Question about 1996 Toyota Corolla

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96 corolla has no voltage at fuel pump, i have 12 volts at efi relay, relay checks good, no voltage at circut relay behind radio, circut relay checks good, does the engine control mod have anything to do with this?

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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

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I have a 2002 Honda 954RR. The fuel pump is not kicking on when I turn the key. How do I check the fuel pump relay to see if its working


the fuel pump relay has 4 leads. one is positive to battery, one is negative, ground, one is input voltage(on/off), and one is load (to the fuel pump +). Locate a 12 volt dc power source and connect the negative to the relay ground, and the positive to the relay input voltage lead. When 12 volts is applied to the input voltage, you should hear a click of the relay opening- additionally, if you have a multi-tester, you can also check for continuity (resistance, ohmage) by connecting the multi-tester to the 2 other leads. when the input voltage lead receives the 12 volts, you should hear a click AND the multitester should detect continuity in the circuit, and lose continuity when the 12 volt is removed from the input voltage lead.

Jan 11, 2017 | Honda Cars & Trucks

2 Answers

96 corolla not getting fuel, have spark, new fuel pump, fuses and efi relay good, have discoved that direct power to FP at the dlc will start and run but dies when disconnected, does that mean the circuit...


it should have power always if circuit opens I would think it would shut off like turning the key off to stop running good luck hope this helps

Mar 03, 2015 | Cars & Trucks

1 Answer

I have 1987 Chevy Silveraldo Fuel Pump lost its 12 Volts


i had the same problem, its the fuel pump relay, pull the relay, pop off the plastic top, insert a shim so that the points are always touching, the other thing it could be is the pigtail connector coming off of the fuel pump inside the tank, chronic chevy problem

Jun 11, 2017 | Ford Taurus Cars & Trucks

1 Answer

I have a problem with a fuse to EFI toyota corolla 2003


Hi there:
Sounds like to have a fuel pump that is shorted out or has too much resistance, this can cause to much of a current draw and blow the fuse. The EFI fuse supplies voltage to the EFI relay and then the fuel pump.

Hope this helps; also keep in mind that your feedback is important and I`ll appreciate your time and consideration if you leave some testimonial comment about this answer.

Thank you for using FixYa, have a nice day.

Jul 13, 2012 | 2003 Toyota Corolla

1 Answer

Dodge 1500 1995 pickup 7.5 volts to fuel pumpwill not start applied 12 volts pump runs book sayes pcm de-energize booth relayes and will not send proper voltage to fuel pump


There is a red and white wire feeding the fuel pump relay from a 30 amp fuse. Both the shutdown relay and the fuel pump relay are grounded by the PCM, so if the fuel pump relay is grounded it should be "on" and providing a direct link from the pump to that fuse.
You should have battery voltage on that 30 amp wire before the relay and then on the dark green and black wire going to the pump.
If you don't have battery voltage coming from the 30 amp fuse, the problem could be before the fuse.
That 30 amp fuse is hot all the time, so it is powered by a fuseable link coming off the battery.

Jun 24, 2012 | Cars & Trucks

1 Answer

G16b no spark efi


The fuel pump relay has four pins. Two pins relate to low power switch circuit from the ECU and the other pins relate to the high current switched circuit which has a permanent power in and switched power out (to fuel pump). Check that the ground on the lower switch circuit pins is good and then check that when the ignition key is in the 'on' position that the low power switch pin has 12.6ish volts supplied to it. If there is no low power switching supply then the relay cannot function. If there is low power supply but no voltage switch on the output then the issue sounds like the relay itself. Pull the relay out and check that it clicks when 12v is dropped across the low circuit pins. Check the resistance across the high current output circuit pins when the low pins are given 12 volts. As 12 volts is applied across the low voltage pins the resistance across the high current output pins should drop to near zero as the internal contacts are closed. As the low side voltage is removed the high side pin resistance should once again register open circuit (infinite resistance). If the relay clicks but fails to output then either replace the relay or open it up and get a nail file and draw it between the contact pins to remove any corrosion.

May 23, 2012 | Cars & Trucks

2 Answers

1995 toyota camery is there a fuse or relay for the fuel pump


The fuel pump doesn't have a single designated fuse, it gets electrical input voltage from several sources, the fuses tart you need to check are the 7.5A ignition fuse, the 15A EFI, the 15A starter. There are two relays that are involved, the circuit opening relay located behind the glove box and the EFI main relay located in the fuse box under the hood, the most common problem when there is no fuel pressure is the fuel pump, check all the fuses and substitute the two relays to see if it solves the problem.

Nov 18, 2010 | 1995 Toyota Camry

1 Answer

Fuel pump voltage


Check for voltage level at the fuel pump relay.

Perhaps your relay is pitted or carboned up and sapping some voltage that way?

Relays should be pretty cheap....11-20 bucks to get a fresh one.

Good luck and be careful.

Mar 31, 2010 | 2001 Hyundai Accent

4 Answers

1985 Ford F-150 Truck (EFI) Fuel Problems


Same problem with my 85 F-150 5.0 EFI---turned out that the fuel pump relay under the hood was teriffically corroded on the inside (I opened up the relay to look inside). When I checked the voltage at the fuel pump it would show 3.5-6 volts instead of 12 volts.

I was thinking fuel blockage or perhaps failure of the in-tank pumps. Sometimes the truck would start and run, othertimes it would neither start nor run. Typically, if running it would stay running until turned off (where the relay had to break).

Changing the green fuel pump relay fixed the problem--12 volts now at the pump and no reoccurance.

Good luck--let me know if this fixed your F-150.

riippa@aol.com

Feb 14, 2009 | Ford F-150 Cars & Trucks

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