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Diagnostic Test

WARNING: This page is about a different car, the 2016 RAM 1500. However, it is still accessible from the selected car via links, so may be relevant.
  1. 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 battery voltage is between 10.0 and 16.0 volts. 
    2. With the scan tool, read the module status.
      NOTE: Check the Body Control Module 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
  2. CHECK THE PCM POWER AND GROUND CIRCUITS 
    1. Check the PCM power and ground circuits. Refer to CHECKING THE PCM POWER AND GROUND CIRCUITS and perform the Checking the PCM Power and Ground Circuits diagnostic procedure.

      Were any problems found? 

        Yes 

      • Repair as necessary.
      • Perform the POWERTRAIN VERIFICATION TEST. Refer to PCM VERIFICATION TEST .

        • No 

      • Go to  3
  3. CHECK THE (D27) CAN C BUS (-) AND (D28) CAN C BUS (+) CIRCUIT FOR AN OPEN 
    1. Turn the ignition off.
    2. Disconnect the STAR Connector C2 harness connector.
    3. Disconnect the PCM C1 harness connector.
    4. Measure the resistance of the (D28) CAN C Bus (+) circuit between the STAR Connector C2 harness connector and the PCM C1 harness connector.
    5. Measure the resistance of the (D27) CAN C Bus (-) circuit between the STAR Connector C2 harness connector and the PCM C1 harness connector.

        Are the resistances below 5.0 Ohms? 

        Yes 

      • Replace and program the Powertrain Control Module in accordance with the Service Information.
      • Perform the POWERTRAIN VERIFICATION TEST. Refer to PCM VERIFICATION TEST .

        • No 

      • Repair the open in the (D27) CAN C Bus (-) or (D28) CAN C Bus (+) circuit.
      • Perform the POWERTRAIN VERIFICATION TEST. Refer to PCM VERIFICATION TEST .
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