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Home >> Audi >> 2001 >> A4 Base, 1.8 C, Automatic >> Repair and Diagnosis >> Engine Performance >> System >> Engine Controls - Self-Diagnostics - 1.8L Turbo >> Malfunction Indicator Light >> Malfunction Indicator Light Check

Malfunction Indicator Light Check

NOTE: When ECM memory is cleared, battery voltage is disconnected or ECM is disconnected it is necessary to generate a ECM readiness code. See READINESS CODE  under SELF-DIAGNOSTIC SYSTEM.
NOTE: Malfunction Indicator Light (MIL) check should only be performed if MIL is on continuously and no DTCs are stored, or MIL never illuminates.

MIL switch-on signal from ECM is sent to instrument cluster through CAN-bus system. If MIL functions are suspect, repair as necessary. See DATA TRANSFER BETWEEN ENGINE CONTROL MODULE AND CAN-BUS CAPABLE CONTROL MODULES .

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