W 3500 L4-5.2L DSL Turbo (2006)
Glow Plug Control Module: Description and Operation
Glow Plug Controller Description (12,000lbs GVW)
The glow control system consists of the engine control module (ECM), the glow plug controller, glow plugs and the glow indicator lamp. The glow
control system is operated when the engine coolant temperature is low, which allows for easier engine starting.
If the ignition switch is turned ON when the engine coolant temperature is low, the ECM illuminates the glow indicator lamp and turns ON the glow
plugs via the glow plug controller. After a fixed time passes, the ECM turns OFF the glow indicator lamp and the glow plugs via the glow plug
controller.
The glow plug controller has the ability to perform internal diagnostics for voltage and output state checks of the glow plugs. The glow plug controller
will send an error message to the ECM via the controller area network (CAN) communication bus.
