Grand Cherokee 4WD V8-4.7L Flex Fuel (2009)
Sunroof / Moonroof Motor: Component Tests and General Diagnostics
MOTOR/MODULE - SUNROOF
Any diagnosis of the power sunroof system should begin with the use of a scan tool and the proper Diagnostic Procedures Information. The scan tool can
provide confirmation that the Controller Area Network (CAN) Data Bus is functional, that all of the electronic modules are sending and receiving the
proper messages on the CAN Data Bus, and that the power sunroof motor is being sent the proper hard wired output by the sunroof switch.
Refer to the appropriate diagnostic information.
NOTE: If there is no sunroof movement when the "OPEN" or "CLOSED" button are pushed but the sunroof operates when the "VENT"
button is pushed and held the sunroof motor/module is out of calibration. Complete the sunroof position calibration procedure prior
to performing any sunroof diagnostics, See: Programming and Relearning .
The wire harness connectors for the sunroof motor/module are located above the vehicle headliner. Removal of the headliner may be necessary for
access to the connector and proper diagnosis of the motor/module, See: Interior Moulding / Trim/Headliner/Service and Repair/Headliner - Removal.
For complete circuit diagrams, refer to the appropriate wiring information. The wiring information includes wiring diagrams, proper wire and
connector repair procedures, details of wire harness routing and retention, connector pin-out information and location views for the various wire harness
connectors, splices and grounds.
1. Verify that all other power accessories are in proper operating condition. If not, a common electrical problem may exist.
2. Disconnect the sunroof motor/module connector directly at the motor/module (not at the headliner in-line connector). Connect a test light between
the harness connector pin 6 and a known good B+ circuit. The test light should illuminate brightly. If OK, go to 3. If not OK repair the ground
circuit as necessary.
3. Connect a test light between the harness connector pin 8 and a known good ground. The test light should illuminate brightly. If OK, go to 4. If not
OK repair the B+ circuit as necessary.
4. Using an ohmmeter check the sunroof switch feed circuit for continuity between the sunroof motor/module and sunroof switch. Continuity should
be present. If OK replace the inoperative motor/module, See: Service and Repair/Sunroof Motor - Removal. If not OK repair the sunroof switch
feed circuit as necessary.
