Audi 80 Quiz
Instruments and Auxiliary Equipment

Speedometer

In this manual: Instruments and Auxiliary Equipment
Technical Description — 39Engines — 41Exhaust System — 13Cooling System — 28Fuel tank and fuel pump — 12Air Filter and Intake Ducts — 13Mono-Motronic Injection System — 18Digifant Injection System — 19KE-III-Jetronic Injection System — 35MPI and MPFI Injection Systems — 32Clutch — 11Transmission and Driveline — 21Suspension and Steering — 33Brake System — 41Anti-lock brake system — 8Wheels and Tires — 13Body Electrical System — 35Ignition System — 24Lighting — 14Signaling Devices — 7Instruments and Auxiliary Equipment — 54Heating and Ventilation — 7Body Components — 18Troubleshooting — 6Specifications — 13
~1min read

Previously, speedometers were driven by a flexible cable, the speedometer cable. The Audi 80 is different: its speedometer is an electronic measuring instrument, similar to the tachometer. Like the tachometer, it receives rotational speed pulses, but not from the engine; they come from a sensor in the transmission, which measures the wheel rotational speed. The instrument compares the speed pulses with a time base and thus obtains a reference value for vehicle speed.


Because there is no mechanical drive, the odometer operates partly electrically: a so-called stepper motor turns the odometer drive shaft step by step, depending on the number of speed pulses.


Advantages of the electronic speedometer: quiet operation and more accurate readings.


If the speedometer does not work, first check the corresponding fuse in the fuse box.

Test yourself

A quick Audi 80 quiz: every answer comes with an explanation and a link to the manual page.