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Fuel Pump Relay location -- 2009 Civic

Old 12-16-2017
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Fuel Pump Relay location -- 2009 Civic

HELP!

I have a 2009 Honda Civic EX 1.8L with 110K miles.

I am trying to replace a fuel pump relay and cannot find a diagram for the under hood fuse/relay box.

Issue: The car has an intermittent problem of not starting. At first, I thought this was a bad fuel pump. Replaced fuel pump and everything was fine for a couple of days. THEN, the same not starting issue came back. If I let it sit for a day, then it will start.

In asking around, I heard about the "main relay" issue in Civics....tried to find the main relay in my 2009 only to figure out it did NOT have one. SO, I am now turning my attention to the fuel pump relay. Bought the part, but don't know exactly which socket it goes into AND there is no clear diagram that I can find.

I am also going to replace the plugs as the car has 110K miles.

ANY help is appreciated -- this seems simple and I am losing patients (with my ineptitude). THANKS!!
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Old 12-16-2017
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Re: Fuel Pump Relay location -- 2009 Civic

Relay for the pump is called PGMFI main relay #2, it's in the dash fusebox, extreme top of the box, center cavity
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Old 12-16-2017
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Re: Fuel Pump Relay location -- 2009 Civic

Originally Posted by ezone View Post
Relay for the pump is called PGMFI main relay #2, it's in the dash fusebox, extreme top of the box, center cavity
Thanks for the response! Here is a diagram on the fuse box that I have found. It does not list the PGMFI main relay on it. What am I getting wrong?

http://www.autogenius.info/honda-civ...e-box-diagram/
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Old 12-16-2017
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Re: Fuel Pump Relay location -- 2009 Civic

Originally Posted by redgar-atx View Post
What am I getting wrong?
That seems to only list fuses. Not relays.


There's an large section of the dash fusebox above the fuse area that is not shown in your diagram.
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Old 12-16-2017
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Re: Fuel Pump Relay location -- 2009 Civic

The dash fuse box:



The lower section of the dash pops off to gain access to the upper half of the fuse box
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Old 12-22-2017
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Re: Fuel Pump Relay location -- 2009 Civic

Thanks eZone -- is there anything that could give me a diagram of the whole box?

As mentioned:
1. Replaced the fuel pump...that worked for a while and then the problem started again.
2. Replaced the spark plugs...that worked for a while and then the problem started again.

I would like to replace the under-dash relay, BUT I am not sure if it really exists or it is some mythical unicorn relay.

My mechanic ( a really good guy and mechanic) could not find the problem. Everything worked fine. Got the car back home and the car AGAIN displays the following:
1. Car starts for a short period of time, but quits once put into gear.
2. Next the car will start very briefly then quits.
3. Next, I am just cranking on the engine, doesn't start.

It is _very_ frustrating. If there is ANYONE that has ANY clue I would be REALLY thankful.
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Old 12-22-2017
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Re: Fuel Pump Relay location -- 2009 Civic

Diagram? I gave you a pic of the whole underdash fuse panel
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Old 12-23-2017
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Re: Fuel Pump Relay location -- 2009 Civic

Originally Posted by ezone View Post
Diagram? I gave you a pic of the whole underdash fuse panel
And I appreciate it a lot. I am just trying to understand what is what. What is the first socket above the fuses? Does whatever that goes in that socket have a part number? I am just looking for a diagram that would go with that picture

I am just trying to fix a problem that seems to appear sporadically.

