Audi A4: Electrical Equipment General Information
Audi A4 (B9) 2016-2025 Service Manual / Electrical System / Electrical Equipment General Information
- Battery, Starter, Generator, Cruise Control
- Windshield Wiper/Washer System
- Exterior Lights, Switches
- Interior Lights, Switches
- Wiring
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Battery
Battery General Information
To guarantee a long service life, the Battery -A- must be
checked, serviced and maintained as described in this manual.
The Battery -A- supplies the power to start the eng
Test Sequence
Battery, Checking, Vehicles with Battery Monitoring Control Module J367
or Energy Management Control Module J644 and Data Bus On Board Diagnostic
Interface J533
In certain model series the followi
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Brakes
General information
You can apply the vehicle's brakes using the brake
pedal.
Operating noise
Noises may occur when braking depending on the
speed, braking force, and outside conditions such
as temperature and humidity.
Braking effect
The response time from the brakes depends on
the weather and envi
Battery
Battery general information
Because of the complex power supply, all work
on batteries such as disconnecting, replacing,
etc., should only be performed by an authorized
Audi dealer or authorized Audi Service Facility.
Multiple batteries with different technologies
may be installed in your vehicle:
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