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[Yakko]

Hi.

Firstly, feel like I'm spamming the forum a bit at the moment, sorry, it's just the excitement of a new toy...

I've got the standard immobiliser fitted to early UK TJs (with the lock/unlock buttons on the fob). Only got one fob with the car, pretty scared about losing it.

If I were to procure another fob, does anyone know the procedure to sync it to the car?

Thanks.

[georgen]

Ive only got one too, so interested but knowing my luck the answer will prob be you cant

[Mike Pavelin]

Dealer only. You need a DRBIII scan tool with the May and Schofield security card.

[j33pky]

I have a spare fob if anyone wants one?  Will need to be programmed

[donk498]

Dealer only. You need a DRBIII scan tool with the May and Schofield security card.

Thats if you can find a dealer that A- knows what your talking about and B- still has the scan tool and card.

Alternatively got an uncoded ecu from the States and remove the immobiliser.

[Yakko]

Bah, not as simple as I'd hope then. On previous cars I've had you can sync additional fobs as long as you have one that works.

OK - thanks for confirming anyway.

Might end up doing the U.S spec ECU sooner rather than later - there's something unpleasantly crap about the immobiliser that I don't trust not to leave me immobilised when some blonde is willing to do ANYTHING for a lift...

Edit: Found this old thread (was linked through a different forum - Birtys is obviously the oracle for all things UK Jeep) which suggests "I've never tried this, but I'm told that if you turn the immobiliser off, start the engine let it run for at least 10 sec, then unplug the immobiliser the engine should continue to run. Next time you start it it should run without the immobiliser."

Anyone tried it?

Source: http://www.birtydastards.com/frm/index.php?topic=1441.0

[isle of man]

Thats me!!

Purchased the PCM from the US of A in the end, much simpler solution, and end of the MOFOing problem.

[Yakko]

Righto, is it as simple as going on American eBay and buying a ECU from a 4.0 of the same year?

If I get one, I'll either:

A - not fit it until my immobiliser packs up, enjoying the extra theft protection it offers (and also, enjoying the sods law that says if I buy a replacement, the original will never go wrong).

or

B - try that method described above, knowing that if it goes horribly wrong, I've got another ECU.

On a related note anyone know if old Wranglers are regular targets for thieves? I know Defenders have a real problem at the moment of being stolen and stripped for parts.

[isle of man]

Tell them the year, gearbox and the colour of the bloc connecters, it's that simple.

[Yakko]

Alright, brill. Thanks IOM.

Just to check, I take it the block connectors are as simple as the plugs on the jeep side that plugged into the ECU?

[isle of man]

Alright, brill. Thanks IOM.

Just to check, I take it the block connectors are as simple as the plugs on the jeep side that plugged into the ECU?

ECU It's called the PCM.

[Yakko]

OK, that's something learnt, thanks.

Just to check, I take it the block connectors are as simple as the plugs on the jeep side that plugged into the ECU PCM? Or is it the plug on the PCM itself (that seem to come in black or grey).

[Yakko]

Right, slight update to this.

Was suprisingly easy to get hold of a US PCM (same spec, year and plug colours), assuming it actually turns up, the PCM itself was cheap, but postage is not. Sods law says my immobiliser never dies and I won't need it, but I'd rather have it to hand, rather than try and get hold of it and wait for shipping with the Jeep out of action.

I've also got a brand new keyfob sat here, which I got free but I think is probably useless. If anyone has any bright ideas about how to get it working, they're welcome to it.