Thanks -- Truly
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Old 12-23-2017
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Re: Fuel Pump Relay location -- 2009 Civic

Again, top row center cavity holds the PGMFI main relay #2 for the fuel pump.
In these pics it's green or blue





After you get the piece of dash trim removed you can see this clearly









Parts catalog link (CLICK IT): http://www.hondaautomotiveparts.com/...BIN%29+%282%29
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Old 12-23-2017
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Smile Re: Fuel Pump Relay location -- 2009 Civic

Originally Posted by ezone View Post
Again, top row center cavity holds the PGMFI main relay #2 for the fuel pump.
In these pics it's green or blue





After you get the piece of dash trim removed you can see this clearly









Parts catalog link (CLICK IT): http://www.hondaautomotiveparts.com/...BIN%29+%282%29
OUTSTANDING!! THANK YOU!! Could not find anything like this -- Awesome! Merry Christmas!
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Old 12-23-2017
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Re: Fuel Pump Relay location -- 2009 Civic

Well....I got the new relay. Figured out how to take off the lower skirt. Replaced the part...AND...still not working.

eZone -- thank you for your help. SERIOUSLY, just showing me the diagram was like talking me off a ledge.

Need to figure out my next move.

Replaced fuel pump. And then it worked for a day.
Replaced spark plugs. And then it worked for a day.
Replaced both fuel pump relays. And that did not do the trick.

Seems like there is a bad relay or short somewhere. All the other electrical systems seem to be functioning.

My driveway is on a slight uphill slant and the problem seems to manifest itself when the temperature drops. Right now I am just reaching for anything.

Thanks again eZone.
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Old 12-24-2017
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Re: Fuel Pump Relay location -- 2009 Civic

When 1st going to II at ignition...Do you hear a buzzing noise a short time from rear then stop ??
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Old 12-24-2017
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Re: Fuel Pump Relay location -- 2009 Civic

Originally Posted by CraigW View Post
When 1st going to II at ignition...Do you hear a buzzing noise a short time from rear then stop ??
Yes, I have been assuming that is the fuel pump.
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Old 12-24-2017
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Re: Fuel Pump Relay location -- 2009 Civic

Just a quick update.....because the Honda Civic Gods are pissed at me....the car is now starting.....AAARRGGGHH...

I checked the ignition coil fuse....obviously that's ok...doh

Is there some sort of ignition coil relay?
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Re: Fuel Pump Relay location -- 2009 Civic

Those type issues are tough.

Any mods to car ?

You will have to attempt narrow fuel, spark etc. 1 by 1. Of course when it is shows up.
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Old 12-24-2017
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Re: Fuel Pump Relay location -- 2009 Civic

Originally Posted by CraigW View Post
Those type issues are tough.

Any mods to car ?

You will have to attempt narrow fuel, spark etc. 1 by 1. Of course when it is shows up.
No mods.

Thought I was Einstein when I replaced the fuel pump. Now I feel like Elmer Fudd hunting for a pesky rabbit. Pretty confident that it is not fuel related (I hope).

I don't know how you check if a relay is starting to go bad, but I'm now tracking down the ignition coil relay.
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Old 12-24-2017
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Re: Fuel Pump Relay location -- 2009 Civic

Originally Posted by redgar-atx View Post
I don't know how you check if a relay is starting to go bad,
I might backprobe a test light into whatever component in the switched circuit is handy.

but I'm now tracking down the ignition coil relay.
Relay #2, check the diagram in your fusebox lid and tell us what symbol it has
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Old 06-09-2019
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Re: Fuel Pump Relay location -- 2009 Civic

I have the same issue with Honda Civic 1.6 2007
Could you please tell me what was solution of your car?

Originally Posted by redgar-atx View Post
Well....I got the new relay. Figured out how to take off the lower skirt. Replaced the part...AND...still not working.

eZone -- thank you for your help. SERIOUSLY, just showing me the diagram was like talking me off a ledge.

Need to figure out my next move.

Replaced fuel pump. And then it worked for a day.
Replaced spark plugs. And then it worked for a day.
Replaced both fuel pump relays. And that did not do the trick.

Seems like there is a bad relay or short somewhere. All the other electrical systems seem to be functioning.

My driveway is on a slight uphill slant and the problem seems to manifest itself when the temperature drops. Right now I am just reaching for anything.

Thanks again eZone.
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