Glow Plug System

With the ignition switch in the "START" or "RUN" position, power flows to the glow plugs from the control module. With the engine coolant temperature below 158°F (70°C), the "Wait-to-Start" indicator will turn off, depending on engine coolant temperature. The engine can then be started.

The glow plugs continue to heat up during engine start and for a short time after the engine starts depending on coolant temperature.

If the engine is started before the "Wait-to-Start" indicator turns off, the glow plugs will continue to heat up after the engine is started. The glow plug control module has a built-in timing circuit which will turn off the glow plugs 8-13 seconds after the "Wait-to-Start" indicator turns off, if the engine has not been started. If the engine is started after this time period, the glow plugs will heat up while the engine is being started.