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.

CHECK FOR AN ACTIVE DTC
1. Turn the ignition on.
2. With the scan tool, read DTCs.
  Does the scan tool display this DTC 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 STANDARD PROCEDURE .
CHECK THE RUN/ACC 1 RELAY FOR CORRECT OPERATION
1. Turn the ignition off.
2. Remove the Run/Acc 1 Relay and substitute it with a known good relay.
3. With the scan tool, read DTCs.
  Does the scan tool display this DTC as active?
  
  Yes
  - Go To 3
  No
  - Replace the Run/Acc 1 Relay.
  - Perform the BODY VERIFICATION TEST. Refer to STANDARD PROCEDURE .
CHECK THE (P305) ACCESSORY DELAY RELAY CONTROL CIRCUIT FOR A SHORT TO VOLTAGE
1. Turn the ignition off.
2. Remove the Run/Acc 1 Relay.
3. Using a 12-volt test light connected to ground, check the (P305) Accessory Delay Relay Control circuit.
  Does the test light illuminate brightly?
  
  Yes
  - Repair the short to voltage in the (P305) Accessory Delay Relay Control circuit.
  - Perform the BODY VERIFICATION TEST. Refer to STANDARD PROCEDURE .
  No
  - Go To 4
CHECK THE (P305) ACCESSORY DELAY RELAY CONTROL CIRCUIT FOR AN OPEN
1. Disconnect the BCM A harness connector.
2. Measure the resistance of the (P305) Accessory Delay Relay Control circuit between the Power Distribution Center (PDC) and the BCM E harness connector.
  Is the resistance 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 (P305) Accessory Delay Relay Control circuit.
  - Perform the BODY VERIFICATION TEST. Refer to STANDARD PROCEDURE .