OIL PRESSURE SENSOR FAULTED LOW (BCM)
For a complete wiring diagram Refer to Section 8W.
Diagnostic Test
- When Monitored:
With the ignition on.
- Set Condition:
Oil Pressure Sensor voltage low.
| Possible Causes |
| (K301) 5-VOLT SUPPLY CIRCUIT |
| (K302) OIL PRESSURE SENSOR SIGNAL CIRCUIT SHORTED TO GROUND |
| (K302) OIL PRESSURE SENSOR SIGNAL CIRCUIT SHORTED TO THE (K300) SENSOR GROUND CIRCUIT |
| (K301) 5-VOLT SUPPLY CIRCUIT OPEN |
| (K301) 5-VOLT SUPPLY CIRCUIT SHORTED TO GROUND |
| OIL PRESSURE SENSOR |
| BCM |
Diagnostic Test
1. OIL SENSOR VOLTAGE BELOW 0.08 OF A VOLTIgnition on, engine not running.
With a scan tool, read the MAP Sensor voltage.
Is the voltage below 0.08 of a volt?
Yes
- Go To 2
No
- Refer to the INTERMITTENT CONDITION Diagnostic Procedure.
- Perform the POWERTRAIN VERIFICATION TEST. (Refer to 9 - ENGINE - STANDARD PROCEDURE)
2. (K301) 5-VOLT SUPPLY CIRCUIT
Turn the ignition off.
Disconnect the Oil Pressure Sensor harness connector.
Ignition on, engine not running.
Measure the voltage on the (K301) 5-volt Supply circuit in the Oil Pressure Sensor harness connector.
Is the voltage between 4.5 to 5.2 volts?
Yes
- Go To 3
No
- Go To 6
3. OIL PRESSURE SENSOR
With a scan tool, monitor the Oil Pressure Sensor voltage with the Sensor harness connector disconnected.
Is the voltage above 4.5 volts?
Yes
- Replace the Oil Pressure Sensor.
- 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 SHORTED TO GROUND
Turn the ignition off.
Disconnect the BCM C2 harness connector.
Measure the resistance between ground and the (K302) Oil Pressure Sensor Signal circuit in the Oil Pressure Sensor harness connector.
Is the resistance below 100 ohms?
Yes
- Repair the short to ground 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 5
5. (K302) OIL PRESSURE SENSOR SIGNAL CIRCUIT SHORTED TO THE (K300) SENSOR GROUND CIRCUIT
Measure the resistance between the (K302) Oil Pressure Sensor Signal circuit and the (K300) Sensor ground circuit in the Oil Pressure Sensor harness connector.
Is the resistance below 100 ohms?
Yes
- Repair the short between the (K302) Oil Pressure Sensor Signal circuit and the (K300) Sensor ground circuit.
- Perform the BODY VERIFICATION TEST. (Refer to 8 - ELECTRICAL/ELECTRONIC CONTROL MODULES - STANDARD PROCEDURE)
No
- Go To 6
6. (K301) 5-VOLT SUPPLY CIRCUIT OPEN
Turn the ignition off.
Disconnect the BCM C2 harness connector.
Measure the resistance of the (K301) 5-volt Supply circuit.
Is the resistance below 5.0 ohms?
Yes
- Go To 7
No
- Repair the open in the (K301) 5-volt Supply circuit.
- Perform the BODY VERIFICATION TEST VER. 1 (Refer to 8 - ELECTRICAL/ELECTRONIC CONTROL MODULES - STANDARD PROCEDURE)
7. (K301) 5-VOLT SUPPLY CIRCUIT SHORTED TO GROUND
Measure the resistance between ground and the (K301) 5-volt Supply circuit in the Oil Pressure Sensor harness connector.
Is the resistance below 100 ohms?
Yes
- Repair the short to ground in the (K301) 5-volt Supply circuit.
- Perform the BODY VERIFICATION TEST. (Refer to 8 - ELECTRICAL/ELECTRONIC CONTROL MODULES - STANDARD PROCEDURE)
No
- Go To 8
8. 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 BODY Control Module per Service Information.
- Perform the BODY VERIFICATION TEST. (Refer to 8 - ELECTRICAL/ELECTRONIC CONTROL MODULES - STANDARD PROCEDURE)