Glow Plugs

Glow plugs are used during cold starts to preheat swirl chambers. The system is switched "ON" when the key switch is turned to position "2". Preheating time depends on a coolant temperature switch connected to time circuit in the glow plug relay. Glow plugs remain on approximately 10-25 seconds after instrument panel indicator light has gone out.

Glow plugs operate when starter motor is rotating (key position "3") and cut when engine starts and start key is released back to position "2". To repeat starting attempt, key switch must first be returned to position "1". A blocking relay is incorporated in the system to interrupt electrical circuit between the control unit and glow plug relay when alternator starts charging. Automatic cold starting devices are also incorporated into the injection pump to assist starting by advancing injection timing.