View Full Version : D40, slightly worrying issue
Caught up with a close mate today who I hadn't seen in a while and has recently bought a low km D40 nav with lift and tyres.
Decided to take it out offroad and hr mentioned on the way it does an annoying thing where sometimes ig you fail yo climb a hill, it takes a second or two before the brakes work. Mentioned it felt like the abs making its mind up before locking. Anyway, it did it a couple of times and then all of a sudden, no brakes.. Were sent bailing down a dune backwards, no brakes what so ever..
Only seems to happen after attempting a hill.. Car is going to fast to engage reverse and handbrake does fuck all. Put the shits in us pretty nicely... Thankfully mate can pedal or could of certainly been a fatal rollover given the speed it gained.
Anyone got any ideas
kurbn
04-09-2014, 08:36 PM
That's very fucked. Pedal to the floor? Hard pedal? Pulsating pedal?
-Luke-
04-09-2014, 08:39 PM
Brake fluid level....?
Yeah foot hard, even pumping didn't help. Thing that racked my brain was its NO brakes, not even like engine off unassisted brakes.. But absolutely nothing.
Levels are good, everything works going forward or backward under normal conditions
kurbn
04-09-2014, 08:55 PM
How olds the car? Its weird it does it on an incline thats for sure. Im thinking very high moisture content in the fluid.
How soon does the pedal go back to normal. As soon as it levels out? Or need to pump it a bit
-Luke-
04-09-2014, 08:59 PM
Know anybody the owns an over head shop crane or forklift? Lift the fucker up and see what's going on.
Normally its back to normal after a second of your foot being flat but the one time it decided not to we were at the bottom before they engaged. Has paperwork for last service less than 2k ago that claims full brake fluid flush bleed and replacement fluid.
Chivalry
04-09-2014, 09:32 PM
Unreliable Japanese junk. Did you tell him he should have bought a Lada?
Haha he's one of my mates who did own one.
For the record; "nothin like the niva but goes alright"
kurbn
05-09-2014, 05:03 AM
Not even japanese haha, vin starting with vsk is spain and mnt is thailand.
Brett_J
05-09-2014, 05:12 AM
Do these run Brake assist or Hill descent assist of some kind ?
RICEY
05-09-2014, 05:39 AM
Ive been in a couple of late model 4WDs that do this, same thing happened to me in the exs Vitara. We ended up having to pull the ABS fuse then it was sweet.
http://www.4x4abc.com/4WD101/ABS_offroad.html
Why ABS could be bad for you when off-road
ABS was designed to keep wheels from locking up. ABS was designed to make driving safer (in most circumstances).
Locked up wheels can no longer steer the vehicle. For example, you would not be able to steer around an obstacle with locked wheels - with wheels locked you would slide straight into it. So, even though you are able to turn your steering wheel - the vehicle can not follow this command when the weels are not rotating. ABS keeps wheels rotating.
Again, ABS makes driving safer.
Not so on a dirt road!
Sand and gravel under the tires act like tiny ball bearings when you step on the brakes. As a result there will be very little friction/traction between tires and ground.
Therefore all four wheels want to lock up immediately.
ABS would keep them from doing so.
So you keep rolling and rolling, and rolling, and rolling. You might be rolling for too long and your stopping distance is going to be that of a container ship. Too long to be safe. You might even drive off a cliff.
yeahlow34
05-09-2014, 08:07 AM
...
Aside from that being absolutely terrible english, I don't think that's the issue.
If it was ABS, you'd have pulsating brake pedal. Or at the very least, some pressure on the brakes - albeit minimal.
kurbn
05-09-2014, 09:13 AM
a real wild guess here..
Boosting hard up the hill to get up it, booster copping boost pressure somehow.
millzy_88
05-09-2014, 09:21 AM
Pull ABS fuse and test again?
RICEY
05-09-2014, 09:22 AM
Aside from that being absolutely terrible english, I don't think that's the issue.
If it was ABS, you'd have pulsating brake pedal. Or at the very least, some pressure on the brakes - albeit minimal.
I had no pulse, removed ABS fuse and it was fixed instantly.
S85FI
05-09-2014, 09:43 AM
Not even japanese haha, vin starting with vsk is spain and mnt is thailand.
Did some of these get made in Japan? I was told same with d22 and parts people keep telling me is it Thailand? Or Spain? And I say " my understanding is dss was Thailand, d40 Spain and some Japan, mine is Japan build.
They look at me and say... none in Japan...
