Diagnostic Test

TEST FOR INTERMITTENT CONDITION
1. Turn the ignition on.
2. Using the scan tool, record and erase DTCs.
3. Press and release the Sunroof Switch in all positions several times.
4. Wait 30 seconds.
5. Using the scan tool, read DTCs.
  Does the scan tool display B1841-SUNROOF OPEN SWITCH INPUT CIRCUIT HIGH?
  
  Yes
  - Go to step 2
  No
  - The conditions that caused this code to set are not present at this time. Check the switch for any binding conditions and using the SYSTEM WIRING DIAGRAMS as a guide, inspect the wiring and connectors.
SUNROOF SWITCH SHORTED

Fig 1: Checking Sunroof Switch Shorted
Courtesy of CHRYSLER LLC
1. Using the scan tool, erase DTCs.
2. Turn the ignition off.
3. Disconnect the Sunroof Switch connector.
4. Turn the ignition on and wait 30 seconds.
5. Using the scan tool, read DTCs.
  Does the scan tool display B1841-SUNROOF OPEN SWITCH INPUT CIRCUIT HIGH?
  
  Yes
  - Go to step 3
  No
  - Replace the Sunroof Switch.
  - Perform the BODY VERIFICATION TEST. Refer to DTC-Based Diagnostics/MODULE, Front Control (FCM) - Standard Procedure .
(Q3) SUNROOF OPEN SWITCH SENSE CIRCUIT SHORTED TO VOLTAGE

Fig 2: Checking Sunroof Open Switch Sense Circuit For Short To Voltage
Courtesy of CHRYSLER LLC

NOTE: To further diagnose the sunroof, it is necessary to lower or remove the headliner.
1. Turn the ignition off.
2. Lower the headliner to gain access to the Sunroof Motor/Module connector.
3. Disconnect the Sunroof Motor/Module connector.
  NOTE: Make sure the A-Pillar connector is connected before proceeding.
4. Turn the ignition on.
5. Measure the voltage between the (Q3) Sunroof Open Switch Sense circuit and Ground.
  Is the voltage above 0.4 of a Volt?
  
  Yes
  - Repair the (Q3) Sunroof Open Switch Sense circuit for a short to voltage.
  - Perform the BODY VERIFICATION TEST. Refer to DTC-Based Diagnostics/MODULE, Front Control (FCM) - Standard Procedure .
  No
  - Go to step 4
(Q3) SUNROOF OPEN SWITCH SENSE CIRCUIT SHORTED TO THE (Q6) SUNROOF SWITCH SUPPLY CIRCUIT

Fig 3: Checking Sunroof Open Switch Sense Circuit For Short To Sunroof Switch Supply Circuit
Courtesy of CHRYSLER LLC
1. Turn the ignition off.
2. Disconnect the A-Pillar connector.
3. Measure the resistance between the (Q3) Sunroof Open Switch Sense circuit and the (Q6) Sunroof Switch Supply circuit in the Sunroof Motor/Module connector.
  Is the resistance below 1000.0 Ohms?
  
  Yes
  - Repair the (Q3) Sunroof Open Switch Sense circuit for a short to the (Q6) Sunroof Switch Supply circuit.
  - Perform the BODY VERIFICATION TEST. Refer to DTC-Based Diagnostics/MODULE, Front Control (FCM) - Standard Procedure .
  No
  - Replace the Sunroof Motor/Module.
  - Perform the Motor/Module Initialization procedure. Refer to Electrical - Power Systems/Power Top/MOTOR, Sunroof - Standard Procedure .
  - Perform the BODY VERIFICATION TEST. Refer to DTC-Based Diagnostics/MODULE, Front Control (FCM) - Standard Procedure .