Diagnostic Test

WARNING: This page is about a different car, the 2011 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.
P051C ACTIVE
Is DTC P051C active?

Yes
- Go To 3.
No
- Perform the INTERMITTENT CONDITION diagnostic procedure. Refer to INTERMITTENT CONDITION - 6.7L .
CHECK THE (F857) 5-VOLT SUPPLY CIRCUIT
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 across the (F857) 5-Volt supply circuit and the (K916) Sensor Return circuit at the Crankcase Pressure Sensor harness connector.
  Is the voltage between 4.5 and 5.5 Volts?
  
  Yes
  - Go To 4.
  No
  - Go To 6.
CHECK THE CRANKCASE PRESSURE SENSOR

Fig 1: Crankcase Pressure Sensor Harness Connector
Courtesy of CHRYSLER LLC
1. While monitoring scan tool, use a jumper wire to connect the (F857) 5-Volt supply circuit with the (K926) Crankcase Pressure Signal circuit at the Crankcase Pressure Sensor harness connector.
  Does the scan tool show a P051D 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
  - Go To 5.
CHECK FOR THE (K926) CRANKCASE PRESSURE SIGNAL CIRCUIT SHORTED TO THE (K916) SENSOR RETURN CIRCUIT

Fig 2: Checking For Crankcase Pressure Signal Circuit Shorted To Sensor Return Circuit
Courtesy of CHRYSLER LLC
1. Turn the ignition off.
2. Remove the jumper wire.
3. Disconnect the PCM C1 harness connector.
  NOTE:
  Check connectors - Clean/repair as necessary.
4. Turn the ignition on.
5. Measure the resistance between the (K926) Crankcase Pressure Signal circuit and (K916) Sensor Return circuit in 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 Signal circuit and (K916) Sensor Return circuit.
  - Perform the POWERTRAIN VERIFICATION TEST - 6.7L. Refer to POWERTRAIN VERIFICATION TEST - 6.7L .
CHECK FOR THE (F857) 5-VOLT SUPPLY CIRCUIT SHORTED TO THE (K916) SENSOR RETURN CIRCUIT

Fig 3: Checking For 5-Volt Supply Circuit Shorted To Sensor Return Circuit
Courtesy of CHRYSLER LLC
1. Turn the ignition off.
2. Measure the resistance between the (F857) 5-Volt Supply circuit and (K916) Sensor Return circuit at the Crankcase Pressure Sensor harness connector.
  Is the resistance above 10k Ohms?
  
  Yes
  - Go To 7.
  No
  - Repair the short between the (F857) 5-Volt Supply circuit and (K916) Sensor Return circuit.
  - Perform the POWERTRAIN VERIFICATION TEST - 6.7L. Refer to POWERTRAIN VERIFICATION TEST - 6.7L .
CHECK THE (K926) CRANKCASE PRESSURE SIGNAL CIRCUIT FOR AN OPEN/HIGH RESISTANCE

Fig 4: Checking Crankcase Pressure Signal Circuit For An Open Or High Resistance
Courtesy of CHRYSLER LLC
1. Measure the resistance of the (K926) Crankcase Pressure Signal circuit between the Crankcase Pressure Sensor harness connector and the PCM C1 harness connector.
  Is the resistance below 5.0 Ohms?
  
  Yes
  - Go To 8.
  No
  - Repair the (K926) Crankcase Pressure Signal circuit for an open or high resistance.
  - Perform the POWERTRAIN VERIFICATION TEST - 6.7L. Refer to POWERTRAIN VERIFICATION TEST - 6.7L .
CHECK THE (F857) 5-VOLT SUPPLY CIRCUIT FOR AN OPEN/HIGH RESISTANCE
1. Measure the resistance of the (F857) 5-Volt Supply circuit between the Crankcase Pressure Sensor harness connector and the PCM C1 harness connector.
  Is the resistance below 5.0 Ohms?
  
  Yes
  - Go To 9.
  No
  - Repair the (F857) 5-Volt Supply circuit for an open or high resistance.
  - Perform the POWERTRAIN VERIFICATION TEST - 6.7L. Refer to POWERTRAIN VERIFICATION TEST - 6.7L .
CHECK THE (K926) CRANKCASE PRESSURE SIGNAL CIRCUIT FOR A SHORT TO GROUND

Fig 5: Checking Crankcase Pressure Signal Circuit For Short To Ground
Courtesy of CHRYSLER LLC
1. Measure the resistance between ground and the (K926) Crankcase Pressure Signal circuit at the Crankcase Pressure Sensor harness connector.
  Is the resistance above 10k Ohms?
  
  Yes
  - Go To 10.
  No
  - Repair the (K926) Crankcase Pressure Signal circuit for a short to ground.
  - Perform the POWERTRAIN VERIFICATION TEST - 6.7L. Refer to POWERTRAIN VERIFICATION TEST - 6.7L .
POWERTRAIN CONTROL MODULE
1. While monitoring scan tool, use a jumper wire to connect the (F857) 5-Volt supply circuit with the (K926) Crankcase Pressure Signal circuit at the Crankcase Pressure Sensor harness connector.
  Does the scan tool show a P051D DTC?
  
  Yes
  - Perform the INTERMITTENT CONDITION diagnostic procedure. Refer to INTERMITTENT CONDITION - 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 .