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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
Engine torque, current Nm TCM
Key position, ignition switch Lock Off On Start CIM
Total expected current consumption 0-150A CIM
Outside temperature, high resolution Degrees C CIM
Automatic, selector lever position P, R, N, D, M, movement in progress TCM
Transmission, emission related fault active On/Off TCM
ABS active On/Off TCS/ESP
ABS out of order On/Off TCS/ESP
ESP active On/Off TCS/ESP
Wheel speed, diagnosis ready On/Off TCS/ESP
Wheel speed, front left rpm TCS/ESP
Wheel speed, rear left rpm TCS/ESP
Wheel speed, front right rpm TCS/ESP
Wheel speed, rear right rpm TCS/ESP
Wheel revolutions, front left revs TCS/ESP
Wheel revolutions, rear left revs TCS/ESP
Wheel revolutions, front right revs TCS/ESP
Wheel revolutions, rear right revs TCS/ESP
TCS active On/Off TCS/ESP
TCS available On/Off TCS/ESP
TCS allowed On/Off TCS/ESP
TCS out of order On/Off TCS/ESP
Traction Control, torque request Nm TCS/ESP
Traction Control, type of torque limitation request Off Increase torque Reduce torque TCS/ESP
Master brake cylinder pressure sensor, diagnosis ready On/Off TCS/ESP
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
Vehicle speed km/h BCM, DDM, DSM, ACC, ICM, MIU, SPA, PDM, PSM, RLDM, RRDM, ACM, SLM, SRM, STC, TPMM, UEC, AMP1, AMP2, CU, TCM
Brake pedal, switch active On/Off CIM, ICM, REC, ACM, SLM, AHL, TCS/ESP, TCM
Glow plug, indicator active On/Off MIU
Display text Missing
Cruise control active On/Off CIM, TCS/ESP
Cruise control allowed On/Off MIU, ACM
Prevent shifting, request On/Off TCM
Accelerator pedal, kickdown On/Off TCS/ESP, TCM
Accelerator pedal, position % ICM, ACM, TCS/ESP, TCM
Generator out of order On/Off CIM, ICM, MIU
Injected fuel quantity litres ICM, MIU
Clutch pedal, switch active On/Off CIM, TCS/ESP
Radiator fan, speed % CIM
Coolant temperature Degrees C BCM, CIM, ACC, ICM, MIU
Engine running Not running Running, idling Running, not idling AHM, BCM, CIM, DDM, ICM, MIU, SPA, PDM, PSM, REC, RRDM, ACM, SLM, UEC, TCS/ESP, CU
Engine, limp-home On/Off ICM, TCS/ESP, TCM
Engine braking, fuel cut-off active On/Off TCM
Engine torque, current Nm ICM, TCS/ESP, TCM
Engine torque, limitation failed On/Off TCS/ESP
Engine torque, request from TCS failed On/Off TCS/ESP
Engine torque, driver request Nm TCS/ESP, TCM
Engine torque, maximum Nm TCS/ESP
Engine oil, remaining life expectancy % ICM
Engine oil change now, indicator active On/Off ICM
Engine oil change imminent, indicator active On/Off ICM
Engine oil level, indicator active On/Off ICM, MIU
Engine type Z19 ACC
Engine speed rpm AHM, CIM, ICM, MIU, ACM, TCS/ESP, TCM
Level sensor, fuel 0-255 MIU
Service Engine, non-emission related, request On/Off ICM
Depress brake pedal, indicator active On/Off ICM
Road distance, rear right wheel Metres ICM, MIU, PSM
Road distance, rear left wheel Metres ICM, MIU, SPA, PDM
Shifting pattern to prevent engine jarring, request On/Off TCM