Malfunction Indicator Lamp (MIL)
MALFUNCTION INDICATOR LAMPThe (MIL) Malfunction Indicator Lamp is on the instrument panel. The MIL has the following functions:
^ The MIL informs the driver that a fault that affects the emission levels of the vehicle has occurred. The owner should take the vehicle in for service as soon as possible.
^ As a bulb and system check, the MIL (Malfunction Indicator Lamp) comes ON with the key ON and the engine not running. When the engine is started, the MIL turns OFF if no DTCs are set.
When the MIL remains ON while the engine is running, or when a malfunction is suspected due to a driveability or emissions problem, perform an On-Board Diagnostic (OBD) System Check. Testing and Inspection
The procedures for these checks are given in engine controls. These checks expose faults which the technician may not detect if other diagnostics are performed first.
INTERMITTENT MALFUNCTION INDICATOR LAMP
In the case of an intermittent fault, the MIL (Malfunction Indicator Lamp) may illuminate and then after 3 trips turn OFF. However, the corresponding diagnostic trouble code will store in the memory. When unexpected diagnostic trouble codes appear, check for an intermittent malfunction.