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NISSAN PATROL Y61 3.0 Di (ZD30) 09/2000
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from the top of my head, the ECU controls that switch, and if 'neutral" is seen on, prevents the Revs from going too high to protect the motor going high in Revs in neutral position. So I would expect some side effect.

What is strange though, is your heat button. Normally, it only works in neutral position on a manual with the Revs going up to 1200RPM. As soon as you engage a gear, the Revs go down and 'heat' does not rwork anymore.
That could mean that the switch is blocked in a non-neutral position. but in that case, it wouldn't prevent the REVs from going up.

Anyway, you need to fix this. Fuse for heat button is N°28.
Try to unplug the switch connector to see what happens ? and check the voltage coming in, and out.

to work, the heat button needs also to have the pedal-up switch showing the full release of the pedal. These little switches on the TPS sometimes fail too. And the motor has to be cold ( <105°C)
 

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07 Black Patrol 3.0 / 04 Grey 3.0 Patrol / 01 3.0 Patrol
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Discussion Starter #82
Thanks for the feedback! I recently changed the TPS, Checked every fuse and relay...changed ECU, keyreader and key magnet to link up imobilizor and nothing works to get the glow plugs glowing off the key or that heat button!

This Patrol has some serious wiring issues i think like i said at the start of this thread but nothing that can't be fixed.I sent my pump back because 90% of the time on a DI for any poor engine running issues from an otherwise healthy running engine is normally always the pump.
 

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07 Black Patrol 3.0 / 04 Grey 3.0 Patrol / 01 3.0 Patrol
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Discussion Starter #83
This is the way i think the 'heat button' works, It's just a simple switch that is programmed to heat the engine from cold if you choose to use it by raising the rpm's of the engine. Now if you have the heat button on and put the transmission in to gear the revs drop. So the point of this is simply just to turn off the heat button automaticly when you are driving because you really don't need it! Do i think it would cause a constant limp mode and not allow the patrol to go above 2000rpm's ...? No i don't think so BUT this is just my honest opinion and i do applaude you PHD for pointing and noticing this issue!

I think if this neutral switch was the issue it would be the same once cold. This Patrol revs fine until it starts to warm up.

I honestly think it's the injection pump timing not advancing once getting hotter because it simply can't cope But if it turns out not to be the pump then it looks like PHD is on the money ;)
 

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NISSAN PATROL Y61 3.0 Di (ZD30) 09/2000
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I would not disagree with your IP comment.
But do not forget that the ECU is managing most sensors and switches, and we did not write its software... SO what the ECU does in case of ill-function is ... sometimes unknown.
 

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07 Black Patrol 3.0 / 04 Grey 3.0 Patrol / 01 3.0 Patrol
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Discussion Starter #85
Good suggestion! Ok i am going to try to take off the Neutral position switch off my 2001 Patrol that i use for spares tomorrow...the problem is that it's sitting outside in our yard with no axles so it's going to be a challenge to get the switch off and even jack it up... my brother has a tractor and front loader but he is not around tomorrow so it's down to me to figure it out.... would this switch not ignite the check engine light though?> OR would Nissan not have spotted it not working?
 

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NISSAN PATROL Y61 3.0 Di (ZD30) 09/2000
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I don't really know, but possibly not. may be the ECU is only checking its tension ( 0 or 12V) to detect 'on' or 'off', and the software then does its things depending upon this value, without checking the inconsitency ( car with speed > 0km/h ). but how the ECU would know you are driving at 20km/h in neutral position by choice, or rev your motor in neutral at 4000RPM by choice too. And you would not like to see a light on the dash in these cases.

So the best would be for the ECU to limit the Revs. But I believe this is what it does for Revs above 3000 or 3500 to protect your motor when idle, not 2000.

Could it be possible that your IP has a seizing problem when hot, limiting the quantity of fuel being sent to the injectors ? Or could this be due to a temperature sensor sending too hot a temperature to the ECU, cutting fuel to protect your motor from over-heating ?

Strange thing is no code sent by the ECU, which it should if it enters eny security mode, even if the dash ligh is not ON.

LAST idea which came : something wrong with the brake switch, which is read by the ECU.
It is above the brake pedal. if 'ON' when driving the ECU modifies its injection orders to the IP. So may be an intermittent problem with temperature or ill-function of some switch can really have side-effects on the fueling.
 

