Input Voltage at FIPL Sensor
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Junior User
Joined: Sep 2007
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From: Versailles, KY
Input Voltage at FIPL Sensor
I've got a number of electrical issues, including a voltage leak somewhere. I've replaced the injection pump and remounted the FIPL (throttle position) sensor and the E4OD transmission is acting up. When checking the voltages there, I found that the input voltage was around 5.7V. Also, the output voltage where it was supposed to be around 1.1V was about .45. Shouldnt' the input voltage at the FIPL sensor be 12V?
T
T
Post Fiend
Joined: Nov 2004
Posts: 5,638
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From: Manitoba
The FIPL is a potentiometer ( variable resistor ) connected to 3 wires. The wires are power ( 5V ), ground, and the signal ( carries variable voltage signal to the PCM ). With the wires unplugged you should have 5V on one wire ( BK/W ) and no voltage on the other two wires. The O/W is the ground to the PCM. The DG/LG ( center wire ) carries the variable signal to the PCM.
With the FIPL connected, you should have 5V on the BK/W wire and a varying voltage between 1V and about 3.5V on the DG/LG and none
( very little ) on the O/W
Have you adjusted the fipl to specs.........
With the FIPL connected, you should have 5V on the BK/W wire and a varying voltage between 1V and about 3.5V on the DG/LG and none
( very little ) on the O/W
Have you adjusted the fipl to specs.........
Last edited by PLC7.3; Dec 2, 2007 at 09:16 AM.
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Junior User
Joined: Sep 2007
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From: Versailles, KY
Had a bad VOM. Taking readings with two other VOMs the input voltage was 5.04V. I got the sensor adjusted to a low reading of 1.07 and the high is 3.80. I am very much looking forward to this curing all my transmission shifting problems once and for all... ...but I'm not holding my breath.
T
T
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Junior User
Joined: Sep 2007
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From: Versailles, KY
Wow, what a difference a few tenths of a volt makes...! I hoped that the shifting might be better but it's almost like factory-new - well, almost... Anyway, the truck shifts quietly and almost un-noticeably from first through third; there is a very, very slight bump between third and fourth, but it's hardly worth mentioning.
I almost hate to tweak it further since it's working well now, but perhaps taking it from 1.07 to 1.00 might eliminate the tiny 3-4th bump. Any thoughts?
Thanks to all for your help.
T
I almost hate to tweak it further since it's working well now, but perhaps taking it from 1.07 to 1.00 might eliminate the tiny 3-4th bump. Any thoughts?
Thanks to all for your help.
T
Last edited by tomherrick; Dec 2, 2007 at 04:11 PM.
