Thread: I really need help - Central locking/Alarm/Key fobs etc etc

Hi Ben,

If you can lock from the Buttons on the dash then at least the actual door electrics & fuses etc are all OK.

You can start the Car with your Keys so that proves that the Security Receiver can see the Key codes. ( Won't start without it )

Do you have any way to Read the fault codes ? It seems that the link from the Receiver to the Door control is the only part missing.

Richard

Ben,

I had a Discovery 3 key stop on me about 18 months ago and finally have gotten around to doing something about it.

The key was stuffed so there was little risk in cracking it open to see if the battery or something simple was at fault.

I checked the battery on the multi-meter and it was still at ~3.2V after nearly two (2) years which was a positive surprise.

What I did notice was a lack of resistance from the lug attached to the circuit board as I lifted the battery up to make contact with the multi-meter so I held a patch lead in place and it started working again.

It is now soldered it in place and it works a treat. Just have to buy some superglue to put the fob back together.

Some pictures are included for your reference.

This has only just been done on the weekend so there could be other references you can investigate further to help you out.

Over to you and hope this helps.

Cheers PK

Originally Posted by rb30gtr

Hi All,

So this ongoing issue I am having that started with my Key Fob not working has escalated to a pretty high point of frustration.

Issue 1: Key fob stopped working and car wouldn't lock/unlock or disable alarm or start.
Solution to issue 1: Bought new key from LR UK, had the key coded and matched, along with the original and the alarm disabled. $500, and 3 week wait.
*Both keys now work to unlock manually and start the car.

Issue 2: Still no alarm\central locking
Suggested solution: white green wire, check join under floor for 12v, yes present, also removed junction and re soldered join just to be sure.

Issue 3: Still no alarm/central locking
Suggestion solution: Purchase and replace alarm receiver unit in hood lining. So I did. $150

No result. The disco will still not lock or unlock via the key remotes, both the brand new and original one.

What else can be the problem, I have chased the wiring circuits all through the car, check voltages, checked all fuses??
And repeatedly banged my head against the brick wall.

Could it be a CJB issue? How do i check if it is?

I have read ever post on here and everywhere I can find any info

The car is usable, but only using the original key to manually unlock, then to re-lock I use the button on the dash and hold the door handle on the passenger side to close. Works but very inconvenient.

Sorry for constantly bringing this issue up, but I am really stumped.

Cheers,
Ben

Hi Ben, I'm not sure where in Sydney you are, but you might want to give this guy a call, Peter from Roving Mechanical 0410 503 500, he's a LR specialist in the southern Sydney area, if he can't get to you he may be able to give you some advice on what may be causing the issue or where to take it to have it looked at, oh and his hourly rate is very resonable, half that of a dealer.

Baz.

Thanks Richard,

I had a mechanic check the codes and it showed nothing, so from his experience his suggestion was to replace the alarm receiver.

I am also getting no activation of the alarm, or is that linked to the relationship between the door locks and receiver?

I am beginning to think the receiver I have tried is either not the right one or not working. As there is no earth connection on it and it seems the original was earthed to the roof via the bolt.

Have you done a receiver change?

Cheers,
Ben

I am not sure what has been done previously, but!

There are normally 2 stages to programming these keys (from a dealer point of view using SDD)(I am not sure how the Faultmate etc. works as I am not that familiar with them)

1st is to sync the keys to the vehicle especially when replacing a new key.
&
2nd is to program the keys to the vehicle.

It sounds like step 2 has been done but not step 1?

I would try reprogramming before taking the keys apart especially if you don't have too.

You also say that you disables the alarm in line 4, I can't understand why?

Cheers & good luck.

Sent from my iPad using Forum Runner

Originally Posted by sniegy

I am not sure what has been done previously, but!

There are normally 2 stages to programming these keys (from a dealer point of view using SDD)(I am not sure how the Faultmate etc. works as I am not that familiar with them)

1st is to sync the keys to the vehicle especially when replacing a new key.
&
2nd is to program the keys to the vehicle.

It sounds like step 2 has been done but not step 1?

I would try reprogramming before taking the keys apart especially if you don't have too.

You also say that you disables the alarm in line 4, I can't understand why?

Cheers & good luck.

Sent from my iPad using Forum Runner

Thanks Pete,

Keys are coded and programmed to the car, they send the signal to unlock the car but it wont unlock, or lock via the buttons on the FOB's.
Would a step be missing? I would assume the car would not start without the keys being programmed to the car?

Alarm was disabled by the mechanic so he could get in the car via the key manually and do the reprogramming process with the brand new key and original key. Also so I could manually enter the car and drive it.

I have already taken the original key apart and re soldered a new battery in, and it works perfectly fine to enter the car manually and start the car, and is charging and holding charge.

Has the receiver in the roof lining got power?

This sounds like the problem I had with my D3 where there was a power problem to the receiver.

Originally Posted by Redback

Hi Ben, I'm not sure where in Sydney you are, but you might want to give this guy a call, Peter from Roving Mechanical 0410 503 500, he's a LR specialist in the southern Sydney area, if he can't get to you he may be able to give you some advice on what may be causing the issue or where to take it to have it looked at, oh and his hourly rate is very resonable, half that of a dealer.

Baz.

Thanks Baz,
He actually was the guy I had inspect the car before purchase! Top bloke, but a little far away for me. I am in Western Sydney.

Next step is to drop the car off at Davis Performance, they have been great with all my questions and getting the Keys coded etc.

Cheers,
Ben