Malfunction Indicator Lamp (MIL), significance
WARNING: This page is about a different variant/trim than selected.
Checking MIL (through m.y.1999)
→ Malfunction Indicator Lamp (MIL) (through m.y. 1999), checking
Checking MIL (from m.y. 2000)
→ Malfunction Indicator Lamp (MIL) (from m.y. 2000), checking
If malfunctions are recognized by the Motronic Engine Control Module (ECM) J220 , the Malfunction Indicator Lamp (MIL) will be switched on. In vehicles from m.y. 2000, this is done by a signal sent by the ECM to the instrument cluster
Location of Malfunction Indicator Lamp (MIL)
NOTE:
- The MIL can switch on in the "flashing" or "permanently on" mode. DTC memory must be checked in every case → Diagnostic Trouble Code (DTC) memory, checking and erasing (scan tool functions 02 and 05) .
- Flashing: There is a malfunction which can cause damage to the Three Way Catalytic Converter (TWC) if driven in this condition. In this case, the vehicle must not be driven using full performance!
- Permanently on: There is a malfunction which will increase exhaust emissions. Check DTC memory of the Motronic ECM and/or Automatic Transmission Control Module (TCM).
- If the MIL does not light up even though there is an engine running problem, or a customer has complained, DTC memory must be checked, because malfunctions which do not switch the MIL on immediately can also be stored.