Combustion PREHEATER Module (CPM): Design: Heater
The heater has the following internal electrical components:
- control module
- combustion air fan motor
- glow plug
- coolant temperature sensor
- overheating sensor
External electrical components:
- Coolant pump
- fuel pump
- remote start device (accessory)
There are 6 connectors above the control module. 3 of these are accessible from outside and are for connection to the vehicle, coolant pump and fuel pump. The other 3 are under a plastic cover and are for internal electrical components. The fan motor is directly connected to the control module circuit board with 2 pins.