Calibration & Timing
There is no adjustment available for a normally operating sunroof. This procedure is used to set sunroof motor/module to sunroof assembly timing.
Manually push the sunroof guide rail assembly to the full forward position until it is locked into position. This is verified by attempting to push the guide assembly rearward.
NOTEThe guide rail assembly will be raised above the U-frame assembly when in the lock position.
- Remove the sunroof glass.
Manually move the guide rail pivot inside the guide rail cam slot until it is centered between the etched timing marks on both rails.
Verify that the white marking is visible in the new motor/module timing window. If the mark is not visible, connect a power source to the motor/module and cycle the switch until the motor/module is in the closed position (white mark in window).
If the power top is completely inoperative, perform the following diagnostic steps:
- Check the B+ 40 amp fuse in the Integrated Power Module (IPM). If OK, go to Step No. 2. If not OK, repair the shorted circuit or component as required and replace the inoperative fuse.
- Check the Accessory delay 20 amp fuse in the IPM. If OK, go to Step No. 3. If not OK, repair the shorted circuit or component as required and replace the inoperative fuse.
- Partially remove the headliner to access the sunroof motor/module.
- Disconnect the motor/module electrical connector. Using a voltmeter, check for Battery voltage at the B+ terminal of the harness connector. If OK, go to Step No. 5. If not OK, repair the B+ circuit as necessary.
- With the ignition switch in the -RUN- position check for Battery voltage at the Accessory Relay Output terminal of the harness connector. If OK, go to Step No. 6. If not OK repair the Accessory Relay Output circuit as necessary.
- Using an ohmmeter test for continuity between the harness connector ground circuit and a known good ground. Continuity should be present. If OK go to Step No. 7. If not OK, repair the open ground circuit as necessary.
- Turn the ignition switch to the -OFF- position. Reconnect the motor/module electrical connector. With the ignition switch in the -RUN- position check for battery voltage on the -VENT-, -CLOSE- and -OPEN- circuits at the back side of the motor/module connector. If OK, go to Step No. 8. If not OK replace the motor/module assembly.
- Turn the ignition switch to the -OFF- position. Disconnect the motor/module and sunroof switch electrical connectors. Using an ohmmeter check for continuity on the -VENT-, -CLOSE- and -OPEN- circuits between the motor/module and sunroof switch. Continuity should be present. If OK, diagnose the sunroof switch. If not OK, repair the control circuits as necessary.
- Remove the overhead console.
- Disconnect the power sunroof switch wire harness connector.
- With the ignition key in the -RUN- position, check for battery voltage on the -OPEN-, -CLOSE- and -VENT- circuits of the sunroof switch harness connector. If OK, go to Step No. 4. If not OK, inspect the wiring harness and connectors between the motor/module and switch for damage and repair as necessary.
- With the ignition key in the -OFF- position check for continuity between the ground circuit of the sunroof switch harness connector and a known good ground. Continuity should be present. If OK, go to Step No. 5. If not OK, inspect the wiring harness and connector and repair the ground circuit as necessary.
Using an ohmmeter, test the continuity of the power sunroof switch in each switch position:
With sunroof switch off, there should be no continuity between pins
If OK, inspect the wiring harness and connectors for damage and repair as necessary. If not OK, replace the power sunroof switch.
- Move the glass panel to the fully closed position.
- Disconnect the battery negative cable.
- Remove the headliner.
- Disconnect the four drain tubes from sunroof housing.
- Disconnect the sunroof wire connector.
- Loosen the fasteners attaching sunroof assembly.
- With the aid of a helper, support the sunroof and remove the fasteners attaching the sunroof assembly to the roof panel.
- Remove the sunroof from vehicle.
Ensure that the U-nuts are in position in the roof bow.
- Raise sunroof module assembly and guide it carefully into position.
- While supporting the sunroof assembly, start the attaching screws. Tighten the attaching screws in sequence to 53 inch lbs. (6 Nm).
- Connect the sunroof wire connector.
- Connect the drain tubes to the sunroof.
- Connect the battery negative cable.
- Test sunroof operation, adjust the position of the glass panel as necessary.
- Install headliner.
- Remove the sunroof assembly.
- Remove the sunroof motor/module retaining bolts and remove the motor/module.
The sunroof motor/module must be timed with the sunroof assembly. Failure to do so will result in improper sunroof operation and possible leakage or damage to the assembly.
- Assure proper sunroof motor/module timing calibration before installation.
- Position the sunroof motor/module to the sunroof assembly and install the retaining bolts . Tighten the sunroof motor/module retaining bolts to 40 inch lbs. (4.2 Nm).
- Connect the timed sunroof assembly to a power source and assure proper operation before installing the sunroof assembly into the vehicle.
Install the sunroof assembly in the vehicle.
- Disconnect and isolate the battery negative cable.
- Separate the overhead console from the headliner, by carefully pulling down on the front portion, toward the windshield, to release the retaining clips.
- Release the sunroof switch retaining tab, disconnect the electrical connector and remove the switch from the overhead console.
- Position the sunroof switch against the overhead console and push the switch to properly seat in the retaining clip.
- Install the overhead console assembly.
- Connect the battery negative cable.