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07 Black Patrol 3.0 / 04 Grey 3.0 Patrol / 01 3.0 Patrol
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Discussion Starter #87 (Edited)
I phoned the Diesel specialists today to put a hurry on them LOL ... Well i put it in a nice way and i was just enquiring how long it would take to get the bench test results.I am only dealing with the service manager anyway not the pump man himself although he does contact me when he needs to. So it's all good and i don't come across as too much of an ass on the phone putting them under pressure. It's a balancing act you get used to after years dealing with people in business. Costs nothing to be nice and a little paitent either!! Anyway i said that the Patrol is in the way here in a shed so i'm under a little pressure & no point letting them get too lax anyway about the pump as it's my busy season too with firewood sales here so i need the Patrol back asap and if i don't stay in contact who knows how long it will take to get the ball rolling with them looking at the pump.They did say they are up the walls busy and i'm in a que.

Anyway, i made a start today and have all the timing set back up inc locking scissor gear and cleaning down all the timing covers and rocker cover ready for some new sealant when i get pump back,it was very easy to set the timing today,sometimes the marks just line up quick and other times they can take a while..i guess today i got lucky.

I contemplated pulling injectors and swapping the lot out today but i better wait and hear back about the pump first.

I also used electric contact cleaner on all connectors under the bonnet today and insulated any wiring i thought needed it. Maybe i might apply some vaseline grease before plugging them back in to stop any future corrosion.

Another strange thing today i spotted was the coolant temp sensor on the timing cover was caked with crud...Mmm maybe this wasn't helping things, it took a good while to clean it with some light wire brush and light grit sandpaper.It came up like new in the end.This will help it anyway even if it wasn't playing up.I must do the other coolant temp sensor the smaller one tomorrow too just above Injector pump and give that a good cleaning also.It can only help!

I like having everything ready and as much done as possible before refitting as it can only speed everything up especially great to have that damn scissor gear locked!!

I am all set now for the pump to be re-fitted...now to just await any news on it!
Dan
 

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07 Black Patrol 3.0 / 04 Grey 3.0 Patrol / 01 3.0 Patrol
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Discussion Starter #88
Ok i have a few updates. Nothing yet on the pump but i was told yesterday i will have answers today as they are bench testing it today!! I can't wait to know if it's the pump or not.
So today rather than trying to get in under my own patrol i am using for spare parts (the 2001 model) as it's laying flat on the ground without axles so i need to wait till i get the time to jack it up off the ground and get it up on blocks etc so i decided to make my life easier and went to the breakers in tralee today and Boom they had the switch! 30euros later and i'm out the door with my PNP switch! I was lucky too because the gearbox had already been out of the Patrol back here so a good result. :) This is a process of elimination right now too and i am doing this because in case it's NOT the pump i will have any thing suspect changed or to hand to try!

I have decided to buy another brand new MAF also @ 180euros here so that's not bad,i would like to put it on and have my own as a spare.

So i plan to get that PNP switch on today and at least i have a start made to get that heat button back working.
I should have an update this evening on the Injection pump!

If not i have my torque wrench and all specs to hand and i'm going to pull and change the injectors tomorrow as i have a set ready to drop in! After all that god knows what we need to do to diagnose this!

Dan
 

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NISSAN PATROL Y61 3.0 Di (ZD30) 09/2000
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When I have time I usually order my genuine Nissan parts from Amayama Japan. They ship and you have to add taxes on arrival. MAF was USD 70 + post + VAT on arrival.

One of my friend had a problem yesterday with its A/T Patrol. brake switch down. if brake switch on when driving, ECU limits fuel injection apparently.
 

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07 Black Patrol 3.0 / 04 Grey 3.0 Patrol / 01 3.0 Patrol
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Discussion Starter #90 (Edited)
Interesting PHD indeed! I still can't understand the wiring on my Patrol...clearly i have a strange issue!
The few wiring issues i have right now are

-Glow plugs won't work off key anymore so i use a button inside cab (Maybe this manual glow is a good thing)
-No heat button (Stopped working)
-Stranger thing is they were all working when i got Patrol and just stopped!
- Checked all fuses and relays and nothing blown (Very strange) swapped ECU & made no differnce!

Can anyone say where the glow plug timer is? Is it built in to the ECU?
I have checked 100amp glow fuse (fine) relay outside near engine (fine) and relay above fuses in cab (All fine) this is very strange...
 

