PINPOINT TEST Y : The Low Oil Pressure Message Center Warning Indicator Is Never or Always On: Notes

Diagnostic Overview

Refer to Instrument Cluster for schematic and connector information.

Normal Operation and Fault Conditions

Refer to Message Center , Low Oil Pressure Message Center Warning Indicator.

NOTE: If DTC U0100:00 sets in the IPC, other observable symptoms can be an inoperative speedometer, tachometer, temperature gauge or odometer.

If the IPC fails to receive the oil pressure warning message from the PCM for less than 5 seconds, the IPC defaults the low oil pressure warning indicator to the last state (on or off), based upon the last known good oil pressure status message.

If the IPC fails to receive the oil pressure warning message from the PCM for 5 seconds or longer, the IPC sets DTC U0100:00 in continuous memory and defaults the low oil pressure warning indicator on or active.

Visual Inspection and Diagnostic Pre-checks

Start the engine and listen for engine noise that indicates a low engine oil pressure concern.
Inspect the tachometer to ensure that it is functioning correctly.
Inspect the engine oil pressure switch for signs of external damage.
Inspect the engine oil pressure switch connector for signs of corrosion and inspect the harness for damage indicating a cut, open or circuit shorted to ground.