How do you bump up idle on Volvo semi?

Answer 1

Well, high idle has to be enabled - some fleets have it disabled. If it isn't disabled, it's more the same as on any other semi.. doesn't matter if you have a Volvo or Cummins engine (or Cat prior to 09, or Detroit prior to 2003). With the parking brakes set, and no pressure on the clutch (if you have one) or brake pedals (position must be at absolute zero... same thing with regens), then you just press the "Resume/Accel" button and it'll bump up your idle. On Volvos, this is typically on the end of the turn signal/mulitifunction switch on the left side of the steering column. Exactly what this will do for you depends on a number of things... it may or may not bypass an idle shutdown timer, depending on how stringent the company was when they had the parameters set in the ECM.