no voltage at iac
Joined: May 2004
Posts: 3,811
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From: Bett-neee
RE: no voltage at iac
thats odd... disconnect your batt (neg cable) and pull the cannon plug that the iac wire/wires goes into and make sure theres no corrosion or bent pins... also.. shoot continuity from the respective pin/pins to the base of the wires..making sure there isnt a break in the plg its self .. trying to rule out all possiblities.. i think if you took the truck to the stealer (god forbid) they might be able to scan the computer for circuit faults.. also .. it may be worth while to change the iac,,, maybe the internal circuitry isnt connecting the circuits and giving false readings or data to the pcm. but thats kinda shootin in the dark
Registered User
Joined: Feb 2018
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I tested for voltage because the truck has a rough idle. The pintle on the IAC would not move so I bought a new one and that didnt help the idle problem. The Haynes manual said to check for voltage between the purple/black wire + and the brown/white wire - . Since there is no voltage I figured the pcm was bad. The computer has not thrown any codes but the IAC is not working , will not adjust idle when AC is on etc.
Administrator
Joined: Apr 2010
Posts: 87,437
Likes: 4,218
From: Clayton MI
12 year old thread.......
You should see 12 volts on two wires in the iac connector, with the ignition on. (engine not running) If you don't, verify the wires are good, if they are, replace the PCM.
You should see 12 volts on two wires in the iac connector, with the ignition on. (engine not running) If you don't, verify the wires are good, if they are, replace the PCM.
Registered User
Joined: Feb 2018
Posts: 2
Likes: 0
00 ram 5.9 iac valve problems
Did u ever fixed your truck? If u did what solved it?
Administrator
Joined: Apr 2010
Posts: 87,437
Likes: 4,218
From: Clayton MI
Why don't you just start a thread with your problem, and see if we can help you. I don't think anyone that posted in this thread, aside from you and I, are even still around any more.
