Question about 2000 Honda Civic

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Is the fuel pump relay different then main relay

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No idea what your asking

The fuel pump relay has to be for the
fuel pump,nothing else

You need a wiring diagram to work on a car
& figure things out

Posted on Jan 03, 2013

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Posted on Jan 02, 2017

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1 Answer

2000 mazda 626 new fuel pump still not geting fuel new relay also


Well it definitely sounds like you have a fuel supply issue with the starting fluid check. The fuel pump relay is controlled by the PCM with input from the immobilizer system. Power for both the coil and switch within the fuel pump relay is supplied thru the Main relay. I would first remove the fuel pump relay, turn key to on position and use a test light to see if you have power/voltage to 2 of the 4 pins of the fuel pump relay plug in connector. If you do then the main relay and all related fuses are ok. You could then bypass the relay altogether by using a paper clip or other jumper wire to short between pin 30 and 87 or 87a on the relay connector. Pin number is located typically on the relay near the electrical plugs but since you have a new relay is probably not worth the test. The last thing is to see if the relay is being energized by the PCM by grounding the magnetic coil circuit. This is most probable. If your security light is flashing on cluster display then PCM is not grounding the relay as part of the security system. Now would be the time to ask it you are using a new key or different key to start the vehicle. The key has a chip inside that needs to be programmed for the engine or immobilizer computer to recognize as a valid and authorized key to start the vehicle. It immobilizer and pcm do not recognize the key as being authorized to be used then it will not power up the fuel pump relay and kill the fuel supply system.

Nov 13, 2015 | Mazda Cars & Trucks

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

93 geo prism fuel pump fuse location?


why not just use voltmeter, to check all fuses for hot both sides? key on. (need a video?)_
why not post symptoms then ask a question.?
must we send for ever looking for that which doesnt exist.?
and did you know there is more than one engine?
and both are wired different with different EFI systems?/
4A or 7A? engine, its a toyota corolla btw.


eg:
pump pressure is zero. (gages)
i check relay, the FP relay is closed.
i check the relay input and no 12vd.
sure bad fues, is there is one.
but on many cars , lots of other things go dead too. with this fuse.

ill now guess 4a engine with coin toss. vin code 6, engine,
i open glove box. and see the book the opr guide (yes buy one)
and turn to fuse page.
or login to alldata.com and stop guessing.
i look under prizm and corolla, 93 for best clues. (big hint, wink)


this EFI has 2 relays, one is the main relay,
other is fuel pump
the main sends power to the pump relay.
so there are 2 fuses,
one is marked
EFI-Fhtr fuse
and
IG coil. fuse

the main relay drops out of the transmission A/T is not in park or netral.
if manual stick car, the clutch switch does the same

alldata.com

look up your car, your trans, your engine.
and see the schematics.




Aug 28, 2014 | 1993 Geo Prizm

1 Answer

Dont know which fuse operates fuel pump


) Unplug the main relay and then turn the key from off to ON(II).

2) Use a jumper wire or paperclip to jump terminal 1 to terminal 7 in the main relay plug. Does the fuel pump run?

3) Now use the jumper wire or paperclip to jump terminal 5 to terminal 7 in the main relay plug. Does the fuel pump run?


picture_6583.jpg

Jan 05, 2014 | 1994 Honda Civic

1 Answer

I have a 1996 Acura 3.5 R.L. just put a new fuel pump in and it won't start. It turns over, but will not stay started.


Check your main fuel relay.



Fuel Supply System


PGM-FI Main Relay


Description


This PGM-FI main relay is located behind the dashboard


lower cover. The PGM-FI main relay actually contains


two individual relays. One relay is energized whenever


the ignition is on. It supplies battery voltage to the PCM,


power to the fuel injectors, and power for the second


relay. The second relay is energized for 2 seconds when


the ignition is switched on, and when the engine is running.


It supplies power to the fuel pump.


PGM-FI


MAIN RELAY



FUEL


PUMP


RELAY


Relay Testing


NOTE: If the engine starts and continues to run, the PGMFI


main relay is OK.


1. Remove the PGM-FI main relay.


2. Attach the battery positive terminal to the No. 3*


terminal and the battery negative terminal to the


No. 2* terminal of the PGM-FI main relay. Then


check for continuity between the No. 5* terminal and


No. 2 terminal of the PGM-FI main relay.


• If there is continuity, go on to step 3.


• If there is no continuity, replace the relay and


retest.



*: 8P CONNECTOR


To FUEL PUMP


3. Attach the battery positive terminal to the No. 4 terminal


and the battery negative terminal to the No.


7* terminal of the PGM-FI main relay. Then check


that there is continuity between the No. 3 terminal


and No. 1 terminal of the PGM-FI main relay.


• If there is continuity, go on to step 4.


• If there is no continuity, replace the relay and


retest.


4. Attach the battery positive terminal to the No. 1 terminal


and battery negative terminal to the No. 2*


terminal of the PGM-FI main relay. Then check that


there is continuity between the No. 5* terminal and


No. 2 terminal of the PGM-FI main relay.


• If there is continuity, the relay is OK;


If the fuel pump still does not work, go to Harness


Testing on the next page.


• If there is no continuity, replace the relay and


retest.



To PCM CONNECTOR


TERMINAL A4


To ST. SWITCH


To GROUND


To IGN. 1 To BAT


To PCM


CONNECTOR TERMINALS


A13 and B1


FUEL PUMP


RESISTOR


FUEL PUMP

Sep 18, 2013 | 1996 Acura TL Series

1 Answer

I have a 1994 caravelle with 4.3 v6. The fuel pump does not run when starting or after it starts. It will run if you jump it off of battery. I've checked wires and anything I can think of but still no...


Try a different relay for the fuel pump relay. Manufacturers often use the same part number relay for different circuits, different uses. If a different relay doesn't work, use a test light and check for power at the relay. One terminal where relay plugs in should have power at all times-this is the power that relay will pass to the pump when relay is energized. If no power, check, it may only have power available when key is on. When key is held in crank, two relay terminals should have power, the main feed and the signal from computer that turns relay on to pass power.

Jun 04, 2013 | Cars & Trucks

1 Answer

Honda civic wont start because of the alarm


did you try the main relay which is next to the fuel pump relay ..(the brown relay next to the blue(fuel pump relay) behind the glove box they are known to go as well and also i think the fuel pump relay feeds power of the main relay.

Mar 07, 2010 | 2001 Honda Civic

2 Answers

Honda accord


The main relay on 1992 Accords are considered a dual relay. It controls both the ECU and the fuel pump in tandem.

Sep 09, 2008 | 1992 Honda Accord

1 Answer

84 accord no fuel feed


you need to put a test light on the fuel pump and make sure you are loosing power when this happens, it could be the main relay those are common im not sure if this year have a differant style as the newer cars but either way it could be failing you need to check the fuel pump relay when this happen also for power and ground if that is not the problem your ignition switch may be faulty try wiggleing it to recreate the promblem please rate -jeff

Sep 05, 2008 | 1984 Honda Accord

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