LSS V6-3.8L VIN K (1997)
Oil Level Sensor For ECM: Description and Operation
Engine Oil Level Sensor
Engine oil level is determined by an optical sensor which detects oil level immediately upon powerup. While the engine oil level sensor is
determining oil level, the sensor holds the state of the engine oil level PCM input circuit at ignition voltage.
The amount of time the engine oil level sensor requires to determine oil level is about 1.5 seconds. After the engine oil level has been determined,
the engine oil level sensor will ground the engine oil level PCM input circuit for 1 to 2 seconds if oil level is OK or 6 to 10 seconds if oil level is
low.
The PCM determines oil level based on the engine oil level PCM input signal duration. The PCM also monitors the engine oil level PCM input
signal to determine whether the engine oil level PCM input circuit is open or shorted.
