Malfunction Indicator Lamp (MIL) Function, Checking

Malfunction Indicator Lamp (MIL) function, checking - 5 Spd. Automatic Transmission 01V

If emissions malfunctions are recognized by the TCM, the Malfunction Indicator Lamp (MIL) will be switched on.





Location of the MIL: integrated in speedometer in instrument cluster

Note:
When the MIL is switched on, it will either blink or light continuously. The D TC memory for the TCM must be checked.

^ MIL flashing: there is a malfunction that could damage the Three Way Catalytic Converter (TWC). In this case, drive only with reduced power.
^ MIL continuously on: there is a malfunction that degrades emissions. Check DTC memory of the Engine Control Module (ECM) or the TCM.
^ If there are driveability problems (e.g. a customer complaint) and the MIL is not on, perform the MIL functional because malfunctions can be stored that do not switch the MIL on.

MIL functional check

- Switch ignition on: MIL must come on.

If the MIL does not come on when the ignition is switched on (with the engine not running): Check DTC memory. If necessary, check wiring per wiring diagram or replace light bulb.

- Start engine and let idle: MIL must switch off after several seconds.

If the MIL does not switch off after the engine is started: Check DTC memory.