Test Description
The numbers below refer to the step numbers on the diagnostic table.
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Using a jumper wire to jump between the sunroof limit switch vent signal circuit and the sunroof limit switch low reference circuit, will simulate that the glass is in a position other than full vent or full open position. This will allow any request from the sunroof switch to supply an output to drive the sunroof motor for testing the status of the limit switches.
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Checking the sunroof motor open and close output circuits, both should be at ground potential when idle.
Step | Action | Value(s) | Yes | No | ||||
|---|---|---|---|---|---|---|---|---|
Schematic Reference: Sunroof Schematics | ||||||||
1 | Did you review the Power Sunroof Description and Operation and perform the necessary inspections? | -- | 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 | Operate the driver side power window. Does the window operate normally? | -- | Go to Step 4 | Go to Step 31 | ||||
4 |
Does the system operate normally? | -- | Go to Step 32 | Go to Step 5 | ||||
5 |
Does the voltage measure near the specified value? | 4.5-5.5 V | Go to Step 6 | Go to Step 14 | ||||
6 | 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 7 | Go to Step 18 | ||||
7 | Measure the reference voltage between the sunroof switch close signal circuit and the 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 8 | Go to Step 22 | ||||
Did the sunroof glass slide as requested? | -- | Go to Step 9 | Go to Step 12 | |||||
9 | Test the sunroof limit switch range 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 44 | Go to Step 10 | ||||
10 | Test the sunroof limit switch soft stop signal 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 44 | Go to Step 11 | ||||
11 | 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 44 | Go to Step 36 | ||||
Does the test lamp illuminate? | -- | Go to Step 23 | Go to Step 13 | |||||
13 |
Does test lamp illuminate with each command? | -- | Go to Step 34 | Go to Step 26 | ||||
14 | Did the reference voltage of the sunroof switch open signal circuit measure near the specified value? | B+ | Go to Step 30 | Go to Step 15 | ||||
15 | 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 19 | Go to Step 16 | ||||
16 |
Does the voltage measure near the specified value? | B+ | Go to Step 17 | Go to Step 37 | ||||
17 | Measure between the sunroof ignition 3 voltage circuit and the ground circuit at the sunroof module harness connector. Does the voltage measure near the specified value? | B+ | Go to Step 33 | Go to Step 38 | ||||
18 | Did the reference voltage of the sunroof switch close signal circuit measure near the specified value? | B+ | Go to Step 21 | Go to Step 20 | ||||
19 | Test for an open, high resistance or short to ground in the sunroof switch open signal circuit. Refer to Circuit Testing and Wiring Repairs in Wiring Systems. Did you find and correct the condition? | -- | Go to Step 44 | Go to Step 33 | ||||
20 | Test for an open, high resistance or short to ground in the sunroof switch close signal circuit. Refer to Circuit Testing and Wiring Repairs in Wiring Systems. Did you find and correct the condition? | -- | Go to Step 44 | Go to Step 33 | ||||
21 | Test the sunroof switch close signal circuit for a short to B+. Refer to Circuit Testing and Wiring Repairs in Wiring Systems. Did you find and correct the condition? | -- | Go to Step 44 | Go to Step 42 | ||||
22 | Test the sunroof switch low reference circuit for an open or a high resistance. Refer to Circuit Testing and Wiring Repairs in Wiring Systems. Did you find and correct the condition? | -- | Go to Step 44 | Go to Step 33 | ||||
23 | Connect a test lamp between the sunroof motor open control circuit at the harness connector (module side) and a good ground. Does the test lamp illuminate? | -- | Go to Step 24 | Go to Step 25 | ||||
24 | Test the sunroof motor open control circuit for a short to B+. Refer to Circuit Testing and Wiring Repairs in Wiring Systems. Did you find and correct the condition? | -- | Go to Step 44 | Go to Step 42 | ||||
25 | Test the sunroof motor close control circuit for a short to B+. Refer to Circuit Testing and Wiring Repairs in Wiring Systems. Did you find and correct the condition? | -- | Go to Step 44 | Go to Step 42 | ||||
26 | Connect a test lamp between the sunroof motor open control circuit of the sunroof motor harness connector to B+. Does the test lamp illuminate? | -- | Go to Step 27 | Go to Step 29 | ||||
27 |
Did the test lamp illuminate? | -- | Go to Step 28 | Go to Step 42 | ||||
28 | 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 44 | Go to Step 33 | ||||
29 | 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 44 | Go to Step 33 | ||||
30 | Test the sunroof switch open signal circuit for a short to B+. Refer to Circuit Testing and Wiring Repairs in Wiring Systems. Did you find and correct the condition? | -- | Go to Step 44 | Go to Step 42 | ||||
31 | Test the ignition 3 voltage 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 44 | Go to Step 35 | ||||
32 | Inspect for a poor connection at the sunroof switch 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 44 | Go to Step 41 | ||||
33 | Inspect for a poor connection at 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 44 | Go to Step 42 | ||||
34 | Inspect for poor connections at 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 44 | Go to Step 43 | ||||
35 | Inspect for poor connections at the PWR WDO CB circuit breaker. 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 44 | Go to Step 39 | ||||
36 | Inspect for poor connections at the limit 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 44 | Go to Step 40 | ||||
37 | Repair an open or a high resistance in the sunroof ignition 3 voltage circuit. Refer to Wiring Repairs in Wiring Systems. Did you complete the repair? | -- | Go to Step 44 | -- | ||||
38 | Repair the ground circuit of the sunroof module for an open or high resistance. Refer to Circuit Testing and Wiring Repairs in Wiring Systems. Did you complete the repair? | -- | Go to Step 44 | -- | ||||
39 | Replace the circuit breaker. Did you complete the repair? | -- | Go to Step 44 | -- | ||||
40 | Replace the sunroof limit switch. Refer to Sunroof Actuator Replacement . Did you complete the repair? | -- | Go to Step 44 | -- | ||||
41 | Replace the sunroof switch. Refer to Sunroof Switch Replacement . Did you complete the replacement? | -- | Go to Step 44 | -- | ||||
42 | Replace the sunroof module. Refer to Power Sunroof Express Module Replacement . Did you complete the replacement? | -- | Go to Step 44 | -- | ||||
43 | Replace the sunroof actuator. Refer to Sunroof Actuator Replacement . Did you complete the replacement? | -- | Go to Step 44 | -- | ||||
44 |
Did you correct the condition? | -- | System OK | Go to Step 3 | ||||
