Engine Oil Life Monitor

Purpose:
When the PCM determines that the engine oil is near the end of its useful life, it will command the cluster via serial data CKT 800, to illuminate the "Change Oil Soon" indicator or "Change Oil Soon/Now" message after start-up.

Operation:
To determine the engine oil life remaining, the PCM monitors engine coolant temperature, the number of crankshaft revolutions, vehicle speed, engine speed, and calculated oil temperature.

The PCM will command the indicator or message "ON" after each start-up until the engine oil life monitor is reset. To reset the oil life monitor, display the oil life index on the DIC, then hold the RESET button for five seconds. When a DIC message of RESET is displayed and the oil life index equals 100%, the reset is complete.