2001 elc,gulid efi fuel pump will cut out while driving ,

check fuses and relays --check inertia switch --test fuel pump and circuit

NOAH /Voxy 2001 to 2007?????????????????????
wow no year car told, , country told, engine yes. 2.0L
;done all wrong, sorry wrong
the PCM cuts injectors if it detects spark bad. all EFI gas engine do every one from 1990 to now,.MPI and TBI.(a key fact on EFI)
step1; check all fuses.
step2 scan the PCm ,omg , errors you are ignoring. ?

gue$$ing is super expensive, no? why not buy tools and nor guess.?
tools even pay for them self so are FREE< ROI free. econ101

the PCm cuts fuel for other reasons too,. even crash detection.SRS bags. or inertial switches tripped.
IMMO not happy, (antitheft, lamp on dash must be happy)
that means read the glove box guide in the IMMO key..
PCM cuts fuel of throttle (failures) stuck at wide open throttle.WOT
that is about it. Check spark next.
if all tests fail check cylinder compression above 150PSI all 4.

so you did not check spark first (after above fuse/scans)
did not try spray test fuel to the intake if spark is good. x4
chain drive cam 1AZ so that should be ok.
if have VVT make sure it is not dead or stuck wrong. a cam timing device. SOME DO.

did not check all fuses first, every one? for sure doing #1 wrong.

EFI
rules,
1a: do not do what you did with battery NEG lug connected. ever.!
2: EFI ,all in the world CUT fuel dead 1 or 2 ways if the ECU detects spark bad, ending as seen on TV crash and burn (FUEL *****)
sure perplexed ,as we all are on 1988 super old EFI crude as heck engine EFI, learn to do the blink codes on CEL?

more, if the pump runs for 1 second each key on as many do.
Called prime pulse) that means the PCM/ECU is not happy
fuses blown !!!!!
ECU cuts fuel for this list.
1: fuses blown
2: cmp or CKP dead. (ensors)
3; spark read back or tacho dead cranking, cuts FUEL DEAD !
ICM dead? is what makes tacho wire dead.
4: TPS wired bad such that , POT wiper pin is 3 to 5 volts DC.
this means wot mode or TPS throttle angle near 100% this activates
ECU's cut fuel mode , AKA,, unflood the engine cranking and cuts fuel
5; a bad PCM , working on EFI with BATTERY NEG and POS connected.
old ECU do not like any kinds shorts, you make messing with EFI parts
thus rule #1a , do not blow up ECUs is the rule.

I have bench tested, 88-95 ECU's
and learn all this, by using home made tachometer generators
and tested all inputs to learn that, what works and what does not work;. (and why)
when cranking some sensors are not used at all
or goes to limphome but does run. using crude limphom rules

for sure one input tot he ECU is dead wrong
well hope, that and not bad ECU./

which engine?
its on mitchell DIY, google that
it too will ask what engine.
most cars EFI, gas.
pump wire hot to ECU fuel pump relay.

Air suspension pump is at the right rear of the car.

Look in the fuse box in the engine bay near the battery for (Right Hand Drive models.) Look on the inside of the cover and you will see a 'map' of all the fuses and relays. Align the map to compare with the arrangement of fuses and relays in the box to make it easier. No fuel pump restart button. This guide is for petrol(gasoline) model.

1.6L or 1.8L vastly different engines... and EFI.
fuel to the rail , only means the pump is active , never good.
28PSI is minimum on all cars. 1psi will never start a car. ever
and the rail will shoot fuel, all day. it fruitless , unless the rail is dead.
see?
First the laws of EFI. (works all gas EFI)

1. all fuses good.
2. 12vdc to EFI system , below 10v is bad. (see lamps dim? bingo)
3. The PCM (EFI brain) will never inject if it sees CMP/CKP or spark primary dead. ever. so, spark is first.

that is double reasons, fuel cant burn if no spark and if ECU
thinks spark is bad it cuts fuel, (fire safety and fuel hydralocking reasons)

so you connect any scan tool to the DLC, OBD2 port , by knees.
and crank for 5 seconds, release key, no turn off
see DTCs (errors) for CMP, or CKP sensors (cam/crank?)
bingo
no, then you crank and look at the RPM PID , live data stream the scan tool, see RPM go to 250rpm cranking, good.
ok , PCM thinks all is good....

i then check the #1 injector with a NOID lamp
i crank it flashes, good.
if not , i do all injectors , if one fails the pcm is dead on this line.
if yes, all dont flash the PCM is seeing some gross errors. ask. why./?
if all flash, then the fuel rail is dead. and your rail test was useless.

until you discloses engine option (size) I cant give spec numbers.
i then connect my fuel pressure gauge $20 tool to the fuel rail test
port, and i get 10psi, FAIL
i check voltage to the fuel pump cranking, i get 8v, bingo bad wiring
or bad fuel pump relay.
say 10psi and 12v at pump cranking,
the pump is bad, or the filter clogged , or the fuel pressure regulator
is stuck wide open killing all legit pressure.

that is how i do it.
keep in mind the PCM cant see fuel pressure on most cars.
some newer cars have this sensors. (nice)
low fuel pressure,. renders the whole EFI , useless. just junk.

Have you tested the pump relay to see if it is sending power to the fuel pump ?

there is no such model on this car.
this car has EFI, in 1992 , the 8 valve has TBI injection and the 16valve G16B had MPI (4 injectors)
both engines the ECU, creates spark at all times.
the input to the ECU is CMP /CKL cam and crank sensors
then the ECU computes ADVANCE and then drives the ignitor
next to the Ign coil. the coil charges and the ECU release this
charge and BAM , mr. Tesla inductive spark. hits the DIZZY.
that is how spark works.

the ECU controls fuel not spark , or better the ECU controls
spark INDEPENDENTLY from fuel;. (with exceptions)
exceptions:
or are you asking about the fuel safety feature built in to all EFI
cars 1988 too now? that is the ECU does monitor Spark
and CMP and CKP and does in fact cut fuel, when the ECU
sees spark missing, yes. It cuts the INJECTORS !

as does , wide open throttle cranking cuts fuel. (injection)
and fuse is (fuel pump) cut after 3 second key on, unless you crank it or runs.

see block diagram here.
http://www.fixkick.com/ECU/EFI.html

why guess.?
ever seen a volt meter,?

cant get power when and where.? power is voltage.
do you have 12vdc at the pump cranking?
does car not start
why not post the symptoms so we can be on the same page.
why not?
i can walk you thru all fueling issues of any car.
why not post whats up;?
btw fueling is cut on all EFI if the EFI detects lost spark
so we check that 1st !

Fueling , EFI , is complex, (kinda) but is simple
the EFI dont fuel the engine, if there is no spark
or if it thinks you crashed, its a built in protection.

some cars inject and then stall in 2 seconds, due to , no spark.
the ECU monitors spark if it sees it drop dead, fuel ends.
even if spark is good. see why (answer, its a monitor)
the monitor works different on all EFI made.
fixed many.