Hi Folks,
I have a 2011 D4 2.7 auto with 134,000km. I was offroad a couple of weekends ago and about 100m up a *very* steep/rutted hill, my D4 stalled. I was in 1st gear at about 1800 RPM, low range, DSC off, rock crawl. The weird thing was that as well as the gearbox fault message popping up on the dash, the power to dash went completely off as it stalled. Pressing the start button - it started fine - but the time and date had gone back to factory default - like what happens when you disconnect the battery.
On the road, it performs normally - for instance I towed my camper trailer 2.5 hours home without any hint of a problem.
I hooked up my Nanocom about a week ago and looked at faults - there were 30 faults from 22 ECUs! Here's the list:
U0100 - lost comms with ECM/PCM (intermittent)
U0102 - lost comms with TCM (intermttent)
U0128 - lost comms with parking brake control module (intermittent)
U0141 - lost comms with body control module (intermittent)
U0159 - lost comms with parking assist control (intermittent)
U3003 - battery voltage (intermittent)
P0562 - system voltage low (historic)
U0100 - lost comms with ECM/PCM (historic)
P081C - park input circuit (historic)
U0155 - lost comms with instrument cluster control module (historic)
U0126 - lost comms with steering angle sensor (historic)
U0102 - lost comms with TCM (historic)
P0607 - control module performance (intermittent)
U0100 - lost comms with PCM/ECM (intermittent)
U0415 - invalid data received from ABS control module (intermittent)
U0402 - invalid data received from transmission control module (intermittent)
P0607 - control module performance (intermittent)
U0100 - lost comms with PCM/ECM (intermittent)
U0415 - invalid data received from ABS control module (intermittent)
B100D - column lock authorisation (historic)
U0100 - lost comms with PCM/ECM (historic)
B10A2 - crash input (historic)
P0702 - transmission control system electrical (intermittent)
C1B14 - sensor supply 1 (historic)
B1081 - left temp damper motor (intermittent)
B1082 - right temp damper motor (intermittent)
B1085 - defrost damper motor (intermittent)
B1086 - air distribution damper motor (intermittent)
B1B7B - air blend actuator - rear left (intermittent)
B1B7D - aire distribution actuator - rear (intermittent)
After clearing the above faults, I started the D4 and then checked for faults again. "U0128 - lost comms with parking brake controller" came up. I then took off the battery terminals, adjusted the clamp pressure - they looked ok. I cleared that fault and let my wife drive it all week - the U0128 code was there when I checked yesterday.
Battery is an Exide AGM (original replaced under warranty) with about 50,000km on it. Alternator was replaced about a year ago.
I'm wondering if there is a canbus fault in the EPB or rear diff connector area? (Am I right to assume you have to take the wheel off and then take the wheel well liner out to see it?)
Any other suggestions? I'm very "time poor" at the moment and my mechanic can't look at it for over a week - and I'm supposed to be going on another 4WD trip this coming weekend!
Thanks in advance for any hints!
Regards,
Rob
30th May 2016 4:07 am
dgardel
Member Since: 03 Nov 2009
Location: Greater Venice
Posts: 2025
Check the battery connections (loose connections on the battery poles), seems that you had a black out....
for the "U0128 - lost comms with parking brake controller" I have also on mine time to time but the EPB work faultless, so do not worry about it.Discovery 5 tdv6 HSE Corris Gray Outback Engineering Limited Edition IID Pro MV License
Last edited by dgardel on 30th May 2016 7:43 am. Edited 2 times in total
Thanks - I have checked - they were both ok. The U0128 fault still appears after battery terminals were reconnected.
30th May 2016 7:41 am
dgardel
Member Since: 03 Nov 2009
Location: Greater Venice
Posts: 2025
I think the best thing to do now on your car is a HARD RESET, so that all the ECUs will realign.
May be check also the ground connections body-engine, body-chassis, ....Discovery 5 tdv6 HSE Corris Gray Outback Engineering Limited Edition IID Pro MV License
Thanks again... I did a hard reset when I put the battery terminals back on.
I will check the earth points.
It seems to me to point to a canbus issue though - as it only happens in hard offroad conditions - like when the e-diff is being asked to lock up some more.
I'm wondering if there is a canbus fault in the EPB or rear diff connector area? (Am I right to assume you have to take the wheel off and then take the wheel well liner out to see it?)
Can anyone answer the above question on the location of the EPB & eDiff connector location on a D4?
It's not where it appears to be in the D3 body off instructions from Disco_Mikey. I could only see the rear EAS cross-block there.
Thanks in advance.
Rob
31st May 2016 11:36 am
DDS789
Member Since: 06 Jan 2016
Location: Near Doncaster
Posts: 78
I had pretty much the same and water had got into the ECUs behind the battery.
Thanks for the hint. I wonder if dust could also get into there and cause problems? It hasn't rained here for ages, so don't think water is the culprit. I've been "tail-end-Charlie" on quite a few 4WD tours and dust was everywhere under the bonnet. About 3mm of dust over the top of the main battery - under the cover!
31st May 2016 12:09 pm
DDS789
Member Since: 06 Jan 2016
Location: Near Doncaster
Posts: 78
Ha didn't look at your location
Maybe
Or the wiring under the wheel arch?
I had nearly the same issues! Plus people get it after washing cars too??
Member Since: 06 Jan 2016
Location: Near Doncaster
Posts: 78
I'm no expert and a lot of my reading was after troubles with my D3
But I seem to remember talks of wires rubbing through on a harness under one of the front wheel arches/dust guards you have to take the wheel off and the mud guard out.
Your best Bet an auto electrician they can plug the canbus machine in and scan each wire supposedly!!
1st Jun 2016 3:15 am
DDS789
Member Since: 06 Jan 2016
Location: Near Doncaster
Posts: 78
Thanks - I've just seen your thread and it is a bit different... yours went into limp mode at random times in high range. Whereas mine turns the engine off completely - but only when in low range/rock crawl/on very rutted+steep hills. Mine drives perfectly in high range. <sigh>
Update: my mechanic thought the problem could be in the eDiff, so disconnected the eDiff connector and taped the male/female faces, then asked me to test it out. I drove up a muddy/steep forest and sure enough, it stalled again - as well as setting the date/time back to factory default. (01/01/2009).
I dropped it off at my mechanic last week and he had it on the hoist with it running - wiggled all the CAN bus connectors he could find. Even unplugged some... couldn't replicate the fault.
Next test he is suggesting, is plugging in his diagnostic machine while driving up a steep hill to replicate the fault.
Damned intermittent faults are such a pitb to find!
Cheers,
Rob
27th Jun 2016 5:55 am
Disco_Mikey
Member Since: 29 May 2007
Location: Dundee, Scotland
Posts: 20732
Does the P080 (Crank Sensor) also cover the 2.7 engine? Seems there is lots of the same issues going around My D3 Build Thread
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