Checking ICP Voltage with a volt meter - Ford Powerstroke Diesel Forum
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Old 02-28-2012, 06:42 PM
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Checking ICP Voltage with a volt meter

Ok I am trying to get my tune tweaked and Chris at TSD wants me to check ICP voltage. I want to make sure that this is an accurate way to check it. I do not have an Edge or auto enginuity so I have to do it the old school way with a volt meter. Someone tell me if this is correct:

1. The ICP sensor has 3 wires going to it.
2. Brown/white, dark blue/light green, and gray/red.
3. Strip back db/lg signal wire and touch with positive lead from volt meter.
4. Strip back gray/red ground wire and touch with negative lead from volt meter.
5. Get someone to crank the truck and watch the voltage as they raise the rpm.
6. The voltage should increase up to 4.5 or 5 volts at WOT. But should not be bouncing all over the place as rpm increases.
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Old 02-28-2012, 09:11 PM
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The ICP is on a closed loop, so sitting in park you may not reach the 4k psi. The PCM adjust according to load on motor. It would be best to be driving so a load is put on the motor. I'm not sure if scangaugeII can read ICPv or if the SCT can datalog ICPv, I never used Liveload to see if the PID is available for the SCT.
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Old 02-29-2012, 07:14 PM
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Thanks man! I did not know that the ICP was load sensitive. I called SCT support and if I hook my laptop to my livewire I can use a thing called Livelink and it will show ICP counts and duty cycle. Neither of them are the voltage. He did say that the counts can be converted over to voltage, but it really sucks that they couldn't make a PID for the livewire to monitor this when other monitors do.
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Old 02-29-2012, 07:56 PM
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The DashBoss for Apple devices can. If you already own a iPad/iPhone/iTouch, then you can have a monitor solution for $280.
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