VOLVO
IHU-U01984A - Lost Communication With Phone Module (PHM). System Internal Failures. Incorrect component installed
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 phone control module (PHM) is blocked by Infotainment Theft Protection (ITP) when its serial number is not on the list of valid serial numbers in the central electronic module (CEM). The code is then stored, and the check is carried out with the ignition in position II.
Possible causes
- An incorrect phone control module
- The software was not downloaded to the phone control module when it was replaced
- The software download to the phone control module has failed or was not completed
What you can do
- 1Has the car recently had a new phone control module fitted? Tell the workshop
- 2Have a workshop check that the correct software is loaded in the phone control module and that its serial number is registered in the central electronic module (CEM)
- 3The owner cannot fix this alone, so have a workshop carry out the check and any software download
Symptoms you may notice2
- Mobile phone functions do not work
- The Volvo On Call service does not work
General guidance for car owners. Diagnosis on the car can point to a different cause.