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Old 12-14-2021, 05:41 PM
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Aussie E53 4x4 and Brake??? warning light

Now before I get told to search, I have done this and I see people write about the trifecta lights and I see the dash displays but they are different to my display. I beleive there are about four different displays available and I have the EU type which shows the brake as a symbol and not word. Also they only ever show up in yellow at the moment, is that important? I never get RED!


So, what is different that I have to make a new thread? Well, I only get the two lights but when they appear the car stalls! other times it drops to idle and it will not accelerate. Sometimes, if I left foot brake and keep the RPM at 1500, it is fine and also more positively in manual mode. At 245,000km (152,000 miles) 3.0 diesel 6spd auto I figure I will change the transfer case gear anyway and I have a new one already on the way.


What baffles me is the stalling out, no one has ever mentioned it that I could find. As I mentioned before, it is an E53 with a build date of 11/06 and that surprised some. I certainly is not a top line model and I would think more base line. It does have the same size rims front and rear and I had this happen once on the old tyres but since Monday after fitting new tyres it has become more and more frequent to the point where I am not going to drive it till I replace the transfer case gear now. There is also a strange little shudder at the front until the lights come on and if it hasn't stalled out then it does seem smoother. Also, after being turned off for a bit then restarted, everything is back to normal until it happens again and this is way random, from one kilometer to 40 kilometers or not at all.


I hope you will forgive me for making another post on an aready well documented issue about the transfer case gear and I do seem to think this is probably my issue, but is it the cause of the engine stalling? That is the key to what I want to know and what is the trifecta of lights as I only have two?


Thank you in advance, I bow to the more knowledgeable of you all here
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Old 12-14-2021, 06:12 PM
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My guess, the stall and moving is causing the lights to come on. The movement and no electric power to sensors. The stalling issue needs to be solved. What codes are present? Front brake shudder is cause by worn parts. Mostly ball joints, thrust arms, and lower control arms. Lastly, the antisway bar links. Highly unlikely, but a brake sensor could be causing a short.

Wow, 11/06? Mine is 04/06. Yours has be one of that last ones built.
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Old 12-14-2021, 11:27 PM
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Stall means no voltage will cause any possible error.

The type of stall you describe sounds like cam position sensor.

Miles and had it ever been replaced?


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Old 12-14-2021, 11:50 PM
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Quote:
Originally Posted by X5chemist View Post
My guess, the stall and moving is causing the lights to come on. The movement and no electric power to sensors. The stalling issue needs to be solved. What codes are present? Front brake shudder is cause by worn parts. Mostly ball joints, thrust arms, and lower control arms. Lastly, the antisway bar links. Highly unlikely, but a brake sensor could be causing a short.

Wow, 11/06? Mine is 04/06. Yours has be one of that last ones built.

Ok, I had this once in four months when a tyre went really low pressure and I had the tyre pressure light as well. Since four new tyres, this is now a regular event, is that just a coincedental thing?

X5chemist, the lights come on way before the stall happens, as to codes, would they show up on the cluster readout? If so, then there are none. The shudder is not under braking, it is around 80-90 km/h (50-55 mph), then it smooths out. All the wheels are balanced, but I did not have a wheel alignment at the time.
The last independant mechanical report gave all the front and rear bushes, tie-rods and ball-joints a clean bill of health. It did say the disc rotors may be in need of a skim with the next set of pads but there was no evidence of warping on either end.

As I said before, if the lights come on and I have no issues as I am driving at road speed, there is no shudder at all through the speed range.



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Originally Posted by andrewwynn View Post
Stall means no voltage will cause any possible error.

The type of stall you describe sounds like cam position sensor.

Miles and had it ever been replaced?


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andrewwynn, would it be worth checking the lead connections and earthing points? As to cam position sensor, excusing my dumbness on diesel but is it still applicable? If so where are they, and I have no idea if they have ever been replaced.

I know when I am in the car and it is in park or nuetral, it will rev to 4000 rpm without any problem, I can even hold the rpm at any point in the rev range iand it will stay there without fluctuating. Put it in D and it may or may not respond at about 70/30% right now. That is in the positive!


Additional information, I did put the monster through a high pressure car wash and di an underbody clean could I have got water into something and FUBAR'ed it?

Last edited by Spartan; 12-15-2021 at 12:20 AM. Reason: Remembered more info
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Old 12-15-2021, 04:19 AM
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I guess it's possible that either the transfer case actuator connector or transmission connector now has water in it. Do you still have the full transmission cover in place (plastic under-shield)?
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Old 12-15-2021, 06:05 PM
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Yes as far as I can see, the only cover missing is the front one under the harmonic balancer. In all honesty I have not looked under the car that far though. I can see from the front there are covers in place, but as to what they cover I won't know until I get under the car later.
That's a good place to look at and make sure it is clean though, thanks!


All the suggestions are good so far and thank you to everyone who has contributed, it is very helpful.



Damn summertime here and some days are already forecast for 38c. At my age I would be under the car less and drinking beer more...then the enthusiasm for working disappears.
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Old 12-15-2021, 09:07 PM
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Quote:
Originally Posted by Spartan View Post
... In all honesty I have not looked under the car that far though. ...
Pretty hard to miss (easy to spot) the transmission cover - it's about the size of a small dining table!



The front of this cover hooks into the rear of the alloy stiffening plate under the engine, giving total coverage of the transmission and transfer case. Hard to see water getting past this (in normal use) but a serious under-body wash might sneak past...
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Old 12-15-2021, 11:42 PM
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Guter Gott im Himmel... that looks like my caravan table.


It was a pretty high pressure clean, we had driven along the coast a bit and I had always given my cars a good clean underneath afterwards to get rid of the sand and salt that collects underneath. Usually about three of these in 6 weeks, so this was the second one.
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Old 12-16-2021, 08:20 AM
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I'm betting you for water somewhere it's not happy about. I would open and rinse every connector I can get to. I usually use something like brake kleen or distilled water followed by wd-40
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Old 12-16-2021, 08:20 PM
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Depending on the type of connector and what the contacts look like, some have a white corrosive apperance, while others have that shorted black look, I use very fine files and wire brushes to clean the pins and sockets, then an electric contact spray to clean them and a die-electric grease on re-assembly. This usually gives a good weather proofing to both contacts and sealing.



Having said that, I conned my brother to call over and run his $8k car computer over it. Strangely it gave us six glowplug errors, but I never have start issues , oil change out of date, but I have reciepts from the workshop that did the service, (they wouldn't rip yoou off would they ) previous owner. Air suspension failure, but none fitted which it identified later??? and Jackpot...transfer case problem that I remember referred to the selector. Oh, one low voltage fault as well. The age of these faults is rather old, which again puts suspicion on the service shop and the validity of their work.
I have the gear coming, so I will just wait until it arrives before driving it anymore and focus on doing the above suggestions by you helpful people.


Thank you for the ideas and if you have any thoughts on the recent scan results, I would be more than a little interested.


Happy Festive season to you all, what ever one you choose, and for the rest of us...Merry Christmas and a Happy New year. Jeff
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