Hello Everyone,

I'm having a problem with my TPS. I get code 7 as soon as I turn my CRX on. Anyway, I'm using the Shop Manual to try and figure out what the problem is but I've reached what I'm hoping is not a dead end- according to the manual I need a PGM-FI Test Harness. I was wondering if maybe I could just hook up my MultiMeter directly to the regular harness to get the readings. What exactly does the PGM-FI Test Harness do? Simplify the procress? I'd appreciate any help you guys can give me.

Thanks

BTW- Awesome Board

 

ya, i can never find mine in our special tools room. you dont need it. just backprobe the tps sensor. witht he throttle closed you should get 0.5V +- 0.02V, the do a sweep, slowly open the throttle and watch your meter, is should rise in voltage consistantly and end at about 4.5v.

closed throttle voltage is the most important, it HAS to be at 0.5v +- 0.02. if its not, you can lossen it and rotate the sensor relative to the throttle body till you get the right voltage.

btw, i BELEIVE its the middle wire you need to backprobe with the positive lead, the just gound the negative. but i havent done it in a while, just prod around, one is going to be 5v (reference) and the other will be 0v (ground). good luck, report findings.

 

First of all, thank you for responding. Unfortunately, my multimeter does not allow me to read volts in tenths. As of right now I'm simply getting a 1 at closed throttle and 4 at wide open throttle. Guess I need a better multimeter. I'm assuming the WOT reading is good because it obviously can't “pick up” the extra .5. Now, the closed throttle reading shouldn't even register, right? If it's simply rounding it off from .5 to 1, wouldn't it do the same for the 4.5 reading, making my WOT reading a 5 instead of a 4?

Thanks again for your help, it's greatly appreciated.

 

It can get pretty finicky, I'd try a more accurate multimeter, you can get it as close as .45/.47 at idle if you play with it.

 

buy, borrow or steal a better meter.

one more thing, have you ever replaced or messed with the tps? they come from the factory calibrated and are fastened with shear bolts as to not get tampered with. if the tps is installed with regular bolts, then its probably been replaced or messed with. if it still has the factory shear bolts with no dents or scratches, then your tps is probably bad, or not wired correctly.

soeaking of wiring, you should probably check for continuity from the tps plug to your ecu. good luck.