Question about 2000 Jeep Grand Cherokee
You should check power to the sunroof motor. See if it is getting power. If it is, then the motor is shot, If not, then the problem may be in fuse, wiring, or relay
Posted on Jul 02, 2009
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Posted on Jan 02, 2017
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The control modules can communicate via the serial data link.
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The ability of the control modules to communicate through the serial data circuit
The identification of any stored DTCs and their status
The use of the Diagnostic System Check will identify the correct procedure for diagnosing the system and where the procedure is located.
When no DTCs ( diagnostic trouble codes ) are present, begin symptom diagnosis by reviewing the Sunroof Description and Operation . Reviewing the Description and Operation information will help you determine the correct symptom diagnostic procedure when a malfunction exists. Reviewing the Description and Operation information will also help you determine if the condition described by the customer is normal operation. Refer to Symptoms - Roof in order to identify the correct procedure for diagnosing the system and where the procedure is located.
Important: If the suspected cause of an inoperative sunroof is a power interruption to the sunroof module, the sunroof must be re-initialized. Refer to Sunroof Motor/Actuator Synchronization .
Important: The following must be completed before using the symptom tables.
The control module(s) can communicate via the serial data link.
Inspect the easily accessible or visible system components for obvious damage or conditions which could cause the symptom.
Faulty electrical connections or wiring may be the cause of intermittent conditions. Refer to Testing for Intermittent Conditions and Poor Connections in Wiring Systems.
Refer to a symptom diagnostic procedure from the following list in order to diagnose the symptom:
Power Sunroof Inoperative
Retained Accessory Power (RAP) On After Timeout in Retained Accessory Power, if the power sunroof should operate longer than 20 minutes after the ignition has been turned OFF
This information is right out of GMC service repair manual !
Sunroof Motor/Actuator Synchronization
Synchronization will be necessary anytime the sunroof module battery positive voltage circuit is interrupted. The sunroof module will be synchronized when the controller learns the full vent position. The sunroof system will ignore any open request until the system has been synchronized.
To synchronize the sunroof:
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