Diagnostic Test

WARNING: This page is about a different car, the 2005 Jeep Grand Cherokee. However, it is still accessible from the selected car via links, so may be relevant.

1) TEST FOR INTERMITTENT CONDITION

Fig 1: Scan Tool - Starscan
Courtesy of DAIMLERCHRYSLER CORP.

Turn the ignition on.

With the scan tool, record and erase DTC's

Operate the Sunroof Switch in all positions several times.

Wait 30 seconds.

With the scan tool, read DTC's.

Does the scan tool display B1849-SUNROOF MOTOR CONTROL CIRCUIT/PERFORMANCE (STALLED)?

Yes
1. Go To step 2).
No
1. The conditions that caused this code to set are not present at this time. Check for any binding or sticking conditions.
2) SUNROOF MOTOR
NOTE: To further diagnose the sunroof, it is necessary to lower or remove the headliner.

NOTE: Any time the Sunroof Motor is removed, it is necessary to perform the Position Calibration when the motor is re-installed. (Refer to ELECTRICAL/POWER TOP/MOTOR - STANDARD PROCEDURE)

Turn the ignition off.

Lower the headliner to gain access to the Sunroof Motor/Module.

Remove the Sunroof Motor/Module from the sunroof.

NOTE: Ensure the A-Pillar connector is connected before proceeding.

Turn the ignition on.

While holding the motor firmly in your hand, have an assistant press the sunroof switch Open and after the motor stops press Close (NOT VENT) several times and observe the motor operation.

Did the motor operate smoothly and powerful?

Yes
1. Repair or replace the sunroof mechanism as necessary in accordance with Service Information.
  Perform BODY VERIFICATION TEST - VER 1 . (Refer to ELECTRICAL/ELECTRONIC CONTROL MODULES - STANDARD PROCEDURE)
No
1. Replace the Sunroof Motor Module.
2. Perform the Sunroof Position Calibration. (Refer to ELECTRICAL/POWER TOP/MOTOR - STANDARD PROCEDURE)
  Perform BODY VERIFICATION TEST - VER 1 . (Refer to ELECTRICAL/ELECTRONIC CONTROL MODULES - STANDARD PROCEDURE)