[d1giPhux]

Check post #11 from this thread:

Cruise Control not working

Ok, this is a weird one... My 2011 (137k miles) cruise will not engage. As someone had mentioned several years ago, it lights up as long as I'm holding the set button down but never will engage. I'm the second owner of this car, having purchased it exactly one year ago. The cruise worked at...

www.crzforum.com

I also fixed mine the same way. Pretty sure it was the 'brake pedal stopper' on mine. This is a little plastic piece that sits on the brake pedal to activate the brake pedal position switch. Part number below..

This will most likely fix your issue.

Here is the 'pedal position switch' section from the FSM:

I outlined the part you need. Its #7 in the 3rd image.

And shown in detail in the following image:

Part # 46505-SA5-000

There may also be one of these for the clutch pedal as well if you have a 6spd. But, pretty sure mine was the brake pedal. Been a while since I did it..

 

[d1giPhux]

@seejay did you check the gap between the switch and the stoppers though?

Next thing would be to check the relays definitely.

Do you have the factory service manual to do the diagnostic testing for the cruise control?

How fast are you going when you test the cruise? You need to be going 25 mph+

 

[d1giPhux]

@seejay Which of these diagnostics closely resembles what is happening in your car?: