OTC 52 4

Possible Causes

• •Faulty Oiling System
• •Faulty wiring between ECM and Oil pressure sensor
• •Faulty oil pressure sender
• •Faulty wiring between terminal 3 and Terminal 25
• •Faulty DEPR / ECM
• •Intermittent problem

Suggested Actions

1. 1Perform On-Board (OBD) System Check
2. 2Verify engine oil pressure using a mechanical oil pressure gauge
3. 3Repair faulty Oiling System
4. 4Clear DTC 524 and warm the engine by idling until ECT temperature is above 160 degrees F and has been running for at least 20 seconds
5. 5Check terminal 3 on the sensor for a 5 volt reference from the ECM using a voltmeter
6. 6Check terminal 19 on the ECM for a 5 volt reference using a voltmeter
7. 7Repair faulty wiring between ECM and Oil pressure sensor
8. 8Check for a voltage signal coming out of terminal 3 with the oil pressure sender connected
9. 9Replace faulty oil pressure sender
10. 10Check for a signal voltage at pin 44 of the ECM with the oil pressure sender connected
11. 11Repair faulty wiring between terminal 3 and Terminal 25
12. 12Replace DEPR / ECM

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