VOLVO
ECM-650B - Engine cooling fan (FC). Signal missing
System
Engine Control Module (ECM)
Volvo models this fault code applies to
Applies to the following models:
5 modelsS60 (2001–2009), S80 (1999–2006), V70 (2000–2008), V70 XC / XC70 (2001–2007), XC90 (2003–)
Show models by year and engine (14)
- Volvo S60 (2001–2009)2005–2006Engine B5204T5, B5244T4, B5244T5, B5254T2, B5254T4 only
- Volvo S60 (2001–2009)2007Engine B5204T5, B5244T5, B5254T2, B5254T4 only
- Volvo S60 (2001–2009)2008–2009Engine B5204T5, B5244T5, B5254T2 only
- Volvo S80 (1999–2006)2005–2006Engine B5204T5, B5244T4, B5254T2, B6294S2, B6294T only
- Volvo V70 (2000–2008)2005Engine B5204T5, B5244T4, B5244T5, B5254T2, B5254T4 only
- Volvo V70 (2000–2008)2006–2007Engine B5204T5, B5244T5, B5254T2, B5254T4 only
- Volvo V70 (2000–2008)2008Engine B5254T2 only
- Volvo V70 XC / XC70 (2001–2007)2005All engines except: D5244T
- Volvo V70 XC / XC70 (2001–2007)2006Engine B5244T4, B5254T2 only
- Volvo V70 XC / XC70 (2001–2007)2007Engine B5254T2 only
- Volvo XC90 (2003–)2005–2006Engine B5254T2, B6294T only
- Volvo XC90 (2003–)2007–2012Engine B5254T2 only
- Volvo XC90 (2003–)2013–2014Engine B5254T9 only
- Volvo XC90 (2003–)2015
What does this fault code mean?
The engine control module checks the signal wire to the electric cooling fan and stores the fault code when the signal is missing. The fan may keep running for a while after the engine is switched off, and how long depends on engine temperature, the temperature in the engine bay and the A/C system pressure.
Possible causes
- Open circuit in the signal wire
- Damaged electric cooling fan
What you can do
- 1Check that nothing is blocking the fan blades and that they turn freely by hand with the ignition off
- 2With the ignition on, check that the electric cooling fan works at every speed step
- 3Check the fuse, supply voltage and ground lead to the electric cooling fan. The fuse box shows where the fuses are
- 4Check the connectors and wiring between the engine control module and the fan control module for damage, open circuits and short circuits
- 5If the fan cannot be activated at any speed and the wiring is intact, the fan control module may need replacing. Have a workshop do this
Symptoms you may notice1
- The electric cooling fan does not work
General guidance for car owners. Diagnosis on the car can point to a different cause.