Oil Level Warning Indicator: Description and Operation

CIRCUIT OPERATION
The "LOW OIL LEVEL" indicator ground is controlled by the Engine Low Oil Module. To check for a low oil condition, the Engine Low Oil Module looks for a ground through the Oil Level Sensor/Switch after the Ignition Switch has been turned to "OFF" or "LOCK."

The Engine Low Oil Module checks for a low oil condition 32 minutes after the Ignition Switch is turned to "OFF" or "LOCK," if the previous ignition cycle was less than twelve minutes. If the previous ignition cycle was longer than twelve minutes, the Engine Low Oil Module checks for a low oil condition three minutes after the Ignition Switch is turned to "OFF" or "LOCK."

The bulb test takes four to five seconds and is independent of a ground through the Oil Level Sensor/Switch. The bulb test occurs every time the Ignition Switch is turned "ON."

When the Engine Low Oil Module loses the ground through the Oil Level Sensor/Switch (Oil Level Sensor/Switch open indicating low oil level) the Engine Low Oil Module grounds the "LOW OIL LEVEL" Indicator for the duration of the next ignition cycle.