Diagnostic Test

WARNING: This page is about a different car, the 2017 RAM 2500 HD. However, it is still accessible from the selected car via links, so may be relevant.

TEST FOR INTERMITTENT CONDITION
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 IOD fuse is installed and 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 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.
  No
  - Go To 2
CHECK THE (A209) FUSED B(+) CIRCUIT FOR AN OPEN OR SHORT
1. Turn the ignition off.
2. Disconnect the PCM C2 harness connector.
3. Using a 12-volt test light connected to ground, check the (A209) Fused B(+) circuit.
  Does the test light illuminate brightly for each circuit?
  
  Yes
  - Go To 3
  No
  - Repair the open or short in the (A209) Fused B(+) circuit.
  - Perform the POWERTRAIN VERIFICATION TEST. Refer to POWERTRAIN VERIFICATION TEST - 6.7L .
CHECK THE (Z915) GROUND CIRCUITS FOR AN OPEN
1. Using a 12-volt test light connected to 12-volts, check the (Z915) Ground circuits in the PCM C2 harness connector.
  Does the test light illuminate brightly for each circuit?
  
  Yes
  - Go To 4
  No
  - Repair the open in the (Z915) Ground circuit.
  - Perform the POWERTRAIN VERIFICATION TEST. Refer to POWERTRAIN VERIFICATION TEST - 6.7L .
CHECK THE (D27) CAN C BUS (+) CIRCUIT FOR AN OPEN
1. Turn the ignition off.
2. Disconnect the STAR CAN Connector DASH C4 harness connector. and perform the CAN C DASH STAR CONNECTOR REMOVAL process. Refer to STANDARD PROCEDURE .
3. Measure the resistance of the (D27) CAN C Bus (+) circuit between the STAR CAN Connector DASH C4 harness connector and the PCM C1 connector.
  Is resistance below 5.0 Ohms?
  
  Yes
  - Go To 5
  No
  - Repair the open in the (D27) CAN C Bus (+) circuit.
  - Perform the POWERTRAIN VERIFICATION TEST. Refer to POWERTRAIN VERIFICATION TEST - 6.7L .
CHECK THE (D28) CAN C BUS (-) CIRCUIT FOR AN OPEN
1. Measure the resistance of the (D28) CAN C Bus (-) circuit between the STAR CAN Connector DASH C4 harness connector and the PCM C1 connector.
  Is resistance below 5.0 Ohms?
  
  Yes
  - Replace the Powertrain Control Module in accordance with the Service Information. Refer to MODULE, POWERTRAIN CONTROL, (PCM) 6.7L DIESEL, REMOVAL .
  - Perform the POWERTRAIN VERIFICATION TEST. Refer to POWERTRAIN VERIFICATION TEST - 6.7L .
  No
  - Repair the open in the (D28) CAN C Bus (-) circuit.
  - Perform the POWERTRAIN VERIFICATION TEST. Refer to POWERTRAIN VERIFICATION TEST - 6.7L .