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2003 ZD30 Di Patrol (The rare Gold one)
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Interesting PHD indeed! I still can't understand the wiring on my Patrol...clearly i have a strange issue!
The few wiring issues i have right now are

-Glow plugs won't work off key anymore so i use a button inside cab (Maybe this manual glow is a good thing)
-No heat button (Stopped working)
-Stranger thing is they were all working when i got Patrol and just stopped!
- Checked all fuses and relays and nothing blown (Very strange) swapped ECU & made no differnce!

Can anyone say where the glow plug timer is? Is it built in to the ECU?
I have checked 100amp glow fuse (fine) relay outside near engine (fine) and relay above fuses in cab (All fine) this is very strange...
The glow plug timer is a map in the ECU that sets glow time depending on engine temp. It provides a earth signal to the glow plug relay to activate it.

Sent from my SM-G930F using Tapatalk
 

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07 Black Patrol 3.0 / 04 Grey 3.0 Patrol / 01 3.0 Patrol
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Discussion Starter #92
Cheers Skeg,

Strange then when i swapped over ECU's that it made no differnce and glow function is working perfect on my other patrol.
At the moment i plan to get them glowing again off the key but i have been reading your thread too with interest (Good job) i may also opt to do something like on your thread the Kermo timer.
At the moment i am using a push button but i found the Patrol runs very bad and starts missing in these cold sub zero mornings here,i have to hold button for at least 30 seconds plus and without my heat button working all that effort is really annoying!!
I plan today to replace the glow push button with a switch...i would continue to use this only i'm not sure if glowing on full power for anylonger than the start period is advisable cause i know that power is reduced to the glow plugs with the factory set up shortly after start up.
 

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NISSAN PATROL Y61 3.0 Di (ZD30) 09/2000
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Dan, maybe you should check all your grounding/earth connections.
A bad connection creates many troubles.
 

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07 Black Patrol 3.0 / 04 Grey 3.0 Patrol / 01 3.0 Patrol
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Discussion Starter #94 (Edited)
Ok i have some updates and i am going to write them in order of my recent work on this very challenging project!!

This has been an emotional rollercoaster ride for me LOL! From good luck to getting this thing running to now it deciding it don't want to run no more lol and no fault of mine because i am in touch with the owner of my other Patrol i just sold (As i mentioned i done the pump change in that too) and that thing is flying!!
So....What a pain in the butt this Patrol is currently been and yet i STILL can't diagnose it. Ok so i went and got the gearbox PNP switch and it was the wrong one so i couldn't rule that out.I presume for 07 models they are differnt to the early ones.

So i decided as i previously mentioned to take no chances anymore and not beat around the bush so i pulled the Injector pump again and sent it back to the diesel specialists to test and it came back with a clean bid of health, so it passed the test and the Injection pump is fine! So i refitted it and decided to play around with the Patrol some more and it started and ran the same way 'Obviously' not passing 2200Rpm's and still somehow in limp mode... So i decided only one thing left to do and that was to pull the injectors so i had new copper washers and O-rings to hand as i had been planning ahead and knew i would need to check these anyway...so after pulling them i was very hopeful with what i found...cylinder no 2 was very caked with carbon and it looked like it wasn't firing so again this was hope!!! So i decided to swap out all four with a fresh set of injectors pulled from my other parts Patrol and guess what!!! No change.....LOL.!! What a disapointment!! Now the possibility these could be bad too is real because i can't test them but i would say inlikely because Patrol 3.0 injectors are bulletproof and i have had a set that done almost 600000K's lol.. I had my torque wrench here and all the specs...nothing is been left to chance.

Then lastnight some sort of break through happened, for some reason i decided to check and see were any codes logged sinse because this Patrol started to run worse if that was possible.So i did bridge the terminals on the computer connector again and check the codes manually on the dash with the check engine light blinking the codes and low and behold it put up four codes :O Great!!

The codes were as follows:

- 0905
-0407
-0702
-0208

Now this is all a little strange and i will explain soon.So in no paticular order those codes are for / Turbocharger boost pressure sensor (On intercooler) i changed that and no joy! / Cooling fan overheating issue, this is just an A/C issue as i plugged out fan as it was always staying on. / Crankshaft position sensor, i changed that out and no joy!! And finally the last code was TDC pulse from injector pump! Boom.... the only one i can't change but CAS would cause the IP to do funny stuff too so i'm not sure what is going on cause like i say i changed the CAS and no good so long story short i contacted the Diesel specialists and was in no joyful mood and it's on the back of a recovery truck on route as we speak back to them!!

