Servotronic II Variable Effort Power Steering
The Servotronic II variable effort power steering system uses the proven basic steering valve design and the same principles to vary the steering wheel effort, but incorporates several improvements in the feedback mechanism over the previous design. The basic valve is a rotary steering valve with a roller bearing encased in a steering box. The principles used to vary the steering wheel effort still include active hydraulic feedback from the feedback mechanism:
Extended CAN Data Bus System
The new Audi A4 and A6 are equipped with a widely extended CAN data bus system. Due to the ever increasing number of control modules installed in the vehicle and the associated requirement for data exchange, the importance of the CAN data bus system increases significantly. For communication between the installed control modules and the diagnostic tester, two diagnosis wires (K and L) are available. The newly developed adapter VAS 6017A enables communication with all control modules.
The compass and its control button are integrated into the inside rear view mirror housing. When the ignition switch is on, the direction of vehicle travel is displayed. For the most accurate readings, the compass must be calibrated and adjusted to match the compass set zone for the area in which the vehicle is operated.
The compass is self-calibrating. It will display “C” until it calibrates itself during vehicle operation or is calibrated manually. The compass may require calibration if:
Calibrating the Compass
1. Turn the ignition switch to position II.
The rearview mirror display should show
the letter “C.”
2. If “C” is not displayed, use a ballpoint
pen or similar tool to press the button
on the bottom of the mirror for about
6 seconds until “C” is displayed, then
release the button.
3. Calibrate the compass by driving the
vehicle in circles at a speed of 5 mph
(8 km/h) or less until the mirror display
shows a direction symbol (N, NE, etc.).
Normally this will take about two circles.
Compass Set Zones
Variations in the earth’s magnetic field will cause changes in the compass readout when the vehicle is driven from one compass set zone to another. However, since the magnetic variation between adjacent zones is only 4 degrees, for most driving situations, resetting the compass should only be necessary if the vehicle has crossed more than one zone. The precise points at which the set zones change cannot be accurately plotted. Vehicles operated in an area where zones converge should not normally need to have the compass reset every time the vehicle crosses from one zone to another.
Setting the Compass Zone
1. Determine the appropriate compass
set zone for your location from
2. Turn the ignition switch to position II.
3. Using a ballpoint pen or similar tool, press
and hold the button on the bottom of the
rearview mirror for about 3 seconds until
a zone number appears on the display,
then release the button.
4. Alternately press and release the button
until the desired zone number appears.
5. About 10 seconds after releasing the
button, the directional display will appear,
completing the zone setting process.
The compass automatically
defaults to zone 8.
The headlight modules consist of the
Left J426; or Ballast Unit for
Gas-Discharge Headlight, Right J427
V48 or Right Headlight Beam Adjusting
Beam Lamp L126 (normal H7 lamps).
When the bi-xenon headlights are set to high beam, the entire light cone reflected from each High-Intensity Gas-Discharge Lamp L13 is effective. In addition, the Left High Beam Lamp L125 and Right High Beam Lamp L126 (normal H7 lamps) are turned on.
When the bi-xenon headlights are set to low beam, an electro-magnetically actuated screen is moved into position in front of the reflector, to block out part of the light cone.
Audi Telematics by OnStar
Audi Telematics by OnStar is an in-vehicle communication system using cellular telephone, internet, and global positioning system (GPS) technologies to provide safety, security, and convenience services at the touch of a button. New services will be added as the technology advances and the market demands. Refer to the OnStar user’s instructions for details on features and their availability.
GPS is an array of 24 satellites that orbit the earth and constantly broadcast radio signals. The OnStar Telephone/Telematic Control Module J526 in the vehicle receives the GPS data, decodes it, and transmits the vehicle location to the OnStar call center using cellular technology.
Symphony II Radio Transport Mode
New Audi vehicles equipped with Symphony II radios are shipped from the factory with their radios in transport mode. This reduces the parasitic voltage drain on vehicle batteries during shipping and storage. Normally, the Symphony II radio transport mode is deactivated during the new vehicle pre-delivery inspection process, prior to delivery of the vehicle to the customer. If the radio is in transport mode, pressing any radio button when the ignition switch is on will cause “TRANSPORT” to come up on the radio display.
Deactivating Transport Mode
The transport mode can be deactivated using the Vehicle Diagnosis, Test and Information System VAS 5051 and K-lead adapter VAS 6017A.
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1272 Townline Rd.
Mundelein, IL 60060
Business Hours: Monday thru Friday 9:00 am - 5:00 pm CST
Extended hours are available by appintment. (7am-10pm)
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