How to detect if the Cummins ECM has been enabled for high idle

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How to detect if the Cummins ECM has been enabled for high idle?

It not to hard to check to see if you have high idle software present. The only thing you need is a resistor that is 39k ohm or greater up to no more than 100k ohm resistor. The other requirement is to have a cold engine. Engine coolant temperature must be below 140 degree Fahrenheit  for this test to work properly. Just unplug the IAT sensor and take your resistor and fold the legs over and insert into the plug. Make sure to the IAT and the resistor are not touch metal or ground. You could put a fold of tape over the plug and resistor for temporary cover. Now just start your truck and leave it idle don’t touch the throttle, brakes, trans (auto), etc. Leave it alone for up to 5 minutes. Typically 2-3 minutes you should hear the idle ramping up to 1,200 RPM’s. If the resistor is greater than 56K ohms then the 3 cylinder high idle will pop up next after reaching 1,200 RPM’s.

How to detect if the Cummins ECM has been enabled for high idle

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Welcome to Mopar1973Man.com web site. This web site is a personal collection of notes, information, ideas, and designs to aid you with repairs, maintenance, Bomb's, Mod's for your Mopar, Dodge, or Cummins Product. This site is organized as a drill down type menu to the left. Most of the goodies are listed in the tips and tricks. So grab yourself a cup of your favorite beverage and sit down and start reading and learning about you vehicle.

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