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Daniel Wilson
Daniel Wilson,
Category: Medium and Heavy Trucks
Satisfied Customers: 4557
Experience:  Owner at DJ Wilson
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What are the voltage specs on the throttle position sensor

Customer Question

What are the voltage specs on the throttle position sensor on a 871 Cummins ISX ? Even after a new sensor was replaced the voltage shows to be out of range on Cummins Insite. The signal voltage shows to out of range on sensor 1 and 2, but the code is always inactive. The 1239 code only seems to appear after the truck drives down the road, but it accelerates just fine parked.
Submitted: 9 months ago.
Category: Medium and Heavy Trucks
Expert:  Daniel Wilson replied 9 months ago.
Hi my name is***** will be glad to help. Is 1239 the only fault code you are getting? Also what is the complete engine model ISX you have and what is the year and make of your chassis? Is there a remote throttle installed for like a log loader, tow truck, etc?
Customer: replied 9 months ago.
It is in a 2008 Peterbuilt conventional truck and no remote throttle. The truck has multiple aftertreatment codes along with the inactive throttle sensor code.One code was related to the doser injector and another one was related to the aftertreament filter itself. I believe all the ecm showed was a Cummins ISX 871 model with 485 hp.
Expert:  Daniel Wilson replied 9 months ago.
Click below for the diagram. The ECM sends a 5V signal and reads the return voltage.
Expert:  Daniel Wilson replied 9 months ago.
Schematic.
Expert:  Daniel Wilson replied 9 months ago.
If a new sensor be sure to calibrate after install. Key on, press pedal slowly to the floor and back up 3 times then start
Expert:  Daniel Wilson replied 9 months ago.
If the problem still exists check the sensor harness and connector pins between the ECM and sensor.

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