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1994 Lexus Blows EFI fuse and vehicle will not start. replaced both EFI and circut opening relays to no avail.

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6ya6ya
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Posted on Jan 02, 2017

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  • 15 Answers

SOURCE: EFI FUSE BLOWS

u can use a headlight to find the short use a old style headlight usually 3 prongs use some 14 guage wire and hook to prongs to head light and run the other end of the wires where efi fuse goes turn key on the headlight will light up as long as there is a short , u can then start wiggle wiring or unplugging engine sensors till headlight goes out when it goes out you have found the short

Posted on Dec 27, 2008

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SOURCE: My 4runner blows EFI fuse when putting car in gear ( D or R )

Solenoid valves from transmission gear 1 and 3 needed to be replaced.

regards

Posted on Dec 30, 2008

yotaguy
  • 232 Answers

SOURCE: 96 corolla has no voltage at fuel pump, i have 12

Yes the fuel pump/relay is tied to the ECM,but its also tied to the park/nuetral safety switch also.

Posted on May 09, 2009

  • 1861 Answers

SOURCE: efi 15 amp fuse blows after short run time 22re engine 91

You have a bad fuel sending unit bracket, on top of your fuel tank. This is a VERY common issue. Frop the tank down, you will see the problem. Replace the bracket, and you will be good to go.

Posted on Jun 11, 2009

  • 199 Answers

SOURCE: I blew some fuses in my 1998 Lexus ls 400, i

check under the hood for more fuses.

Posted on Jun 22, 2009

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1 Answer

92 lexus no check engine light comes on at any point and wont start


check the EFI fuse in fuse box , if good then check EFI relay

Apr 17, 2017 | Lexus Cars & Trucks

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I have a 95 lexus that wont start now but i checked for fuelpump relay and there is not one were it shows should be i can start with starting fluid so my fuel pump is not coming on


Number 3 pin @relay sends power to the fuel pump
(green wire), pin 2 (green/red gets grounded by the fuel injection power train computer, pins 1 AND 4 GET POWER THROUGH THE CIRCUIT OPENING relay, and EFI relay. Fuses in the circuit are, 10 amp fuse marked IGN and 20 amp fuse marked EFI. God-Bless ! this is for a 95 lexus LS400,

Oct 31, 2016 | Lexus Cars & Trucks

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EFI 15 A fuse keeps blowing


check for a dead short in starter relay , wiring etc after the fuse

Jul 17, 2016 | 1998 Toyota Sienna

1 Answer

1996 Lexus 400 where fuel reset


To answer your question specifically it would be no. There
is no inertia switch that feeds the fuel pump that can be turned off or reset . The engine control computer turns on a series of two different relays to control power to the fuel pump. When in the start position the circuit opening relay and the fuel pump relay or both energize causing the fuel pump to run at full pressure or fast speed. From there the engine control computer determines which demand is on the fuel pump and either turns off the fuel pump relay and leaves
the circuit opening relay on to supply power through a resistor to slow the pump down for less demand. The EFI main relay is the main supply relay to both of these sub relays. The fuel pump is powered up ultimately by the 20 amp EFI number one fuse. All of these components are located in the fuse box under the hood. If the circuit opening relay is not working it's powered up by the 10 amp
ignition fuse inside the vehicle. It's unlikely it is the 10 amp ignition fuse because that powers up a lot of other things also.

May 16, 2015 | 1996 Lexus LS 400

1 Answer

15amp efi fuse blows


It is not related to car being cool down , I think you are having ignition switch on . The EFI fuse goes directly to the contact switchin the EFI relay. Maybe try removing the EFI relay, turn the ignition to ON, and see if the fuse blows.
Doing this, the car won't start, but it might give you a clue as to where the short circuit is located. ... Check the fuse/relay box next to the driver side fender in the engine compartment.

Apr 03, 2015 | 2003 Pontiac Vibe

1 Answer

Why does my efi fuse keeps popping 1999 chevy prizm


Pull the EFI relay, replace the fuse, and see if it blows when you turn the key on. If it does not turn the key off, reinstall the EFI relay and remove the circuit opening relay/fuel pump relay. Turn the key on. If the fuse blows than we know the problem is One of the O2 sensors, the IAC, the purge solenoid, or the ECM You can unplug the O2 sensors, iac, and purge solenoid. Replace the fuse, turn the key on, and plug them in one at a time until the fuse blows. Replace that component. If the fuse blows with those unplugged than its probaly the wiring and possibly the ECM. let me know what you find and I'll help you more if needed.

Aug 05, 2012 | 1999 Chevrolet Prizm

1 Answer

I have a 94es300 i crank it it starts up runs 5 mins shuts off like not getting enough gas changed fuel pump, fuel filter , fuel pressure regulator and ignitor still same whats up with this car


If you changed the fuel pump and the fuel filter and ignitor and regulator,in the list of changes do you know you have a EFI. The EFI main relay turn on the fuel pump which includes the circuit opening relay. Testing it mainly passes with flying colors just replace

Mar 20, 2012 | 1994 Lexus Es 300

1 Answer

Where is the in line fuse on fuel pump for 1994 toyota camry


There is not one on the 4-cyl just for the fuel pump. It is supplied by the EFI 15A fuse thru the EFI main relay and the circuit opening relay. See here p 177

http://www.turboninjas.com/camry/eg1.pdf

On the V6 it is similar, see p 575

http://www.turboninjas.com/camry/eg2.pdf

Mar 11, 2012 | 1994 Toyota Camry

1 Answer

My 1991 toyota 4runner keeps blowing the efi fuse and my engine floods gas. what could be the problem?


Check the EFI main relay, the circuit opening relay, and the fuel pump relay. Inside the fuel pump relay there is a switch controlled by a coil. During start, the fuel pump gets full power for a couple of seconds to build up pressure. Once pressure is good, the fuel pump relay is supposed to switch (via the coil) the fuel pump to reduced power. If the coil in the relay is bad, the reduced power setting is not available and the fuel pump will run at full power all the time. At this heavy current draw, it won't be long until the EFI fuse blows. This would also give more pressure than is necessary to the cold start fuel injector which runs on a timer. This extra pressure during the time that the cold start injector is operating may be the reason the engine is flooding with fuel.

Jan 29, 2011 | 1991 Toyota 4Runner

1 Answer

Fuel pump


Yuck, that sucks. best guess is malfunction in the body control module circut. factory anti theft uses ground circut disable to keep the car from running without the key. try disconnecting the negative battery cable, wait 10 min. and remove the BCM fuse and any fuse that is related to the vehicle security system. re-connect the battery and try it. if it runs the the fuel pump most likely has a ground issue that was overlooked during replacement.

Feb 24, 2010 | 1994 Lexus GS 300

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