VOLVO
CEM-4F30 - Battery temperature. Signal too high
System
Zentralelektronik (CEM)
Volvo-Modelle, für die dieser Fehlercode gilt
Gilt für folgende Modelle:
5 ModelleC30 (2007–2013), C30 Electric (2011–2013), C70 (2006–2013), S40 (2004–2013), V50 (2004–2013)
Modelle nach Baujahr und Motor anzeigen (5)
Was bedeutet der Fehlercode?
The CEM calculates the battery temperature from the battery temperature sensor. If the sensor circuit is shorted to supply voltage or has a break, the code is set. The battery may then discharge, and the battery temperature may be shown wrongly.
Mögliche Ursachen
- Contact resistance in the control module connector
- An open circuit in the signal ground wire
- An open circuit in the signal wire, or the signal wire is shorted to supply voltage
- A damaged battery temperature sensor
Was Sie tun können
- 1With a diagnostic tool, follow the battery temperature in live data and check that the value is reasonable
- 2Check that the connectors at the battery and at the CEM are seated and not corroded
- 3Use a multimeter to check that the signal wire from the battery sensor has no break or short to supply voltage
- 4If the fault remains, have a workshop replace the battery temperature sensor
- 5After the work, clear the code and check that the battery charges normally
Symptome, die Sie bemerken können1
- The battery discharges
Was der Fehler beeinflussen kann1
- The battery temperature is shown wrongly
Allgemeine Hinweise für Fahrzeughalter. Die Diagnose am Fahrzeug kann eine andere Ursache zeigen.