RELAY 4420468 - Caterpillar

The Engine Control Module (ECM) detects the following conditions:
The signal voltage from the engine oil pressure sensor is greater than 4.95 VDC for more than eight seconds.
The ECM has been powered for at least two seconds.
The 168-01 Low ECM Battery Power is not active.
The 232-03 5 Volt Supply voltage high is not active.
The 232-04 5 Volt Supply voltage low is not active.
The engine is not running or the engine coolant temperature is greater than 38 °C (100 °F).System Response:The ECM will log the diagnostic code and the ECM will trigger a snapshot. The check engine lamp will illuminate once this diagnostic code has been active for more than ten hours. The ECM will default to 600 kPa (88 psi) for engine oil pressure.Note: The engine oil pressure that is displayed on the Caterpillar Electronic Technician (ET) is the default value for engine oil pressure.Possible Performance Effect:NoneTroubleshooting:Test Step 1. Perform the following diagnostic procedure: "Engine Pressure Sensor Open or Short Circuit - Test"Results:
OK - STOP