VOLVO
IHU-B104A23 - Switch Backward. 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 back button on the steering wheel. The code is stored when the button has been held active for too long, which means it has jammed.
Possible causes
- The backward button on the wheel is stuck down
What you can do
- 1Clear the code and check whether it returns when the button is used normally
- 2Check that the fuses are intact
- 3Press the backward button on the wheel in and let go several times, and check that it returns and does not stick
- 4If you have a diagnostic tool: read the button's value in live data and check that it returns when you release the button
- 5If the button keeps sticking, 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.