Member Since: 05 Mar 2017
Location: Bridgend
Posts: 10
HDC Fault - D3 HSE Auto
Evening all,
I'm desperately pulling my hair out with an ongoing issue and would really appreciate some advice before I spend more money trying to fix it.
Approximately 4 weeks ago, I was driving along and as I began to climb a hill, there was an audible warning with amber lights coming up on the dash as follows:
Click image to enlarge
It states something like "HDC Fault, System not available", then a couple of seconds later it gives another audible warning and then the it says the suspension is lowering and has limited gears.
I had to pull over because it has no power. It finally came up with parking brake Fault just as I stopped.
I switched off the engine, and restarted it which seemed to clear the Fault and I was able to proceed on my journey up the hill.
Ok, so on my return journey home, it drove for about 10 minutes and it happened again. I followed the same procedure and it cleared the faults accordingly. It didn't happen again following this and I was able to drive home, albeit warily.
The next day, it happened again, but this time it was on the flat, and only when accelerating. I don't recall it being a bend in the road though. I do remember it happening several times and in the end, I decided to stop driving it until I could get it in a diagnostic machine.
I took it to a garage, and he ran the machine which flagged loads of faults. He cleared these and said to drive it about and bring it back if it happened again.
The next day, it did happen again and so I took it back and again it was showing multiple faults as follows:
Diesel
P0087 - Intermittent Fuel Rail/System Pressure too Low
U0121 - Historical CAN communication with ABS
U0416 - Intermittent invalid data received from vehicle dynamics control module
U0416 - Historical invalid data received from vehicle dynamics control module
Brake (ABS)
U0401 - Historical invalid data received from engine control module/powertrain control module
Brake (PBM)
U3FF0 - Intermittent diagnostic trouble code
U3FF0 - Intermittent diagnostic trouble code
U3FF0 - Intermittent diagnostic trouble code
Instrument (instrument - Diagnose)
U0132 - Intermittent Lost communication with ride level control module
U0159 - Intermittent No Communication with parking assist control module
U0122 - Historical lost communication with vehicle dynamics control module
U0184 - Historical communication with audio module (AUD)
B1A87 - historical disconnection/control unit reset
Climate (AHCM)
U1A44 - Intermittent fuel level
U3000 - Intermittent control module
Climate (HVAC)
B1B74 - historical front foot-defrost mode stepper actuator
B1B75 - Intermittent front door-face mode stepper actuator
B1B76 - Historical front left air blend stepper actuator
B1B77 - Historical from right air blend stepper actuator
B1B78 - Historical system pressure
B1B82 - Intermittent rear air distribution stepper actuator
B1B83 - Historical rear air blend stepper actuator
Gearbox
U2023 - intermittent Fault received from external node
U0122 - pending Lost communication with vehicle dynamics control module
Gearbox (Transfer case)
U0122 - Intermittent lost communication with vehicle dynamics control module
Restraints (Airbags)
U0122 - Intermittent lost communication with vehicle dynamics control module
Multifunction (AAM)
B1A05 - Permanent Speaker 5
Multifunction (ACM)
U3000 - Historical control module
U0010 - Historical medium speed CAN communication Bus
U0300 - Intermittent internal control module software incompatibility
U1A03 - Intermittent vehicle configuration
U2003 - Historical fibre optic communication Bus
Multifunction (ATCM)
U0122 - Intermittent lost communication with vehicle dynamics control module
U0401 - historical invalid data received from engine control module/powertrain module
U0402 - Historical invalid signal from TCM
U0416 - Historical invalid data received from vehicle dynamics control module
U0403 - Historical invalid data received from transfer case control module
Multifunction (FLM)
U0400 - Historical invalid data received (event diagnostic trouble code)
U0001 - Intermittent high speed CAN communication Bus
Multifunction (RLM)
U0122 - Intermittent lost communication with vehicle dynamics control module
U0416 - Historical invalid data received from vehicle dynamics control module
Multifunction (Steering System)
U0122 - Intermittent lost communication with vehicle dynamics control module
U0300 - Historical internal control module software incompatibility
Multifunction (TEL)
U0029 - Permanent vehicle communication Bus "A" performance
The garage did check the ABS module connection and said there was some moisture in there, so he sprayed it and sealed it and the car ran lovely for 2 days, but it happened again.
