7MGTE ISCV and TPS sensors

For discussing how to choose sensors and create a wiring harness for all Bowling and Grippo versions of the MegaSquirt® EFI controller.
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SuprAdam
MegaSquirt Newbie
Posts: 3
Joined: Mon Mar 13, 2006 9:28 pm

7MGTE ISCV and TPS sensors

Post by SuprAdam »

board: MSII V3.0
ignition: EDIS-6
engine: 7mgte

Hey...

1)
I am trying to hook up a stepper motor style IAC valve but am getting confused as my valve has 6 wires, the MSII uses 4. Can I still use this valve? (stock toyota 7mgte ISC valve). I know what the S1, S2, S3 and S4 go to but the B1 and B2 are not on the DB37, I am assuming they are just 12V power supply's? The board is setup to use a stepper style ISC. Here is the pinout for the connector:

Image

2)
The TPS that I have, also stock 7mgte part, has 4 wires, the wire diagram for MSII only has three. Can I use this still? Has anyone used this sensor before? I don't particularly want to have to hack my intake manifold to fit a different sensor.

Pinouts:

Image
Image
Image

Thanks for any insight, I am going to do some more searching to see if I can find out the values of each pin for either sensor.
GT40-82 powered 7MGTE
MSII V3 w/ EDIS-6
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AriK
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Post by AriK »

2) With a quick look it seems that the IDL pin is just a switch to tell the ECU that you are not pressing the pedal. So you can just ignore that and hook it up as a normal 3-pin TPS. Put Vref on the VC pin and ground on the E2. Then take out the value from the VTA pin.
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SuprAdam
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Post by SuprAdam »

Thanks :)
GT40-82 powered 7MGTE
MSII V3 w/ EDIS-6
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CPOM
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Joined: Mon Aug 29, 2005 1:02 pm
Location: BOSTON

Post by CPOM »

For the idle air control, do you have a more specific diagram for the wires as to what the abbreviations mean? I know that's not an answer but maybe you could compare the design of this valve with the standard 4 wire iac.
CHRIS
1992 Isuzu Pickup with a GM 3800 hopefully running via MSnS-e soon
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78Spit1500Fed
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Re: 7MGTE ISCV and TPS sensors

Post by 78Spit1500Fed »

SuprAdam wrote:...I am trying to hook up a stepper motor style IAC valve but am getting confused as my valve has 6 wires, the MSII uses 4....
According to the diagram, S1 and S3 are connected, S2 and S4 are connected. I think it would be safe to use either 1 and 2 or 3 and 4... I doubt it would matter.
SuprAdam wrote:2)The TPS that I have, also stock 7mgte part, has 4 wires, the wire diagram for MSII only has three...
E2, VTA and EC are the pins you need to use for the TPS.

-Brian
MegaSquirt License Plate Frames and Decals are available! PM me for more information!
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SuprAdam
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Joined: Mon Mar 13, 2006 9:28 pm

Post by SuprAdam »

Thanks Brian!
GT40-82 powered 7MGTE
MSII V3 w/ EDIS-6
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pimptrizkit
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Posts: 2
Joined: Sun Feb 22, 2009 11:21 pm

Re: 7MGTE ISCV and TPS sensors

Post by pimptrizkit »

as far as i know 4 pin's are ground control fromt he ecu and the 2 center pins on the iac are hot's. thats if i remember correctly..
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