Diagnostic Test

WARNING: This page is about a different car, the 2019 RAM 3500 HD and 2019 RAM 2500 HD. However, it is still accessible from the selected car via links, so may be relevant.

CHECK FOR POOR CONNECTIONS AT THE BATTERIES
NOTE:
It can take up to 10 minutes for the PCM to power down after the ignition is turned off. Disconnecting the batteries during this time will cause this DTC to set.
1. Visually inspect the wiring at the battery for damaged wires, or corrosion.
  Are the connections tight and free of corrosion?
  
  Yes
  - Go To 2
  No
  - Repair the poor connections at the Batteries.
  - Perform the POWERTRAIN VERIFICATION TEST. Refer to POWERTRAIN VERIFICATION TEST .
CHECK FOR LOW BATTERY VOLTAGE / DEFECTIVE BATTERY
1. Disconnect both batteries.
  NOTE:
  Keep the batteries disconnected through the entire test procedure.
2. Perform a battery test using the Midtronics Battery Tester.
  Do both batteries pass the Midtronics Battery Tester?
  
  Yes
  - Go To 3
  No
  - Recharge or replace the battery(s).
  - Perform the POWERTRAIN VERIFICATION TEST. Refer to POWERTRAIN VERIFICATION TEST .
CHECK THE PCM FUSED B+ CIRCUITS
1. Turn the ignition off.
2. Disconnect the PCM harness connectors.
3. Measure the resistance between the positive battery post and the five PCM supply circuits.
  Is the resistance below 5.0 Ohms?
  
  Yes
  - Go To 4
  No
  - Repair the open fused B+ circuit to PCM. Make sure to check all fuses in the Main PDC and Auxiliary PDC for an open.
  - Perform the POWERTRAIN VERIFICATION TEST. Refer to POWERTRAIN VERIFICATION TEST .
CHECK THE PCM GROUND CIRCUITS
1. Measure the resistance between the negative battery post and the five PCM ground circuits.
  Is the resistance less than 5.0 Ohms?
  
  Yes
  - Go To 5
  No
  - Repair the open ground circuit.
  - Perform the POWERTRAIN VERIFICATION TEST. Refer to POWERTRAIN VERIFICATION TEST .
BATTERY POSITIVE SHORTED TO OTHER CIRCUITS
1. Measure the resistance between the three PCM supply circuits and all other circuits in the PCM harness connector, except other supply circuits.
  Is the resistance greater than 10k Ohms?
  
  Yes
  - Go To 6
  No
  - Repair the battery circuit short to other circuits in engine harness.
  - Perform the POWERTRAIN VERIFICATION TEST. Refer to POWERTRAIN VERIFICATION TEST .
RETURN CIRCUIT SHORTED
1. Measure the resistance between the three PCM return circuits and all other circuits in the PCM harness connector, except other return circuits.
  Is the resistance greater than 10k Ohms?
  
  Yes
  - Go To 7
  No
  - Repair or replace the engine harness.
  - Perform the POWERTRAIN VERIFICATION TEST. Refer to POWERTRAIN VERIFICATION TEST .
BATTERY POSITIVE SHORTED TO GROUND
1. Measure the resistance between the PCM B+ supply circuits and ground.
  Is the resistance greater than 10k Ohms?
  
  Yes
  - Perform the INTERMITTENT CONDITION diagnostic procedure. Refer to INTERMITTENT CONDITION .
  No
  - Repair Battery Positive circuit that is shorted to ground.
  - Perform the POWERTRAIN VERIFICATION TEST. Refer to POWERTRAIN VERIFICATION TEST .