|
Bus message
|
Unit
|
Transmitter
|
User
|
Description
|
|
Sentronic, gear change request
|
None, up, down
|
SCM
|
TCM
|
SCM reads the voltage value of the resistive multiplexed gear selector switch and sends the information further on the bus. When the gear selector is in position M, TCM will use the value to change gear manually
|
|
ABS active
|
On/Off
|
TCS/ESP
|
TCM
|
Used to inform TCM during ABS modulation, risk of rapid speed changes
|
|
ESP active
|
On/Off
|
TCS/ESP
|
TCM
|
Used to inform TCM during ABS modulation, risk of rapid speed changes
|
|
Wheel speed front left
|
rpm
|
TCS/ESP
|
TCM
|
Used as reference speed value
|
|
Wheel speed front right
|
rpm
|
TCS/ESP
|
TCM
|
Used as reference speed value
|
|
Automatic selector lever position
|
P, R, N, D, M, Movement in progress
|
TCM
|
SLM, ECM
|
Used by SLM to turn on the segment in question in the gear selector coulisse
|
|
Selector lever in position M
|
On/Off
|
SLM
|
TCM
|
TCM goes to M-mode
|
|
Ignition key may be removed
|
On/Off
|
SLM
|
CIM
|
Used by CIM as one of the criteria for allowing the key to be removed. Lever must be in P.
|
|
Brake lights active
|
On/Off
|
REC
|
SLM
|
Used by SLM to release the interlock solenoid for the gear selector lever.
|
|
Instrument lighting, rheostat value
|
%
|
MIU
|
SLM
|
Used by SLM to increase or reduce brightness in gear selector coulisse
|
|
Vehicle speed
|
km/h
|
ECM
|
TCM
|
Used as reference speed value
|
|
Brake pedal, switch active
|
On/Off
|
ECM
|
TCM
|
Used by TCM to deactivate lock up.
|
|
Prevent shifting, request
|
On/Off
|
ECM
|
TCM
|
Used by TCM to avoid changing gear e.g. during ESP modulation
|
|
Accelerator pedal, kickdown
|
On/Off
|
ECM
|
TCM
|
Used by TCM for kickdown request.
|
|
Accelerator pedal position
|
%
|
ECM
|
TCM
|
Used by TCM (together with output shaft speed) to determine gear change points. If this information is incorrect, the gearbox will go into limp home.
|
|
Engine, limp home
|
On/Off
|
ECM
|
TCM
|
Informs TCM that the engine management system has gone into limp home.
|
|
Engine braking, fuel cut active
|
On/Off
|
ECM
|
TCM
|
Used by TCM to control slipping lock up
|
|
Engine torque, current
|
Nm
|
ECM
|
TCM
|
The value controls SLT requested pressure so that it does not exceed what is presently required by a friction element.
|
|
Engine torque, driver request
|
Nm
|
ECM
|
TCM
|
The value controls shifting points together with output shaft speed
|
|
Engine speed
|
rpm
|
ECM
|
TCM
|
Used to modulate torque converter slip
|
|
Transmission, emission-related fault active
|
On/Off
|
TCM
|
ECM
|
ECM turns on Check Engine
|
|
Shifting pattern to prevent engine jolting, request
|
On/Off
|
ECM
|
TCM
|
Request from ECM to TCM that TCM should change shifting program to prevent engine jolting
|
|
Vehicle speed
|
km/h
|
ECM
|
SLM
|
If the speed exceeds 12 km/h, SLM will activate the interlock solenoid for the gear selector lever, which is then not locked in N.
|
|
Brake pedal, switch active
|
On/Off
|
ECM
|
SLM
|
Informs SLM that the foot brake is applied, which is the criterion for SLM to release the interlock solenoid for the gear selector lever.
|
|
Key position, ignition switch
|
Lock, Off
|
CIM
|
TCM
|
The message wakes TCM (+15) and also informs it that the engine is being started (+50)
|
|
Sentronic, gear change request
|
None, up, down
|
CIM
|
TCM
|
The steering wheel buttons are connected to CIM. When the gear selector is in position M, TCM will use the value to change gear manually.
|
|
Immobiliser, transponder OK
|
On/Off
|
CIM
|
SLM
|
SLM does not release the interlock solenoid for the gear selector lever unless the transponder is approved.
|
|
Key position, ignition switch
|
Lock, Off, On, Start
|
CIM
|
SLM
|
SLM is awoken via bus
|
