Diagnostic Test

WARNING: This page is about a different car, the 2012 RAM Pickup. However, it is still accessible from the selected car via links, so may be relevant.

OTHER DTCS
1. Ignition on, engine not running.
2. With the scan tool, read DTCs.
  Are there any 5-Volt supply DTCs ?
  
  Yes
  - Repair other DTCs first.
  No
  - Go To 2.
P051D ACTIVE
Is DTC P051D active?

Yes
- Go To 3.
No
- Perform the INTERMITTENT CONDITION - 6.7L diagnostic procedure. Refer to INTERMITTENT CONDITION - 6.7L .
CHECK THE (F857) 5-VOLT SUPPLY CIRCUIT FOR A SHORT TO VOLTAGE

Fig 1: Checking 5-Volt Supply Circuit For Short To Voltage
Courtesy of CHRYSLER GROUP, LLC
1. Turn the ignition off.
2. Disconnect the Crankcase Pressure Sensor harness connector.
  NOTE:
  Check connectors - Clean/repair as necessary.
3. Turn the ignition on.
4. Measure the voltage on the (F857) 5-Volt Supply circuit at the Crankcase Pressure Sensor harness connector.
  Is the voltage reading above 5.1 Volts?
  
  Yes
  - Repair the (F857) 5-Volt Supply circuit for a short to voltage.
  - Perform the POWERTRAIN VERIFICATION TEST - 6.7L. Refer to POWERTRAIN VERIFICATION TEST - 6.7L .
  No
  - Go To 4.
CHECK THE (K926) CRANKCASE PRESSURE SENSOR SIGNAL CIRCUIT FOR A SHORT TO VOLTAGE

Fig 2: Checking Crankcase Pressure Sensor Signal Circuit For Short To Voltage
Courtesy of CHRYSLER GROUP, LLC
1. Turn the ignition off.
2. Disconnect the PCM C1 harness connector.
  NOTE:
  Check connectors - Clean/repair as necessary.
3. Turn the ignition on.
4. Measure the voltage on the (K926) Crankcase Pressure Sensor Signal circuit at the Crankcase Pressure Sensor harness connector.
  Is there any voltage present?
  
  Yes
  - Repair the (K926) Crankcase Pressure Sensor Signal circuit for a short to voltage.
  - Perform the POWERTRAIN VERIFICATION TEST - 6.7L. Refer to POWERTRAIN VERIFICATION TEST - 6.7L .
  No
  - Go To 5.
CHECK FOR THE (K926) CRANKCASE PRESSURE SENSOR SIGNAL CIRCUIT SHORTED TO THE (F857) 5-VOLT SUPPLY CIRCUIT

Fig 3: Checking For Crankcase Pressure Sensor Signal Circuit Shorted To 5-Volt Supply Circuit
Courtesy of CHRYSLER GROUP, LLC
1. Turn the ignition off.
2. Measure the resistance between the (K926) Crankcase Pressure Sensor Signal circuit and the (F857) 5-Volt Supply circuit at the Crankcase Pressure Sensor harness connector.
  Is the resistance above 10k Ohms?
  
  Yes
  - Go To 6.
  No
  - Repair the short between the (K926) Crankcase Pressure Sensor Signal circuit and the (F855) 5-Volt Supply circuit.
  - Perform the POWERTRAIN VERIFICATION TEST - 6.7L. Refer to POWERTRAIN VERIFICATION TEST - 6.7L .
CHECK THE (K916) SENSOR RETURN CIRCUIT FOR AN OPEN/HIGH RESISTANCE

Fig 4: Checking Sensor Return Circuit For An Open Or High Resistance
Courtesy of CHRYSLER GROUP, LLC
1. Measure the resistance of the (K916) Sensor Return circuit between the Crankcase Pressure Sensor harness connector and the PCM C1 harness connector.
  Is the resistance below 5.0 Ohms?
  
  Yes
  - Go To 7.
  No
  - Repair the (K916) Sensor Return circuit for an open or high resistance.
  - Perform the POWERTRAIN VERIFICATION TEST - 6.7L. Refer to POWERTRAIN VERIFICATION TEST - 6.7L .
CHECK THE CRANKCASE PRESSURE SENSOR
1. Reconnect the PCM harness connectors.
2. Turn the ignition on.
3. While monitoring the scan tool, use a jumper wire to connect the (K916) Sensor Return circuit to the (K926) Crankcase Pressure Signal circuit at the Crankcase Pressure Sensor harness connector.
  Does the scan tool show a P051C Crankcase Pressure Sensor low DTC?
  
  Yes
  - Replace the Crankcase Pressure Sensor in accordance with the service information.
  - Perform the POWERTRAIN VERIFICATION TEST - 6.7L. Refer to POWERTRAIN VERIFICATION TEST - 6.7L .
  No
  - 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 .