I say. .. have a look... but im pretty sure the plate states japan...
kurbn
05-09-2014, 10:19 AM
D22's were Japan or Thai
D40s are Thai or Spain
Fairly sure all the new D40's are all Spanish now, been a couple of years since working for Nissan.
Vin number that starts with JN1 will be japan, and as said before VSK spain (S MEANING SPAIN) and MNT is THAI (T meaning Thai)
Spanish built interiors were way nicer, chrome inside handles and better dash/console trims, Thailand was all dark grey plastic and bland
DISTRBD
05-09-2014, 11:48 AM
I had no pulse, removed ABS fuse and it was fixed instantly.
Had a few fords do that , Pump issue and pedal goes hard and keep on sailing through the intersection ,
RICEY
05-09-2014, 11:55 AM
It only happened off road for some reason, very low traction must make the ebcm lose its shit.
Turboesky
05-09-2014, 01:09 PM
a real wild guess here..
Boosting hard up the hill to get up it, booster copping boost pressure somehow.
Not sure what motor it has, but if its a turbo diesel it wont be making booster vacuum from the inlet manifold.
Normally run a vacuum pump.
kurbn
05-09-2014, 01:15 PM
will be a 2.5 turbo diesel
yeahlow34
05-09-2014, 02:07 PM
Sounds like you're not running enough boost.
2bar will fix it.
tried that today, apparently it runs of vacume. blah blah throbbing vein turbo blah blah no boost controller gay times fucking shitissan
kurbn
05-09-2014, 03:43 PM
correct.. vac operated actuator.. think it works opposite way, so a boost controller would hold the flap open longer lowering boost.
Something else stupid about them, CAS runs off the flywheel. Guy I use to work with drove his through a bit of mud/water and copped some in the bellhousing. Caked the sensor full of mud and the marks on the mass area of the flywheel which
ultimately stopped the vehicle from running...
RICEY
05-09-2014, 04:28 PM
No vacuum shouldnt stop the brakes working completely, just gives a hard pedal.
S85FI
05-09-2014, 04:53 PM
Not sure what motor it has, but if its a turbo diesel it wont be making booster vacuum from the inlet manifold.
Normally run a vacuum pump.
Old school ones used to run off the back off an alternator. Do modern cars do the same?
DISTRBD
05-09-2014, 05:35 PM
Old school ones used to run off the back off an alternator. Do modern cars do the same?
Y61 , 80 series had them run of a pump from crank , not sure about newer models ..
Turboesky
05-09-2014, 05:46 PM
The newer stuff I have seen normaly has the vacuum pump mounted on the timing cover somewhere.
will be a 2.5 turbo diesel
Unless STX 3l v6 turbo.
Haven't had this problem with mine yet, interested to see what's caused it.
yep its the stx. drove it for myself today, u can feel the pedal pulsing but no brakes
Turboesky
05-09-2014, 06:10 PM
Yank the abs fuse and see what happens. If I owned a modern 4wd with abs I would hook up a relay that disengages abs when you select 4wd.
Yeah I will, its kinda the thing though were you shouldn't really have to.. If that makes sense. Took it to Nissan today, he stood there scratching his head then told us to book it in.
RICEY
05-09-2014, 09:59 PM
Without reproducing the fault they wont be able to diagnose it, unlikely they will drive it up sand dunes haha
RICEY
05-09-2014, 10:01 PM
http://www.4wdaction.com.au/forum/viewtopic.php?f=81&t=121494
Another D40 same issue
Haven't had issue in mine, then again I made it up most hills. Can pop round and help diagnose? See if mine suffers the same issue?
sounds like an excuse for a beer! :)
Unkn0wN
08-09-2014, 03:43 PM
D40 have a pretty spongy / shit brake setup to start with.
I put some braided lines in a mated D40 and it was made an awful lot better.
regardless tho, this is not overly related, just saying they have shit brakes in general.
The d40, as with the d22 YD25 have a vac pump driven by the timing chain to get your brake booster vacuum.
if you lost vac you would prob have a fun time pumping the shit out of the d40 pedal to get pressure....i know this because before we did my mates d40 lines it would roll down the driveway (while off) and you wouldn't be able to stop it on the first pump.
if you were pumping away and got nothing, it could only be ABS giving you the old computer interference. the computer has nfi whats going in off-road situations and will allways over compensate or spaz the fuck out.
there not really to much to it? if hes got normal braking in other circumstances his master/lines and brakes must be OK, these things don't become temperamental, they either work or they don't.
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