Glow Plug Control Modules
The glow plug control modules is located on a bracket on the right front of the engine compartment. Each glow plug control module controls three glow plugs in each engine bank.
There are three phases of glow plug heating:
- Pre heating
- Crank heating
- Post heating.
The Powertrain Control Module (PCM) determines the power levels for each phase and heating times from the coolant temperature.
When the stop/start switch is operated to start the engine, the PCM calculates any required heating times. If heating is required, the PCM sends a Local Interconnect Network (LIN) bus signal to the glow plug control modules. The glow plug control modules energize the glow plugs with the required power levels. If required by the PCM, the glow plug control modules keep the glow plugs energized during cranking and for the duration of any post heating phase.
The glow plug control modules monitor the drive circuit of the glow plugs for plausibility of operation, continuity, and short and open circuits. If a fault is detected, the glow plug control modules send a signal to the PCM, which then stores a related Diagnostic Trouble Code (DTC).
For additional information, refer to: GLOW PLUG SYSTEM