Horn failure / Steering wheel controls partly inoperative
Read the instructions below then start the fault diagnostic procedure.
Symptom: The horn does not work and no DTC is present. Not all steering wheel controls work, no DTC.
Horn failure / Steering wheel controls partly inoperative |
Fault symptom
The horn does not work and no DTC is present.Not all steering wheel controls work, no DTC.
Diagnostic help
The horn buttons can be read with the diagnostic tool.The horn outputs can be activated with the diagnostic tool.
The controls (7 (2416 Ω) or 9 (2512 Ω, Sentronic) resistors in series) are fed with +5 V from the SID. When a button is pressed, the resistor in question is grounded giving a particular voltage.
Note | ||
A button has stuck. |