VOLVO
ECM-711C - Immobilizer. Signal too high
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 (9)
- Volvo C30 (2007–2013)2007Engine B5254T3 only
- Volvo C30 (2007–2013)2008–2013Engine B5254T7 only
- Volvo C70 (2006–2013)2006–2007Engine B5254T3 only
- Volvo C70 (2006–2013)2008–2013Engine B5254T7 only
- Volvo S40 (2004–2013)2005–2007Engine B5254T3 only
- Volvo S40 (2004–2013)2008Engine B5254T3, B5254T7 only
- Volvo S40 (2004–2013)2009–2012Engine B5254T7 only
- Volvo V50 (2004–2013)2005–2007Engine B5254T3 only
- Volvo V50 (2004–2013)2008–2012Engine B5254T7 only
What does this fault code mean?
The immobilizer code in the engine control module (ECM) is compared with the central electronic module (CEM), and the hardware serial number of the brake control module (BCM) is checked over the CAN network before the engine may start. If the engine control module detects an internal fault in itself with the ignition on, the code is set. The engine then does not start.
Possible causes
- Damaged engine control module (ECM)
What you can do
- 1Check that the connectors on the engine control module are firmly seated and free from oxidation
- 2Because the fault lies in the engine control module, replacing it is a workshop job
- 3After the work, start the engine and check that the immobilizer works
Symptoms you may notice1
- The engine cranks but will not start
General guidance for car owners. Diagnosis on the car can point to a different cause.