VOLVO
ECM-7630 - Immobilizer. Faulty signal
System
Engine Control Module (ECM)
Volvo models this fault code applies to
Applies to the following models:
4 modelsC30 (2007–2013), C70 (2006–2013), S40 (2004–2013), V50 (2004–2013)
Show models by year and engine (10)
- Volvo C30 (2007–2013)2007Engine D5244T8, D5244T9 only
- Volvo C30 (2007–2013)2008–2010Engine D5244T13, D5244T8, D5244T9 only
- Volvo C70 (2006–2013)2007Engine D5244T8, D5244T9 only
- Volvo C70 (2006–2013)2008–2010Engine D5244T13, D5244T8, D5244T9 only
- Volvo S40 (2004–2013)2006Engine D5244T8 only
- Volvo S40 (2004–2013)2007Engine D5244T8, D5244T9 only
- Volvo S40 (2004–2013)2008–2010Engine D5244T13, D5244T8, D5244T9 only
- Volvo V50 (2004–2013)2006Engine D5244T8 only
- Volvo V50 (2004–2013)2007Engine D5244T8, D5244T9 only
- Volvo V50 (2004–2013)2008–2010Engine D5244T13, D5244T8, D5244T9 only
What does this fault code mean?
The engine control module treats a supply voltage that stays too low for a set time as a fault, and the immobilizer fault code is then set. The check is made before the engine is allowed to start. The fault applies to the C30, C70 (06-), S40 (04-) and V50, and the engine will not start.
Possible causes
- Low battery
- Contact resistance, oxidation or poor contact in the connections
- Break or noise on the link between the CEM and the ECM
- Faulty CAN communication
What you can do
- 1Check the battery voltage, since a weak voltage can cause the fault
- 2Check that you are using the correct ignition key, and try another key if you have one
- 3Look for loose or corroded contacts at the engine control module
- 4Using a multimeter, check that the communication wire between the CEM and the ECM is not broken
- 5If the fault remains, have a workshop with diagnostic equipment check the CAN communication
Symptoms you may notice1
- The engine will not start
General guidance for car owners. Diagnosis on the car can point to a different cause.