Let's try to have them all here
Most are from the official Volvo abbreviations page (thanks @R1maS) and this post, but adding new ones as we find. Use this thread to add new ones or modules that you don't know so we can search.
ABS Anti-lock Brake System module
ACCM Air Conditioning Control Module
ACM Alternator Control Module
ADM Additive Dosing Module
AEEM Automatic engine fixing module
AEM Accessory Electronic Module
AFM AM/FM Tuner Module
AGM Active Grille shutter Module
AHCM Additional Heater Control Module
ASM Air Suspension Module
ATCM All Terrain Control Module
ATM Control module antenna (Antenna Module)
AUD Control module audio (Audio Module)
AUM Control module audio (Audio Module)
AUU Accessory USB unit module
BAM Bluetooth Access Module
BCM Brake Control Module
BDM Battery Disconnect Module
BECM Battery Energy Control Module
BMM Battery Management Module
BPM Bluetooth Phone Module
CCM Climate Control Module
CDM Central Display Module
CEM Central Electronic Module
CFCM Cooling Fan Control Module
CFM Climate Fan Module
CPM Control module auxiliary heater (Combustion Preheater Module)
CRM Control module convertible roof (Convertible Roof Module)
CSM Center Stack Module
CVM Closing Velocity Module
DABM Digital Audio Broadcast Module
DCDC DC converter control module
DCM Distance Control Module
DDM Control module driver door (Driver Door Module)
DEF Defroster Control Module
DEM Control module four-wheel drive (Differential Electronic Module)
DIM Combination instrument (Driver Information Module)
DMM Control module damper motor (Damper Motor Module)
DMTL Diagnostic Module Tank Leakage
ECM Engine Control Module
EGSM Electronic gear selector module
EPS Electrical Power Steering Module
ESM Exterior Sound Module
ETM Control module throttle damper (Electronic Throttle Module)
FACM Fuel Additive Control Module
FCM Fan Control Module
FSM Forward Sensing Module
FTM Fuel Tank Module
GDL Gas Discharge Lamp Module
GDM Graphic Display Module
GPS Global Positioning System Module
GSM Gear Selector Module
HCM Headlamp Control Module
HCML Left headlamp control module
HCMR Right headlamp control module
HLDF High display front module
IAM Integrated Audio Module
ICM Infotainment Control Module
IEM Inverter ERAD Module
IGM Inverter Generator Module
IKM Ignition Key Module
ILM Interior Light Module
ISM Inclination Sensor Module
KVM Keyless Vehicle Module
LCM Left Camera Module
LDM Left Rear Door Module
LSM Light Switch Module
MMM Multi Media Module
MMS Mass Movement Sensor module
MP1 MD Player Module
MP2 CD Player Module
MPM Media Player Module
NRCM NOx reduction control module
NVM Night Vision Module
OBC On-board charger module
OHC Overhead console module
PAC Parking assist camera module
PAM Parking Assistance Module
PBM Parking Brake Module
PDM Passenger Door Module
PEM Pump Electronic Module
PHM Phone Module
POT Power Operated Tailgate Module
PPM Pedestrian Protection Module
PSCM Power Steering Control Module
PSL Power Seat Module, Left
PSM Power Seat Module
PSMD Driver seat electric seat module
PSMP Passenger electric seat module
PSR Power Seat Module, Right
PSR Power Sustain Module
RCCM Rear Climate Control Module
RCM Right Camera Module
RCM Reverse Camera Module
RDM Right Rear Door Module
REC Recirculation Control Module
REM Rear Electronic Module
RML Constraint module left
RMR Constraint module right
RPDM Rear Passenger Door Module
RRW Run off Road Warning Module
RRX Remote Receiver Module
RSE Rear Seat Entertainment Module
RSM Rain Sensor Module
RTI Road Traffic Information Module
SAS Steering Wheel Angle Sensor Module
SCL Steering Column Lock Module
SCM Siren Control Module
SCMC Seat Control Module C
SHM Seat Heating Module
SHML Seat Heating Module Left
SHMR Seat Heating Module Right
SIM Subscriber Identity Module
SMM Stepper Motor Module
SODL Side Object Detection control module Left
SODR Side Object Detection control module Right
SPMA Seatbelt Pretensioner Module A
SPMB Seatbelt Pretensioner Module B
SRM Sun Roof Module
SRS Supplementary Restraint System Module
SUB Subwoofer Module
SUM Suspension Module
SWM Steering Wheel Module
TACM Transmission brake control module
TCM Transmission Control Module
TEM Telematics Electronic Module
TMC Traffic Message Channel module
TRM Trailer Module
TVM Television Module
UEM Upper Electronic Module
VCM Vehicle wiring module
VCM Vehicle connection module
WAM Wide-angle vision module
WMM Wiper Motor Module
WPC Wireless phone charger module
Most are from the official Volvo abbreviations page (thanks @R1maS) and this post, but adding new ones as we find. Use this thread to add new ones or modules that you don't know so we can search.
