Diagnostic Test

WARNING: This page is about a different car, the 2013 RAM 3500 HD and 2013 RAM 2500 HD. However, it is still accessible from the selected car via links, so may be relevant.

TEST FOR INTERMITTENT CONDITION
NOTE:
If the scan tool is unable to identify the vehicle, a CAN C bus concern may be present. and perform the CAN C BUS NO RESPONSE diagnostic procedure. Refer to DIAGNOSIS AND TESTING .

NOTE:
Check for any TSB(s) related to the condition. If a TSB applies, perform the procedure outlined in the TSB before continuing.
1. Turn the ignition on.
  NOTE:
  Make sure the battery voltage is between 10.0 and 16.0 volts.
2. With the scan tool, read the module status.
  NOTE:
  Check the BCM for any active CAN hardware DTCs, perform DTC before proceeding.
  
  Does the scan tool indicate that the module is active on the bus?
  
  Yes
  - The no response condition is not present at this time. Using the wiring diagram/schematic as a guide, inspect the wiring for chafed, pierced, pinched, and partially broken wires and the wiring harness connectors for broken, bent, pushed out, and corroded terminals.
  - Perform the BODY VERIFICATION TEST. Refer to STANDARD PROCEDURE .
  No
  - Go To 2
CHECK THE (A903), (A904), (A905) AND (A906) FUSED B(+) CIRCUITS FOR AN OPEN OR SHORT CIRCUIT

Fig 1: Checking Fused B(+) Circuits For An Open Or Short Circuit
Courtesy of CHRYSLER GROUP, LLC
1. Turn the ignition off.
2. Disconnect the BCM B and C harness connectors.
3. Using a 12-volt test light connected to ground, check each Fused B(+) circuit.
  Does the test light illuminate brightly for each circuit?
  
  Yes
  - Go To 3
  No
  - Repair the open or short in the (A903), (A904), (A905) or (A906) Fused B(+) circuit.
  - Perform the BODY VERIFICATION TEST. Refer to STANDARD PROCEDURE .
CHECK THE (Z905) GROUND CIRCUIT FOR AN OPEN

Fig 2: Checking Ground Circuit For High Resistance
Courtesy of CHRYSLER GROUP, LLC
1. Using a 12-volt test light connected to 12-volts, check the (Z905) Ground circuits.
  Does the test light illuminate brightly for each circuit?
  
  Yes
  - Go To 4
  No
  - Repair the open in the (Z905) Ground circuit.
  - Perform the BODY VERIFICATION TEST. Refer to STANDARD PROCEDURE .
CHECK THE (D45) AND (D46) CAN C BUS (+) CIRCUITS FOR AN OPEN
1. Turn the ignition off.
2. Disconnect the CAN C IP Star Connector C4 harness connector.
3. Measure the resistance of the (D45) CAN C Bus (+) circuit between the CAN C IP Star Connector C4 harness connector and the BCM E harness connector.
4. Measure the resistance of the (D46) CAN C Bus (-) circuit between the CAN C IP Star Connector C4 harness connector and the BCM E harness connector.
  Are the resistances below 5.0 Ohms?
  
  Yes
  - Replace the Body Control Module (BCM) in accordance with the Service Information. Refer to MODULE, BODY CONTROL, REMOVAL .
  - Perform the BODY VERIFICATION TEST. Refer to STANDARD PROCEDURE .
  No
  - Repair the open in the (D45) CAN C Bus (+) or (D46) CAN C Bus (-) circuit.
  - Perform the BODY VERIFICATION TEST. Refer to STANDARD PROCEDURE .