Diagnostic Test

WARNING: This page is about a different car, the 2012 RAM Pickup and 2012 RAM Cab & Chassis. 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 DTC's
3. Operate the Front Window switches up and down several times.
4. Wait 30 seconds.
5. With the scan tool, read the active DTC's.
  Does the scan tool display U113D-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 correct pin tension.
  - Perform the BODY VERIFICATION TEST. Refer to BODY VERIFICATION TEST .
(A855) FUSED B(+) CIRCUIT FOR AN OPEN

Fig 1: Checking Fused B(+) Circuit For An Open
Courtesy of CHRYSLER GROUP, LLC

NOTE:
Make sure Fuse M25 in the TIPM is good before proceeding.
1. With the scan tool, erase DTC's.
2. Turn the ignition off.
3. Disconnect the Driver Window/Door Lock Switch C1 harness connector.
4. Turn the ignition on.
5. Using a 12-volt test light connected to Ground, check the (A855) Fused B(+) circuit.
  Does the test light illuminate brightly?
  
  Yes
  - Go To 3.
  No
  - Repair the open in the (A855) Fused B(+) circuit. If the fuse is open, make sure to check for a short to ground.
  - Perform the BODY VERIFICATION TEST. Refer to BODY VERIFICATION TEST .
CHECK THE LIN BUS CIRCUIT

Fig 2: Measuring Voltage Of Lin Bus Circuit
Courtesy of CHRYSLER GROUP, LLC
1. Measure the voltage between the (D500) LIN Bus circuit and the (D501) LIN Bus Return circuit.
  Is the voltage below 7.0 Volts?
  
  Yes
  - Go To 5.
  No
  - Go To 4.
(D500) LIN BUS CIRCUIT FOR A SHORT TO VOLTAGE

Fig 3: 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 (D500) LIN Bus circuit.
  Is there any voltage present?
  
  Yes
  - Repair the short to voltage in the (D500) LIN Bus circuit.
  - Perform the BODY VERIFICATION TEST. Refer to BODY VERIFICATION TEST .
  No
  - Replace the Driver Window/Door Lock Switch in accordance with the Service Information.
  - Perform the BODY VERIFICATION TEST. Refer to BODY VERIFICATION TEST .
(D501) LIN BUS RETURN CIRCUIT FOR AN OPEN

Fig 4: Checking Lin Bus Circuit For An Open
Courtesy of CHRYSLER GROUP, LLC
1. Using a 12-volt test light connected to 12-volts, check the (D501) LIN Bus Return circuit.
  Does the test light illuminate brightly?
  
  Yes
  - Go To 6.
  No
  - Repair the open in the (D501) LIN Bus Return circuit.
  - Perform the BODY VERIFICATION TEST. Refer to BODY VERIFICATION TEST .
(D500) LIN BUS CIRCUIT FOR A SHORT TO GROUND

Fig 5: Checking LIN BUS Circuit For A Short To Ground
Courtesy of CHRYSLER GROUP, LLC
1. Turn the ignition off.
2. Disconnect the Driver Door Module C5 harness connector.
3. Measure the resistance between ground and the (D500) LIN Bus circuit in the Driver Door Module C5 harness connector.
  Is the resistance below 10, 000 Ohms?
  
  Yes
  - Repair the short to ground in the (D500) LIN Bus circuit.
  - Perform the BODY VERIFICATION TEST. Refer to BODY VERIFICATION TEST .
  No
  - Go To 7.
(D500) LIN BUS CIRCUIT FOR AN OPEN

Fig 6: Checking Lin Bus Circuit For An Open
Courtesy of CHRYSLER GROUP, LLC
1. Measure the resistance of the (D500) LIN Bus circuit between the Door Module C5 harness connector and the Driver Window/Door Lock Switch C1 harness connector.
  Is the resistance above 2.0 Ohms?
  
  Yes
  - Repair the open in the (D500) LIN Bus circuit.
  - Perform the BODY VERIFICATION TEST. Refer to BODY VERIFICATION TEST .
  No
  - Replace the Driver Door Module in accordance with the Service Information.
  - Perform the BODY VERIFICATION TEST. Refer to BODY VERIFICATION TEST .