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TPS issues (2G)

Kenny_Kline

Well-known member
Joined
Dec 27, 2007
Messages
789
Location
Seekonk, MA
Im having a TPS issue on a 2G. I am not getting power to the TPS. I was also not connecting to the ECU via ECMlink. Car barely idles and takes a lot of effort to keep it running.

TPS test:
Green/Yellow: .4v (Power for TPS)
Brown/Red: .4 (TPS output voltage)
Yellow/Red: 0v (IPS switch)
Black: 0v (ground)

So as you can see the TPS is not getting power to the TPS. I swapped the ECU from another car to see if that changed the problem. Still no power to the TPS but I can now connect with ECM link. So I traced the wire back through and found the MAF gets power from the same wire so I tested the wire at the MAF and that was getting 5v so I jumped the wire from the MAF to the TPS and now TPS output wire puts out .8v at idle and as you press the gas, the voltage goes up to 5v smoothly. I also confirmed proper function with ECM link.

Im going to send the ECU out to be checked out and repaired. The car ran fine up to this moment and the only thing I did was do a timing belt and flush the cooling system. Car ran fine still after the work but as soon as I plugged in ECMlink, it wouldnt connect and car started running like crap. I dont know what could of caused this but last thing I need is to plug the ECU in and have it happen again. Any ideas/suggstions to check what could of caused this?
 

Kenny_Kline

Well-known member
Joined
Dec 27, 2007
Messages
789
Location
Seekonk, MA
To add to this, the ECU I used to swap it in I put it back in the other car now that car is having TPS issues also and only getting 1.6v of power to the TPS and before it was reading fine!
 

GSTwithPSI

Well-known member
Joined
Jan 1, 2012
Messages
3,461
Location
SoCal
I'd love to help you out, but I need a wiring diagram. You have a link to a manual online?
 

bradrs

Well-known member
Joined
Feb 1, 2014
Messages
128
Location
Alta Loma, CA
My first suspicion would be that you have a short or near short between the 5V and the ground. That could cause the 5V power supply inside the ECU to be damaged when you leave it on/connected for too long.
 
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