VOLVO
ECM-1460 - relay. Faulty signal
System
Engine Control Module (ECM)
Volvo models this fault code applies to
Applies to the following models:
3 modelsC30 (2007–2013), S40 (2004–2013), V50 (2004–2013)
Show models by year and engine (13)
- Volvo C30 (2007–2013)2007–2009Engine B4184S11, B4184S8, B4204S3 only
- Volvo C30 (2007–2013)2010Engine B4184S11, B4184S8, B4204S3, B4204S4 only
- Volvo C30 (2007–2013)2011–2013Engine B4204S3, B4204S4 only
- Volvo S40 (2004–2013)2005Engine B4184S11 only
- Volvo S40 (2004–2013)2006Engine B4184S11, B4184S8 only
- Volvo S40 (2004–2013)2007–2009Engine B4184S11, B4184S8, B4204S3 only
- Volvo S40 (2004–2013)2010Engine B4184S11, B4184S8, B4204S3, B4204S4 only
- Volvo S40 (2004–2013)2011–2012Engine B4204S3, B4204S4 only
- Volvo V50 (2004–2013)2005Engine B4184S11 only
- Volvo V50 (2004–2013)2006Engine B4184S11, B4184S8 only
- Volvo V50 (2004–2013)2007–2009Engine B4184S11, B4184S8, B4204S3 only
- Volvo V50 (2004–2013)2010Engine B4184S11, B4184S8, B4204S3, B4204S4 only
- Volvo V50 (2004–2013)2011–2012Engine B4204S3, B4204S4 only
What does this fault code mean?
The engine control module (ECM) monitors the signal from the A/C relay. The fault is set when the signal is faulty, which can be caused by a break, a short to ground or voltage, or a damaged engine control module.
Possible causes
- Open circuit in the signal wire
- Signal wire shorted to ground
- Signal wire shorted to voltage
- Damaged engine control module (ECM), which is unusual
What you can do
- 1Read the fault code, clear it and test drive to see whether it returns
- 2Check the relevant connectors to the A/C relay for play, contact resistance and oxidation
- 3Check the signal wire to the A/C relay for breaks and shorts to ground
- 4Check that the signal wire is not shorted to voltage
- 5If the wiring is fault-free: have a workshop check the A/C relay and the engine control module
Symptoms you may notice1
- Temperature control and air conditioning do not work
General guidance for car owners. Diagnosis on the car can point to a different cause.