I FIGURE THAT IT IS OPERATED BY THE EDC OF THE CAR.
ECU (or PCM)
it has no injector relay , actual
only main, and fuel pump.
the full schismatic of that sections is below.
no guessing now. the car is Corolla , in truth
electronic drunk controller?
could be, if you drink E10 and up fuel.
LOL !!!!!
there no such relay period. (main yes, fuel pump yes, but not injectors)
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No symptoms posted.
no engine, either, 4AFE or 7Afe? they are different
so not saying what engine,makes diagnosis more hard.
the toy engine it is. and has no injector relays,
but my guess you need a real schematic with real names, right, so here it is.
Main , relay and fuel pump relay is the name.
and simple tests.
if the CEL lamp glows main is OK and ECU has Power.
12vdc power.
that leaves mr. fuel pump relay.
first are some (corolla/ prizm facts)
http://www.fixkick.com/PRIZM.html
now ill guess its the 7a engine
with 4 injectors
see main?
the whole 7a engine is here, if you have 4a, now is the time to say so.
7AFE schem. 3 pages. read them and see what is there then ask how to test it ?
http://ge.tt/3rZZb8M2/v/0
there are 2 relays, one is called main
other is called fuel pump
there is no dedicated injector relay!; PERIOD. 7A ANSWERS.
in fact, the injector power comes from IG1 lug on the ignition switch. via 1 fuse.
and the injectors are each fired by 4
injector driver transistors inside the ECU.
EFI logic 101
if the ECU see seens up to 5 errors, (lost spark 4 ways) then by law it cuts injection
preventing classic TV; crash and burn.
that is how it works.
and here are the 5 errors.
1: lost spark
2: CMP dead (SENSOR) DISTRIBUTOR
3:CKP DEAD IF PRESENT. (NOT THIS YEAR)
4: TACHO LINE DEAD.
5: IGNITOR DEAD.
BY DESIGN AND LAW.
the 7afe engine is wired just like this and works , like most cars made today.
no relay....
need full 3 page full size drawing have it. ask.
The ECU runs the injectors .TOTALLY!
if the fuse blows, you lose it all.(main)
so its not fuse.
note the center relay there, Fuel pump
the pump will run unless the
ECU enables it AND, the engine cranks.
for the crank signal to reach the pump relay
you need, the Park/neutral switch to work.
if a/t trans.
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