'92 16v sidekick

[fixkick]

Replaced TPS. No start. Gray/red wire, top position, dead.
 
 Got into the ECU.  Pin B6, which feeds 5v to TPS (Gray/red wire) , .25 volts. Not good.
  Despite advice from fixkick, here's what I did:   (I hot wired ECU,........ I had nothing to lose):
Traced pin B6 back to its source, which is apparently a regulated voltage source, on its own board, mounted vertically on main board.  5 volts to B6 circuit absent there also.
  Looking at this from the end of the ECU which is AWAY from the connectors, this small board has 9 soldered connections on bottom, 4 on the left, 5 on the right.
I found 5 volts source at #1 on left, see images. Connected that to 2 & 3 of the 5 on the right with small wire.. DTC gone, CEL not on, runs like new.

thanks for  sharing.
16valve engine /ecu



sorry i thought you told me 5vdc was ok at TPS.
and yes your custom hybrid, device inside is a mess.
happens alot on these very old  Cars.

my ecu fix page states to check the 5vdc first,  for good reasons

here is the quoted text that confused me, sorry  (i get , got me, LOL)


"I get 5 volts, but no voltage at any time from the Gray/red wire, which I understand is the 5v reference voltage."
I thought  that meant ECU 5v is ok (I get)  and the wire was dead.  so all posts by me were are wrong, above.



The practice of hot wiring parts, naively is bad.  (hot wiring ECU or any sensor with ground or power blows them up)
blowing up traces, blowing up hybrid chip pins (the chip is not sold) or blowing up this protectors.

if the tps wire is bad, and grounds out  it blows up IC17
this one wire must be checked for  damage for sure under hood. where bad things can happen;
I also see, other crazy things folks do to that red/gray wire.
they use it  to power
alarms (BOOM)
they use it to run other added endless accessory< boom
or for Remote start kits from H3LL.
The best practices is to check that wire for damage , done by others or under hood by accident.
with hot wired, IC7 , next ground out, blows up the ECU. in my best theory . based on facts of parts.

or RED wire was hotwired to 12vdc BOOM>
seen this 10 times? me.