Question about 1995 Geo Prizm

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Have 95 geo prizm with no fuel pump relays and fuses are good. when i jump the relay i can hear the pump work.. is there any other sensors that would cause the pump not to work

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The oil pressure sending unit will stop the pump from running. This cuts the car off if it senses no oil pressure. Same sensor that gives you the pressure reading or the dummy light.

Posted on Mar 17, 2011

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The location of the fuel pump reset button on a 96 Geo Prizm if it has one.


No fuel pump reset switch. There are two relays that need to be energized to turn the fuel pump on. The EFI relay in the under hood fuse / relay box . Plus circuit opening relay . If the EFI relay is working you can test for B+ voltage at pin 12 at the DLC - data link connector , do you know what the DLC is an where it is located ? The circuit opening relay is located under the center console .
Disconnect the negative battery cable. Remove the center console. Remove the circuit opening relay (1) electrical connector. Remove the one bolt and circuit opening from the I/P bracket.
It look's to be on the right side support bracket under center console .Do you know how relays work ? You can go on you tube an check out videos on how to test relays !

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I FIGURE THAT IT IS OPERATED BY THE EDC OF THE CAR.

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95 geo prizm wont start


wont crank or will not start.? 2 unique things. no crank always results in , no start (unless you push start the car)
hot wiring the fuel pump relay or any relay in the EFI system , invites
blowing the ECU to kingdom come, bad to the bone that.
I fixed them for 50 years. (electronics controls, so know it !)
you do know its really a toyota right?
what ENGINE? each works different.
my prizm text dump.
89-02
joint venture, GM/toyota with 3 engine used.
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toy engine, 4aFE, 7AFE or 4AG
open hood look
or use the GM RPO tag
or Use the VIN to find motor used.
for docs?
ebay
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Geo Prizm factory service manual, Duh?

http://www.ebay.com/sch/i.html;jsessionid=D19D723C2EDB4A9FE12E7C01C0677129?_sacat=0&_nkw=geo+prizm+shop+manual&_nkwusc=geo+prizm+shop+manaul&_rdc=1


does car start with test fuel and run, until the fuel runs out.
do you have fuel pressure, while reading the FSM , way of doing it.
some cars only make fuel pressure, cranking and runing.
other make pressure, for 3 seconds key on, and cranking and running only, and all cars drop pump and injections when ECU sees spark die.
that is why stating which Toyota engine YOU HAVE, helps with diagnosis. and please stop hot wiring your car and learn to use a voltmeter. Ive seen $3000 ECU blown up do to bad mechanics.

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1 Answer

Where is the emergency shut off in a 1995 geo prizm?


All cars, EFI. (some have 3 fuse to operate ECU/spark/ fuel) check em yet?
check power to pump 12v cranking?
no, ? 12v, or 6v? (6v or near is corroded wires /conns)
check power (12v) from fuel pump relay cranking, got 12v there.
if yes , the the path is broken to the rear ) (inertial switch?, not in 95)
if not,12v now, the FP relay is bad or ECU is not turning it on.
if 12v is across the FP relay coil the ECU is working.
if 12v is across this relay, and output is dead, that is a bad relay
or the FI use feeding it is blown.
btw #1 all cars cut fuel (INJ) when spark is detected bad. (ecu)
btw#2 some (software) cut the fuel pump for same reasons.
btw#3, most cars, only activate the FP relay for 3 seconds key on, each time. and some cars only cranking, and running.
all these facts, need to be known to make progress, in EFI.
and more.

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1 Answer

FUEL PUMP FUSE


Not exactly.
There is a relay that is powered from the key switch and the EFI main relay.

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1 Answer

Location fuel pump relay on 95 geo prizm


this is a picture showing the fuel pump location, hope help.

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CHECK FAN FUSE AND RELAY.IF FUSE RELAY GOOD IF FAN DONT RUN WHEN ENGINE GET HOT YOU COULD HAVE FAULTY COOLANT TEMPERATURE SENSOR.

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I think it is under your rear seat cushion. Remove the rear seat cushion, you'll see the gas tank cover.

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It's probably a blinker relay. If you can find one, it'll probably be remanufactured or from a junkyard. Take it to the mechanic.

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