•  The glow system consists of one pencil-type glow plug per combustion chamber, a glow relay, the PCM and a glow plug indicator light and the corresponding electrical connections.

•  The glow relay and the glow plug indicator light are actuated by the PCM.

•  The PCM receives information on the current coolant temperature from the engine coolant temperature (ECT) sensor.

•  The PCM controls the quick glow and after glow phases, using the engine coolant temperature and engine speed as control parameters.

•  The after glow phase begins after the engine has started. After approx. 30 s, the glow plugs are switched off by the PCM.

•  The pencil-type glow plugs are also shut off if the engine speed reaches 2,500 rpm.

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