VOLVO
CPM-3341 - Overheat protection thermostat. Signal too high / Signal missing
Układ
Ogrzewanie postojowe (CPM)
Modele Volvo, których dotyczy ten kod błędu
Dotyczy następujących modeli:
5 modeliC30 (2007–2013), C30 Electric (2011–2013), C70 (2006–2013), S40 (2004–2013), V50 (2004–2013)
Co oznacza ten kod błędu?
The combustion preheater module (CPM) has registered a signal from the overheat protection thermostat that is too high. The thermostat protects the heater from overheating, and the fault can be caused by a short to supply voltage in the cable, a damaged thermostat or poor contact. The heater cannot be activated until the code has been cleared.
Możliwe przyczyny
- The cable between the CPM and the overheat protection thermostat is shorted to supply voltage
- Break in the cable between the CPM and the overheat protection thermostat
- Damaged overheat protection thermostat
- Contact resistance, oxidation or loose connections
Co możesz zrobić
- 1Clear the code and check whether it returns when the ignition is switched on
- 2If you have a diagnostic tool, activate the heater and check that the temperature at the overheat protection thermostat rises
- 3Disconnect the connector at the overheat protection thermostat and check that the contacts are secure and free from oxidation
- 4Use a multimeter to check that the cable carries no voltage when the heater is off; if it does, the cable is shorted to positive
- 5If the fault returns, have a workshop measure the thermostat resistance and check the wiring
Objawy, które możesz zauważyć2
- Poor heating in the passenger compartment
- The parking heater does not work
Na co może wpływać usterka1
- The heater cannot be activated until the fault code has been cleared
Ogólne wskazówki dla właścicieli. Diagnostyka na samochodzie może wskazać inną przyczynę.