Exhaust Malfunction Indicator Lamp (MIL), checking
WARNING: This page is about a different car, the 2006 Audi A4, 2005 Audi A4, 2004 Audi A4, 2003 Audi A4, and 2002 Audi A4. However, it is still accessible from the selected car via links, so may be relevant.
Function test of warning lamp
- Switch ignition on.
- Warning lamp for On Board Diagnostic (Malfunction Indicator Lamp -MIL-) must light up
- Start engine.
- Shortly after engine is started, the Malfunction Indicator Lamp (MIL) will go out if there are no malfunctions stored in the DTC memory that relate to the emissions system
NOTE:
The switch-on signal for the Malfunction Indicator Lamp (MIL) is transferred from the Engine Control Module (ECM) to the instrument cluster via CAN-bus. Check data exchange between the Engine Control Module (ECM) and other CAN capable control modules. Refer to
Data exchange between engine control module and other CAN-control modules, checking