Immobilizer and battery prob - Help

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diabloam

Member
Posts
10
Hi all

Any pointer on root problem of this would be nice.

Came back after being away and missus said our Disco II V8 fob wasnt working and when she got in (it had been left unlocked anyway) there was nothing from the starter. She also said the sun visor dripped water on her from time to time(Come back to that), after she had only left car for a day. I checked battery and it was saying 12v on the dot, bit low I thought and it looked old. So bought a new battery and fitted it. Still nothing from key fob (new fob was coded by dealer in October) or from starter. I noticed when trying to turn her over the red immobilizer light was on. So locked and immobilized I think. Checked I have right EKA code with dealer and proceeded to try that. First attempt at end it honked once at end of sequence(fail), next it honked half way through (fail), third attemt I get double honk at end (success according to manual), leave it for the required five mins, waiting for the, now slow, flashing immob. light to extinuish as per required. Anyway it doesnt go out, but after five mins it start to flash rapidly rather than go out. So I jump in a low and behold, she starts up fine. Go for a drive and come home and decide to have a well earned cuppa and a smoke, leaving the car unlocked but noticing that the fob still aint working.

Come back out, expecting it to start no bother, and find its reverted back to being immobilized (light on solid when trying to turn her over).

I thought they are supposed to stay un-immobilized after doing EKA? Why has it reverted back.

When doing EKA I can feel my key and the lock mechanism not being happy (key feeling like its going to snap, although the mechansim isnt really that stiff) but its not something I wish to do often.

What issue caused the disco to immobilize itself in the first place as it had been left unlocked. Why did it rearm itself after being ok and only been left for twenty mins or so. And did i read something about the fob reciever being prone to water damage (can they also cause battery to go flat?), looks like I have a little dampness above my sun visor. Anyway she is sitting outside unlocked and I aint sure what to do next? Just changed the fob battery and no difference

As always any help really appreciated. Only posting as unsure what step to take next?
 
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The receiver has nothing to do with immobilising the engine, it just receives a signal from the keyfob to lock and set the alarm or unlock and unset.

Your immobiliser is "passive" therefore will set by it's self, to remobliise the engine is by placing the key in or near the ignition switch.

Using the EKA code will allow remobilising, until you lock the vehicle then you will again have to enter it the next time.

All the info is in the owners handbook.
 
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The receiver has nothing to do with immobilising the engine, it just receives a signal from the keyfob to lock and set the alarm or unlock and unset.

Your immobiliser is "passive" therefore will set by it's self, to remobliise the engine is by placing the key in or near the ignition switch.

Using the EKA code will allow remobilising, until you lock the vehicle then you will again have to enter it the next time.

All the info is in the owners handbook.


Hi, I never locked it after getting it running after putting EKA code in, just let it run a while and then turned it on. Why had the fob stop working in first place, thats why i thought of reciever, anyy suggestions guys?
thanks
 
It a known issue that the receiver above the rear headling can go faulty due to dampness in that area, it's just a plug & play replacement. The fob battery may also require replacing if the locking/unlocking is not operating.

When unlocking the engine will be remobilised for a short while indicated by the red LED extinguishing then it will return if you delay in starting, then just placing the key by the ignition-switch will remoblised the engine again.
 
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Hi, yes thats whaty i thought but it aint getting reimmobilized when putting key into ignition. Also surely if the reciver was faulty then it shouldnt have affected it after I got it going after doing EKA. It should have just been passive immobilized and that should have been dis-armed when i put key into igntion? Any ideas?
 
1. check fuse F20 in engine bay, if it's good there is the chance that the passive remmobilisation exciter coil is fubar'd

2. to make sure get it plugged in a dedicated tester and disable passive immobiliser then see how it goes

read carefully the attachment
 

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