With Manufacturer's Scan Tool

Malfunction Indicator Lamp (MIL) -K83-, Significance

Checking MIL
If malfunctions are recognized by the Motronic Engine Control Module (ECM) -J220-, they will be indicated by switching on the Malfunction Indicator Lamp (MIL) -K83-.

Location of Malfunction Indicator Lamp (MIL) -K83-






NOTE: Malfunction Indicator Lamp (MIL) -K83- can switch on in the flashing or permanently on mode. The Diagnostic Trouble Code (DTC) memory must be checked in every case. Reading Diagnostic Trouble Codes

- Flashing: there is a malfunction which can cause damage to 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 Motronic and/or automatic transmission control modules.
- If the Malfunction Indicator Lamp (MIL) -K83- does not light up, even though there is an engine running problem, or a customer has complained, the DTC memory must be checked, because malfunctions which do not switch the Malfunction Indicator Lamp (MIL) -K83- on immediately can also be stored.

Test conditions






- All fuses must be OK
- The battery voltage must be at least 11.5 V

Functional check:

- Switch on ignition.
Malfunction Indicator Lamp (MIL) -K83- must light-up.

If the Malfunction Indicator Lamp (MIL) -K83- does not light-up with ignition switched on:
- Check instrument cluster and MIL lamp

If the Malfunction Indicator Lamp (MIL) -K83- lights-up with ignition switched on, continue check as follows:
- Start engine and run at idle speed.
The Malfunction Indicator Lamp (MIL) -K83- must go out after a few seconds.

If the Malfunction Indicator Lamp (MIL) -K83- does not go out:
- Perform an automatic test sequence; if necessary, repair any malfunctions and then erase DTC memory. Reading Diagnostic Trouble Codes

- Read readiness code. If DTC memory has been erased or Motronic Engine Control Module (ECM) -J220- was disconnected from battery positive (B+), readiness code must be generated again. Monitors, Trips, Drive Cycles and Readiness Codes