Every pass I make on the dyno with my EVO X triggers an ABS light and a Service Engine light which is easily reset by turning the car off, and then back on. I disabled ASC on every pass but it didn't help.

Anyone else seeing this on their EVO's?

- Louis

 

I've seen this happen just about everytime my car is on the dyno. I think it's pretty normal.

 

hold down the ASC button for 3 seconds to fully disable ASC

 

happens when you just fart in your car! seriously, it happened to me a month ago just on the freeway going around some turns reset battery and it went away.

 

I'm sure this roots back to the airflow check and airflow against torque tables in the ecu, but I'm still confused why some cars exhibit this behavior and others don't. Why in the world would the ABS light come on though? That system should be completely unrelated. Computer glitch, maybe?

 

Mine only did it with a aftermarket bov

 

Actually I think it's because the dyno operator may be hitting the brakes after the pull. Once he does that, the front and rear wheels will rotate at different speeds. The ECU may think that something is wrong with ABS system since the wheels were rotating at different speeds when the brakes were applied, thus causing the ABS check light to come on temporarily.

 

I dont think that is it because mine only did it at full throttle and I was'nt on the brake

 

ASC or ABS light?

 

Every single 10 that has been on our mustang dyno has lit the ABS light. Maybe 30+ at this point?

 

My bad, I was thinking ASC

 

I was the "dyno operator", and trust me... you never touch the brakes on a dyno unless you want an explosion of differential metal all over the dyno floor.

The ABS light is triggered (as others have said) upon acceleration, usually above 5K RPM or so. Weird. Thanks for your input guys!

- Louis

 

I got it as well. A restart of the car cleared it. I figured it was because the rollers moving at different speeds.

 

I hope not.

 

It's impossible for the Mustang dyno rollers to move at different speeds as they are mechanically linked.