Combination Switch: Description and Operation

94 Combined steering column module/multi-function steering wheel

The combined steering column module reads in the button and switch signals generated by module levers and outputs this on the Comfort CAN.

Lever functions







Direction indicators
- Direction indication left
- Direction indication right
- High beam
- Headlight flasher

On-board computer
- Scroll down
- Scroll up
- Set
- Reset

Wiper
- Intermittent
- Wiping 1
- Wiping 2
- Headlight cleaning
- Rear wiper
- Washing
- Potentiometer for intermittent mode
- Wash before wipe

Cruise control
- On/off
- Set
- Decelerate
- Accelerate

Multi-function steering wheel (optional)







The multi-function steering wheel is based on the basic steering wheel. Unlike the basic steering wheel, however, it has four function buttons and two function rollers evenly divided between the left-hand and right-hand spokes.

These controls allow the driver to operate essential audio, telephone and navigation functions without having to take their hands off the wheel. This means less distraction and better concentration on what is happening on the road.

The black function buttons are embedded in bezels painted with an aluminium-look finish. This clearly emphasises the controls, both visually and functionally. They are also ergonomically arranged to ensure the driver can easily operate them using their left or right thumb.

The steering wheel electronics system comprises two switch modules, a multifunction control unit, an airbag module and a horn contact. The signals from the Tiptronic rocker switches and the buttons are fed into the multi-function control unit in voltage-encoded form.

In the multi-function control unit the individual signals are combined into a protocol and relayed serially via single-core cable, volute springs to the combined steering column module, where they are processed for CAN transmission.

Diagnosis
Diagnosis is carried out with the PIWIS tester under menu option "Steering wheel electronics".

Some functional features of the vehicle electrical system are restricted or disabled in production and transportation mode.







Positions of the controls