Test Description
The numbers below refer to the step numbers on the diagnostic table.
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This step will test for an intermittent condition when testing if the sunroof will slide to the vent position stopping, due to a soft stop. If the sunroof operates properly to the full vent position, then inspect the sunroof limit switch LS1 for a stuck switch causing an intermittent short to ground, or inspect the sunroof limit switch LS2 for a poor connection or a faulty switch causing an open.
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Testing for a short to ground in the LS1 limit switch circuit or a stuck limit switch closed.
Step | Action | Value(s) | Yes | No |
|---|---|---|---|---|
Schematic Reference: Sunroof Schematics DEFINITION: Sunroof will slide to vent position, but it will not stop at the soft stop (full vent) position. As the glass slides past the soft stop vent position the glass tends to shift out of alignment. | ||||
1 | Did you perform the Diagnostic System Check - Power Sunroof? | -- | Go to Step 2 | |
Does the sunroof module respond to the switch being pressed by clicking noises with each press of the switch? | -- | Go to Step 3 | Go to Testing for Intermittent Conditions and Poor Connections in Wiring Systems | |
3 | Measure the reference voltage between the limit switch LS1 circuit at the position encoder system (PES) module connector to a good ground. Does the voltage measure near the specified value? | 5 V | Go to Step 4 | Go to Step 9 |
4 | Measure the reference voltage between the limit switch LS2 circuit at the PES module connector to a good ground. Does the voltage measure near the specified value? | 0 V | Go to Step 5 | Go to Step 7 |
5 |
Does the voltage measure near the specified value? | 5 V | Go to Step 12 | Go to Step 6 |
6 | Test the limit switch LS2 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 13 | Go to Step 8 |
7 | Inspect for a poor connection at the PES module (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 13 | Go to Step 12 |
8 | 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 13 | Go to Step 12 |
9 |
Does the voltage measure near the specified value? | 5 V | Go to Step 11 | Go to Step 10 |
Test the limit switch LS1 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 13 | Go to Step 12 | |
11 | Replace the PES module. Refer to Sunroof Position Encoding System Switch Replacement . Did you complete the replacement? | -- | Go to Step 13 | -- |
12 | Replace the sunroof module. Refer to Power Sunroof Express Module Replacement . Did you complete the replacement? | -- | Go to Step 13 | -- |
13 |
Did you correct the condition? | -- | System OK | Go to Step 3 |
