Skylark L4-138 2.3L SOHC VIN 3 MFI QUAD 4 (1992)
Oil Level Warning Indicator: Description and Operation
The CHECK OIL Indicator lights to warn the driver that the engine oil level is low. When the Ignition Switch is first moved to "RUN," the oil level
indicator lights for about 1 and 1/2 seconds as a bulb check. The oil level detection circuit has two internal timers. The first timer records the amount of
time that the ignition has been off. The second timer records the amount of time that the ignition had been in "ON" before the ignition was shut off. The
instrument panel cluster uses this information to determine if the engine has been sitting along enough for the engine oil to have returned to the engine oil
pan. The cluster's oil level monitoring circuits will check the oil level switch if one of the following two conditions are true:
1. The ignition has been off for more than 30 minutes.
2. The ignition has been off for at least 3 minutes after the ignition has been on for at least 12 minutes.
If the oil level is low (oil level switch open), the CHECK OIL Indicator will be turned on for the remainder of the ignition cycle. The oil level is
monitored by the cluster only when the ignition is first moved to "RUN." It does not continuously monitor the engine oil level.
