VOLVO
IHU-U021400 - Lost Communication With Keyless Vehicle Module (KVM). General Failure Information. No sub type information
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?
Communication between the infotainment head unit (IHU) and the keyless vehicle module (KVM) runs over CAN. The code is stored when that communication stops, which means the locking functions do not work.
Possible causes
- A break in the communication line
- A short-circuit to ground in the communication line
- A short-circuit to supply voltage in the communication line
- Contact resistance, oxidation or breaks in the connections
What you can do
- 1Clear the code and check whether it returns
- 2Check that the fuses are intact
- 3Check that the connectors in the connections are firmly seated and free from oxidation
- 4Test locking and unlocking with the key and see whether the central locking responds
- 5If the fault remains, have a workshop trace the communication line and the keyless vehicle module (KVM) further
Symptoms you may notice1
- Locking, unlocking and the central locking do not work
General guidance for car owners. Diagnosis on the car can point to a different cause.