OIL PRESSURE SENSOR FAULTED HIGH
For a complete wiring diagram Refer to Section 8W.
Diagnostic Test
- When Monitored:
With the ignition on.
- Set Condition:
Oil Pressure Sensor voltage high.
| Possible Causes |
| (K302) OIL PRESSURE SENSOR SIGNAL CIRCUIT SHORTED TO BATTERY VOLTAGE |
| (K302) OIL PRESSURE SENSOR SIGNAL CIRCUIT OPEN |
| (K302) OIL PRESSURE SENSOR SIGNAL CIRCUIT OPEN |
| (K300) SENSOR GROUND CIRCUIT OPEN |
| OIL PRESSURE SENSOR |
| POWERTRAIN CONTROL MODULE (PCM) |
Diagnostic Test
1. OIL PRESSURE SENSOR VOLTAGE ABOVE 4.92 VOLTSStart the engine.
With a scan tool, read the Oil Pressure Sensor voltage.
Is the voltage above 4.92 volts?
Yes
- Go To 2
No
- Refer to the INTERMITTENT CONDITION Diagnostic Procedure.
- Perform the POWERTRAIN VERIFICATION TEST. (Refer to 9 - ENGINE - STANDARD PROCEDURE)
2. OIL PRESSURE SENSOR
Turn the ignition off.
Disconnect the Oil Pressure Sensor harness connector.
Connect a jumper wire between the (K302) Oil Pressure Sensor Signal circuit and the (K300) Sensor ground circuit in the Sensor harness connector.
Ignition on, engine not running.
With a scan tool, monitor the Oil Pressure Sensor voltage.
Is the voltage below 1.0 volt with the jumper wire installed?
Yes
- Replace the Oil Pressure Sensor.
- Perform the BODY VERIFICATION TEST. (Refer to 8 - ELECTRICAL/ELECTRONIC CONTROL MODULES - STANDARD PROCEDURE)
No
- Go To 3
NOTE: Remove the jumper wire before continuing.
3. (K302) OIL PRESSURE SENSOR SIGNAL CIRCUIT SHORTED TO BATTERY VOLTAGE
Turn the ignition off.
Disconnect the BCM C2 harness connector.
Ignition on, engine not running.
Measure the voltage on the (K302) Oil Pressure Sensor Signal circuit in the Oil Pressure Sensor harness connector.
Is the voltage above 5.2 volts?
Yes
- Repair the short to battery voltage in the (K302) Oil Pressure Sensor Signal circuit.
- Perform the BODY VERIFICATION TEST. (Refer to 8 - ELECTRICAL/ELECTRONIC CONTROL MODULES - STANDARD PROCEDURE)
No
- Go To 4
4. (K302) OIL PRESSURE SENSOR SIGNAL CIRCUIT OPEN
Turn the ignition off.
Measure the resistance of the (K302) Oil Pressure Sensor Signal circuit.
Is the resistance below 5.0 ohms?
Yes
- Go To 5
No
- Repair the open in the (K302) Oil Pressure Sensor Signal circuit.
- Perform the POWERTRAIN VERIFICATION TEST. (Refer to 9 - ENGINE - STANDARD PROCEDURE)
5. (K302) OIL PRESSURE SENSOR SIGNAL CIRCUIT SHORTED TO THE (K301) 5–VOLT SUPPLY CIRCUIT
Disconnect the BCM C2 harness connector.
Measure the resistance between the (K302) Oil Pressure Sensor Signal circuit and the (K301) 5-volt Supply circuit in the Oil Pressure Sensor harness connector.
Is the resistance below 100 ohms?
Yes
- Repair the short between the (K301) 5-volt Supply circuit and the (K302) Oil Pressure Sensor Signal circuit.
- Perform the BODY VERIFICATION TEST. (Refer to 8 - ELECTRICAL/ELECTRONIC CONTROL MODULES - STANDARD PROCEDURE)
No
- Go To 6
6. (K300) SENSOR GROUND CIRCUIT OPEN
Measure the resistance of the (K300) Sensor ground circuit.
Is the resistance below 5.0 ohms?
Yes
- Go To 7
No
- Repair the open in the (K300) Sensor ground circuit.
- Perform the BODY VERIFICATION TEST. (Refer to 8 - ELECTRICAL/ELECTRONIC CONTROL MODULES - STANDARD PROCEDURE)
7. BCM
NOTE: Before continuing, check the BCM harness connector terminals for corrosion, damage, or terminal push out. Repair as necessary.
Using the schematics as a guide, inspect the wire harness and connectors. Pay particular attention to all Power and Ground circuits.
Were there any problems found?
Yes
- Repair as necessary.
- Perform the BODY VERIFICATION TEST. (Refer to 8 - ELECTRICAL/ELECTRONIC CONTROL MODULES - STANDARD PROCEDURE)
No
- Replace and program the Powertrain Control Module per Service Information.
- Perform the POWERTRAIN VERIFICATION TEST. (Refer to 9 - ENGINE - STANDARD PROCEDURE)