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Diagnostic Test

WARNING: This page is about a different car, the 2012 RAM Pickup and 2012 RAM Cab & Chassis. However, it is still accessible from the selected car via links, so may be relevant.
  1. NO START PRE-TEST 
    NOTE:

    Verify no codes are set in the Occupant Restraint Controller. If codes are present, they may be the cause of a No Start condition.

    NOTE:

    The following list of items must be checked before continuing with any no start tests.

    1. The battery must be fully charged and in good condition. A low charged battery may produce invalid test results. If the battery is low, charge the battery and then attempt to start the vehicle by cranking the engine for 15 seconds, three consecutive times. This will allow any DTCs to set that may have been erased due to a dead battery.
    2. Try to communicate with PCM using a scan tool. If communication between the scan tool and PCM is not allowed inspect fuses. If the fuses appear ok, Refer to COMMUNICATION - DIAGNOSIS AND TESTING for the No Response from PCM diagnostic procedure.
    3. Read the PCM DTCs with the scan tool. If any DTCs are present, they must be repaired before continuing with any other No Start diagnostic tests. Refer to 3.7L/4.7L/5.7L - DIAGNOSTIC CODE INDEX - NGC - 1500 & 2500 or 5.7L - DIAGNOSTIC CODE INDEX - 3500 CAB & CHASSIS for the related P-code that is reported by the PCM.
    4. Make sure that the Bus is functional. Attempt to communicate with the Instrument Cluster and Wireless Ignition Node. If you are unable to establish communication with any modules, Refer to COMMUNICATION - DIAGNOSIS AND TESTING for the Diagnostic CAN C diagnostic procedures.
    5. The Wireless Ignition Node must be operating properly. Check for communication with the scan tool and check for DTCs that may be stored in the Wireless Ignition Node. Refer to WIN - DIAGNOSIS AND TESTING . Repair the DTCs before continuing.
    6. If no DTCs are found, using the scan tool, select Clear PCM (BATT Disconnect).
    7. Crank the engine several times. Using the scan tool, View DTCs. If a DTC is present go to and perform the appropriate diagnostic procedure before continuing.

      Were any problems found?

      Yes 

      No 

      • Go To  2.
  2. OPEN FUSE 
    1. Check for any open fuses in the TIPM or Junction Block that may be related to the No Start condition.

      Are any of the fuses open?

      Yes 

      No 

      • Go To  3.
  3. CRANKSHAFT POSITION SENSOR (CKP) 
    1. Turn the ignition off.
    2. Disconnect the CKP Sensor.
    3. Attempt to start the engine.

      Does the engine start?

      Yes 

      No 

      • Go To  4.
  4. CAMSHAFT POSITION SENSOR (CMP) 
    1. Turn the ignition off.
    2. Connect the CKP Sensor.
    3. Disconnect the CMP Sensor.
    4. Attempt to start the engine.

      Does the engine start?

      Yes 

      No 

      • Go To  5.
  5. FUSED B+ CIRCUIT CHECK 
    Fig 1: Checking The PCM Fused B+ Circuits
    GC0091377Courtesy of CHRYSLER GROUP, LLC
    1. Turn the ignition off.
    2. Disconnect the C1 PCM harness connector.
      CAUTION:

      Do not probe the PCM harness connectors. Probing the PCM harness connectors will damage the PCM terminals resulting in poor terminal to pin connection. Install the PCM Pinout Box (special tool #8815A, Kit, NGC, 38 Position) to perform diagnosis.

    3. Using a 12-volt test light connected to ground probe the Fused B+ circuits.

      Does the test light illuminate brightly?

      Yes 

      • Go To  6.

      No 

  6. (F342) ASD CONTROL OUTPUT CIRCUIT OPEN 
    1. Turn the ignition off.
    2. Disconnect the C5 TIPM harness connector.
    3. Disconnect the C1 and C3 PCM harness connectors.
    4. Measure the resistance of the ASD Control Output circuit from the C5 TIPM harness connector to the appropriate terminals of the PCM Pinout Box (special tool #8815A, Kit, NGC, 38 Position), Ignition coil, and the fuel injectors.

      Is the resistance below 5.0 Ohms?

      Yes 

      • Go To  7.

      No 

  7. FUEL PUMP DELIVERY 
    1. Verify that the Fuel tank is not empty before continuing.
    2. Follow the diagnostics for Checking the Fuel Delivery System in the Appropriate Diagnostic Information.

      Was the No Start condition solved after following the Checking the Fuel Delivery System diagnostic procedure?

      Yes 

      • Test Complete.

      No 

      • Go To  8.
  8. ENGINE MECHANICAL 

    Check for any of the following conditions/mechanical problems:

    • ENGINE COMPRESSION - must be within specifications.
    • ENGINE EXHAUST SYSTEM - must be free of any restrictions or leaks.
    • ENGINE VALVE TIMING - must be within specifications, check for broken timing components

    Are there any engine mechanical problems?

    Yes 

    No 

    • Go To  9.
  9. POWERTRAIN CONTROL MODULE (PCM) 
    1. Using the wiring diagram/schematic as a guide, inspect the wiring and connectors between the related Sensors and the Powertrain Control Module (PCM).
    2. Look for any chafed, pierced, pinched or partially broken wires.
    3. Look for broken, bent, pushed out or corroded terminals. Verify that there is good pin to terminal contact in the related Sensors and the Powertrain Control Module connectors.
    4. Refer to any Technical Service Bulletins (TSBs) that may apply.

      Were there any problems found?

      Yes 

      No 

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