MAP Sensor and TPS have no power!!!

[SuzukiRidr326]

ok i have a problem, a while back iwas workin on my bros 97 GSX w/ 6-bolt swap and i accidentally touched two prongs together in the o2 sensor and shorted out the ECU ground, i fixed that and now the TPS and MAP sensor have no power. Are there fuses that run those 2 or is there a prong on the ECU that i might have fried and not know about? Any help will be much appreciated!


Thanks in advance,
Jon B

 

[Tyeler18]

there will be prongs on the ecu for sure, i highly doubt they have fuses though as the fires run directly into the ecu, i would either get a new harness (which will be a pain) or get a new ecu (which could still be a pain) and if the harness doesnt work then you shorted the ecu, if the ecu doesnt work then you shorted the harness

 

[nad1]

Holy cow man, this sounds like exactly what's going on with my car, I swapped my o2 housing and now I'm having a problem with my MAP sensor and TPS.

How did you fix the issue, did you have to replace the entire ECU?

 

[Tyeler18]

^^ he hasnt fixed it yet, thats what he is trying to figure out

 

[nad1]

He said he fixed the shorted out ECU ground, I wanna know how he narrowed it down to that and how he fixed that.

 

[SuzukiRidr326]

when i first fried the ground the car wouldnt run worth s**t, then i did some research and found a post about the ECU ground, i took out the ECI and looked and the very end where the ground is located and there it was, the very very thin piece of copper was fried off so i had to(with steady hands) solider on another piece of speaker wire , then i put it back in an it ran liek normal, then the TPS and MAP didnt have power, so i gotta take out the ecu again and check out those pins, which i did end up finding on another site,


MAP Pin(aka barometric pressure sensor)-85
TPS Pin-84

 

[nad1]

Hmm, so I may have to solder the ground back on? I guess I'm gonna be taking my ECU out tonight. Now I know who to run to when/if I find out that I fried the ground to the ECU

I'm thinking this is the issue, my car won't run worth a crap, and my battery keeps getting drained.

 

[SuzukiRidr326]

yea, just make sure before you solider it that the area is clean of any left over pieces, and it down to bare copper

 

[SuzukiRidr326]

heres what i used, if u need any help findint the pin this will really help ya out

 

[nad1]

Yep dude, that's exactly what's been burned on my ECU. Wow, well I'm sorry I couldn't help you out on your thread, but I'm sure glad you were willing to help me out even though I sorta hi-jacked your thread. Thanks a bunch man.

 

[SuzukiRidr326]

haha its no problem, glad i could help ya out man

 

[Colt4G63 also]

What kind of power are you looking for at the TPS? There isn't a 12V input to that. There is a 12V input to the MAF, but it's the same circut the CMP, and CPS run on. It would help a whole bunch if you could say what wires you are having a problem with.

 

[kergilman]

F.Y.I.

My ECU had an issue with the voltage regulator (which is internal to the ECU in my case) and needed to replace it. I found these guys on ebay and did a swap for just $199. They send you a rebuilt and updated ECU, which you will install and verify everything is in working order, then send your old one to them w/ a pre-paid UPS label.

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