VOLVO
CEM-1A5F - Communication with the brake control module (BCM). Signal missing
Układ
Centralny moduł elektroniczny (CEM)
Modele Volvo, których dotyczy ten kod błędu
Ten kod błędu ma różne znaczenie w zależności od modelu, rocznika lub silnika. Wybierz znaczenie, które dotyczy Twojego samochodu.
Dotyczy następujących modeli:
5 modeliS60 (2001–2009), S80 (1999–2006), V70 (2000–2008), V70 XC / XC70 (2001–2007), XC90 (2003–)
Co oznacza ten kod błędu?
The central electronic module (CEM) has lost the link to the brake control module (BCM) and sets this code. The BCM controls, among other things, the ABS function, so the ABS warning lamp may light and ABS may be lost. The fault lies in the communication, not in the CEM, so the CEM should not be replaced.
Możliwe przyczyny
- The BCM is not getting power
- The ground wire to the BCM is broken
- Contact resistance in the connections
- Broken CAN wiring to the BCM
- Wrong BCM for this car, for example a used module with different software or hardware
- A common CAN network fault if several communication faults are stored at the same time
Co możesz zrobić
- 1Switch the ignition on and check that the ABS warning lamp goes out after a moment. If it stays lit, the fault is still present
- 2Check the BCM fuses. If one has blown, replace it once. If it blows again, use a multimeter to check the wire after it has no contact with ground.
- 3Check that the connectors to the BCM are seated and free of corrosion, chafing or damage. Check that the ground wire is tight and clean
- 4Use a multimeter to check that the wires to the BCM have no break. If the fault remains, read the module ID with a diagnostic tool if you have one
- 5Safety: the brake control module affects the brakes, so have a workshop fix the fault promptly and do not work on the brake system yourself.
Objawy, które możesz zauważyć3
- The ABS warning lamp is lit
- ABS function is lost
- A message appears in the display
Na co może wpływać usterka1
- No ABS function
Ogólne wskazówki dla właścicieli. Diagnostyka na samochodzie może wskazać inną przyczynę.