VOLVO
ECM-922A - Cruise control. Faulty signal
System
Engine Control Module (ECM)
Volvo models this fault code applies to
Applies to the following models:
3 modelsS60 (2001–2009), S80 (1999–2006), V70 (2000–2008)
Show models by year and engine (13)
- Volvo S60 (2001–2009)2001Engine B5244S, B5244S2 only
- Volvo S60 (2001–2009)2002Engine B5244S, B5244S2, B5244SG, B5244SG2 only
- Volvo S60 (2001–2009)2003–2005Engine B5244SG, B5244SG2 only
- Volvo S60 (2001–2009)2006–2008Engine B5244SG only
- Volvo S80 (1999–2006)1999–2000Engine B5244S, B5244S2 only
- Volvo S80 (1999–2006)2001Engine B5244S, B5244S2, B5244SG only
- Volvo S80 (1999–2006)2002Engine B5244S, B5244S2, B5244SG, B5244SG2 only
- Volvo S80 (1999–2006)2003–2005Engine B5244SG, B5244SG2 only
- Volvo S80 (1999–2006)2006Engine B5244SG only
- Volvo V70 (2000–2008)2001Engine B5244S, B5244S2, B5244SG only
- Volvo V70 (2000–2008)2002Engine B5244S, B5244S2, B5244SG, B5244SG2 only
- Volvo V70 (2000–2008)2003–2005Engine B5244SG, B5244SG2 only
- Volvo V70 (2000–2008)2006–2008Engine B5244SG only
What does this fault code mean?
The engine control module (ECM) checks the cruise control button information that the steering wheel module (SWM) sends over the CAN network, including a checksum. The code is set if the information does not match or seems unreasonable. The cause can be a defective steering wheel module or an incorrect system voltage.
Possible causes
- Defective steering wheel module (SWM)
- Incorrect system voltage
What you can do
- 1Check whether other modules have fault codes for CAN faults, and troubleshoot those first if so
- 2Read off the fault codes in the steering wheel module (SWM), which may show faults in the cruise control buttons, and remedy them first
- 3Read the frozen values and counters. If the code came at low battery voltage at start, check the battery charge, since low voltage can be the cause.
- 4Ask the workshop whether upgraded software is available for the car. It requires a minimum vehicle speed for the tests to be active, and it is more tolerant of brief interference
- 5Erase the codes and reset: ignition off for three minutes, on and off again, then three more. Add two minutes if the cooling fan has been running.
Symptoms you may notice2
- A general orange warning lamp lights
- The cruise control does not work at all
What the fault can affect2
- The cruise control is switched off during the driving cycle when the fault was detected
- The cruise control works again the next time the car starts if the fault is gone
General guidance for car owners. Diagnosis on the car can point to a different cause.