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Home >> Volvo >> 2003 >> C70 2.3 53, Automatic >> Repair and Diagnosis >> External Pages >> Different car >> Section 98 (Ignition And Control Systems - Design And Function (Coupe)) >> Ignition And Control Systems Other Output Signals (B5234T3; B5254T; 1998) >> Combined Instrument Panel >> Malfunction Indicator Lamp (MIL)

Malfunction Indicator Lamp (MIL)

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The malfunction indicator lamp (MIL) is controlled by the engine control module (ECM). The automatic transmission control module (TCM) can also request that the malfunction indicator lamp (MIL) lights.

The malfunction indicator lamp (MIL) lights when the ignition is switched on but the engine is not running. This indicates that the lamp itself is working.

The malfunction indicator lamp (MIL) lights when the engine control module (ECM) has detected an emission-related fault. The malfunction indicator lamp (MIL) goes out is the engine control module (ECM) senses that the fault has disappeared.

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