Malfunction Lamp For on Board Diagnostic (OBD)/Malfunction Indicator Lamp (MIL) -K83- In Instrument Cluster

Malfunction Lamp For On Board Diagnostic (OBD)/Malfunction Indicator Lamp (MIL) -K83- In Instrument Cluster

If the ECM or TCM 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 switching on the ignition, the ECM switches on the Malfunction Indicator Lamp (MIL) -K83-. Shortly after engine is started, the Malfunction Indicator Lamp (MIL) -K83- will go out. This requires, that the Engine Control Module (ECM) or Transmission Control Module (TCM) does not detect a malfunction that worsens the emissions values and, secondly, that 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 vehicle, the ECM or TCM switches on the Malfunction Indicator Lamp (MIL) -K83-. An entry is made in DTC memory of ECM or TCM at the same time.

Malfunction Indicator Lamp (MIL) -K83- can be switched on to blinking or continuously lit. In any case the DTC memory must be checked and erased if necessary. Diagnostic Mode 03 - Read DTC Memory and Diagnostic Mode 04 - Erase DTC Memory

Continuously lit:
There is a malfunction that causes increased emissions values. DTC memory of Engine Control Module (ECM) and Transmission Control Module (TCM) 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 power.

NOTE: Check DTC memory of ECM or TCM if there is a driveability problem or a customer complaint, but the Malfunction Indicator Lamp (MIL) -K83- is not lit. 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.
- Warning lamp for On Board Diagnostic/Malfunction Indicator Lamp (MIL) -K83- must light up
- Start engine.
- Shortly after engine is started, the Malfunction Indicator Lamp (MIL) -K83- will go out if there are no malfunctions stored in DTC memory that relate to the E-gas system

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