93' Sidekick 1.6 16v engine, no spark :(

[fixkick]

if pin 3 is dead we work that back to the ECU and then the CMP pin
if CMP is good and Pin 3 dead that means
the ECU is failing.
top causes of the any power and ground pins to the ECU are bad, dead.

I guess the car has no CEL lamp now working, to see if ECU is even alive at all.
I also have on this site, the pages that show every voltage on every pin of 92 -95 ECU
to find the cause of any ECU to be dead for spark or fuel
the ECU runs it all, spark advance to is ECU firmware logic controlled

the ECU page for 16v old is here
https://fixkick.com/ECU/ECU16v_92-95.html



click page 1 and 2 here, all pin voltages from FSM are here, verbatim


https://fixkick.com/ECU/16v-ecu-pins.html


3 power feeds
and 4 ground pins
G110 is not optional ever on the real car the fire wall engine side had G110 there and must be grounded, i bet missing ,loose or rusty

Key on MAIN relay must be energized or ECU will be dead.

ECU pin B6 is +5vdc-ref, if 0v the ECU is off line , or has no power at all to operate
B6 is a output to run sensors that need +5vdc to operate

GEO or suzuki drawings
ECU
the letter A and B are swapped GEO to SUZ, ECU is same ECU but the GEO pages use silly GM prefixes reversed.

[Francixco]

Hello! Ok, I'll do the tests and tell you what happened, thanks.

[fixkick]

Hello! Ok, I'll do the tests and tell you what happened, thanks.

i forgot 1 detail  (cars) DC mode tests. Volts.
the meters black minus lead is best connected to the cars battery NEG lug
for sure testing, (meter red)
Igniter pin 2 (ground) black-blue,  must be key on 0vdc. if not G110 is bad.

same goes testing DIZZY pin 1, black, and uses the same ground G110 ,  only the original car had G110. 93,suz.
G110 was a fire wall mounted ground stud,  not see on any SAMMI,   if you get my  drift?

the lack of spark will be caused on the DIZZY side of ECU or the Igniter side. (or power to ECU is dead +12v and ground)

the pins that pulse happen slowly cranked and those pins cause the meter needle to wag. to those square waves.
good luck to you, !