I explained everything to the specialists every thing i done and checked... i won't rule out a blocked CAT Convertor because the engine sounds louder...who knows it's a possibility.I was about to change that but the pump code through me off.I checked turbo impellar and it seems nice and looks good with no visable damage at all. This could cause a limp type issue if the turbo wasn't able to spin free enough, i have a spare turbo too but as i say the turbocharger looked fine.

I will update on what they say. Could it be something else electrical playing up upsetting the pump who knows...anything is possible at this stage. It could the a problem with the main wiring loom or a faulty wire coming from ECM.
Either way i have done all from my end inc checking all earths too. I am limited to testing these elecs but another thing i want to mention is before it left on the recovery truck it was not starting without starting fluid so this was raising the question was it getting enough diesel?!
At this point the Head is a possibility too and i won't rule that out but it holds all coolant and is showing no signs of foul play in that regard. They are going to start by doing a full compression test too.

I will update soon...i told them this is urgent and they need to look at it ASAP i have no time to be messing around now and need it for work.

Dan
 

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NISSAN PATROL Y61 3.0 Di (ZD30) 09/2000
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0702 0407
Dan,
These two are, to some extent, linked I think.

0702 is I believe a problem of inconsistency of the crankshaft position sensor (0407) as captured by the ECU and sent to the IP, and the sensor which is inside the pump itself (CRPS):

The crankshaft position sensor (TDC) monitors engine speed by
means of signals from the sensing plate (with three protrusions)
installed to the crankshaft pulley. The data signal output is
detected at ATDC 70° and sent to the ECM. The sensor signal
is used for fuel injection control and fuel injection timing control.


CAM RING POSITION SENSOR
The sensor detects the passing of the protrusion on the sensor
wheel in the injection pump by the semiconductor magnetic
resistance element sensor. The cam ring position sensor synchronizes
with the cam ring, and detects the actual advance
amount. The injection pump control unit measures the injection
pump revolution by the signal of the cam ring position sensor.


The result is for sure bad injection/ injection timing, and possibly ECU security mode.
You can check the quality of the TDC sensor at the input of the ECU, by connecting an oscilloscope on input 44 ( take the ground on chassis).

514369



0905 is overboost.
You get this ( and a limp mode ) , if the boost exceeds 18psi for a few seconds,
if the VNT has its vanes closed for too long,and/ or its limiting screw badly set ( if your ECU still controls your Solenoid) then the boost goes to the roof. Do you have a pressure gauge ?
 

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Discussion Starter #96
Yes what you said makes sense PHD but we need to remember this pump was bench tested and it came up as ok! At this stage it's out of my hands for now and been diagnosed by the diesel specialists.

So i have a small update from the Diesel specialists today. They are wondering if this model Injector pump i have taken from my 2004 Patrol compatible with my 2007 Patrol that they currently are trying to diagnose too. I know the answer and told them that is should be! Simple as...i had it running for two weeks or more with it before it went in to limp mode. I spose they still have to do all the tests and rule everything out.They told me sometimes the pump part numbers have to match up and it's not uncommon for them to not match with later model Patrols. If this is true and is the case then i wonder what is the fix? Last words i spoke with him today on the phone he said he is not saying this is facts yet he is looking in to it to see if it's a possibility.

At this stage we don't know and it's a waiting game.It does seem like the EDC on top of the injector pump but again it was tested ok so....

I will report back with any news!
 

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GUII ZD30DI Wgn
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Yes what you said makes sense PHD but we need to remember this pump was bench tested and it came up as ok! At this stage it's out of my hands for now and been diagnosed by the diesel specialists.

So i have a small update from the Diesel specialists today. They are wondering if this model Injector pump i have taken from my 2004 Patrol compatible with my 2007 Patrol that they currently are trying to diagnose too. I know the answer and told them that is should be! Simple as...i had it running for two weeks or more with it before it went in to limp mode. I spose they still have to do all the tests and rule everything out.They told me sometimes the pump part numbers have to match up and it's not uncommon for them to not match with later model Patrols. If this is true and is the case then i wonder what is the fix? Last words i spoke with him today on the phone he said he is not saying this is facts yet he is looking in to it to see if it's a possibility.

At this stage we don't know and it's a waiting game.It does seem like the EDC on top of the injector pump but again it was tested ok so....

