VW Throttle body and TPS

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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Juliemac
MegaSquirt Newbie
Posts: 16
Joined: Fri Jan 13, 2006 4:29 pm
Location: Up State NY

VW Throttle body and TPS

Post by Juliemac »

I bought a car with MS installed. The PO did a horrible job wiring the car (All one gauge/color wire).
In making a new harness, I got to the TB. It has a 3 pin connector socket as well as a cable with 3 pins. TPS was wired to the cable connetor.
I cannot read any values on the multimeter on the cable, but can on the socket.

I am assuming here (and all that applys) that the position potentiometer is main resistance across the 2 outer pins and the wiper on the center of the 3 pin socket.

Is this correct?
1981 VW Scirocco w Turbo 2L 16v
trakkies
Super Squirter
Posts: 1162
Joined: Tue Dec 30, 2008 3:06 am
Location: SW London, UK

Re: VW Throttle body and TPS

Post by trakkies »

Juliemac wrote:I bought a car with MS installed. The PO did a horrible job wiring the car (All one gauge/color wire).
In making a new harness, I got to the TB. It has a 3 pin connector socket as well as a cable with 3 pins. TPS was wired to the cable connetor.
I cannot read any values on the multimeter on the cable, but can on the socket.

I am assuming here (and all that applys) that the position potentiometer is main resistance across the 2 outer pins and the wiper on the center of the 3 pin socket.

Is this correct?
Check by rotating the wiper to one end. You should see a near short between the track and it. Do the same at the other end. This way you can see what is the ground for the track and 5 volt feed too.
Dave P, London UK.
Rover V-8
MSII V3
EDIS
Tech Edge Wideband
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