VOLVO
ECM-740B - Communication, central electronic module (CEM). Signal missing
Układ
Sterownik silnika (ECM)
Modele Volvo, których dotyczy ten kod błędu
Dotyczy następujących modeli:
4 modeleC30 (2007–2013), C70 (2006–2013), S40 (2004–2013), V50 (2004–2013)
Pokaż modele wg rocznika i silnika (9)
- Volvo C30 (2007–2013)2007Tylko silnik: B5254T3
- Volvo C30 (2007–2013)2008–2013Tylko silnik: B5254T7
- Volvo C70 (2006–2013)2006–2007Tylko silnik: B5254T3
- Volvo C70 (2006–2013)2008–2013Tylko silnik: B5254T7
- Volvo S40 (2004–2013)2005–2007Tylko silnik: B5254T3
- Volvo S40 (2004–2013)2008Tylko silnik: B5254T3, B5254T7
- Volvo S40 (2004–2013)2009–2012Tylko silnik: B5254T7
- Volvo V50 (2004–2013)2005–2007Tylko silnik: B5254T3
- Volvo V50 (2004–2013)2008–2012Tylko silnik: B5254T7
Co oznacza ten kod błędu?
The ECM has logged a problem on the CAN link between the CEM and the ECM. The fault may be caused by a broken or shorted CAN wire, or by an internal fault in the engine control module or in another module on the same part of the network. The fault applies to the C30, C70 (06-), S40 (04-) and V50.
Możliwe przyczyny
- Open circuit in one of the CAN wires
- Short circuit between the CAN wires
- Internal fault in the engine control module
- Internal fault in another control module on the same part of the CAN network
Co możesz zrobić
- 1First read the codes in the central electronic module and in other affected control modules, and remedy them
- 2Visually inspect the CAN wires to the engine control module for chafing, breaks and loose connectors
- 3Using a multimeter, check that the CAN wires are not shorted to each other or to ground
- 4Clear this code only after the other codes have been remedied and cleared, then road test the car
- 5If the fault remains, have a workshop with diagnostic equipment check the CAN network and the engine control module
Objawy, które możesz zauważyć1
- No noticeable symptoms for the driver
Ogólne wskazówki dla właścicieli. Diagnostyka na samochodzie może wskazać inną przyczynę.