Was bedeutet der Fehlercode CEM-U000188?

Diagnose und Fehlercodedefinition für CEM-U000188 (Volvo S60 (2011–), Volvo S80 (2007–), Volvo V40 (2013–)). Steuergerätereparatur bei OBD Tuning.

VOLVO

CEM-U000188 - High Speed CAN Communication Bus. Bus Signal / Message Failures. Bus off

System

Zentralelektronik (CEM)

Volvo-Modelle, für die dieser Fehlercode gilt

Gilt für folgende Modelle:

9 Modelle

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

Modelle nach Baujahr und Motor anzeigen (9)

Was bedeutet der Fehlercode?

The module has disconnected itself from the high speed CAN, so-called bus-off, after its message traffic became faulty. The cause is most often a break in one or both CAN wires in part of the network, or a short between the internal CAN wires. Starting and driving can then be affected.

Mögliche Ursachen

Open circuit in one or both CAN wires in part of the network
Short circuit between the internal CAN wires

Was Sie tun können

1Clear the fault codes, start the car and read them again. If bus-off returns straight away, the fault is active
2Check the high speed harness for breaks, chafing and pinch damage, especially where it passes through a grommet
3Check the connectors on the network for loose connections, corrosion and moisture
4With a diagnostic tool, read the fault codes from all control modules. A module that has gone into bus-off often shows no other faults
5Gently flex the harness with the ignition on and see whether the fault code changes
6Have a workshop measure the resistance on the network, since it requires the network to be separated

Symptome, die Sie bemerken können5

The engine does not start even though the starter turns
Poor performance and lack of power
The throttle response hesitates, surges or is jerky
Cruise control cannot be engaged
The speedometer and tachometer show wrong readings

Was der Fehler beeinflussen kann2

The module switches itself off (bus-off) and stays off until its power supply is cut
At the next power-up the module makes new attempts to communicate

Allgemeine Hinweise für Fahrzeughalter. Die Diagnose am Fahrzeug kann eine andere Ursache zeigen.