Member Since: 28 Jul 2014
Location: SE Wales
Posts: 34
Help with HDC Fault, suspension on stops
Hi
Bought a D3 from a fellow forum user last year. All has been well and have loved the car. However its had a few intermittent HDC fault errors and now its developed one that won't go away. If I list some symptoms and what I've done so far maybe someone can give me some clues about what else to check.
Disco 3 05 SE (non sunroof)
- HDC fault, three amber warning symbols on dash (roll warning, ! triangle and (!) ), ride height switch inoperative, low and standard lights are both lit on the switch, 4x4 info on sat nav is reporting wrong settings. Suspension has lowered itself to the stops so very harsh ride. Previously it has done this and it would rectify itself after turning off the ignition for a bit and back on, raising then lowering the suspension so it lands back into standard mode. Now it's just stuck.
- Other symptoms are the indicators lighting solidly rather than flashing when unlocking the doors. They flash normally when locking - perhaps this is normal and I have never noticed before?
- Car alarm going off. Had to disconnect the battery overnight.
- Replaced some blown brake lights (GE from Halfords) and when the drivers side cluster was off the car started acting up: central locking cycling constantly, hazards flashing, and aforementioned car alarm. Suspect electrical/wiring fault.
- Checked brake switch. Dismantled found black powder inside. Cleaned all contact points inside switch continuity good, refitted. Still had HDC faults.
- After a night with no battery I hooked it up this morning and got no errors, was able to raise the suspension and set to standard height. Drove round the block and got the HDC fault again!!
- Found water under drivers side door mat, sopping wet, cabling a bit wet but not found any worn or broken cables. Couldn't get the sill cover fully off though to check further back (how to do it?)
- battery is new, but reading 11.0v from radio info, Halfords say its fine (read 11.8V on their tester)
- removed battery, looks dry behind it.
- Tried a hard reset by shorting the cables. Still got HDC fault.
19th Jan 2016 5:53 pm
mx468
Member Since: 12 Dec 2012
Location: Middletown, Rhode Island
Posts: 367
Battery voltage too low!
Your battery voltage is too low. Should be reading in the 12's and around 13.85 - 14 plus volts when running. You might have a bad cell in the battery. How old is the battery? Even after changing the battery I would have to drive my Lr3 around and shut it off and restart before all my dash lights/codes would disappear.Narpy's Grill Mod, Suspension Rods, Ultra guage, wrangler Goodyear duratracs 265/60/18, new thermostat, diff oils changed, brake switch new, aluminum rack floor, LED driving lights in foglights, rear camera, just need gvif unit, next on list! New front arb bushings, new front valve block, 191,000 miles.
19th Jan 2016 7:22 pm
massless
Member Since: 28 Jul 2014
Location: SE Wales
Posts: 34
Battery was replaced recently, say 2-3 months old. I was having HDC errors with the old one which was genuinely knackered, and the faults did seem to clear up once the new battery was installed.
Halfords checked this battery and said it was good. Does it have to be out of circuit to be checked correctly?
Just nipped out to check again, and its reading ~12.0-12.5V and rising to 14.0-14.8V with the engine running.
(could have been low earlier as I'd been dicking about with it for about an hour)
19th Jan 2016 7:35 pm
mx468
Member Since: 12 Dec 2012
Location: Middletown, Rhode Island
Posts: 367
Did you replace your brake lights with genuine bulbs? Also I would just buy a new brake switch, they are pretty cheap. Do you know anyone with a code reader? I would get my codes read before throwing anymore parts at the truck. I just bought a TF i930 carsoft reader for the Landrover and its pretty awesome for diagnosing codes for our trucks. $140.Narpy's Grill Mod, Suspension Rods, Ultra guage, wrangler Goodyear duratracs 265/60/18, new thermostat, diff oils changed, brake switch new, aluminum rack floor, LED driving lights in foglights, rear camera, just need gvif unit, next on list! New front arb bushings, new front valve block, 191,000 miles.
19th Jan 2016 7:46 pm
massless
Member Since: 28 Jul 2014
Location: SE Wales
Posts: 34
No, GE bulbs. They are decent quality.
Just had the alarm go off again. Went out and unlocked it and it was power cycling again. Sat Nav flicking on and off along with the hazards and central locking, once a second or so.
It's frosty out, and I seem to remember last time I had problems it was a cold snap too.
19th Jan 2016 10:10 pm
massless
Member Since: 28 Jul 2014
Location: SE Wales
Posts: 34
Any LR specialists in the South Wales area? Don't want to have to take it to the stealers if I can help it
20th Jan 2016 8:27 am
massless
Member Since: 28 Jul 2014
Location: SE Wales
Posts: 34
Thinking of taking it to Promec in LLantrisant...
20th Jan 2016 9:50 am
.olli.
Member Since: 17 Dec 2015
Location: Hampshire
Posts: 83
I had HDC fault (and all sorts of other errors) due water ingress and corrosion of the Transmission Control module.
Had to have the ECU replaced in the end.
