Diagnostic Test

WARNING: This page is about a different car, the 2013 RAM 1500. However, it is still accessible from the selected car via links, so may be relevant.

TEST FOR INTERMITTENT CONDITION
NOTE:
Make sure the battery is fully charged before proceeding.
1. Turn the ignition on.
2. With the scan tool, record and erase DTCs.
3. Try to operate the Front Windows up and down several times.
4. Wait 30 seconds.
5. With the scan tool, read the active DTCs.
  Does the scan tool display; U113D-00-LOST COMMUNICATION WITH MASTER POWER WINDOW SWITCH?
  
  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 poor pin fit.
  - Perform the BODY VERIFICATION TEST. Refer to STANDARD PROCEDURE .
(Q291) DOOR MODULE FEED TO DOOR SWITCH CIRCUIT OPEN
1. With the scan tool, erase the DTCs.
2. Turn the ignition off.
3. Disconnect the Driver Window Switch harness connector.
4. Turn the ignition on.
5. Using a 12-volt test light connected to Ground, check the (Q291) Door Module Feed To Window Switch circuit in the Driver Window Switch harness connector.
  Does the test light illuminate brightly?
  
  Yes
  - Go To 3
  No
  - Go To 9
CHECK THE LIN BUS CIRCUIT
1. Measure the voltage between the (D903) Driver Door LIN Bus circuit and the (D512) Driver Door LIN Bus Return circuit in the Driver Window/Door Lock Switch C1 connector.
  Is the voltage above 8.0 volts?
  
  Yes
  - Go To 4
  No
  - Go To 5
(D903) DRIVER DOOR LIN BUS CIRCUIT SHORT TO VOLTAGE

Fig 1: Checking LIN BUS Circuit For A Short To Voltage
Courtesy of CHRYSLER GROUP, LLC
1. Turn the ignition off.
2. Disconnect the Driver Door Module C5 harness connector.
3. Turn the ignition on.
4. Measure the voltage between Ground and the (D903) Driver Door LIN Bus circuit.
  Is there any voltage present?
  
  Yes
  - Repair the (D903) Driver Door LIN Bus circuit for a short to voltage.
  - Perform the BODY VERIFICATION TEST. Refer to STANDARD PROCEDURE .
  No
  - Replace the Driver Window Switch. Refer to SWITCH, POWER WINDOW, REMOVAL .
  - Perform the BODY VERIFICATION TEST. Refer to STANDARD PROCEDURE .
(D512) DRIVER DOOR LIN BUS RETURN CIRCUIT OPEN
1. Using a 12-volt test light connected to 12-volts, check the (D512) Driver Door LIN Bus Return circuit in the Driver Window Switch harness connector.
  Does the test light illuminate brightly?
  
  Yes
  - Go To 6
  No
  - Repair the (D512) Driver Door LIN Bus Return circuit for an open.
  - Perform the BODY VERIFICATION TEST. Refer to STANDARD PROCEDURE .
(D903) DRIVER DOOR LIN BUS CIRCUIT SHORTED TO VOLTAGE

Fig 2: Checking Driver Door Lin Bus Circuit For Short To Voltage
Courtesy of CHRYSLER GROUP, LLC
1. Turn the ignition on.
2. Measure the voltage between Ground and the (D903) Driver Door LIN Bus circuit in the Door Module C5 harness connector.
  Is there any voltage present?
  
  Yes
  - Repair the short to voltage in the (D903) LIN Bus circuit.
  - Perform the BODY VERIFICATION TEST. Refer to STANDARD PROCEDURE .
  No
  - Go To 7
(D903) DRIVER DOOR LIN BUS CIRCUIT SHORTED TO GROUND
2. Measure the resistance between Ground and the (D903) Driver Door LIN Bus circuit in the Door Module C5 harness connector.
  Is the resistance below 10K Ohms?
  
  Yes
  - Repair the short to the ground in the (D903) Driver Door LIN Bus circuit.
  - Perform the BODY VERIFICATION TEST. Refer to STANDARD PROCEDURE .
  No
  - Go To 8
(D903) DRIVER DOOR LIN BUS CIRCUIT OPEN
1. Measure the resistance of the (D903) Driver Door LIN Bus circuit between the Door Module C5 harness connector and the Driver Window Switch C1 harness connector.
  Is the resistance below 2.0 Ohms?
  
  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
  - Repair the (D903) Driver Door LIN Bus circuit for an open.
  - Perform the BODY VERIFICATION TEST. Refer to STANDARD PROCEDURE .
(Q291) DOOR MODULE FEED TO DOOR SWITCH WIRE OPEN
1. Turn the ignition off.
2. Disconnect the Driver Window Switch C1 connector.
3. Measure the resistance of the (Q291) Door Module Feed To Door Switch circuit between the Door Module C5 harness connector and the Driver Window Switch C1 harness connector.
  Is the resistance below 2.0 Ohms?
  
  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
  - Repair the (Q291) Door Module Feed To Door Switch circuit for an open.
  - Perform the BODY VERIFICATION TEST. Refer to STANDARD PROCEDURE .