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.

OTHER DTCS
1. Ignition on, engine not running.
2. With the scan tool, read DTCs.
  Are there any 5-Volt Reference DTCs present?
  
  Yes
  - Repair the 5-Volt Reference DTCs before proceeding.
  - Perform the POWERTRAIN VERIFICATION TEST - 6.7L. Refer to POWERTRAIN VERIFICATION TEST - 6.7L .
  No
  - Go To 2.
P051C ACTIVE
Is DTC P051C 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
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 4.9 and 5.1 Volts?
  
  Yes
  - Go To 4.
  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 CRANKCASE PRESSURE SENSOR

Fig 1: Crankcase Pressure Sensor Harness Connector
Courtesy of CHRYSLER LLC
1. While monitoring scan tool, connect a jumper between the (F857) 5-Volt Supply circuit and the (K926) Crankcase Pressure Sensor Signal circuit at the Crankcase Pressure Sensor harness connector.
  Does the scan tool display DTC P051D as active or pending and P051C as stored with the jumper in place?
  
  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 SENSOR SIGNAL CIRCUIT SHORTED TO THE (K916) SENSOR GROUND 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.
3. Disconnect the PCM C1 harness connector.
  NOTE:
  Check connectors - Clean/repair as necessary.
4. Measure the resistance between the (K926) Crankcase Pressure Sensor Signal circuit and (K916) Sensor Ground 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 Sensor Signal circuit and (K916) Sensor Ground circuit.
  - 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 3: Checking Crankcase Pressure Signal Circuit For Short To Ground
Courtesy of CHRYSLER LLC
1. Measure the resistance between ground and the (K926) Crankcase Pressure Sensor Signal circuit at the Crankcase Pressure Sensor harness connector.
  Is the resistance above 10k Ohms?
  
  Yes
  - Go To 7.
  No
  - Repair the (K926) Crankcase Pressure Sensor Signal circuit for a short to ground.
  - Perform the POWERTRAIN VERIFICATION TEST - 6.7L. Refer to POWERTRAIN VERIFICATION TEST - 6.7L .
CHECK THE (K926) CRANKCASE PRESSURE SENSOR 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
  - Replace the Powertrain Control Module (PCM) in accordance with the service information.
  - Perform the POWERTRAIN VERIFICATION TEST - 6.7L. Refer to POWERTRAIN VERIFICATION TEST - 6.7L .
  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 .