refer to Circuit Testing and Wiring Repairs in Wiring Systems. Did you find and correct the condition? | -- | Go to Step 23 | Go to Step 18 |
17 | 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 23 | Go to Step 21 |
18 | Inspect for poor connections at the harness connectors 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 23 | Go to Step 22 |
19 | Repair the short to ground or open in the sunroof motor battery positive voltage circuit. Refer to Wiring Repairs and Connector Repairs in Wiring Systems. Did you complete the repair? | -- | Go to Step 23 | -- |
20 | Repair the open in the sunroof motor ground circuit. Refer to Wiring Repairs and Connector Repairs in Wiring Systems. Did you complete the repair? | -- | Go to Step 23 | -- |
21 | Replace the sunroof switch. Refer to Sunroof Switch Replacement . Did you complete the replacement? | -- | Go to Step 23 | -- |
22 | Replace the sunroof motor. Refer to Sunroof Motor/Actuator Replacement . Did you complete the replacement? | -- | Go to Step 23 | -- |
23 | Operate the system in order to verify the repair. Did you find and correct the condition? | -- | System OK | Go to Step 2 |
