Diagnostic Test

WARNING: This page is about a different car, the 2010 Dodge Charger and 2010 Chrysler 300. However, it is still accessible from the selected car via links, so may be relevant.

DTC IS ACTIVE
1. Start the engine and allow it to reach normal operating temperature.
  WARNING: When the engine is operating, do not stand in direct line with the fan. Do not put your hands near the pulleys, belts, or fan. Do not wear loose clothing. Failure to follow these instructions can result in personal injury or death.
  
  NOTE: Diagnose and repair any system voltage or sensor supply voltage DTCs before continuing with this test.
2. With the scan tool, select View DTCs.
  Is the status Active for this DTC?
  
  Yes
  - Go to step 2
  No
  - Refer to the *CHECKING FOR AN INTERMITTENT DTC Diagnostic Procedure. See DTC-Based Diagnostics/MODULE, Powertrain Control (PCM) - Standard Procedure .
(F855) 5 VOLT SUPPLY CIRCUIT SHORTED TO VOLTAGE

Fig 1: CHECKING 5-VOLT SUPPLY CIRCUIT VOLTAGE
Courtesy of CHRYSLER LLC
1. Turn the ignition off.
2. Disconnect the Engine Oil Pressure Sensor connector.
3. Disconnect the Powertrain Control Module (PCM) connector.
4. Turn the ignition on.
5. Measure the voltage of the (F855) 5 Volt Supply circuit in the Engine Oil Pressure Sensor harness connector.
  Is there any voltage present?
  
  Yes
  - Repair the (F855) 5 Volt Supply circuit for a short to voltage.
  - Perform the PCM Verification Test. See DTC-Based Diagnostics/MODULE, Powertrain Control (PCM) - Standard Procedure .
  No
  - Go to step 3
(G6) EOP SIGNAL CIRCUIT SHORTED TO VOLTAGE

Fig 2: CHECKING EOP SIGNAL CIRCUIT FOR SHORT TO VOLTAGE
Courtesy of CHRYSLER LLC
1. Measure the voltage of the (G6) EOP Signal circuit in the Engine Oil Pressure Sensor harness connector.
  Is there any voltage present?
  
  Yes
  - Repair the (G6) EOP Signal circuit for a short to voltage.
  - Perform the PCM Verification Test. See DTC-Based Diagnostics/MODULE, Powertrain Control (PCM) - Standard Procedure .
  No
  - Go to step 4
(G6) EOP SIGNAL CIRCUIT SHORTED TO THE (F855) 5 VOLT SUPPLY CIRCUIT

Fig 3: CHECKING EOP SIGNAL CIRCUIT FOR SHORT TO 5-VOLT SUPPLY CIRCUIT
Courtesy of CHRYSLER LLC
1. Measure the resistance between the (G6) EOP Signal circuit and the (F855) 5 Volt Supply in the Engine Oil Pressure Sensor harness connector.
  Is the resistance below 100 ohms?
  
  Yes
  - Repair the (G6) EOP Signal circuit for a short to the (F855) 5 Volt Supply circuit.
  - Perform the PCM Verification Test. See DTC-Based Diagnostics/MODULE, Powertrain Control (PCM) - Standard Procedure .
  No
  - Go to step 5
(G6) EOP SIGNAL CIRCUIT OPEN OR HIGH RESISTANCE

Fig 4: CHECKING EOP SIGNAL CIRCUIT FOR OPEN OR HIGH RESISTANCE
Courtesy of CHRYSLER LLC
1. Turn the ignition off.
  CAUTION: Do not probe the PCM harness connectors. Probing the PCM harness connectors will damage the PCM terminals, resulting in poor terminal to pin connection. Install Miller Special Tool #8815 to perform diagnosis.
2. Measure the resistance of the (G6) EOP Signal between the Engine Oil Pressure Sensor harness connector and the appropriate terminal of special tool #8815.
  Is the resistance below 5.0 ohms?
  
  Yes
  - Go to step 6
  No
  - Repair the (G6) EOP Signal for an open circuit or high resistance.
  - Perform the PCM Verification Test. See DTC-Based Diagnostics/MODULE, Powertrain Control (PCM) - Standard Procedure .
(K900) SENSOR GROUND CIRCUIT OPEN OR HIGH RESISTANCE

Fig 5: CHECKING SENSOR GROUND CIRCUIT FOR OPEN OR HIGH RESISTANCE
Courtesy of CHRYSLER LLC

CAUTION: Do not probe the PCM harness connectors. Probing the PCM harness connectors will damage the PCM terminals, resulting in poor terminal to pin connection. Install Miller Special Tool #8815 to perform diagnosis.
1. Measure the resistance of the (K900) Sensor Ground circuit between the Engine Oil Pressure Sensor harness connector and the appropriate terminal of special tool #8815.
  Is the resistance below 5.0 ohms?
  
  Yes
  - Go to step 7
  No
  - Repair the (K900) Sensor Ground circuit for an open circuit or high resistance.
  - Perform the PCM Verification Test. See DTC-Based Diagnostics/MODULE, Powertrain Control (PCM) - Standard Procedure .
ENGINE OIL PRESSURE SENSOR

Fig 6: CHECKING EOP SENSOR SIGNAL VOLTAGE
Courtesy of CHRYSLER LLC
1. Turn the ignition off.
2. Connect the Powertrain Control Module (PCM) connector.
3. Connect a jumper wire between the (K900) Sensor Ground circuit and the (G6) EOP Signal circuit in the Engine Oil Pressure Sensor harness connector.
4. Turn the ignition on.
5. With the scan tool, read the Engine Oil Pressure Sensor signal voltage.
  NOTE: The sensor voltage should be approximately 0.0 volts (plus or minus.1 volt) with the jumper wire in place.
  
  Does the scan tool display the voltage as described above?
  
  Yes
  - Replace the Engine Oil Pressure Sensor in accordance with the Service Information.
  - Perform the PCM Verification Test. See DTC-Based Diagnostics/MODULE, Powertrain Control (PCM) - Standard Procedure .
  No
  - Go to step 8
POWERTRAIN CONTROL MODULE (PCM)
1. Using the wiring diagram/schematic as a guide, inspect the wiring and connectors between the Engine Oil Pressure Sensor and the Powertrain Control Module (PCM).
2. Look for any chafed, pierced, pinched, or partially broken wires.
3. Look for broken, bent, pushed out or corroded terminals.
4. Monitor the scan tool data relative to this circuit and wiggle test the wiring and connectors.
5. Look for the data to change or for the DTC to reset during the wiggle test.
6. Refer to any Technical Service Bulletins that may apply.
  Were any problems found?
  
  Yes
  - Repair as necessary.
  - Perform the PCM Verification Test. See DTC-Based Diagnostics/MODULE, Powertrain Control (PCM) - Standard Procedure .
  No
  - Replace and program the Powertrain Control Module (PCM) in accordance with the Service Information.
  - Perform the PCM Verification Test. See DTC-Based Diagnostics/MODULE, Powertrain Control (PCM) - Standard Procedure .