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Code E85


wdsj

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P085 (E085) Idle Throttle Angle Too High

TPS may be incorrectly adjusted or loose. The ISC is the Idle Speed Control, which is a stepping motor that adjusts idle speed. I don't know what the ISC Jumper would be; I don't have anything on the 4.9. Someone else here with the right FSM or experience with that model needs to chip in here.

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I am trying to follow the diagnostic for code E85 out of the FSM.

I suppose "remove the ISC jumper" could simply mean remove the electrical connection to the ISC. I can't find any other reference to ISC jumper.

TB is clean

ISC activates and moves

My next plan was to reset the base angle per the FSM

Edited by wdsj
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I am entering this just to close the post.

Amazing what happens you follow the FSM verbatim. I did everthing before except - disconnect the battery terminal.

Disconnected battery (resets the PCM) then perform TPS/Idle learn.

all is good.

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I am entering this just to close the post.

Amazing what happens you follow the FSM verbatim. I did everthing before except - disconnect the battery terminal.

Disconnected battery (resets the PCM) then perform TPS/Idle learn.

all is good.

:hatsoff: Thanks for reporting back what fixed it...

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