No voltage at TPS

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08-09-2007, 09:11 PM

#11

mattdel

6th Gear Member

Join Date: Nov 2006

Location: Spfld, MA

Posts: 9,240

RE: No voltage at TPS

becuz the 5v reference is looped around between the sensors, and it originates at the MAF

08-09-2007, 09:14 PM

#12

stang8689

6th Gear Member

Join Date: Jan 2007

Location: Milford, Delaware

Posts: 5,464

RE: No voltage at TPS

mattdel is a pretty smart guy even though his pic makes him look dumb

08-09-2007, 09:14 PM

#13

ColinK82

Thread Starter

Join Date: May 2007

Posts: 34

RE: No voltage at TPS

really? hmmm
so your thinkin maybe a loose or broken wire around the MAF, or even the maf itself.
but no check engine codes came on for that so i dont think it's the sensor

08-09-2007, 09:19 PM

#14

ColinK82

Thread Starter

Join Date: May 2007

Posts: 34

RE: No voltage at TPS

looking at a wiring diagram here, and those 2 dont seem to intersect at all.
black is ground.
and red goes straight to the computer ( sensor signal feed ) PIN 46
and green also goes straight to the computer ( Throttle sensor feed ) PIN 47

08-09-2007, 09:22 PM

#15

mattdel

6th Gear Member

Join Date: Nov 2006

Location: Spfld, MA

Posts: 9,240

RE: No voltage at TPS

ah, right. my fault, thinking of a different system.

yah start tracing wires, broken somewhere

08-09-2007, 09:40 PM

#16

mattdel

6th Gear Member

Join Date: Nov 2006

Location: Spfld, MA

Posts: 9,240

RE: No voltage at TPS

it has to be the red wire, somewhere.
even if the ground was bad somehow, the 5v reference would still come though, just the TPS wouldn't output a signal.

08-09-2007, 10:41 PM

#17

Joel5.0

5th Gear Member

Join Date: Jan 2006

Location: Puerto Rico

Posts: 3,926

RE: No voltage at TPS

Check the 5vdc VREF at the other sensors it is shared with (EVP=EGR sensor & BP/MAP sensor)....also check it using a good ground or the battery (-) post, if 5vdc show up .....the SIGRTN circuit could be fubar.