Reply With QuoteOff the top of my head I'd say either the brakes and/or the centre diff and/or the transmission were overheating and the car was simply calling time out. It is preferable to use low range in sand; far less stress on the transmission.
Fossicker
SupporterHi guys,
After some advice - took the D4 (MY2015 TDV6, 110k) on it's maiden trip to Fraser Island last week with family (including chief Toyota fan-boy, my father-in-law) and after initially tearing up tracks with ease on 19" Cooper Zeon's at 19 PSI, 5km out from the western beaches, I get multiple amber warning lights appear on dash.
At the time, we were in off-road height mode, sand mode, high-range with DSC switched off, and without warning, dash shows three errors; 1.) Caution: Brake Assist disabled, 2.) Car reduced to standard suspension height for safety and 3.) DSC disabled, drive with caution (note: the dash light for when DSC is active remained on, indicating error). At this point, it fell out of sand mode too - and gave me no ability to select off-road programs, or change suspension height - features were unavailable. Continued driving for ~5km to beaches in effectively motorway settings before getting to camp site.
At this point - I'm thinking worse case scenario, electrical failure, and potential tow recovery off the Island, alongside serious toyota fan-club abuse. Fortunately, turned off/turned on engine, reboot computers and no issue - all modes delectable and no issue for rest of trip.
I think the biggest thing that concerned me was uncertainty as to whether DSC was on - and implications when on sand. Car probably had enough clearance on those tracks even at standard height, but definitely knocked my confidence.
Have any of you come across this, or could perhaps suggest what may cause it? At the time, I wondered if I'd dinged the compressor and this enabled some kind of safety feature process lowering the car etc...probably also highlights the need for IID tool...
Chris
Wizard
SubscriberOff the top of my head I'd say either the brakes and/or the centre diff and/or the transmission were overheating and the car was simply calling time out. It is preferable to use low range in sand; far less stress on the transmission.
2013 D4 expedition equipped
1966 Army workshop trailer
(previously SII 2.25 swb, SIII 2.25 swb & lwb, P38 Vogue, 1993 LSE 3.9V8 then HS2.8)
Swaggie
Gap tool is what you need for sure,particularly if you are going to use the vehicle for touring,and are going to keep it for a while.
Probably something to do with a wheel sensor,suspension sensor,or something similar.
May not happen again.
Master
Just reading between the lines, what speed were you doing ? wondering if the car lowered because you were exceeding the off road height speed limit. Its never happened to me so unsure if the car does everything you described.
Glad to hear it reset itself with the Toyota faithful present.
Bulletman
Swaggie
No,it just Bongs,message on dash to let you know it is going to lower.Then it lowers,if you don't reduce speed.Originally Posted by Bulletman
No dash lights come up.
Wizard
SupporterPlus 1 for using low range. I never drive in sand in high range to reduce load on the transmission and to properly enable all of the off road smarts, which activate when the car is in low range.
Bob
2010 D4 3.0TDV6 SE, ediff, LLAMS, 5 x GOE wheels, LT285/60R18 BFG K02's, GOE Compressor Guard, LR Tank, Mitch Hitch, ECB Bull Bar, Kaymar Rear Bar, Traxide, Safari Snorkel.
2019 Discovery 5 SD6 SE, 20 inch wheels, 275/55R20 Nitto Grappler G2 tyres
Wizard
My first response would always be to turn the engine off for a few minutes and start again. Can clear a lot of problems and as said they may never show again. Gremlins
Martin
Wizard
I support the view that the auto or the tcase has overheated..essy to do on sand. It's gone into life saving mode unlike Toyotas that would probably simply self-destruct☺
Master
I'm going to state it as well, low-range in the sand. Not just for D3/4's. Any 4wd. I know it is taught in some off-road classes and videos to use high-range in a low gear, simply put, they are just plain wrong! It doesn't take mechanical sympathy into consideration at all!
When are you ever going to go over ~40km/h (I can't remember now what speed the bloody D4 gets up to in low/6th... Only my poor little D1. Haha) in the soft sand? If you are, you are going to break many, many things over time...
I get it, on Fraser the main beach "highway" is like a road. That's fine. Get onto the hard stuff, stop/slow for a moment, pop it into high and go. Getting off the hard? Stop, low, go. It takes seconds to do and will ultimately save you thousands $ over the years.
On top of all that, once you're in low, you have sooooo much torque on tap now! It's a beautiful thing.
Sorry for the rant, but I have seen high-range mentioned in sand driving difficulty threads so many times this year it's getting to me.
I would also lean towards overheating being your issue. Question though... Had you recently crossed through one of the creeks? Maybe the alternator got a little drowning or you have some wiring (height sensors, ABS, compressor wiring, etc.) that might be wearing and the water closed a circuit it didn't expect to be closed. It's a hard one to diagnose without knowing the exact scenario and the codes that had been thrown. Scan tools are your best friend on any modern 4wd these days.
-------------------------
Chris Phillips
Offroader: 1996 Discovery 300TDI (The Green Donkey)
Missus: 2010 Discovery 4 TDV6 (Fancy thing)
Just 'cause: 1999 Discovery SE 3.9L V8 (Makes fun noises, sometimes...)
Spares: 1998 Discovery 300TDI (Only vehicle actually in the garage..........)
Run around: 2001 Nissan Pulsar ST 1.8L (Soul crusher)
Swaggie
Or a PAj,that cuts out and won't go anywhere until it cools down,not fun down near the water when the tide is coming up.
Overheating the auto on a D4 brings up other fault codes and warnings on the dash read out,and reduces the use of some gears.
Turning the engine on and off resets it once its cooled down.
The best way to let it cool is put the vehicle in neutral and let it idle,don't turn it off.
It normally doesn't cause suspension faults.
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