Car starts only when AFM is unplugged? Options

[6G94celica]

So I had my car at a shop a couple months back and they shorted out my battery on my transmission. I have my battery relocated and hadnt gotten around to putting a fuse inline. Anyways what initially happened was the car drove but wouldnt produce any power under boost. I took it around the block and parked it to try and figure out the problem. Since then the car wouldnt start at all. The car had no check engine light when i was at ON. I checked by grounding W terminal on ECU and the light and wiring are fine it turns on. I then checked power to ECU and ECU grounds, all good. I was searching through the wires around the transmission where the short occured to see if any had been burnt through and had my intake and AFM removed from the car.

I noticed that when i turned the key to ON with the AFM unplugged the check engine light came on. Turns out the damn car started fine with the AFM unplugged. I didnt let it run more than a second because i didnt think that it was even supposed to run without the AFM plugged in. Does anyone know what caused this or what i should do. I thought about picking up another AFM but want to explore other options first.

Also i should mention that the power shorted on the topside of the transmission and the AFM sits on top of the transmission. Im thinking that the AFM was fried and the ECU reads it as a bad sensor and wont let the car start.

Any help is greatly appreciated

[bccentaur3]

The car will always fire up with the afm unplugged but won't run for any longer than 3 seconds. The ecu uses the afm for fuel delivery. So the car won't start with the afm plugged in?

[6G94celica]

No it just turns over no spark no fuel. I read in an older post by lagos of pressure2 that there is a way to test the afm with a multi meter in the BGB but I can't find that anywhere.

[Neon90424]

My sandrail would not start when my afm was plugged in and would start and roughly idle and accelerate while it was unplugged, It was because the hose from the AFM to the manifold was disconected. But that was with my 3vz-fe. Just throwin in my .02

[bccentaur3]

http://bgbonline.celicatech.com/90alltrac/FI/FI.htm

There ya go...

now test that puppy

[6G94celica]

So i tested the terminals here is what i got

VS to E2 supposed to be 200-600 Ohms, I got 200 at first and then it went down to about 115
VC to E2 supposed to be 200-400 Ohms, I got about 4 Ohms lol
THA to F2 supposed to be 2-3 KOhms, I got infinite it didnt register anything.

So im pretty damned sure that means its no good. any tips on how to fix it i know people have tampered with theirs before i wonder if theres been any luck.

These are the numbers i pulled off it if anyone has one i could buy. Its from a 93 ST185.

22250-74170 im guessing thats the part number?
197100-3721

If anyone has one let me know.

[Gary]

Do you know how the AFM was disconnected from the connector? By mistake, many people unscrew the two screws on the connector which ended up damaging the circuit board inside. The connector must be removed by unclipping the small metal clip. You can cut open the silicone cover and re-solder the connector back, if that was the case.

[6G94celica]

Actually yea the idiot at the shop did take those screws out. You think all I need to do is resolder that.

[presure2]

if he unscrewed it, and tried to pull it out like that, yes, he more than likely pulled the wiring off the board.
open it up and have a look!

[6G94celica]

Well holy **** it worked. Thanks everyone

[95CelicaST]

6GC saves the day!

[Gary]

Glad to help.