Golf GL L4-2.0L (AEG) (2001)
Malfunction Indicator Lamp: Description and Operation
Malfunction Indicator Lamp (MIL), Operation
If malfunctions are recognized by the Motronic Engine Control Module (ECM) -J220- , the malfunctions will be indicated by turning on the Malfunction
Indicator Lamp (MIL). In vehicles from m.y. 2000, this is done by a signal from the ECM via the instrument cluster.
Location of Malfunction Indicator Lamp (MIL)
NOTE:
- The MIL can turn on in the "flashing" or "permanently on" mode. DTC memory must be checked in every case. Refer to "Displaying and Reading
Trouble Codes" under Powertrain Management/Computers and Control Systems See: Testing and Inspection
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Flashing:
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A malfunction exists that can damage the Three Way Catalytic Converter (TWC) if driven in this condition. In this case, do not drive the
vehicle using full performance!
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Permanently on:
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A malfunction exists that will increase exhaust emissions. Check DTC memory of the Motronic Engine Control Module (ECM) and/or
automatic Transmission Control Module (TCM).
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If the MIL does not light up even though there is an engine running condition, or a customer has complained, check the DTC memory, because
malfunctions that do not immediately turn on the MIL can also be stored.