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 ZRX/XTREME
Diagnostic Aids
If the power sunroof system fuse is open and a short to ground in the accessory voltage circuit is not detected, the fault could be a short to ground in one of the power sunroof control circuits. This would open the power sunroof system fuse when the sunroof switch is pressed.
Test Description
The numbers below refer to the step numbers on the diagnostic table.
Step | Action | Yes | No |
|---|---|---|---|
Schematic Reference: Sunroof Schematics Connector End View Reference: Power Roof Systems Connector End Views | |||
1 | Did you review the Power Roof Description and Operation? | Go to Step 2 | Go to Symptoms - Roof |
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 test lamp illuminate? | Go to Step 4 | Go to Step 5 |
4 | Connect a test lamp between the accessory voltage circuit and the ground circuit of the sunroof switch harness connector. Does the test lamp illuminate? | Go to Step 7 | Go to Step 13 |
Test the accessory voltage circuit of the sunroof switch 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 17 | Go to Step 6 | |
6 | Probe each of the sunroof motor control circuits of the sunroof switch harness connector with a test lamp that is connected to battery positive voltage. Did the test lamp illuminate at any of the sunroof motor control circuits? | Go to Step 10 | Go to Step 14 |
7 |
Did the test lamp illuminate? | Go to Step 8 | Go to Step 11 |
8 |
Does the test lamp illuminate? | Go to Step 9 | Go to Step 11 |
9 |
Does the test lamp illuminate? | Go to Step 12 | Go to Step 14 |
10 | Repair the short to ground in the sunroof motor/actuator control circuit(s). Refer to Wiring Repairs in Wiring Systems. Did you complete the repair? | Go to Step 17 | Go to Step 12 |
11 | Repair the open in the sunroof motor control circuit. Refer to Wiring Repairs in Wiring Systems. Did you complete the repair? | Go to Step 17 | Go to Step 12 |
12 | Inspect for poor connections at the harness connector of the sunroof actuator 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 17 | Go to Step 16 |
13 | Repair the open in the sunroof switch ground circuit. Refer to Wiring Repairs in Wiring Systems. Did you complete the repair? | Go to Step 17 | Go to Step 14 |
14 | 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 17 | Go to Step 15 |
15 | Replace the sunroof switch. Refer to Sunroof Switch Replacement . Did you complete the replacement? | Go to Step 17 | -- |
16 |
Important: Perform the sunroof motor synchronization procedure. Refer to Sunroof Motor/Actuator Synchronization . Replace the sunroof actuator motor. Refer to Sunroof Motor/Actuator Replacement . Did you complete the replacement? | Go to Step 17 | -- |
17 |
Did you correct the condition? | System OK | Go to Step 3 |
