Diagnostic Test

TEST FOR INTERMITTENT CONDITION
1. Turn the ignition on.
2. With the scan tool, record and erase the DTCs.
3. Try to operate the driver window up and down several times.
4. Wait 30 seconds.
5. With the scan tool, read the active DTCs.
  Does the scan tool display B1856-DRIVER WINDOW MOTOR CONTROL CIRCUIT OPEN as active?
  
  Yes
  - Go To 2.
  No
  - Test complete, the condition or conditions that originally set this DTC are not present at this time. Using the wiring diagrams as a guide, check all related splices and connectors for signs of water intrusion, corrosion, pushed out or bent terminals and correct pin tension.
  - Perform the BODY VERIFICATION TEST. Refer to BODY VERIFICATION TEST .
WINDOW MOTOR OR CIRCUIT OPEN

Fig 1: Checking Window Motor Or Circuit Open
Courtesy of CHRYSLER LLC
1. Turn the ignition off.
2. Disconnect the Driver Window Motor connector.
3. Connect a test light between the (Q11) Driver Window Driver (Up) circuit and the (Q21) Driver Window Driver (Down) circuit
4. Turn the ignition on.
5. Trip the driver door latch to the closed position.
6. Operate the driver window switch up and down several times while observing the test light.
  Does the test light illuminate brightly when the switch is pressed in both directions? With the express up window, the test light may only flash momentarily.
  
  Yes
  - Replace the Driver Window Motor (regulator) in accordances with the Service Information.
  - Perform the BODY VERIFICATION TEST. Refer to BODY VERIFICATION TEST .
  No
  - Go To 3.
(Q21) DRIVER WINDOW DRIVER (DOWN) CIRCUIT OPEN

Fig 2: Checking Driver Window Driver (Down) Circuit Open
Courtesy of CHRYSLER LLC
1. Turn the ignition off.
2. Disconnect the Driver Door Module C4 connector.
3. Measure the resistance of the (Q21) Driver Window Driver (Down) circuit between the C4 module connector and the motor connector.
  Is the resistance below 2.0 Ohms?
  
  Yes
  - Go To 4.
  No
  - Repair the open in the (Q21) Driver Window Driver (Down) circuit.
  - Perform the BODY VERIFICATION TEST. Refer to BODY VERIFICATION TEST .
(Q11) DRIVER WINDOW DRIVER (UP) CIRCUIT OPEN

Fig 3: Checking Driver Window Driver (Up) Circuit Open
Courtesy of CHRYSLER LLC
1. Measure the resistance of the (Q11) Driver Window Driver (Up) circuit between the C4 module connector and the motor connector.
  Is the resistance below 2.0 Ohms?
  
  Yes
  - Replace the Driver Door Module in accordance with the Service Information.
  - Perform the BODY VERIFICATION TEST. Refer to BODY VERIFICATION TEST .
  No
  - Repair the open in the (Q11) Driver Window Driver (Up) circuit.
  - Perform the BODY VERIFICATION TEST. Refer to BODY VERIFICATION TEST .