VOLVO
ECM-1656 - Control module communication problems. Faulty signal
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 (6)
- Volvo C30 (2007–2013)2007–2010Tylko silnik: D4204T
- Volvo C70 (2006–2013)2008–2010Tylko silnik: D4204T
- Volvo S40 (2004–2013)2004–2006Tylko silnik: D4204T, D4204T2
- Volvo S40 (2004–2013)2007–2010Tylko silnik: D4204T
- Volvo V50 (2004–2013)2004–2006Tylko silnik: D4204T, D4204T2
- Volvo V50 (2004–2013)2007–2010Tylko silnik: D4204T
Co oznacza ten kod błędu?
The ECM detects a serious disturbance on the CAN bus, which is the shared data link between the car's modules. Communication with it is then blocked, and the fault code is set.
Możliwe przyczyny
- Contact resistance or oxidation in the terminals
- Open circuit in one of the CAN wires
- Short circuit between the CAN wires
- Fault inside the ECM itself
- Fault inside another module on the same CAN segment
Co możesz zrobić
- 1First read the fault codes stored in CEM and the other modules. Do not clear this code until those are fixed, since it may be a knock-on fault
- 2Switch off the ignition and check the connectors on the CAN network for contact resistance and oxidation
- 3With a multimeter, check that the CAN wires have no break and are not shorted to each other
- 4If the fault remains after this, have a workshop check the control modules on the CAN network
Objawy, które możesz zauważyć1
- Warning symbol and a text message in the display
Na co może wpływać usterka1
- The engine control module may stay shut off until the power supply is interrupted, then it tries to communicate again
Ogólne wskazówki dla właścicieli. Diagnostyka na samochodzie może wskazać inną przyczynę.