Control Module

The primary task of the combustion preheater module (CPM) is to manage the functions for:

• engine coolant heater
• parking heater
• remote start
• remote start of parking heater via Phone module (PHM) (option, from and incl. structure week 201020)

The electrical engine block heater is managed by the accessory electronic module (AEM).

The same control module is used for both the engine coolant heater and the parking heater. Depending on the vehicle configuration, the heater can function as an engine coolant heater or as a parking heater. The heater, which uses radiant heat, is not capable of maintaining a comfortable passenger compartment temperature.

The combustion preheater module (CPM) is positioned on the right-hand side of the engine compartment.

The combustion preheater module (CPM) communicates both with directly connected components and with other control modules via CAN communication.

The control module checks activations that are made, and the input and output signals through integrated diagnostics. A diagnostic trouble code is generated if the control module detects a fault. Any diagnostic trouble codes are stored in the control module memory. The information can be read off using VIDA (Volvo scan tool).

A simple way to check that the combustion preheater module (CPM) is supplied with power is to activate the heater. Listen if the heater starts. It can be activated using:

• the control stalk on vehicles with a parking heater