Nissan 2006 GUIV 3L Diesel Sub-Tank

Submitted: Friday, May 15, 2009 at 21:41
ThreadID: 68874 Views:1877 Replies:7 FollowUps:11
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I have just bought this car and only used it for one trip to Fraser Island. It was running on the main tank with the Sub-Tank empty for the first couple of weeks i had it. Filled both tanks at Rainbow Beach when we were there. The main tank ran out tonight and the Sub is still showing on Full. Problem is there is no fuel going from the Sub to the engine so it was just the same as having one (empty) fuel tank. Anyone got any ideas on what the problem might be? I know the Sub is definitely still full because i checked to see if any fuel would fit when i filled the main. My guess is that the Sub may never have been used by the previous owner. Help please. cheers dave
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Reply By: Member - Ingo57 (NSW) - Friday, May 15, 2009 at 21:53

Friday, May 15, 2009 at 21:53
press the sub tank button on the dash It will pump into the main
AnswerID: 365122

Reply By: blueriderwa - Friday, May 15, 2009 at 22:02

Friday, May 15, 2009 at 22:02
So when you say push it do you mean push it and hold it or just push it once? The thing that is confusing me is that the Sub-Tank light on the dash near the guage is on all the time. I have tried pushing the sub tank button but i am still not confident i am doing the right thing. The sub tank light stays on and wont go off no matter how many times i push the button. Should this happen?
AnswerID: 365127

Follow Up By: timglobal - Saturday, May 16, 2009 at 06:28

Saturday, May 16, 2009 at 06:28
I always wondered why the crazy car manufacturers provided warning lights and user manuals.
So we can ignore them, of course!
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FollowupID: 632783

Follow Up By: blueriderwa - Saturday, May 16, 2009 at 08:18

Saturday, May 16, 2009 at 08:18
I dont have a user manual it wasnt in the car when i bought it. assumption is a weakness you know!
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FollowupID: 632794

Follow Up By: timglobal - Saturday, May 16, 2009 at 11:29

Saturday, May 16, 2009 at 11:29
Hah!
A warning light and the part also not working is a bit beyond assumption.
Please don't make assumptions when red lights come on!
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FollowupID: 632854

Follow Up By: blueriderwa - Saturday, May 16, 2009 at 13:31

Saturday, May 16, 2009 at 13:31
The light is not a warning light it is an indicator light....but you obviously know that because you have read the owner's manual from cover to cover.....oh he who clearly knows all......sorry next time i have a question to ask i will address you directly so that i can get a taste of your sarcasm and lack of helpfulness first hand.
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FollowupID: 632870

Reply By: blueriderwa - Friday, May 15, 2009 at 22:04

Friday, May 15, 2009 at 22:04
So when you say push it do you mean push it and hold it or just push it once? The thing that is confusing me is that the Sub-Tank light on the dash near the guage is on all the time. I have tried pushing the sub tank button but i am still not confident i am doing the right thing. The sub tank light stays on and wont go off no matter how many times i push the button. Should this happen?
AnswerID: 365128

Follow Up By: mick - Friday, May 15, 2009 at 22:14

Friday, May 15, 2009 at 22:14
Gidday blueriderwa,

I had a similar problem with my 2003. I took it to the dealer and was a little concerned that this was happening due to the fact that we relied on the sub tank when we did long trips.

All he did was reset the sub tank module. If it's the same, you will find a white plastic box (about the size of a cigarette packet) underneath the radio under the console. You can reach in and find it by hand. It will have "diesel" written on it. Unplug it by pulling the bottom section of the box off. Replace it after 30 secs or so. This should reset the module, and turn the light off.

Let me know how it goes.

Mick
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FollowupID: 632765

Follow Up By: blueriderwa - Saturday, May 16, 2009 at 08:21

Saturday, May 16, 2009 at 08:21
Thanks Mick, its still under warranty so i think ill just take it to the dealer to fix. Thanks for your constructive reply.
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FollowupID: 632795

Reply By: Robin Miller - Friday, May 15, 2009 at 22:15

Friday, May 15, 2009 at 22:15
Their have been some issues with earthing etc on this tank which a search of this site will reveal - however just for now , disconnect your battery and re=connect it to-morrow morning , several have reported that this can clear some errors that get logged by the ECU which prevent it sending fuel to the main tank.
Robin Miller

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AnswerID: 365132

Reply By: Andrew (Bris) - Saturday, May 16, 2009 at 00:06

Saturday, May 16, 2009 at 00:06
Recently had the same problem.
Subtank light on the dash stays on all the time.
Was a simple fix.
Bad earth on the battery.
Fixed a new earth strap from the battery to the Patrols body.
Disconnected the battery for a few minutes.
Connected it back up and all was good.
Good luck with it.
AnswerID: 365147

Reply By: Patrol22 - Saturday, May 16, 2009 at 07:58

Saturday, May 16, 2009 at 07:58
If, after pushing the sub tank button, you have a look into the filler neck of the fuel tanks you should be able to see the fuel pumping from the sub to the main (this was the case with my 1998 GU).
A word of caution, DO NOT leave the sub tank empty you will burn the transfer pump out. The GU has a function that when the main get to about three quarters full it transfers fuel from the sub to the main for about 5-10 seconds. This has a two fold effect of keeping the pump lubed and stopping people from leaving stale fuel in the sub tank.
AnswerID: 365165

Follow Up By: blueriderwa - Saturday, May 16, 2009 at 08:22

Saturday, May 16, 2009 at 08:22
if it all hapens automatically, why is there a button to turn on the sub tank? sounds japanese to me. thanks for your help though it is appreciated.
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FollowupID: 632796

Follow Up By: Patrol22 - Saturday, May 16, 2009 at 08:27

Saturday, May 16, 2009 at 08:27
Because the automatic transfer is for 5-10 seconds only at start up...to fully transfer the sub tank to the main you must press the button. The engine is fed only from the main tank.
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FollowupID: 632798

Follow Up By: blueriderwa - Saturday, May 16, 2009 at 12:59

Saturday, May 16, 2009 at 12:59
Great info and makes complete sence cheers
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FollowupID: 632866

Reply By: blueriderwa - Saturday, May 16, 2009 at 13:32

Saturday, May 16, 2009 at 13:32
Thanks for all your helo guys. I just thought i would try disconnecting the battery and reconecting it and it seems to have re-set the sub-tank. Very greatful cheers.
AnswerID: 365223

Follow Up By: Michael ( Moss Vale NSW) - Saturday, May 16, 2009 at 18:24

Saturday, May 16, 2009 at 18:24
If that fixes the problem thats great, i had the same problem and it took Nissan 3 goes to finally realise it was the pump.. $600 to diagnose the problem and $600 for the pump and fitting.. Mine reset ok untill you try to transfer the fuel and the same error comes up.. Fingers crossed.. Michael


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FollowupID: 632913

Follow Up By: blueriderwa - Saturday, May 16, 2009 at 19:54

Saturday, May 16, 2009 at 19:54
Yeah I know what you mean, i hope i dont have the same problem fingers crossed it isnt the pump.
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FollowupID: 632935

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