Self-Study Program

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JXXX* – engine control unit
● Accelerator pedal angle
● Kick-down
● Engine torque data (nominal/actual)
● Engine speed
● Driver torque input
● Coolant temperature
● Brake light/brake pedal switch
● Air conditioning system activation
● CCS status
● Altitude info
● System status
● Gearbox control unit coding
● A/C activation
● Warm up cycle
● Exhaust emission type (e.g. EOBD)
● Oil temperature protection
● Particulate filter regeneration
J104 – ESP control unit
● Lateral acceleration
● ABS, TCS and ESP intervention
● TCS shift control
● Wheel speeds (front left, front right,
rear left, rear right)
● System status
● ABS warning lamp "on"
● ESP in passive mode
J527 – Steering column electronics control unit
Control unit J527 serves as a LIN master for
control unit J453.
G85 – Steering angle sender
● Steer angle
● Steer angle speed
● System status
J453 – Multi-function steering wheel control
unit
● tiptronic status
● tiptronic shift request +
● tiptronic shift request –
LIN data bus
J428 – Adaptive cruise control unit
(ACC**)
● Deceleration request
● Sender detection (whether cruise control
or ACC)
J533 - Data bus diagnostic interface
(gateway)
● Mileage (km)
● Time, date
● CAN Sleep Acknowledge
* XXX = denotes various engine control units (die-
sel/petrol engines)
** ACC = adaptive cruise control
CAN node