GU Sub tank transfer switch nackered ??

Submitted: Sunday, Jul 11, 2010 at 22:42
ThreadID: 80006 Views:2098 Replies:7 FollowUps:3
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One for the sparkies . . . . or anyone who has the answer

it's on a 01/2002 GU TD, the fuel transfer botton on the dash does nothing now.

It was all OK until recently until, at first, the indicator switch "ON" light stopped indicating green. Then recently on a trip the whole transfer function ceased working. There is power to the switch & I've checked the pump also with test leads direct power, it pumps ok. But I want the switch to work - "arrrrrrh"

So the problem is either the switch or along the way. Looking at the schematics I see all wires go through a "control box".

Can anyone tell me where the control box is located ??

And has anyone had this issue & fixed it ??
Ta




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Reply By: MEMBER Bushbum - Monday, Jul 12, 2010 at 08:14

Monday, Jul 12, 2010 at 08:14
You can try disconnecting the battery for a couple of minutes, reconnect and then try it. I had a similar problem and this is how I fixed it. Must have been a glitch in the control module.
AnswerID: 423737

Follow Up By: Member - David Will (VIC) - Monday, Jul 12, 2010 at 09:36

Monday, Jul 12, 2010 at 09:36
I also agree with this, mate of mine had same problem and he was pulling his Patrol apart trying everything, told him to disconnect battery for about 5 minutes and it reset the computer and then all well.

Then he said that I should have came earlier in the day and it would have saved him pulling his Patrol apart.

I hope this works,

David Will
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Reply By: Dave(NSW) - Monday, Jul 12, 2010 at 09:36

Monday, Jul 12, 2010 at 09:36
Do what Bushbum said, It will reset the computer for the pump.
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AnswerID: 423747

Reply By: Member - nrb1748 (VIC) - Monday, Jul 12, 2010 at 09:42

Monday, Jul 12, 2010 at 09:42
The Patrol can sometimes suffer from a bad earth connection between the battery and the body.

Try this to eliminate a possible bad earth. Connect a jumper lead between the NEGATIVE terminal of the battery and a clean bare metal point on the body. Then connect another lead between the NEGATIVE terminal of the battery and a clean bare metal point on the chassis rails.

If this fixes the problem then permanently fit additional leads.
AnswerID: 423750

Follow Up By: Member - Vince M (NSW) - Monday, Jul 12, 2010 at 19:05

Monday, Jul 12, 2010 at 19:05
I would do both disconnect the battery for a few mins to reset the switch (no computer) & also fit some extra earth leads as the earth lead may not be a problem now but it will be sooner or later. but it could still be the switch I have had to change one but I hear that this is rare & mine is the only one I know of & I always keep fuel in the 2nd tank so the pump will not run dry as it runs for a few seconds every time you start the car. I know a few pumps that have died due to being run dry. Every time I blow the brake light fuses I have to re-set the fuel switch
good luck
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FollowupID: 694270

Reply By: OREJAP - Tuesday, Jul 13, 2010 at 10:06

Tuesday, Jul 13, 2010 at 10:06
Took mine to a Nissan dealer & he fixed it. Told me it was something to do with a sensor which either picked up water or air ingress and shut the pump down. I do not like the Nissan system where it pumps the fuel into the main. Should be like the Toyota system where you can drive the vehicle from either the main or the subby. I had this happen to me in a remote area and access to the sub tank which was full was nil, apart from pulling the whole thing apart. Anyway I sold the Patrol before it exploded.
AnswerID: 423877

Reply By: The Boy - Wednesday, Jul 14, 2010 at 11:48

Wednesday, Jul 14, 2010 at 11:48
Any blown fuses will also stop the pump, ie indicator fuse in my case :(
AnswerID: 424009

Reply By: Member - Salt grinder - Wednesday, Jul 14, 2010 at 22:37

Wednesday, Jul 14, 2010 at 22:37
Ok, OK everyone, the pressures off. She's fixed.

Looks like one of those computer gremlins. I disconnected the earth from the battery for 1 hour (to be sure) . . . . . and there you have it. So simple in the end after all my testing and ranting. I'm a happy chappy again.

Thanks for all the inputs you'r all a good mob out there.
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AnswerID: 424072

Reply By: geocacher (djcache) - Tuesday, Jul 20, 2010 at 00:01

Tuesday, Jul 20, 2010 at 00:01
Anyone know of a mod to convert the GU to run from either tank (ala Landcruiser) rather than transfer from one to the other?

Dave
AnswerID: 424568

Follow Up By: Member - Graham H (QLD) - Tuesday, Jul 20, 2010 at 07:18

Tuesday, Jul 20, 2010 at 07:18
You might not like the price of the bits to do it if a Toyota is anything to go by .

My bosses Sahara stopped pumping out of the subtank and the bit that died was over $1500
Luckily they relaced it under warranty.


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