I will report back with any news!
I went through this before I changed my IP earlier this year, Zexel v Bosch, had been told by some 'experts' there were differences so was very wary, we know Zexel were made under license from Bosch that is a given. In research I got onto a place called Diesel Central up north (700k actually) I was up that way on a fishing trip and called in, had a very long chat with Shawn who owns a ZD30 BTW and remained in contact, that is where I finished up buying the IP and +50 injectors I changed out.

The story is they are interchangeable, you can buy parts one day and they come in Zexel packaging with a Zexel part number then buy another lot and they come in Bosch packaging and a Bosch part number, exactly the same bits.
 

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Discussion Starter #98 (Edited)
Yes GU2 just as i was thinking myself, after swapping it in it fired right up... this sudden limp mode is either something in the 'loom' simply a bad short or it's something in the head itself but i have been talking to a few lads who are very good with engines (Inc a local engine builder) and he told me that if it was a valve issue it would have been running very rough at idle etc and making a fairly evident noise... so i am sort of ruling out any engine problems right now and the coolant levels stay full all the time.

I doubt it's a pump issue too though because these lads are very trust worthy here, they are the best in the country at these pumps and they really have proven that to me now by standing over the warranty not once but a few times already! Remember they gave me a new engine too for my last patrol which not many would!!

Lets wait and see....this Patrol has been hard to start with the two pumps i have used in it so far but in saying all that it could be still a bad injector. This is another reason why i ended up going back to the diesel specialists because i can't test any of my injectors plus with my pump still under warranty it was the logical thing to do at this stage.
 

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Discussion Starter #99 (Edited)
Ok a little update today form the Diesel specialists. Not sure if anyone remembers i mentioned at the start of this thread that the timing chain main top guide had it's thread damaged well apparently the thread let go some and the timing had jumped two teeth!! :O This is all a little strange and i'm sort of in doubt about it myself. I was the last man at that and was fairly happy with the grip that thread got. To be honest i'm surprised it let go. Now it didn't let go as to loose the bolt or anything but it apparently got really sloppy when they stripped it all down they said it was very likely for it to jump the timing as a result.
At this stage i'm not sure if this is the cause and if they are 'thinking' it's the problem... i will wait and see tomorrow.If it's true it skipped the timing they should have it running in the morning for me.
When i last put it back together it looked to get good enough bite and the thread had enough bite to secure my peace of mind.

In any case i would think that with the tensioner fitted there is no way it could have jumped two teeth in the timing.... it was driving for two weeks fine and all of a sudden no revs above 2200rpm's ...funny when it happened it seemed mechanical and the 'timing' came to my mind on the road i was wondering could it somehow have went out of timing.
The other Grey Patrol i just sold never had any hard starting issues nor any issues at all after doing two pump swaps in it myself and currently is flying!!
I still can't see how it could... when i last fitted it the pump and timing was 100percent all marks fine and scissor gear all fine,that chain has no give what so ever on these ZD30 engines with the guides and tensioner on...i said this on the phone to the guy but he said it was out two teeth and most deffo must have jumped...

Does anyone want to chime in and agree/disagree about the timing been able to skip after two weeks with apparently dodgey thread on the guide.
When they stripped it down the guide and bolt was still intact but loose.
You know now that i think about it with any sort of slop coming in the main guide it could be very possible for it to jump a tooth or two...it's the sprocket that would slip in the chain once any slop is evident i would think.... what do you all think?
Still not sure how the guide came loose ohh well i guess the thread just wasn't up to the job.They are going to use a timesert now on it.

I still have a lot of confused questions that need answering,if this is the case and the timing did skip then why was it driving fine once cold and then once up to temps it would not go past 2200.... Mmm,more food for thought!!

So if this runs tomorrow and i can collect it then it has been a great result but i am sceptical and think that they didn't find the problem ;)
 

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Discussion Starter #100 (Edited)
Another small update, the Patrol is starting and running off the button. They are putting it all back together now this morning but i have no update yet on weather it is revving or not. Apparently it did slip out two teeth on the timing :O When i phoned they hadn't it assembled so couldn't really rev it he said yet...i will know later and update :)

So it looks like we are close to some definate closure here that if the timing guide threads gets even slightly damaged or loose in any way out of factory specs it can cause the sprocket to skip on the chain....common sense i know but i did mention that i thought that thread didn't look the best from day one! Ohh well...the joys have having no thread repair to hand and been in a little bit of a hurry.I must invest in a good timesert or helicoil kit actually ...allthough i'll probably never again need to use them LOL
 
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