sleejay

first: 1989 gtu (obviously s5 n/a)

after checking codes and getting a 12 (TPS)
i searched and read many a post on setting the tps.

some deal with the 3 prong green connector
some deal with the actual tps connector

i used the black one coming out of the TPS as per the FSM. (yes i checked and set it HOT)

looking directly at it (the one that comes from the tps, male connectors) with the clip on top, the right prongs (top and bottom) are A and B, respectively.

fsm says that A and B are the narrow band reading. i set the tps to 1.2k ohms on narrow. then i opened the throttle to check the narrow WOT reading, which i believe is supposed to be 4k to 6k... i got 3k. i tried adjusting the screw with the throttle open, and couldnt get it to even reach 4k, so i released throttle, and adjusted the narrow back to 1.2k

cleared codes, checked codes, got a 12 again.

is there more i am supposed to do? i do not have the mazda test light... or any LEDs around. can i check resistance or voltage with my multimeter? what am i looking for? do i do THAT on the green 3 prong or the tps plug? <---(part thats really confusing me)

thanks

ilike2eatricers

You checked the resistance between the black and green wire right? It's supposed to be set at 1k ohms when warm. Did you do a slow sweep from closed throttle all the way to open throttle to check for dead spots or spikes along the way? What exactly does it say code 12 is? I'm too lazy to look.

sleejay

just says code 12 is TPS...
but after i set to 1k(ish) im supposed to use a check light on another plug? the green one by the pressure regulator? this is where i get lost... one light is supposed to light on isnt... i should be able to check that plug with my multimeter, and set until i get voltage where one light would be but not another... im so confused

yea i checked for spikes it was smooth. that is of course if i was even using the right plug

ilike2eatricers

I've never used the light method before but never had issues when using a multimeter. You dont have to use a check light, the multimeter is probably more accurate anyways.

Code 12: Throttle sensor (full range)
malfunction: broken wire, short circuit
fail safe function: throttle valve opening angle signal fixed at 20%

sleejay

what do i do? and what does it mean that the throttle is fixed at 20%? how do you do it with just a multimeter? i want to get this figured out before i gotta drive to work tommorrow i have like 3 hours of awakeness

SAiamNE

on the multimeter set it to Ohms (which measures resistance).

sleejay

yea ... i know...


...


and?

sleejay

ok maybe someone can tell me what to do after i set the TPS via the plug that plugs into the TPS? the black one with 6 prongs? every single faq or post i read about tps setting says its a 3 prong. im so lost.

ilike2eatricers

I dont know anything about a 3 prong connector. Maybe those posts were about s4s which only have one range unlike the s5s which have 2. What's your idle after you set the TPS to 1k ohm?

chano

i read somewhere that you cant measure the resistance for the full range sensor ( im not sure)

sleejay

idle is like 800... it WAS 1500 before, but i also futzed with the idle control screw on the UIM to bring it down there... its kind of rough

chano

i read somewhere that you cant adjust/measure the resistance for the full range sensor ( im not sure)

sleejay

so all i do is set narrow idle to 1k?

chano

why not trying to use the multimeter instead of the LEDs to check the voltage on the 3 prong green conector ( u searched this so you know what im talking about).

sleejay

wow

read my post. i do NOT have any LEDS or LIGHTS or the mazda TEST lights....
*ALL* i have is *ONE* multimeter.

my question all along is whether or not i should use the tps plug, or the 3 prong. fsm says tps plug. my only other question is 'so all i do is set narrow idle to 1k" [omhs]?

i dont do anything else?

ilike2eatricers

Just do it from the TPS plug. You can even do it with the TPS connector plugged into the harness if you back probe it. You can only adjust the narrow range.

sleejay

ok so after i set narrow idle to 1k, i dont do anything else...