I strongly suspect it occured after my engine bay was valetted just before I picked up the car from the dealer, as it was immaculate. Thankfully had the work done under warranty.
20th Jan 2016 11:31 am
massless
Member Since: 28 Jul 2014
Location: SE Wales
Posts: 34
I noticed the engine bay is very clean too. Might ask the seller if they had if valleted
Car has no sunroof so I was surprised about the water
20th Jan 2016 12:01 pm
.olli.
Member Since: 17 Dec 2015
Location: Hampshire
Posts: 83
You can check the transmission control ECU quite easily, it is just under / behind the battery. Connections are on the top of it so very accessible.
I wish dealers would not bother with cleaning engine bays! Adds no value for me, but can cause loads of grief if done incorrectly!
Just for clarity, it's the Transfer Case Control Module (TCCM) behind the battery; the Transmission Control Module (TCM) is located within the transmission.
The A-pillars and scuttle panel can be another source of water ingress besides the sunroof. The Ride Level Module is at the bottom of the driver's side A-pillar so water ingress there can occur - so that's a possibilty.
I would start by replacing the brake switch, charging the battery and checking the CANBUS wires (typically, such issues are found in the wheel arches or around back by the EPB module). Current: Discovery 3 06MY (55 reg) HSE Auto Zambezi Silver Allisport Fast Road Intercooler, V8 Brakes, Silicone IC Hoses, EGRs Blanked, Remapped, De-Cat pipe, FBHIC
Freelander 2 2007 HSE Manual Tambora Flame
Previous: FL2 56 reg SE Manual Black (written off )
Disco 3 06 reg B7S Manual Rimini Red
Disco 2 TD5 Y reg ES Manual Blue - Chipped
Several Discovery 300 TDis
20th Jan 2016 12:13 pm
massless
Member Since: 28 Jul 2014
Location: SE Wales
Posts: 34
Battery is 2-3 months old, replaced it end of last year as cold snap started some similar issues. Will buy a new brake switch but have already dismantled and cleaned it and continuity is ok.
Will try to investigate wiring. Do you mean it's outside the vehicle shell but under the plastic wheel arch cowels? Couldn't get the plastic sill wiring cover under carpet off as that's where the wet is. But noticed two black wires with exposed copper that were corroding. They weren't worn or shorting just short of sheathing.
Will need to figure out what a lot of the bodywork jargon is as I don't know my A pillar from my elbow!
20th Jan 2016 1:00 pm
.olli.
Member Since: 17 Dec 2015
Location: Hampshire
Posts: 83
Lost for Words wrote:
Just for clarity, it's the Transfer Case Control Module (TCCM) behind the battery; the Transmission Control Module (TCM) is located within the transmission.
Battery is 2-3 months old, replaced it end of last year as cold snap started some similar issues.
You may have misread charging as changing?
Quote:
Do you mean it's outside the vehicle shell but under the plastic wheel arch cowels?
Yup. All manner of problems can originate at the connectors and wiring there.
Quote:
Couldn't get the plastic sill wiring cover under carpet off as that's where the wet is. But noticed two black wires with exposed copper that were corroding. They weren't worn or shorting just short of sheathing.
Hmm, I think that could be related, or it could not be. You seem to have so many factors that it's hard to tell what's cause, what's effect and what, if anything, is irrelevant!
Quote:
Will need to figure out what a lot of the bodywork jargon is as I don't know my A pillar from my elbow!
The pillars are named A, B, C and D from the front to back. Problems of water ingress due to loose A-pillar trims are quite common. Current: Discovery 3 06MY (55 reg) HSE Auto Zambezi Silver Allisport Fast Road Intercooler, V8 Brakes, Silicone IC Hoses, EGRs Blanked, Remapped, De-Cat pipe, FBHIC
Freelander 2 2007 HSE Manual Tambora Flame
Previous: FL2 56 reg SE Manual Black (written off )
Disco 3 06 reg B7S Manual Rimini Red
Disco 2 TD5 Y reg ES Manual Blue - Chipped
Several Discovery 300 TDis
Just for clarity, it's the Transfer Case Control Module (TCCM) behind the battery; the Transmission Control Module (TCM) is located within the transmission.
Sorry TCCM the one I meant!
No need to apologise. Current: Discovery 3 06MY (55 reg) HSE Auto Zambezi Silver Allisport Fast Road Intercooler, V8 Brakes, Silicone IC Hoses, EGRs Blanked, Remapped, De-Cat pipe, FBHIC
Freelander 2 2007 HSE Manual Tambora Flame
Previous: FL2 56 reg SE Manual Black (written off )
Disco 3 06 reg B7S Manual Rimini Red
Disco 2 TD5 Y reg ES Manual Blue - Chipped
Several Discovery 300 TDis
You cannot post new topics in this forum You cannot reply to topics in this forum You cannot edit your posts in this forum You cannot delete your posts in this forum You cannot vote in polls in this forum
Allisport Fast Road Intercooler, V8 Brakes, Silicone IC Hoses, EGRs Blanked, Remapped, De-Cat pipe, FBHIC
