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Engine management, bus information

Engine management, bus information

The engine management system uses the following information:

Bus message Unit Sent by
A/C compressor, request On/Off ACC
A/C compressor, request On/Off BCM
A/C idling speed increase, request On/Off BCM
Outside temperature, corrected value Degrees C BCM
Cruise control, Cancel active On/Off CIM
Cruise control, button fault On/Off CIM
Cruise control, On active On/Off CIM
Cruise control, Resume active On/Off CIM
Cruise control, Set active On/Off CIM
Immobilisation information Missing CIM
Lowest increase in idling speed depending on current consumption Level 0-3 CIM
Key position, ignition switch Lock Off On Start CIM
Total expected current consumption 0-150A CIM
Outside temperature, high resolution Degrees C CIM
ABS active On/Off TC/ABS/ESP
ABS out of order On/Off TC/ABS/ESP
ESP active On/Off TC/ABS/ESP
Wheel speed, diagnosis ready On/Off TC/ABS/ESP
Wheel speed, front left rpm TC/ABS/ESP
Wheel speed, rear left rpm TC/ABS/ESP
Wheel speed, front right rpm TC/ABS/ESP
Wheel speed, rear right rpm TC/ABS/ESP
Wheel revolutions, front left revs TC/ABS/ESP
Wheel revolutions, rear left revs TC/ABS/ESP
Wheel revolutions, front right revs TC/ABS/ESP
Wheel revolutions, rear right revs TC/ABS/ESP
TCS active On/Off TC/ABS/ESP
TCS available On/Off TC/ABS/ESP
TCS allowed On/Off TC/ABS/ESP
TCS out of order On/Off TC/ABS/ESP
Traction Control, torque request Nm TC/ABS/ESP
Traction Control, type of torque limitation request Off Increase torque Reduce torque TC/ABS/ESP
Master brake cylinder pressure sensor, diagnosis ready On/Off TC/ABS/ESP
Automatic, current gear R, N, 1, 2, 3, 4, 5 Shifting in progress TCM
Automatic, winter mode status On/Off TCM
Automatic, selector lever position P, R, N, D, M Movement in progress TCM
Radiator fan, speed request % TCM
Torque converter status Disengaged Engaged Engaging Disengaging TCM
Engine braking, torque converter slip request Off Prevents fuel shut-off Requests fuel shut-off TCM
Service Automatic, indicator active On/Off TCM
TCM, torque request Nm TCM
TCM, type of torque limitation request Off Increase torque Reduce torque TCM
Transmission overheating, indicator active On/Off TCM
Transmission, emission related fault active On/Off TCM
Transmission, emission related fault code stored On/Off TCM
Transmission, output shaft speed rpm TCM
Transmission, limp-home On/Off TCM
Transmission, oil temperature deg C TCM
Transmission, gear ratio 1:0-1:8 TCM
Transmission, shift direction No gear shift Shift up in progress Shift down in progress TCM
Shifting pattern for catalytic converter ignition, status On/Off TCM
Manual gearbox, reverse On/Off UEC


The engine management system sends the following information:

Bus message Unit Receiver
A/C pressure kPa ACC
A/C compressor, clutch active On/Off ACC
A/C disengaged, indicator active On/Off
Atmospheric pressure kPa TCM
Vehicle speed km/h BCM, DDM, DSM, ACC, MIU, SPA, PDM, PSM, RLDM, RRDM, ACM, SLM, SRM, STC, TPMM, UEC, TCM, AMP1, AMP2, CU
Brake pedal, switch active On/Off CIM, MIU, REC, ACM, SLM, AHL, TCM, TC/ABS/ESP
Display text Missing
Cruise control active On/Off CIM, TCM, TC/ABS/ESP
Cruise control allowed On/Off MIU, ACM
Prevent shifting, request On/Off TCM
Accelerator pedal, speed % / ms TCM
Accelerator pedal, kickdown On/Off TCM, TC/ABS/ESP
Accelerator pedal, position % MIU, ACM, TCM, TC/ABS/ESP
Generator out of order On/Off CIM, MIU
Injected fuel quantity litres MIU
Intake air temperature deg C TCM
Check fuel filler flap, B130 indicator active On/Off MIU
Clutch pedal, switch active On/Off CIM, TCM, TC/ABS/ESP
Radiator fan, speed % CIM
Coolant temperature Degrees C BCM, CIM, ACC, MIU, TCM
Turbo gauge % MIU
Engine running Not running Running, idling Running, not idling AHM, BCM, CIM, DDM, MIU, SPA, PDM, PSM, REC, RRDM, ACM, SLM, UEC, TCM, TC/ABS/ESP, CU
Engine, limp-home On/Off MIU, TCM, TC/ABS/ESP
Engine, heating cycle (OBD) ready On/Off TCM
Engine braking, fuel shut-off active On/Off TCM
Engine braking, torque converter slip. Status Allowed/Not allowed TCM
Engine torque, current Nm MIU, TCM, TC/ABS/ESP
Engine torque, limitation failed On/Off TCM, TC/ABS/ESP
Engine torque, request from TCM failed On/Off TCM
Engine torque, request from TCS failed On/Off TC/ABS/ESP
Engine torque, driver request Nm TCM, TC/ABS/ESP
Engine torque, maximum Nm TC/ABS/ESP
Engine oil, remaining life expectancy % MIU
Engine oil change now, indicator active On/Off MIU
Engine oil change imminent, indicator active On/Off MIU
Engine oil level, indicator active On/Off MIU, MIU, TCM
Engine type B207R B207L B207E ACC
Engine speed rpm AHM, CIM, MIU, ACM, TCM, TC/ABS/ESP
Level sensor, fuel 0-255 MIU
Service Engine, non-emission related, request On/Off MIU, ACM, TCM
Shift up On/Off MIU
Throttle position % TCM, TC/ABS/ESP
Depress brake pedal, indicator active On/Off MIU
Road distance, rear right wheel Metres MIU, PSM
Road distance, rear left wheel Metres MIU, SPA, PDM, TCM
Transmission, emission related fault active On/Off TCM
Shifting pattern to prevent engine jarring, request On/Off TCM
Shifting pattern for catalytic converter ignition, request On/Off TCM
Shifting pattern for low engine torque, request On/Off TCM