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Home >> Volvo >> 2004 >> S40 LSE >> Repair and Diagnosis (Single Page) >> Transmission >> Automatic Trans >> Battery, Brakes, Central Electronic Module (CEM), Climate Units, Engine Management System (Ems), Diagnosis - Design And Function (644 Body) >> Central Electronic Module (CEM) (2000-2004) >> Wiper Functions >> Glow plug monitor
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Glow plug monitor

When the key is in positions 2 or 3, the Central electronic module (CEM) controls the brake lights with regards to any problems.

The control light in the combination instrument lights up for 3 seconds and goes off even if the brake is not applied. Should a problem occur, the control lights light up and stay on when the brake is applied.

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