VOLVO
IHU-B104B23 - Switch Voice recognition/Mute. General Signal Failures. Signal stuck low
System
Infotainment Head Unit (IHU)
Volvo models this fault code applies to
Applies to the following models:
9 modelsS60 (2011–), S80 (2007–), V40 (2013–), V40 Cross Country (2013–), V60 (2011–), V60 Cross Country (2015–), V70 (2008–), XC60 (2009–), XC70 (2008–)
What does this fault code mean?
The infotainment head unit (IHU) monitors the voice-control/mute switch on the wheel. The code is stored when the switch has been active for too long, which means it has jammed.
Possible causes
- The voice-control/mute switch is stuck in the pressed position
What you can do
- 1Clear the code and check whether it returns when the button is used as normal
- 2Check that the fuses are intact
- 3Press the voice-control/mute switch on the wheel several times and check that it returns without sticking
- 4If you have a diagnostic tool: read the button's value in live data and check that it returns when the button is released
- 5If the button still sticks, have a workshop check the steering wheel and the button further
Symptoms you may notice1
- The steering wheel button panel for the audio system does not work
General guidance for car owners. Diagnosis on the car can point to a different cause.