VOLVO
CEM-1C21 - Relay, infotainment. Signal too high
System
Zentralelektronik (CEM)
Volvo-Modelle, für die dieser Fehlercode gilt
Gilt für folgende Modelle:
1 ModellXC90 (2003–)
Modelle nach Baujahr und Motor anzeigen (1)
Was bedeutet der Fehlercode?
The CEM registers that the signal to the coil of the infotainment relay is too high. The usual cause is a short to supply voltage in the relay circuit or a defective relay. The audio system does not work.
Mögliche Ursachen
- A short to supply voltage in the relay circuit
- A defective relay
Was Sie tun können
- 1Check that the fuses for the infotainment relay are intact. If one has blown, replace it once
- 2Replace the infotainment relay with an identical one. If the audio system then works, the old relay was probably defective
- 3With the ignition on, check that the relay clicks when activated. A click shows that the relay works
- 4Use a multimeter to check the wire between the relay and the infotainment module for a short to supply voltage. If the fault remains, check the module with a diagnostic tool
- 5After the work, clear the code and check that the audio system works
Symptome, die Sie bemerken können1
- The audio system does not work
Allgemeine Hinweise für Fahrzeughalter. Die Diagnose am Fahrzeug kann eine andere Ursache zeigen.