What does fault code CCM-B103087 mean?

Diagnostic fault code details for CCM-B103087 (Volvo S60 (2011–), Volvo S80 (2007–), Volvo V40 (2013–)). Repair service at OBD Tuning.

VOLVO

CCM-B103087 - Left Front Seat Heater. Bus Signal / Message Failures. Missing message

System

Climate Control Module (CCM)

Volvo models this fault code applies to

Applies to the following models:

9 models

S60 (2011–), S80 (2007–), V40 (2013–), V40 Cross Country (2013–), V60 (2011–), V60 Cross Country (2015–), V70 (2008–), XC60 (2009–), XC70 (2008–)

Show models by year and engine (9)

What does this fault code mean?

The climate control module (CCM) gets no response from the seat heating module (SHM) in the left front seat. The module sends its status to the control module over the LIN bus, and when the reply is missing the control module cannot control the heat. The cause may be a lost voltage supply or ground, a fault in the bus between the control module and the seat heating, or an internal fault in the module.

Possible causes

Lost voltage supply or a problem with the ground connection
Fault in the LIN bus between the control module and the left front seat heating, or in the connector at the climate unit
Internal fault in the seat heating module (SHM)
Internal fault in the left front seat heating module (SHML)

What you can do

1Check that the fuses are intact, especially the fuse for the seat heating
2Check that the connectors to the seat heating and to the climate unit are firmly seated and free from oxidation
3Use a multimeter to check that the supply to the seat heating is present with the ignition on, and that the ground wire has contact with ground (the body)
4Read off and clear the fault code, then road test the car to see whether it returns
5With diagnostic equipment, activate the left front seat heating and check that it starts. If it does not, and the connectors are sound, the bus needs checking
6If the fault remains after these checks, have a workshop check the LIN bus between the climate control module and the seat heating

Symptoms you may notice2

The electric heating in the front seat does not work
The front seat heating does not work or gets too hot

General guidance for car owners. Diagnosis on the car can point to a different cause.