VOLVO
ECM-0578 - Cruise control. Faulty signal
System
Engine Control Module (ECM)
Volvo models this fault code applies to
This fault code has different meanings depending on model, model year or engine. Select the meaning that applies to your car.
Applies to the following models:
4 modelsC30 (2007–2013), C70 (2006–2013), S40 (2004–2013), V50 (2004–2013)
Show models by year and engine (6)
- Volvo C30 (2007–2013)2007–2010Engine D4204T only
- Volvo C70 (2006–2013)2008–2010Engine D4204T only
- Volvo S40 (2004–2013)2004–2006Engine D4204T, D4204T2 only
- Volvo S40 (2004–2013)2007–2010Engine D4204T only
- Volvo V50 (2004–2013)2004–2006Engine D4204T, D4204T2 only
- Volvo V50 (2004–2013)2007–2010Engine D4204T only
What does this fault code mean?
The steering wheel unit (SWM) passes cruise control button presses over CAN to the engine module. If the signal is faulty, or there is a fault in CAN communication, the code is set.
Possible causes
- Fault in the steering wheel module (SWM)
What you can do
- 1If you have a diagnostic tool, read the fault codes in the steering wheel module (SWM) first and deal with them, as this code cannot be erased until they are fixed
- 2Erase the engine module code only after the fault in the steering wheel module has been fixed
- 3Check that the cruise control buttons on the steering wheel work and return normally
- 4If the fault remains, have a workshop with diagnostic equipment check the steering wheel module and the CAN communication
Symptoms you may notice1
- Cruise control does not engage
General guidance for car owners. Diagnosis on the car can point to a different cause.