VOLVO
CEM-5A00 - Sun sensor. Signal too high
System
Zentralelektronik (CEM)
Volvo-Modelle, für die dieser Fehlercode gilt
Gilt für folgende Modelle:
5 ModelleS60 (2001–2009), S80 (1999–2006), V70 (2000–2008), V70 XC / XC70 (2001–2007), XC90 (2003–)
Modelle nach Baujahr und Motor anzeigen (5)
Was bedeutet der Fehlercode?
The CEM reads the sun sensor. If the signal is too high, the code is set. The cabin temperature then does not drop in strong sunlight, because the control module uses a substitute value for solar load.
Mögliche Ursachen
- The sun sensor wire is shorted to supply voltage
- A damaged sun sensor
Was Sie tun können
- 1With the ignition on, vary the light on the sun sensor and watch its signal. Cover the sensor with your hand, then shine a torch on it from close range
- 2If the sensor does not react to light, use a multimeter to check that the signal wire is not shorted to supply voltage
- 3Check that the connectors at the sun sensor and the CEM are seated and not corroded
- 4After the work, clear the code and check that the cabin cools when the sun shines
Symptome, die Sie bemerken können1
- Cabin temperature does not fall in strong sun
Was der Fehler beeinflussen kann1
- The control module uses a substitute value for solar load, roughly the maximum
Allgemeine Hinweise für Fahrzeughalter. Die Diagnose am Fahrzeug kann eine andere Ursache zeigen.