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Hdc fault brake switch help
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braddy2610
 


Member Since: 28 Oct 2018
Location: fleetwood
Posts: 13

United Kingdom 2005 LR3 TDV6 S Auto Barolo BlackLR3
Hdc fault brake switch help

I hope somone can help me ive got the dreaded hdc inactive fault ive changed the brake switch sensor but still get the fault ive checked the wires at the switch I get 12v at red 12v at green/orange now I cant tell which is green/purple or purple/green but I only get 12v at one of the not both is this correct ? or should all 4 be live? thanks for your help graham
  
Post #199653030th Oct 2018 7:56 pm
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Narpy
 


Member Since: 18 Jul 2011
Location: Stockport
Posts: 7830

2005 Discovery 3 TDV6 S Manual Cairns BlueDiscovery 3

Graham, it would be better if you detailed exactly what problem you're having and what seems to trigger your fault rather than suspect something that may not be accurate and possibly a million miles away from finding the fault. Wink

Is the battery in good order, any other symptoms, what dash lights are lit etc.
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Post #199653830th Oct 2018 8:14 pm
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braddy2610
 


Member Since: 28 Oct 2018
Location: fleetwood
Posts: 13

United Kingdom 2005 LR3 TDV6 S Auto Barolo BlackLR3

Brand new battery faults start as soon as I turn on ignition Hdc inactive and yellow lights cheers I've just tonight seem to have lost the radio the screen just staying on the land rover pic
  
Post #199654730th Oct 2018 8:29 pm
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Narpy
 


Member Since: 18 Jul 2011
Location: Stockport
Posts: 7830

2005 Discovery 3 TDV6 S Manual Cairns BlueDiscovery 3

You need to run the engine and stick a multimeter across the battery. Report back what voltage is shown.

Also, why did you replace the battery for a new one?
 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. 
 
Post #199656930th Oct 2018 9:30 pm
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braddy2610
 


Member Since: 28 Oct 2018
Location: fleetwood
Posts: 13

United Kingdom 2005 LR3 TDV6 S Auto Barolo BlackLR3

I have it's 12.6v not running 13.6v running
  
Post #199659831st Oct 2018 3:39 am
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braddy2610
 


Member Since: 28 Oct 2018
Location: fleetwood
Posts: 13

United Kingdom 2005 LR3 TDV6 S Auto Barolo BlackLR3

I change the battery as I did a load test on it and it failed so thought it was the root of my problems

I also have trouble going from 3 to 4 and sometimes get transmission fault
I have read the codes and get U0416-94 (invalid data received from dynamics control module)
and U0421-94 (invalid data received from ride level control module)
I am hoping its all related to one problem
  
Post #199660231st Oct 2018 5:37 am
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Narpy
 


Member Since: 18 Jul 2011
Location: Stockport
Posts: 7830

2005 Discovery 3 TDV6 S Manual Cairns BlueDiscovery 3

That alternator output is not good especially in this cold weather.

Best advice, fully charge the battery over night, see if the symptoms go but return a short while later.
From what you've already posted, and symptoms starting to get worse, I would suspect the alternator.
 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. 
 
Post #199660331st Oct 2018 5:39 am
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braddy2610
 


Member Since: 28 Oct 2018
Location: fleetwood
Posts: 13

United Kingdom 2005 LR3 TDV6 S Auto Barolo BlackLR3

Thanks I will try that tonight but would it do that with the battery only being a few days old looking in the sight glass it's still green? Cheers
  
Post #199663131st Oct 2018 9:31 am
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Narpy
 


Member Since: 18 Jul 2011
Location: Stockport
Posts: 7830

2005 Discovery 3 TDV6 S Manual Cairns BlueDiscovery 3

These beasts are very power hungry and somewhat sensitive + temperamental when there's not enough power in the battery.
Charge it, see what happens.
 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. 
 
Post #199663931st Oct 2018 9:58 am
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braddy2610
 


Member Since: 28 Oct 2018
Location: fleetwood
Posts: 13

United Kingdom 2005 LR3 TDV6 S Auto Barolo BlackLR3

so ive just checked again engine running at 1500rpm turn lights on high beam heated seats and heating it went from 13.5v to 13.4v so its on charge tonight i hope you are right and its the alternator Very Happy
  
Post #199676731st Oct 2018 4:32 pm
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John Andre Ognheim
 


Member Since: 29 Oct 2013
Location: Bergen
Posts: 110

Norway 2006 Discovery 3 TDV6 HSE Auto Bonatti GreyDiscovery 3

Charge voltage below 14 volts, i would consider as to low.
Should be 14,5 volt +/ -
According to Sønnak, charging voltage should be 14,5 at room temp. ay 50 degrees, 13,8 volt.
Around 0 degree celsius, 15 Volt.

For every 10 degree celsius outside temp lowers, charging voltage should increase with 0,3 volt.

D3 I believe compensate for the temperature, and some other parameters when adjusting the voltage.

Mine`s very often around 15 volt the first minutes of driving, then i lowers to 14,4- 14,5 volt.
 D3, MY06  
Post #19969211st Nov 2018 2:58 am
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braddy2610
 


Member Since: 28 Oct 2018
Location: fleetwood
Posts: 13

United Kingdom 2005 LR3 TDV6 S Auto Barolo BlackLR3

Ok cheers
  
Post #19969261st Nov 2018 5:23 am
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braddy2610
 


Member Since: 28 Oct 2018
Location: fleetwood
Posts: 13

United Kingdom 2005 LR3 TDV6 S Auto Barolo BlackLR3

Ok so the good news ive fitted new alternator getting 14.5v now and seems to have sorted the gearbox out touch wood ,Bad news I still have suspention fault HDC ive changed the steering angle sensor as it was not registering as working ive come to code it but it looks like its not communicating so im guessing a corroded wire somewhere.

Now I have found a little connector near the osf near the pedals that was all green and corroded when I moved this the sound went of from the stereo im wondering if this is for anything else or just the radio

thanks for your help
  
Post #19974823rd Nov 2018 11:23 am
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braddy2610
 


Member Since: 28 Oct 2018
Location: fleetwood
Posts: 13

United Kingdom 2005 LR3 TDV6 S Auto Barolo BlackLR3

Any help please
  
Post #19980145th Nov 2018 10:36 am
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braddy2610
 


Member Since: 28 Oct 2018
Location: fleetwood
Posts: 13

United Kingdom 2005 LR3 TDV6 S Auto Barolo BlackLR3

Bad news gearbox back to not wanting to shift from 3rd to 4th gear any ideas ?
  
Post #19982286th Nov 2018 7:53 am
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