Safety Warning
DIY auto repair can cause serious injury, fire, or vehicle damage. These guides are for informational purposes only. Always follow OEM torque specs, wear PPE, and consult a certified mechanic if you are unsure. You are solely responsible for your safety.
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HOMESERVICE MANUALSAUDI2001A6 AVANT QUATTROREPAIR AND DIAGNOSISSTEERINGSTEERING COLUMNSERVOTRONIC, ASSEMBLY OVERVIEWSPEED SIGNAL, CHECKING
2001 Audi A6 Avant Quattro
Speed signal, checking
2001 Audi A6 Avant QuattroSECTION Speed signal, checking
The speed signal comes from the speedometer -G21- in the instrument cluster.
- Remove driver's side storage compartment.
See DRIVER'S STORAGE COMPARTMENT, REMOVING .
For Right Hand Drive (RHD) vehicles
- Unbolt mounting bracket and remove.
- Remove relay for servotronic control module -J236-, position 13.
- If the voltage supply, the servotronic valve and the speed indication at the speedometer are OK, check electrical wire between terminal 4 and speedometer -G21-.
See appropriate System Wiring Diagrams article.
- If electrical wire between terminal 4 and speedometer -G21- is OK, replace relay for servotronic.
RENDER: 1.0x
NO RELATED
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When to See a Mechanic
Stop DIY work and contact a certified mechanic immediately if any of the following apply:
- • You smell fuel, burning insulation, or see smoke.
- • Brakes feel soft, pull hard to one side, or make grinding noises.
- • The engine overheats, stalls repeatedly, or misfires under load.
- • You are missing required tools, torque specs, or safe lifting equipment.
- • You are not confident in the next step or safety outcome.