Glow Plug/Controller
WARNING: This page does not describe the selected car, but rather 6 other vehicles, including the 2009 GMC Savana Special, 2009 GMC Savana Camper Special, 2009 GMC Savana, 2009 Chevrolet RV Cutaway, and 2009 Chevrolet Cutaway. However, it is still accessible from the selected car via links, so may be relevant.
The glow plug controller is a solid state device which operates the glow plugs. The glow plug controller is connected to the following circuits:
- The fuel heater ignition 1 voltage circuit
- The battery voltage circuit
- The CAN communication circuit located between the engine control module (ECM) and the glow plug controller
- The engine ground circuit
- The glow plug supply voltage circuits located between the glow plug controller and the glow plugs.
The glow plug diagnostic circuits are directly monitored individually by using a separate transistor to control current to each glow plug. Individual diagnosis is thus possible for every glow plug.