Diagnostic Test

WARNING: This page is about a different variant/trim than selected.

CHECK FOR AN ACTIVE DTC
1. Verify engine oil level.
2. Turn the ignition on.
3. With the scan tool, read DTCs.
  Is the DTC active?
  
  Yes
  - Go To 2
  No
  - Perform the INTERMITTENT CONDITION diagnostic procedure. Refer to INTERMITTENT CONDITION .
CHECK THE (G6) ENGINE OIL PRESSURE SIGNAL CIRCUIT FOR A SHORT TO VOLTAGE
1. Turn the ignition off.
2. Disconnect the Engine Oil Pressure Sensor harness connector.
3. Turn the ignition on.
4. Measure the voltage between ground and the (G6) Engine Oil Pressure Signal circuit at the Engine Oil Pressure harness connector.
  Is the voltage above 5.2 volts?
  
  Yes
  - Repair the (G6) Engine Oil Pressure Signal circuit for a short to voltage.
  - Perform the POWERTRAIN VERIFICATION TEST. Refer to POWERTRAIN VERIFICATION TEST .
  No
  - Go To 3
CHECK THE (G6) ENGINE OIL PRESSURE SIGNAL CIRCUIT FOR AN OPEN/HIGH RESISTANCE
1. Turn the ignition off.
2. Disconnect the PCM C2 harness connector.
  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 the GPEC Diagnostic Adaptor to perform the diagnosis.
3. Connect the (special tool #10436, Adapter, GPEC Diagnostic).
4. Measure the resistance of the (G6) Engine Oil Pressure Signal circuit from the Engine Oil Pressure Sensor harness connector to the GPEC Adaptor.
  Is the resistance below 3.0 Ohms?
  
  Yes
  - Go To 4
  No
  - Repair the (G6) Engine Oil Pressure Signal circuit for an open or high resistance.
  - Perform the POWERTRAIN VERIFICATION TEST. Refer to POWERTRAIN VERIFICATION TEST .
CHECK THE (K900) SENSOR GROUND CIRCUIT FOR AN OPEN/HIGH RESISTANCE
1. Check for continuity between the (K900) Sensor Ground circuit at the Engine Oil Pressure Sensor harness connector and the GPEC Adaptor.
  Is there continuity between the (K900) Sensor Ground circuit at the Engine Oil Pressure Sensor harness connector and the GPEC Adaptor?
  
  Yes
  - Go To 5
  No
  - Repair the (K900) Sensor Ground circuit for an open or high resistance.
  - Perform the POWERTRAIN VERIFICATION TEST. Refer to POWERTRAIN VERIFICATION TEST .
CHECK FOR THE (G6) ENGINE OIL PRESSURE SIGNAL CIRCUIT SHORTED TO THE (F855) 5-VOLT SUPPLY CIRCUIT
1. Measure the resistance between the (G6) Engine Oil Pressure Signal circuit and the (F855) 5-Volt Supply circuit in the Engine Oil Pressure Sensor harness connector.
  Is the resistance above 10k Ohms?
  
  Yes
  - Go To 6
  No
  - Repair the short between the (F855) 5-Volt Supply circuit and the (G6) Engine Oil Pressure Signal circuit.
  - Perform the POWERTRAIN VERIFICATION TEST. Refer to POWERTRAIN VERIFICATION TEST .
ENGINE OIL PRESSURE SENSOR
1. Reconnect the PCM C2 harness connector.
2. Turn the ignition on.
3. With the scan tool, monitor the Engine Oil Pressure Sensor voltage.
4. Connect a jumper between the (G6) Engine Oil Pressure Signal circuit and the (K900) Sensor Ground circuit in the Engine Oil Pressure Sensor harness connector.
  Is the voltage below 0.2 volts with the jumper installed?
  
  Yes
  - Verify that there is good pin to terminal contact in the Sensor and Powertrain Control Module connectors. Replace the Engine Oil Pressure Sensor if no problems were found in the connectors. Refer to SENSOR, OIL PRESSURE, REMOVAL .
  - Perform the POWERTRAIN VERIFICATION TEST. Refer to POWERTRAIN VERIFICATION TEST .
  No
  - Go To 7
    NOTE:
    Remove the jumper before continuing.
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. Verify that there is good pin to terminal contact in the Sensor and Powertrain Control Module connectors.
4. Perform any Service Bulletins that may apply.
  Were there any problems found?
  
  Yes
  - Repair as necessary.
  - Perform the POWERTRAIN VERIFICATION TEST. Refer to POWERTRAIN VERIFICATION TEST .
  No
  - Replace and program the Powertrain Control Module in accordance with the Service Information. Refer to MODULE, POWERTRAIN CONTROL (PCM), REMOVAL .
  - Perform the POWERTRAIN VERIFICATION TEST. Refer to POWERTRAIN VERIFICATION TEST .