MSefi.com read only forum (Jan.15,2018)

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:



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:





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.

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.

Thanks

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.

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

Thanks Brian!

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..