wolfe10
Florida
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Joined: 10/08/2000
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Have you confirmed that you do have an exhaust brake.
As mentioned, the Cummins ISL could be ordered with either an exhaust brake, or for more $$ an engine compression brake (aka Jake brake). Also possible you have a VGT that acts as an exhaust brake.
Look at the exhaust manifold. If you have an exhaust brake, it will be bolted to the exhaust manifold.
Calling Cummins with your engine serial number would tell you exactly what you have.
Cummins 800-286-6467
* This post was
edited 07/19/22 09:18am by wolfe10 *
Brett Wolfe
Ex: 2003 Alpine 38'FDDS
Ex: 1997 Safari 35'
Ex: 1993 Foretravel U240
Diesel RV Club:http://www.dieselrvclub.org/
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captron33
usa
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Joined: 10/17/2004
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Yes my coach has a exhaust brake.
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captron33
usa
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Reposting this. Stll not working.
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wolfe10
Florida
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As I posted above, one of the first things to check when the exhaust brake does not engage/transmission begin downshifting toward the "preselect gear", is the THROTTLE POSITION SENSOR.
If the sensor does not send the "throttle is closed" signal, the exhaust brake should not come on.
If you are not familiar with this, take it to someone who is. Having the wiring diagram for your system will save you time and $$$.
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