Diagnostic Test

WARNING: This page is about a different car, the 2014 RAM 1500. However, it is still accessible from the selected car via links, so may be relevant.

DTC IS ACTIVE
1. Ignition on, engine not running.
2. With the scan tool, erase DTCs in the PCM.
3. Cycle the ignition key off and on several times, leaving the ignition on for at least 10 seconds at a time.
4. Start the engine and let it run for two minutes.
5. With the scan tool, select View DTCs.
  Is the status Active for this DTC?
  
  Yes
  - Go To 2
  No
  - Perform the INTERMITTENT CONDITION diagnostic procedure. Refer to INTERMITTENT DTC .
CHECK THE (K68) INLET AIR PRESSURE SIGNAL CIRCUIT FOR A SHORT TO GROUND
1. Turn the engine off. Leave the ignition off.
2. Disconnect the MAF/Intake Air Sensor harness connector.
3. Ignition on, engine not running.
4. Measure the voltage on the (K68) Inlet Air Pressure Signal circuit at the MAF/Intake Air Sensor harness connector.
  Is the voltage above 5.2 Volts?
  
  Yes
  - Repair the (K68) Inlet Air Pressure Signal circuit for a short to voltage.
  - Perform the PCM VERIFICATION TEST. Refer to PCM VERIFICATION TEST .
  No
  - Go To 3
CHECK THE (K68) INLET AIR PRESSURE SIGNAL CIRCUIT FOR AN OPEN/HIGH RESISTANCE
1. Turn the ignition off.
2. Disconnect the PCM C1 harness connector.
3. Measure the resistance of the (K68) Inlet Air Pressure Signal circuit between the MAF/Intake Air Sensor harness connector and the PCM C1 harness connector.
  Is the resistance above 5.0 Ohms?
  
  Yes
  - Repair the (K68) Inlet Air Pressure Signal circuit for an open/high resistance.
  - Perform the PCM VERIFICATION TEST. Refer to PCM VERIFICATION TEST .
  No
  - Go To 4
MAF/INTAKE AIR SENSOR
1. Replace the Mass Air Flow/Intake Air Sensor in accordance with the service information.
2. Turn the ignition on.
3. With the scan tool, erase PCM DTCs.
4. Perform several ignition key cycles leaving the ignition on for at least 10 seconds per cycle.
5. Start the engine and let it run for two minutes.
6. With the scan tool, read PCM DTCs.
  Does the scan tool display this DTC?
  
  Yes
  - Replace the Powertrain Control Module in accordance with the service information. Refer to REMOVAL .
  - Perform the PCM VERIFICATION TEST. Refer to PCM VERIFICATION TEST .
  No
  - Test complete.
  - Perform the PCM VERIFICATION TEST. Refer to PCM VERIFICATION TEST .