Test Description
The numbers below refer to the step numbers on the diagnostic table.
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Using a jumper wire to jumper the sunroof limit switch soft stop signal circuit to 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 |
Does the voltage measure near the specified value? | 4.5-5.5 V | Go to Step 4 | Go to Step 12 | ||||
4 | 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 5 | Go to Step 20 | ||||
5 | 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 6 | Go to Step 24 | ||||
6 |
Does the system operate normally? | -- | Go to Step 34 | Go to Step 7 | ||||
Did the sunroof glass slide as requested? | -- | Go to Step 8 | Go to Step 10 | |||||
8 | 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 42 | Go to Step 9 | ||||
9 | 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 42 | Go to Step 38 | ||||
Does the test lamp illuminate? | -- | Go to Step 25 | Go to Step 11 | |||||
11 |
Does test lamp illuminate with each command? | -- | Go to Step 36 | Go to Step 28 | ||||
12 | Did the reference voltage of the sunroof switch open signal circuit measure near the specified value? | B+ | Go to Step 19 | Go to Step 13 | ||||
13 | 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 21 | Go to Step 14 | ||||
14 |
Does the voltage measure near the specified value? | B+ | Go to Step 30 | Go to Step 15 | ||||
15 | Test the sunroof ignition 3 voltage circuit for an open, high resistance or short to ground. Refer to Circuit Testing and Wiring Repairs in Wiring Systems. Did you find and correct the condition? | -- | Go to Step 42 | Go to Step 16 | ||||
16 |
Does the voltage measure near the specified value? | B+ | Go to Step 17 | Go to Step 40 | ||||
17 |
Do you hear a clicking noise from the sunroof control module with each press of the sunroof switch? | -- | Go to Step 41 | Go to Step 18 | ||||
18 |
Did you find and correct the condition? | -- | Go to Step 42 | Go to Step 40 | ||||
19 |
Does the voltage measure near the specified value? | B+ | Go to Step 32 | Go to Step 37 | ||||
20 | Did the reference voltage of the sunroof switch close signal circuit measure near the specified value? | B+ | Go to Step 23 | Go to Step 22 | ||||
21 | 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 42 | Go to Step 35 | ||||
22 | 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 42 | Go to Step 35 | ||||
23 | 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 42 | Go to Step 40 | ||||
24 | 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 42 | Go to Step 35 | ||||
25 | Connect a test lamp between the sunroof motor open circuit at the harness connector, module side, and a good ground. Does the test lamp illuminate? | -- | Go to Step 26 | Go to Step 27 | ||||
26 | Test the sunroof motor open 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 42 | Go to Step 40 | ||||
27 | Test the sunroof motor close 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 42 | Go to Step 40 | ||||
28 | Connect a test lamp between the sunroof motor open circuit of the sunroof motor harness connector to B+. Does the test lamp illuminate? | -- | Go to Step 29 | Go to Step 31 | ||||
29 |
Did the test lamp illuminate? | -- | Go to Step 30 | Go to Step 35 | ||||
30 | Test the sunroof motor close 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 42 | Go to Step 35 | ||||
31 | Test the sunroof motor open 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 42 | Go to Step 35 | ||||
32 | 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 42 | Go to Step 33 | ||||
33 | 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 42 | Go to Step 40 | ||||
34 | Inspect for a poor connection 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 42 | Go to Step 39 | ||||
35 | 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 42 | Go to Step 40 | ||||
36 | 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 42 | Go to Step 41 | ||||
37 | Repair the ground circuit of the sunroof control 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 42 | -- | ||||
38 | Replace the sunroof opening position switch. Refer to Switch Replacement-Sunroof Position Encoding System. Did you complete the repair? | -- | Go to Step 42 | -- | ||||
39 | Replace the sunroof switch. Refer to Sunroof Switch Replacement . Did you complete the replacement? | -- | Go to Step 42 | -- | ||||
40 | Replace the sunroof module. Refer to Power Sunroof Express Module Replacement . Did you complete the replacement? | -- | Go to Step 42 | -- | ||||
41 | Replace the sunroof motor. Refer to Sunroof Actuator Replacement . Did you complete the replacement? | -- | Go to Step 42 | -- | ||||
42 |
Did you correct the condition? | -- | System OK | Go to Step 3 | ||||
