Oil Level Warning Indicator: Testing and Inspection

Fig. 12 Low Oil Level Indicator Diagnosis:

SYSTEM CHECK

With oil at Full mark on dipstick and engine warm, start engine. Warning indicator should come on briefly in Start for bulb test, then go out. Turn engine Off. Drain 2 quarts of oil from engine. Wait for 5 minutes, then restart engine. Warning indicator should come On and stay On.
If indicator does not come On, check the following; indicator, fuse, oil level relay and/or oil level sensor.

SENSOR TEST

If is best to conduct test with sensor in oil pan with hot oil to ensure oil properly drains from sensor. If removed from pan, sensor must first be submerged in warm oil to ensure proper positioning of float before testing. The sensor must be held horizontally during bench testing to ensure float remains correctly positioned.
Connect positive lead of digital volt/ohmmeter to sensor terminal and negative lead to sensor housing. With sensor submerged in oil (engine full), meter should read Open. Resistance should be greater than 100,000 ohms. With sensor out of oil (oil drained), resistance should be less than 1000 ohms.