Disco 1 300 Tdi 1996 - Immobiliser Problem. Help!!

jacobscreek · Feb 7, 2014

this should answer a lot of your questions

The Definitive Alarm Spider Post - Land Rover Technical Archive - LR4x4 - The Land Rover Forum

jacobscreek · Feb 7, 2014

Worked bang on for me but I didn't bother soldering the unit, I just bought the bypass plug which replaces the unit. Never let me down again. let me know how you get on

Mo786 · Feb 8, 2014

Update - went this morning and picked up a spider unit, took the whole dash apart and guess what, no bastard spider unit. Put it all back together now

Mo786 · Feb 8, 2014

Going to run a direct feed to starter and fuel pump if the weather improves abit.

jacobscreek · Feb 8, 2014

Have you found the wiring and connector for the unit?

Mo786 · Feb 8, 2014

jacobscreek said:
Have you found the wiring and connector for the unit?

Had the whole dash apart this morning. no sign of a spider unit in my truck

Mo786 · Feb 9, 2014

Any other suggestions anybody, before it goes into the garage!!

devonlad108 · Feb 9, 2014

You have the 2 button locking so therefore no spider. it is all controlled from the alarm control unit. You will have a 3 wire DDS fuel immobiliser so very difficult to bypass. easyiest bet is to put a new ACU on. simply unplug the old one and plug in the new. i would recommend unplugging the alarm sounder. If you can, get one with the fobs already programmed, i.e. from a breaker. if you cant, you will need to gwet someone who can program fobs to the ACU

Mo786 · Feb 9, 2014

devonlad108 said:
You have the 2 button locking so therefore no spider. it is all controlled from the alarm control unit. You will have a 3 wire DDS fuel immobiliser so very difficult to bypass. easyiest bet is to put a new ACU on. simply unplug the old one and plug in the new. i would recommend unplugging the alarm sounder. If you can, get one with the fobs already programmed, i.e. from a breaker. if you cant, you will need to gwet someone who can program fobs to the ACU

Ok thanks. Do the numbers on the Acu have to match (current one is amr 6429) ive had a search and some have slightly different numbers on them.
Just going to be really hard to find the exact number (partcode) Acu.

discool · Feb 9, 2014

Yes they do, also the same frequency if u intend to reuse your fobs after they have been programmed to match the replacement ECU.

Better to purchase an ECU complete with fob/s.

Mo786 · Feb 9, 2014

discool said:
Yes they do, also the same frequency if u intend to reuse your fobs after they have been programmed to match the replacement ECU.

Better to purchase an ECU complete with fob/s.

Yes looking to purchase acu with fob - saves a lot of hassle
ive messaged loads of breakers, so fingers crossed

Mo786 · Feb 9, 2014

Anyone know anywhere to buy a ecu with fob?
Reasonably priced one.

Mo786 · Feb 12, 2014

Just got my replacement ecu (amr6429 Same as my old one) and fob from a breaker. Plugged it in and engine turns over but doesnt fire up.
Any suggestions lads?
Thanks

spuggy · Feb 21, 2014

had same problem with mine, in the end took the the edc pump off put a second hand old style pump on cost me £50 for pump, had to change injector pipes and brackets for kick down cables mine is auto, turned key and she started first time.

I went down the route of amr box and and fob but they will need coding into ecu in drivers footwell, but made no difference I put it down to electrics in pump, mine played up after some deep wading, ran fine for rest of day but after been parked up for week was dead on fob and ignition.

hope this helps

Mo786 · Feb 21, 2014

spuggy said:
had same problem with mine, in the end took the the edc pump off put a second hand old style pump on cost me £50 for pump, had to change injector pipes and brackets for kick down cables mine is auto, turned key and she started first time.

I went down the route of amr box and and fob but they will need coding into ecu in drivers footwell, but made no difference I put it down to electrics in pump, mine played up after some deep wading, ran fine for rest of day but after been parked up for week was dead on fob and ignition.

hope this helps

Yeh cheers mate - By-passed my immobiliser in the end.

LandyRover23 · Mar 20, 2014

hmmm mine is a 2 button fob and put the wiring spider in... still having to use immob fob will look at the ecu

barrier · Apr 21, 2014

ihave a similar problem with a 1992 tdi not a clue as what to do. no glove box either & no code key
HELP

Mick82 · Feb 25, 2021

Mo786 said:
Yeh cheers mate - By-passed my immobiliser in the end.

Hi I've done the same thing very deep lake fried the amr 6429 now disco want start bypassed to get engine turning over but want start, just wandering how you bypassed the immobiliser

discool · Feb 25, 2021

Mick82 said:
Hi I've done the same thing very deep lake fried the amr 6429 now disco want start bypassed to get engine turning over but want start, just wandering how you bypassed the immobiliser

Diesel? Check that there’s a 12v supply to the fuel cut off solenoid.

Mick82 · Feb 25, 2021

discool said:
Diesel? Check that there’s a 12v supply to the fuel cut off solenoid.

1997 2.5 tdi, yes 12v at fuel cut off solenoid and I've bridged wire so it now turns over and still will not start been reading up I think it immobilised in ecu

Disco 1 300 Tdi 1996 - Immobiliser Problem. Help!!

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