VOLVO
ECM-U041504 - Brake Pedal Switch Circuit. Bus Signal / Message Failures. Signal invalid
System
Engine Control Module (ECM)
Volvo models this fault code applies to
Applies to the following models:
3 modelsS60 (2011–), S80 (2007–), V70 (2008–)
Show models by year and engine (9)
- Volvo S60 (2011–)2011–2012Engine B5254T5 only
- Volvo S80 (2007–)2007–2008Engine B5254T6 only
- Volvo S80 (2007–)2009Engine B5254T6, B5254T8 only
- Volvo S80 (2007–)2010–2011Engine B5254T10, B5254T11, B5254T8 only
- Volvo S80 (2007–)2012Engine B5254T10 only
- Volvo V70 (2008–)2008Engine B5254T6 only
- Volvo V70 (2008–)2009Engine B5254T6, B5254T8 only
- Volvo V70 (2008–)2010–2011Engine B5254T10, B5254T11 only
- Volvo V70 (2008–)2012Engine B5254T10 only
What does this fault code mean?
The engine control module (ECM) constantly receives brake pedal status information from the brake control module (BCM). On cars with adaptive cruise control there is a cancel switch, which makes it possible to tell the driver's own brake pedal movements apart from braking by the system. The code is set when the signal from that switch shows the same value for an unreasonably long time. Although the code is titled brake pedal switch circuit, it concerns the cancel switch.
Possible causes
- Fault in the brake control module (BCM), which should be checked first
What you can do
- 1Read the codes in the brake control module and fix them first
- 2Check that the fuses are intact
- 3Check the CAN connections between the engine control module and the brake control module for loose or corroded contacts
- 4After battery disconnection or ECM reprogramming: hold the brake pedal down a while with the engine running to re-enable cruise
- 5Do not work on the braking system yourself. If it returns: have a workshop check the brake module and the cancel switch
Symptoms you may notice1
- The cruise control does not engage
What the fault can affect1
- The cruise control is switched off while the fault is active
General guidance for car owners. Diagnosis on the car can point to a different cause.