Diagnostic Test

WARNING: This page is about a different car, the 2011 RAM Cab & Chassis. However, it is still accessible from the selected car via links, so may be relevant.

ACTIVE DTC
NOTE:
If a 5-Volt reference DTC is present, repair that DTC before proceeding with this test.
1. Turn the ignition on.
2. With the scan tool, record all Freeze frame data.
3. With the scan tool, erase DTCs.
4. Turn the ignition off for 75 seconds.
5. Turn the ignition on.
6. With the scan tool, read DTCs.
  Did the DTC reset?
  
  Yes
  - Go To 2.
  No
  - Perform the INTERMITTENT CONDITION - 6.7L diagnostic procedure. Refer to INTERMITTENT CONDITION - 6.7L .
CHECK THE FUEL PRESSURE SENSOR
1. Turn the ignition off.
2. Disconnect the Fuel Pressure Sensor harness connector.
3. Turn the ignition on.
  Does the DTC P0193 set?
  
  Yes
  - Replace the Fuel Pressure Sensor in accordance with the service information.
  - Perform the POWERTRAIN VERIFICATION TEST - 6.7L. Refer to POWERTRAIN VERIFICATION TEST - 6.7L .
  No
  - Go To 3.
CHECK THE (K181) FUEL RAIL PRESSURE SENSOR SIGNAL CIRCUIT FOR A SHORT TO GROUND

Fig 1: Fuel Rail Pressure Sensor Connector Pin ID
Courtesy of CHRYSLER LLC
1. Turn the ignition off.
2. Disconnect the PCM C1 harness connector.
  NOTE:
  Check connectors - Clean/repair as necessary.
3. Measure the resistance between ground and the (K181) Fuel Pressure Sensor Signal circuit in the Fuel Pressure Sensor harness connector.
  Is the resistance below 10k Ohms?
  
  Yes
  - Repair the (K181) Fuel Pressure Sensor Signal circuit for a short to ground.
  - Perform the POWERTRAIN VERIFICATION TEST - 6.7L. Refer to POWERTRAIN VERIFICATION TEST - 6.7L .
  No
  - Go To 4.
CHECK FOR THE (K181) FUEL RAIL PRESSURE SENSOR SIGNAL CIRCUIT SHORTED TO THE (K916) SENSOR GROUND

Fig 2: Fuel Rail Pressure Sensor Connector Pin ID
Courtesy of CHRYSLER LLC
1. Measure the resistance between the (K181) Fuel Pressure Sensor Signal circuit and (K916) Sensor Ground circuit at the Fuel Pressure Sensor harness connector.
  Is the resistance below 10k Ohms?
  
  Yes
  - Repair the short between the (K181) Fuel Pressure Sensor Signal circuit and (K916) Sensor Ground circuit.
  - Perform the POWERTRAIN VERIFICATION TEST - 6.7L. Refer to POWERTRAIN VERIFICATION TEST - 6.7L .
  No
  - Go To 5.
CHECK THE (K916) SENSOR GROUND CIRCUIT FOR AN OPEN/HIGH RESISTANCE

Fig 3: Checking Sensor Ground Circuit For Open Or High Resistance
Courtesy of CHRYSLER LLC
1. Measure the resistance of the (K916) Sensor Ground circuit between the Fuel Pressure Sensor harness connector and the PCM C1 harness connector.
  Is the resistance below 5.0 Ohms?
  
  Yes
  - Replace the Powertrain Control Module in accordance with the service information.
  - Perform the POWERTRAIN VERIFICATION TEST - 6.7L. Refer to POWERTRAIN VERIFICATION TEST - 6.7L .
  No
  - Repair the (K916) Sensor Ground circuit for an open circuit or high resistance.
  - Perform the POWERTRAIN VERIFICATION TEST - 6.7L. Refer to POWERTRAIN VERIFICATION TEST - 6.7L .