Malfunction Indicator Lamp (MIL)

The malfunction indicator lamp (MIL) is on the instrument panel (IP). The MIL has the following functions:
^ The MIL informs the driver that a fault that affects the vehicle's emission levels has occurred. The owner should take the vehicle for service as soon as possible.
^ The MIL functions as a bulb and system check. The MIL illuminates with the key ON and the engine OFF. When the engine is started, the MIL turns OFF if DTCs are not set.

When the MIL remains on with the engine running, or when a malfunction is suspected due to a driveability or emissions problem, perform the Diagnostic System Check-Computers and Controls Systems. The procedures for this check is provided in Computers and Controls Systems. This check exposes faults that the technician may not detect if other diagnostics are performed first.

Intermittent Malfunction Indicator Lamp (MIL)
In the case of an intermittent malfunction, the malfunction indicator lamp (MIL) may illuminate, but the MIL will turn OFF after 3 trips. The corresponding diagnostic trouble code will be stored in the memory, however. When an unexpected diagnostic trouble code appears, check for an intermittent malfunction.