B1849

B1849-SUNROOF MOTOR CONTROL CIRCUIT/PERFORMANCE

WHEN MONITORED
Whenever the Sunroof motor/module is in motion.

SET CONDITION
Whenever the sunroof motor/module is attempting to move the sunroof in response to the input switches (or in response to an obstacle), and it doesn't appear to be responding correctly. This code is usually set when there is some type of binding in the sunroof mechanism.

POSSIBLE CAUSES
- Sunroof motor/module
- Mechanical binding, sticking or cables out of calibration

DIAGNOSTIC TEST

1. TEST FOR INTERMITTENT CONDITION




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.

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

YES: Go To 2
NO: 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.
- Any time the Sunroof Motor is removed, it is necessary to perform the Position Calibration when the motor is re-installed.

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.

Q: Did the motor operate smoothly and powerful?

YES: Repair or replace the sunroof mechanism as necessary. Perform BODY VERIFICATION TEST - VER 1. Body Verification Test
NO: Replace the Sunroof Motor Module. Perform the Sunroof Position Calibration. Perform BODY VERIFICATION TEST - VER 1. Body Verification Test