Immobiliser removal

[800Days]

My 94 SSRX has an immobiliser that ideally I'd like to remove. I popped into my local auto-elec specialists to see if it was possible, they were far from helpful. I suspect they think I'd nicked the car as it was still on English plates and I'm in Guernsey (and I was wearing my hood up ). Anyway, they said, and I quote...

"It's impossible, it'll cost you about £600."

At which point due to the contradiction in that one sentence I instantly thought the bloke I was chatting too was clearly a moron (and he owned the place). Unfortunately it's the only auto-elec specialist on the island.

Anyway to cut a long story short, does anyone know if Jap import 94 Surf SSRX's came with factory fitted immobilisers or is the one on my car likely to be an after market add-on?

Does anyone have the relevant wiring diagrams if they did?

...and is the immobiliser programmed into the main ECU?

Can it actually be removed without buying a new ECU?

I'm no electrician but I'm sure it must be possible to remove it somehow, any advice would be much appreciated. Thanks.

[BUSHWHACKER]

An immobiliser wasn't a factory option, they're all after market.
Immobilisers are generally connected to the starter circuit in the multi-plugs under the steering column.
Remove the lower dash section above the pedals and you should see the multi-plugs (one black the other is white) with some obvious 'new' wiring soldered to various wires and covered in black insulation tape, coming from the ignition switch.
It's just a case of bypassing the the immobiliser by re-joining the wires that were snipped when it was fitted.
If you get stuck, photograph the plugs/wiring and I'l tell you what to reconnect.

[800Days]

Perfect, I shall start pulling it apart tomorrow and have a little look. Cheers BUSHWHACKER.

[Wolfracer]

Had mine REPLACED with a nice new, reliable one with all new wiring, Thatcham approved for £120 fitted.
But yes, as long as you can see where they are wired in it'e easy to reinstate the wiring. You do not even have to rejoin the original parts, you can just join the immobilisers black wires... and do it where you can see it!
Previous to having the new one fitted, I bypassed mine, but left the live feed attached so the little red LED still blinked...just a thought.

[Karma Supra]

Be careful about "joining the black wires" some immobilisers have more "kills" than just the starter circuit.

I just junked my horrid old imobiliser for a nice new remote start alarm, very pleased!

[Wolfracer]

Be careful about "joining the black wires" some immobilisers have more "kills" than just the starter circuit.

I just junked my horrid old imobiliser for a nice new remote start alarm, very pleased!

Sorry, meant using the black wires as "extensions" from the original loom, and not connected to the immobiliser. It just makes life that little bit easier.

[Karma Supra]

Ahhh, gotcha

[Ploddit]

Mine has a sigma S30 alarm and as it was fitted in 2005 i too thought of pulling it.

I managed to find and download the full install manual for £2.50 so with that a quick removal is possible.

Mine cuts out the glowplugs and the starter.

[evil_jesus]

Mine has a sigma S30 alarm and as it was fitted in 2005 i too thought of pulling it.

I managed to find and download the full install manual for £2.50 so with that a quick removal is possible.

Mine cuts out the glowplugs and the starter.

Do you still have a copy of the manual ? i have the exact same alarm and now my truck is dead as a dodo and i believe its the sigma s30 thats the issue.

[Ploddit]

Couldn't email it - to big.

So its on a FTP:

sigma_s_series_install_program _full.pdf

[MWW]

Hi guys - on the off chance does anyone have a copy of this s30 installation guide?

I’m having issues with the odometer and instrument cluster not lighting up. When unplugging the cables from the back of the speedo there is one which causes the cluster backlights to shut off. This wiring needs to be plugged in as it feeds in the speedo reading. It just so happens this is the same cable which feeds into / from the immobiliser wiring.... I think it needs taking out.