TEST
ACTION
APPLICABILITY
2
Turn the ignition off.
Disconnect the Oil Pressure Sensor harness connector.
Disconnect the ECM harness connectors.
Remove the ECM/PCM Relay from the IPM.
Connect a jumper wire between cavity 30 and cavity 87 of the ECM/PCM Relay
connector.
Turn the ignition on.
Measure the voltage between ground and the Sensor Reference A circuit at the Oil
Pressure Sensor harness connector.
Is the voltage above 1.0 volt?
All
Yes
→ Repair the Sensor Reference A circuit for a short to voltage.
Perform ROAD TEST VERIFICATION - VER-2.
No
→ Go To 3
3
Turn the ignition off.
Disconnect the ECM harness connectors.
Disconnect the Oil Pressure Sensor harness connector.
Measure the resistance between ground and the Sensor Reference A circuit at the Oil
Pressure Sensor harness connector.
Is the resistance above 1000 ohms?
All
Yes
→ Go To 4
No
→ Repair the Sensor Reference A circuit for a short to ground.
Perform ROAD TEST VERIFICATION - VER-2.
4
Turn the ignition off.
Disconnect the ECM harness connectors.
Disconnect the Oil Pressure Sensor harness connector.
Measure the resistance between Sensor Ground and the 5-volt Supply circuit at the
Oil Pressure Sensor harness connector.
Is the resistance above 1000 ohms?
All
Yes
→ Replace and program the Engine Control Module in accordance
with the Service Information.
Perform ROAD TEST VERIFICATION - VER-2.
No
→ Repair the 5-volt Supply circuit for a short to Sensor Ground.
Perform ROAD TEST VERIFICATION - VER-2.
111
DRIVEABILITY - DIESEL
P0520-OIL PRESS SENSOR CKT MALF SUPPLY VOLTAGE TOO HIGH OR
LOW —
Continued