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.

CHECK THE ENGINE OIL PRESSURE (EOP) SWITCH
1. Turn the ignition off.
2. Disconnect the Engine Oil Pressure (EOP) Switch harness connector.
  NOTE:
  Check connectors - Clean/repair as necessary.
3. Measure the resistance between the EOP (G6) Signal circuit terminal and ground at the Engine Oil Pressure Switch.
  Is the resistance below 5.0 Ohms?
  
  Yes
  - Go To 2.
  No
  - Replace the Engine Oil Pressure Switch in accordance with the service information.
  - Perform the POWERTRAIN VERIFICATION TEST - 6.7L. Refer to POWERTRAIN VERIFICATION TEST - 6.7L .
CHECK THE EOP (G6) SIGNAL CIRCUIT OPEN/HIGH RESISTANCE
1. Disconnect the C1 PCM harness connector.
  NOTE:
  Check connectors - Clean/repair as necessary.
2. Measure the resistance of the (G6) EOP Signal Circuit between the Engine Oil Pressure Switch harness connector and the PCM C1 harness connector.
  Is the resistance below 5.0 Ohms?
  
  Yes
  - Go To 3.
  No
  - Repair the (G6) EOP Signal Circuit for an open or high resistance.
  - Perform the POWERTRAIN VERIFICATION TEST - 6.7L. Refer to POWERTRAIN VERIFICATION TEST - 6.7L .
POWERTRAIN CONTROL MODULE

Fig 1: Oil Pressure Switch Connector Pin ID
Courtesy of CHRYSLER LLC
1. Reconnect the C1 PCM harness connector.
2. Engine Oil Pressure Switch still disconnected.
3. Turn the ignition on.
4. Measure the voltage between ground and the (G6) EOP Signal circuit at the Engine Oil Pressure Switch harness connector.
  Is the voltage between 4.5 and 5.5 Volts?
  
  Yes
  - Perform the INTERMITTENT CONDITION - 6.7L 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 .