Control Modules In The Control Area Network (Can)

Fig 1: Identifying Control Modules In Control Area Network (CAN)

Courtesy of VOLVO CARS CORPORATION

The number of control modules in the CAN varies depending on the level of equipment, the vehicle model and the structure week.

NOTE:

To troubleshoot respective CAN-net, see troubleshooting for CAN-related diagnostic trouble codes for Central electronic module (CEM). For example, choose CEM-U000100/CEM-U000111/CEM-U000112/CEM-U000188 (HS CAN) or CEM-U001000/CEM-U001011/CEM-U001012/CEM-U001088 (MS/LS-CAN).

EXPLANATION

MS CAN	=	CAN Middle-speed section (125 kbit/s). In practise, includes control modules placed between passenger compartment and cargo compartment.
HS CAN	=	CAN High speed section (500 kbit/s). Contains the control modules located in the engine compartment.
Slave control module	=	A control module with low computing power which is connected to a "master control module" and which only operates on commands from the master control module.
Option	=	Accessories installed at the factory to order, when purchasing a new car.
Accessories	=	Aftermarket installation.

Control module	Name/ Function	Net	Miscellaneous
BCM	Brake control module (BCM) Controls the brake system ABS/EBD/STC/DSTC functions.	HS CAN	Has body sensor cluster (BSC) as a slave control module. Does not apply to S60 (11-), V60 (11-).
CCM	Climate control module (CCM) Controls the climate control system functions and communicates with the other modules via the network middle-speed sector.	MS CAN
CEM	Central electronic module (CEM) Is the network main control module and the interface between the high and middle-speed sides. The control module has an overall function in the electrical system. The control module has terminating resistor for HS and MS CAN.	HS CAN/ MS CAN
CPM	Combustion preheater module (CPM) Controls the parking heater function.	MS CAN	Option /accessory. Market dependent
CVM	Closing velocity module Control the function for.	HS CAN	XC60 only.
DDM	Driver door module (DDM) Controls the driver's door functions and certain functions in the other doors.	MS CAN
DEM	Differential electronic module (DEM) Controls four wheel drive engagement and communicates with the other modules via the high speed side of the network.	HS CAN	Applies to vehicles with all-wheel drive (AWD) only
DIM	Driver information module (DIM) Controls combined instrument panel functions. The control module contains one of the two terminal resistors for MS CAN.	MS CAN
ECM	Engine control module (ECM) Controls the engine functions. The control module contains one of two terminal resistors for HS CAN.	HS CAN	Different versions depending on the engine alternative.
FSM	Forward Sensing Module (FSM) The control functions for front park assistance and automatic cruise control.	HS CAN	Has forward facing radar as slave control module.
HCM	Headlamp Control Module (HCM) Controls the functions for the headlamps.	HS CAN	Different control modules depending on whether the vehicle is equipped with GDL or Halogen lamps.
HLDF	High Level Display Front (HLDF) Display screen for navigation system.	MS CAN
ICM	Infotainment control module (ICM) Controls audio and navigation functions. The control module is also the main control module in the MOST network.	MS CAN (MOST)
KVM	Keyless vehicle module (KVM) Controls functions for the keyless entry system.	MS CAN	Option
PAM	Parking Assistance Module (PAM) Controls functions for the parking assistance system.	MS CAN	Option /accessory
PBM	Park Brake Module (PBM) Controls the function for electric parking brake.	HS CAN
PDM	Passenger door module (PDM) Controls functions in the passenger side door.	MS CAN
PHM	Phone module (PHM) Controls phone functions. Part of the infotainment system.	MS CAN (MOST)	Option /accessory. Available in various configurations.
POT	Power Operated Tailgate Module (POT) Controls hydraulic opening and closing of the tailgate.	MS CAN	Not S80.
PSM	Power seat module (PSM) Controls the positions and functions of the driver's seat.	MS CAN	Standard/ option NOTE: The power seat module (PSM) does not check the seat heating and SIPS-airbag's function.
SRS	Supplemental restraint system module (SRS) Controls the vehicle's collision safety system.	MS CAN	Has Occupant weight sensor (OWS) (only USA/CAN/MAX) as slave control module, to check if anybody is sitting in the passenger seat.
Steering angle sensor	Steering wheel angle sensor module (SAS) Transfers the position of the steering wheel out on the controller area network (CAN). Included as part of the stability and traction control function.	HS CAN	Are located in and supplied with power by the Steering wheel module (SWM).
SUM	Suspension module (SUM) Controls the function for continuous control of shock absorber damping.	HS CAN	Option
TCM	Transmission control module (TCM) Controls the automatic transmission function.	HS CAN	Vehicles with automatic transmission only.
TRM	Trailer module (TRM) Controls trailer functions.	MS CAN	Option Only for vehicles with tow hitches.