VOLVO
ECM-721A - Immobilizer. Faulty signal
System
Motorsteuergerät (ECM)
Volvo-Modelle, für die dieser Fehlercode gilt
Gilt für folgende Modelle:
2 ModelleS40 (2004–2013), V50 (2004–2013)
Modelle nach Baujahr und Motor anzeigen (2)
Was bedeutet der Fehlercode?
The immobilizer gets a faulty signal because the BCM's hardware serial number differs from the one saved in the ECM. The fault applies to the S40 (04-) and V50, and the starter cranks but the engine will not run.
Mögliche Ursachen
- The programmed hardware serial number in the engine control module does not match the hardware serial number in the brake control module (BCM)
Was Sie tun können
- 1Read and note the code, clear it and switch the ignition on again to see whether it returns
- 2If you have a diagnostic tool: read the codes in the engine control module and see whether any other code is stored
- 3Has the brake control module or the engine control module been replaced recently? If so, their hardware serial numbers may differ
- 4Work on the brake control module (BCM) and its programming should be done by a workshop, as it controls the braking system
- 5If the fault remains, have a workshop with diagnostic equipment compare the numbers and program the engine control module if needed
Symptome, die Sie bemerken können1
- The starter cranks but the engine will not run
Allgemeine Hinweise für Fahrzeughalter. Die Diagnose am Fahrzeug kann eine andere Ursache zeigen.