Fuel Pomp power failure

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Glendir

Member
Posts
20
Hi guys, I have been facing with a new problem lately with my 99 gasoline Freelander 1.

Sometimes when I travel long distances like 30 km; and stop the car, then I start it again for some reasons, it will start normally but after 2 secs turn off the fuel pump then die. After that, it wont start again. This have never happened when I start the car when it has been off for 2-3 hours.

When it first happened, I checked the fuel pump power, which was off even if I start ignition. Then I removed the battery then plugged it back again, car worked very normal.

In time, when this keeps happening, I tried to remove and re-plug all the fuses to find the misbehaving part. I had ruled it out to the 5th fuse ( the one at the left column (see attachment) with the manual symbol next to it ) on the engine compartment fuse box.

When I re-plug it, it is working perfect. If I don't, nothing else seems to be able to restore the fuel pump power (except re-plugging battery of course).

I couldn't find the property of this 5th fuse but I guess it has to do with ECU.

Can somebody please help me or guide me to find what the problem might be?

Note: I had new ignition parts one week before this problem first happened BTW if that is important.
 

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Fuel pump is driven by a relay

Are you saying that there are not volts getting to the pump when ignition is on?

If so a new relay wont be expensive and might be the problem.

Relays can be tested out of the car, too.


Fuel%20pump%20relay.png
 
thank you so much for your answer lenny1234,

When I start ignition, everything is normal for 2 secs, then the power of the fuel pump is gone, forever (happens only when I start the car not long after I stopped it).

Whatever I did (even letting it rest for a day to see if that helps after the pump stops working) I couldnt read any voltages on fuel pump unless I replug that 5th fuse. Replugging Relay Module's fuse didnt help btw.

My LR1's engine compartment fuse box is not the same with you posted and the relay that controls the fuel pump is in the relay module which is placed under the fuse box. In the module there are permanent relay circuits as I peeked while a mechanic was checking it.

I attached images of them both.

I really need to find out what is that 5th 20A fuse is for :confused:. And I dont have the manual book and couldnt find it online :(

Please help me guys
 

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OK the data I posted is for the post facelift model so yours must be earlier.

which I see it is.

Do you not have an owners manual?

owners manual here

http://www.legionlandrover.com/manuales/owners handbook - freelander (2001).pdf

And the page you need is this one:

Fusebox-2.png


I have to say that IME its the fuel pump that is the problem, and I want to be sure that you are definitely seeing the voltage on the pump fall to zero when the car cuts out.

Have you tried a new relay?

It could be a wiring fault as well I suppose.
 
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OK the data I posted is for the post facelift model so yours must be earlier.

which I see it is.

Do you not have an owners manual?

owners manual here

http://www.legionlandrover.com/manuales/owners handbook - freelander (2001).pdf

And the page you need is this one:

Fusebox-2.png


I have to say that IME its the fuel pump that is the problem, and I want to be sure that you are definitely seeing the voltage on the pump fall to zero when the car cuts out.

Have you tried a new relay?

It could be a wiring fault as well I suppose.
Hello again and thanks a lot for your help. I have been figuring out the problem.

I have checked the engine compartment fuses wires and then engine compartment relay modules for anything strange

and then I figured out that Main Relay power does not cut off when I stop the engine, instead relay stays closed (active) for another 5 mins when even with the key is removed and doors locked. In this 5 mins if I try to start car, main relay will get open (deactivated) and thus fuel pump will stop. If I wait 5 mins relay would get open(deactivated) and it will start completely normal.

Then I checked the voltages of the wires to figure out which one does not get cut off. The white-pink cable (below) should be 12V+ for relay to be disabled but it remains 0V for 5 mins and then goes to 12V+.

I might remember the relay positions wrong, if you think I do I will check it one more time


What should be the reasons for the ECU to make such thing?
engine management.JPG
 
Be careful because you are using the wrong circuit diagram/rave manual. The one you are using is for MY01 cars - you need the manual for before MY01 - I don't know if there are differences in that particular diagram between the models.
 
Thanks for the warning you are right,

I have checked the color of the wire and it was really white-pink and it says K1.8 on the manual so I assumed it would be valid :)

But now I remember that I came across somewhere that they changed ECU software to OBDII at year 2000. So it might be changed.
 
The wiring is different between pre and post 2000 Freelander's. From memory the fuel pump is powered by the CCU directly on the early model. The later version powered the pump by a relay. In both versions the pump should run for a couple of seconds at ignition on, after this it stops until the engine is started.
 
Looks like my link for the ISO didn't work. Hopefully I've fixed it. You should save the file to your PC then open it with an ISO reader - the reader will make it appear as a disk drive on your PC or will burn a CD from it. I use Virtual CloneDrive. On the drive/disk there is a folder with a 'rave.exe' program you run which is a menu to the various PDFs.
 
I've been having trouble trying to find rave manuals of late. A lot of the sites hosting them no longer exist or have taken them down. If you want the Freelander Rave for up to MY01, I've put it on my website...

http://www.mydocz.com/Landie/Rave97.iso

I'll see how much ****e I get from hosting that. I may take it down myself if its clogging my bandwidth!

Thank you soo much I downloaded it yesterday, I hope it wont cause problem for your bandwidth.
freelander-kseries-starting.JPG
The problematic one is still white-pink one, it is coming from ECU to main relay, other end of the relay is coming from positive out of battery getting through engine compartment fusebox Fuse#3. The problem is this white-pink one wont get back at 12V when the engine is stopped (thus, relay stays closed while car stopped) I still cant find out why ECU does this.
 
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