I've had a new battery fitted since, changed the relay for the fuel system and also changed the fuel filter which was really clogged but it's still playing up.
The garage believe it's something to do with the ABS module but another garage seem convinced it's the fuel system and wan me to take it in for a new fuel pump in the tank.
I've had new tyres fitted, and discovered the rear bushes are shot, and I recall hearing it knock just before the Fault came back (could this be the cause somehow?)
Any advice will be greatly appreciated.
Many thanks
Rick
17th Apr 2017 11:02 pm
RicksD3
Member Since: 05 Mar 2017
Location: Bridgend
Posts: 10
Also, I've had a look under the front passenger wheel arch to see if there are any obvious broken wires or loose connections and I found this connector just hanging there next to the screen washer bottle:
Does anyone know what this is for is it anything to do with my issues?
I had a similar issue in Spain last year, the car suddenly developed an HDC fault while at speed on the motorway, followed by abs, DSC, brake warning and the suspension would lower, but not into limp home mode.
I was actually in Gibraltar when it happened and the local Landrover dealers , said it would not cause me any issues on my way back to the UK - no problem sorted it out when I got home.
The historical faults are from the manufacturing setup, the others are the relevant ones. Virtually the same list I had.
On investigation I traced it to an intermittent short (due to arcing) of the foot pedal brake switch. Took it out, stripped it down and gave it a good clean, reassembled and was as good as new otherwise a genuine replacement is silly money about £25+ or an OEM part with 2 year warranty less than a tenner including p&p.
It is a known fault that this switch can cause a host of problems putting noise onto the CAN bus network causing lots of the modules to throw a hissy fit, similar issue with the wrong specification light bulbs! typical of landrover.
It's worth having a look at the switch if you are confident enough to do it
good luck
MikeMike
22nd Apr 2017 10:35 pm
Disco_Mikey
Member Since: 29 May 2007
Location: Dundee, Scotland
Posts: 20727
Quote:
P0087 - Intermittent Fuel Rail/System Pressure too Low
First port of call is a new OEM fuel filter
If no joy, the health of the LPFP should be checked
Member Since: 05 Mar 2017
Location: Bridgend
Posts: 10
Re: Similar experience in Spain
MELISCAT wrote:
I had a similar issue in Spain last year, the car suddenly developed an HDC fault while at speed on the motorway, followed by abs, DSC, brake warning and the suspension would lower, but not into limp home mode.
I was actually in Gibraltar when it happened and the local Landrover dealers , said it would not cause me any issues on my way back to the UK - no problem sorted it out when I got home.
The historical faults are from the manufacturing setup, the others are the relevant ones. Virtually the same list I had.
On investigation I traced it to an intermittent short (due to arcing) of the foot pedal brake switch. Took it out, stripped it down and gave it a good clean, reassembled and was as good as new otherwise a genuine replacement is silly money about £25+ or an OEM part with 2 year warranty less than a tenner including p&p.
It is a known fault that this switch can cause a host of problems putting noise onto the CAN bus network causing lots of the modules to throw a hissy fit, similar issue with the wrong specification light bulbs! typical of landrover.
It's worth having a look at the switch if you are confident enough to do it
good luck
Mike
Hello and thanks for your reply...
I've been offline for a little while, but in that time, the car has been in a garage and the ABS module has been sent away for testing. They found a dry joint in the "PCB" and have repaired this.
The car has been to Badminton Horse trials and back no problem (over 300 miles round trip), but the fault has come back today when all I was doing was driving at 50mph in a straight line up a slight gradient.
I've not yet tried the brake switch, but will certainly have a look at this now.
Many thanks
Rick
7th May 2017 5:23 pm
RicksD3
Member Since: 05 Mar 2017
Location: Bridgend
Posts: 10
Disco_Mikey wrote:
Quote:
P0087 - Intermittent Fuel Rail/System Pressure too Low
First port of call is a new OEM fuel filter
If no joy, the health of the LPFP should be checked
IN a few cases, the HPFP can be at fault...
So the car has had a service and a new filter (genuine part) was fitted.
The filter was really blocked up in fairness, but the car has driven on a 300 miles round trip no problem yesterday. but then has gone again today...
It seems to improve when the ABS module is disconnected and then reconnected???
