Malfunction Indicator Lamp (MIL): Notes
WARNING: This page does not describe the selected car, but rather 8 other vehicles, including the 1999 Volkswagen Jetta, 1999 Volkswagen GTI, 1998 Volkswagen Jetta, 1998 Volkswagen GTI, and 1997 Volkswagen Jetta. However, it is still accessible from the selected car via links, so may be relevant.
If malfunctions are recognized and verified by the engine control module, they will be indicated by switching on the MIL.
Location of Malfunction Indicator Lamp (MIL).
NOTE:
The MIL can be switched on in the flashing or permanently on mode. The Diagnostic Trouble Code (DTC) memory must be checked in every case: see CHECK DTC MEMORY (SCAN TOOL FUNCTION 02)
.
- Flashing: There is a malfunction that can damage the Three Way Catalytic Converter (TWC) if driven in this condition. In this case, the vehicle must not be driven using wide open throttle, but with partial throttle only, during which the MIL is continuously illuminated rather than flashing.
- Permanently on: There is a malfunction which will increase exhaust emissions. Check engine and/or automatic transmission control modules.
- If the MIL does not light up: If there is an engine running problem, or a customer complaint of one, perform a functional check of the MIL. Then DTC memory must be checked because malfunctions that do not switch on the MIL immediately can also be stored.