Diagnostic Test

WARNING: This page is about a different car, the 2014 RAM 3500 HD and 2014 RAM 2500 HD. However, it is still accessible from the selected car via links, so may be relevant.

CHECK FOR AN ACTIVE DTC
1. Turn the ignition on.
2. With the scan tool, create a Vehicle Scan Report and attach it to the repair order.
3. With the scan tool, read DDM DTCs.
  Is the DTC active?
  
  Yes
  - Go To 2
  No
  - Test complete, the conditions that caused this code to set is not present at this time.
  - Perform the BODY VERIFICATION TEST. Refer to STANDARD PROCEDURE .
CONFIRM WINDOW OPERATION
NOTE:
This step is being performed

only

when this DTC is active.
1. Run the window to the full up position and continue to hold the switch for an additional two seconds.
2. Run the window to the full down position and continue to hold the switch for an additional two seconds.
3. Again run the window to the full up position and continue to hold the switch for an additional two seconds.
4. Lower the window to the full down position then press and release the switch to the express up position.
  Did the window move to the full up position?
  
  Yes
  - Replace the Driver Door Module in accordance with the Service Information. Refer to MODULE, DOOR, REMOVAL .
  - Perform the BODY VERIFICATION TEST. Refer to STANDARD PROCEDURE .
  No
  - Go To 3
CHECKING THE (Q11) DRIVER WINDOW DRIVER UP CIRCUIT AND THE (Q21) DRIVER WINDOW DRIVER DOWN CIRCUIT FOR VOLTAGE
NOTE:
This step is being performed

only

when DTC B18BA-4B is ACTIVE.
1. Turn the ignition off.
2. Disconnect the Driver Window Motor harness connector.
3. Connect a 12-volt test light between the (Q11) Driver Window Driver Up circuit and the (Q21) Driver Window Driver Down circuit.
  NOTE:
  The test light must illuminate brightly. Compare the brightness to that of a direct connection to the battery.
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?
  
  NOTE:
  With the express up window, the test light will only flash momentarily each time the switch is activated.
  
  Yes
  - Replace the Driver Window Motor in accordance with the Service Information.
  - Perform the BODY VERIFICATION TEST. Refer to STANDARD PROCEDURE .
  No
  - Replace the Driver Door Module in accordance with the Service Information. Refer to MODULE, DOOR, REMOVAL .
  - Perform the BODY VERIFICATION TEST. Refer to STANDARD PROCEDURE .