ABS Anti-lock Brake System module
ACCM Air Conditioning Control Module
ACM Alternator Control Module
ADM Additive Dosing Module
AEEM Automatic engine fixing module
AEM Accessory Electronic Module
AFM AM/FM Tuner Module
AGM Active Grille shutter Module
AHCM Additional Heater Control Module
ASM Air Suspension Module
ATCM All Terrain Control Module
ATM Control module antenna (Antenna Module)
AUD Control module audio (Audio Module)
AUM Control module audio (Audio Module)
AUU Accessory USB unit module
BAM Bluetooth Access Module
BCM Brake Control Module
BDM Battery Disconnect Module
BECM Battery Energy Control Module
BMM Battery Management Module
BPM Bluetooth Phone Module
CCM Climate Control Module
CDM Central Display Module
CEM Central Electronic Module
CFCM Cooling Fan Control Module
CFM Climate Fan Module
CPM Control module auxiliary heater (Combustion Preheater Module)
CRM Control module convertible roof (Convertible Roof Module)
CSM Center Stack Module
CVM Closing Velocity Module
DABM Digital Audio Broadcast Module
DCDC DC converter control module
DCM Distance Control Module
DDM Control module driver door (Driver Door Module)
DEF Defroster Control Module
DEM Control module four-wheel drive (Differential Electronic Module)
DIM Combination instrument (Driver Information Module)
DMM Control module damper motor (Damper Motor Module)
DMTL Diagnostic Module Tank Leakage
ECM Engine Control Module
EGSM Electronic gear selector module
EPS Electrical Power Steering Module
ESM Exterior Sound Module
ETM Control module throttle damper (Electronic Throttle Module)
FACM Fuel Additive Control Module
FCM Fan Control Module
FSM Forward Sensing Module
FTM Fuel Tank Module
GDL Gas Discharge Lamp Module
GDM Graphic Display Module
GPS Global Positioning System Module
GSM Gear Selector Module
HCM Headlamp Control Module
HCML Left headlamp control module
HCMR Right headlamp control module
HLDF High display front module
IAM Integrated Audio Module
ICM Infotainment Control Module
IEM Inverter ERAD Module
IGM Inverter Generator Module
IKM Ignition Key Module
ILM Interior Light Module
ISM Inclination Sensor Module
KVM Keyless Vehicle Module
LCM Left Camera Module
LDM Left Rear Door Module
LSM Light Switch Module
MMM Multi Media Module
MMS Mass Movement Sensor module
MP1 MD Player Module
MP2 CD Player Module
MPM Media Player Module
NRCM NOx reduction control module
NVM Night Vision Module
OBC On-board charger module
OHC Overhead console module
PAC Parking assist camera module
PAM Parking Assistance Module
PBM Parking Brake Module
PDM Passenger Door Module
PEM Pump Electronic Module
PHM Phone Module
POT Power Operated Tailgate Module
PPM Pedestrian Protection Module
PSCM Power Steering Control Module
PSL Power Seat Module, Left
PSM Power Seat Module
PSMD Driver seat electric seat module
PSMP Passenger electric seat module
PSR Power Seat Module, Right
PSR Power Sustain Module
RCCM Rear Climate Control Module
RCM Right Camera Module
RCM Reverse Camera Module
RDM Right Rear Door Module
REC Recirculation Control Module
REM Rear Electronic Module
RML Constraint module left
RMR Constraint module right
RPDM Rear Passenger Door Module
RRW Run off Road Warning Module
RRX Remote Receiver Module
RSE Rear Seat Entertainment Module
RSM Rain Sensor Module
RTI Road Traffic Information Module
SAS Steering Wheel Angle Sensor Module
SCL Steering Column Lock Module
SCM Siren Control Module
SCMC Seat Control Module C
SHM Seat Heating Module
SHML Seat Heating Module Left
SHMR Seat Heating Module Right
SIM Subscriber Identity Module
SMM Stepper Motor Module
SODL Side Object Detection control module Left
SODR Side Object Detection control module Right
SPMA Seatbelt Pretensioner Module A
SPMB Seatbelt Pretensioner Module B
SRM Sun Roof Module
SRS Supplementary Restraint System Module
SUB Subwoofer Module
SUM Suspension Module
SWM Steering Wheel Module
TACM Transmission brake control module
TCM Transmission Control Module
TEM Telematics Electronic Module
TMC Traffic Message Channel module
TRM Trailer Module
TVM Television Module
UEM Upper Electronic Module
VCM Vehicle wiring module
VCM Vehicle connection module
WAM Wide-angle vision module
WMM Wiper Motor Module
WPC Wireless phone charger module
