With Generic Scan Tool

Malfunction Indicator Lamp (MIL) -K83- In Instrument Cluster

If the ECM recognizes malfunctions that lead to a worsening of emissions values, it indicates them by lighting the Malfunction Indicator Lamp (MIL) -K83- in the instrument cluster.

Function
After ignition is switched on, Engine Control Module (ECM) switches on the Malfunction Indicator Lamp (MIL) -K83-. Shortly after engine is started, Malfunction Indicator Lamp (MIL) -K83- goes out if, first of all, Engine Control Module (ECM) does not detect a malfunction that worsens the emissions values and, secondly, activation of the lamp by the Engine Control Module (ECM) is OK.

Malfunction messages
If malfunctions that worsen emissions are recognized during operation of the engine, Engine Control Module (ECM) switches on Malfunction Indicator Lamp (MIL) -K83-. An entry is made in DTC memory of ECM at the same time.

Malfunction Indicator Lamp (MIL) -K83- can blink or remain lit continuously. In any case the DTC memory must be checked see "Mode 3: Check DTC memory" and erased if necessary see "Mode 4: Reset/erase diagnostic data". Mode 3: Check DTC Memory Mode 4: Reset/Erase Diagnostic Data

Continuously lit:
There is a malfunction that causes increased emissions values. DTC memory of Engine Control Module (ECM) must be checked.

Blinking:
There is a malfunction that causes damage to the catalytic converter in this driving condition (e.g. combustion misfire). In this case, vehicle must only be driven at reduced performance.

NOTE: If there is a driveability problem or a customer complaint and Malfunction Indicator Lamp (MIL) -K83- does not light up, DTC memory must be checked. There may be DTCs stored that do not cause the exhaust MIL to light up immediately, but only after engine is started again and malfunction is recognized again.

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

- Start engine.
- Shortly after engine is started, Malfunction Indicator Lamp (MIL) -K83- goes out if there are no exhaust-relevant malfunctions stored in DTC memory

NOTE: The switch-on signal for Malfunction Indicator Lamp (MIL) is transferred from the Engine Control Module (ECM) to the instrument cluster via CAN-Bus. Check terminal resistance for CAN-Bus. Terminal Resistance For CAN-Bus, Checking