I'm at my wit's end with it now and am starting to wonder what my options are as I can't afford to keep pumping money into it. I really want to enjoy this truck.
All the best,
Rick
7th May 2017 5:26 pm
Narpy
Member Since: 18 Jul 2011
Location: Stockport
Posts: 7830
Recalibrate the steering angle sensor and see how you get on. Mods:
Front Fogs + Halos
FBH Remote Control
The 1st Ever RRS Modded Grill
Garmin Nuvi + D4 Surround + Reversing Camera.
D4 Steering Wheel.
Rear Boot Spoiler.
Twin Brake Lights.
Wing Mirror Indicator Repeaters.
Long Roof Rails
Make your own Narpy grill thread
I'm not scared, I'm outta here.
7th May 2017 6:12 pm
KostasA
Member Since: 23 Aug 2015
Location: nairobi
Posts: 286
i think Disco Mike said it all. That would be my guess as well.
Mike, out of curiosity do you have most cases with LPFP than HPFP? reason am asking is that by reading this forum i get the felling that HPFP is most common.
7th May 2017 6:24 pm
RicksD3
Member Since: 05 Mar 2017
Location: Bridgend
Posts: 10
Narpy wrote:
Recalibrate the steering angle sensor and see how you get on.
I'll certainly enquire about this, thanks.
7th May 2017 8:05 pm
RicksD3
Member Since: 05 Mar 2017
Location: Bridgend
Posts: 10
KostasA wrote:
i think Disco Mike said it all. That would be my guess as well.
Mike, out of curiosity do you have most cases with LPFP than HPFP? reason am asking is that by reading this forum i get the felling that HPFP is most common.
Thanks for the reply.
Out of curiosity, what is the process for checking the health of the LPFP / HPFP?
Thanks
Rick
7th May 2017 8:06 pm
RicksD3
Member Since: 05 Mar 2017
Location: Bridgend
Posts: 10
Re: Similar experience in Spain
MELISCAT wrote:
I had a similar issue in Spain last year, the car suddenly developed an HDC fault while at speed on the motorway, followed by abs, DSC, brake warning and the suspension would lower, but not into limp home mode.
I was actually in Gibraltar when it happened and the local Landrover dealers , said it would not cause me any issues on my way back to the UK - no problem sorted it out when I got home.
The historical faults are from the manufacturing setup, the others are the relevant ones. Virtually the same list I had.
On investigation I traced it to an intermittent short (due to arcing) of the foot pedal brake switch. Took it out, stripped it down and gave it a good clean, reassembled and was as good as new otherwise a genuine replacement is silly money about £25+ or an OEM part with 2 year warranty less than a tenner including p&p.
It is a known fault that this switch can cause a host of problems putting noise onto the CAN bus network causing lots of the modules to throw a hissy fit, similar issue with the wrong specification light bulbs! typical of landrover.
It's worth having a look at the switch if you are confident enough to do it
good luck
Mike
I've had the switch out this evening and stripped it down... I've taken a picture of the inside:
As you can see, there is clearly some evidence of something going on with the black soot and the copper contacts seemed to be slightly corroded.
I've since given this a good clean and put it back on the truck. Taken it for a spin and so far so good. The brake lights still work too.
Could t have been this simple?
Thanks
Rick
7th May 2017 8:12 pm
Narpy
Member Since: 18 Jul 2011
Location: Stockport
Posts: 7830
It's possible only time will tell.
Have a read here, might help: http://www.disco3.co.uk/forum/topic155313.htmlMods:
Front Fogs + Halos
FBH Remote Control
The 1st Ever RRS Modded Grill
Garmin Nuvi + D4 Surround + Reversing Camera.
D4 Steering Wheel.
Rear Boot Spoiler.
Twin Brake Lights.
Wing Mirror Indicator Repeaters.
Long Roof Rails
Make your own Narpy grill thread
I'm not scared, I'm outta here.
7th May 2017 8:32 pm
RicksD3
Member Since: 05 Mar 2017
Location: Bridgend
Posts: 10
Thanks for the link, really interesting reading.
The problem did start when I ran the fuel level low... can the pump be flushed out at all??
Thanks
Rick
7th May 2017 8:52 pm
KostasA
Member Since: 23 Aug 2015
Location: nairobi
Posts: 286
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