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help deactivating my alarm plz?


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#1 Scarface

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Posted 30 April 2007 - 08:52 PM

ryt i have a sidewalk spi 95, which the previous owner removed the immobilser/alarm from behind the dash, the car
started no problem for about six months as i still have the 101150 ecu, so i guess they got the ecu re flashed so it would work without the immoblisher relay/module.
I then wanted security back so i fitted a toad alarm system which worked fine for about 3 month, until a few days ago when i got bumped in the boot when my car was parked (the c1cks neva left there detail, no what car it was and the first 2 letters of the reg so if i eva c them again) n now the car wont start, we've been through everything step by step eliminating things and its down to the immobilser just wont switch off!

Ive heard the earth for the starter is through the ecu but with it having a aftermarket alarm i cant c it been this, the ignitions got power, the starter when shorted turns the car, the fuses are all fine. But it wont fire or turn over using the ignition, what do u guys recon i shud try?

#2 Sprocket

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Posted 30 April 2007 - 09:41 PM

Really can't comment on non standard equipment, Sorry dude

Edit**

The key switch supplies a live to the relay pack. If the original alarm ECU or router box has been removed then the ground for the starter relay will be connected to ground directly some where your imobiliser may have been wired to interupt this. This is the white red wire on the small connector on the relay pack and the white pink wire at the alarm ECU connector,be carefull and dont get confused, there are two white pink wires at the relay pack, and the white red and white pink wires swap through the body loom to engine loom connector.

Edited by Mini Sprocket, 30 April 2007 - 09:56 PM.


#3 Scarface

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Posted 01 May 2007 - 02:47 AM

ye the imobileser is wired itnto the red white, but when i bypassed the immobilser it still does nothing, ive got 1 or 2 things left to try yet, then its gonna get expensive because it'll be auto electrtion time

#4 Scarface

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Posted 03 May 2007 - 11:43 AM

hi im still having probs but iv had the car turning over now by hotwiring the starter and managed to get the fuel pump to prime but it still wont start. the old alarm wiring is still there n all i can c is the plug isnt been used anymore, apart from the white pink wire u mention been cut from the plug and wired into a black wire from the plug, the new immobiliser cuts the red white, but it isnt the alarm. Its 100% the wiring somewhere, we opened the relay pack to test that n tested each switch and they all worked but sumthin was shorting out b4 that, thats stopping the car from firing any ideas?

also whats the black and green rubber sorta pepet thing do on the drivers side of the engine bay at the back, its wired into the old alarm?

Edited by Scarface, 03 May 2007 - 11:45 AM.


#5 biggav

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Posted 03 May 2007 - 11:58 AM

you have reset the Inertia switch i take it?????

#6 Scarface

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Posted 03 May 2007 - 02:41 PM

ye tried that a few times

#7 Sprocket

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Posted 03 May 2007 - 04:29 PM

The inertia switch will only cut power to the fuel pump, not the starter as well. So if its not turning over then its not the inertia switch :)


Which white red wire are we talking about, The white red on the body loom or the white red on the engine loom??

when you turn the ignition switch to IGN position where the orange and red lights come on on the dash (not turning it over) can you hear the fuel pump run for about 10 seconds?


Personaly i think its your imobiliser, as the starter wiring is not that complicated, live feed from the key switch to the relaypack.

My car is running without the alarm imobiliser box with the plug disconnected, all i did was ground the white pink wire on the body side of the loom.

If its not the imobiliser, then its a broken wire, loose connection or a faulty key switch. I think you should get hold of a wiring diagram and follow it through.

I'll have a go at trying to get the diagrams I have posted up, but its going to be difficult as they are all copy protected on the disc I have. The other problem is that it is not specific to the pre 97 post 95 SPi, but the post 97 SPi ( dont say a word, They do exist.) It is closer than any of the pre 95 diagrams though.

Cant understand how a slight rear end bump could cause this. Its going to be something simple.

Oh and its not an Auto is it?

#8 Sprocket

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Posted 03 May 2007 - 04:31 PM

also whats the black and green rubber sorta pepet thing do on the drivers side of the engine bay at the back, its wired into the old alarm?


That is the communication link for the Facory fit Alarm/imobiliser, now redundant on your car.

#9 Scarface

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Posted 03 May 2007 - 05:36 PM

hi no its not a auto, erm the immobliser is cut into the white red wire behind the dash, no u cant hear the fuel pump kick in, it was totally disconnected so im sure it wasnt the immobilser now, erm i think its a broke wire to be honest because twice in the past wen ive been doin 70mph on a motorway the power would just die for litterally 2 secs the car would stop running cd player switch off etc n just free wheel then immidetly come back on, I just think the bump myt have just made whatever wire maybe broke short permantly i.e just moved it, everything works behind the dash but i had sumone test the relay box for me and he sed that that all fine but theres something shorting, took sum readings of one of the switches in the realy pack, so i was just wondeing what wires u would suspect so i can test these first, alminate the obvious first!

Erm would a faulty key switch stop the car from firing like i said ive had it turning over just not firing but this was through hotwiring the starter. I have a haynes manual so ill work through that wiring diagram i was just wondering weather anything was standing out to check just to save abit of time. Is it as simple as just checking he continuity at each end of the wire, or do i have to ispect each wire indavidually?

also i have alot of white, brown and white and red wires joined from 3-1 etc will this be to do with the removal of the old alarm?

sorry for the long post and thanks for the guidance

Edited by Scarface, 03 May 2007 - 05:43 PM.


#10 Sprocket

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Posted 03 May 2007 - 09:07 PM

http://www.theminifo...showtopic=46558

Have a read through that. It describes how the relay pack and ECU control the various bits, you can then work out the areas to look. Id be looking at the main battery supplies ( the big black wire front to back) the starter motor connection,and the power distribution wires from the starter to the rest of the engine and body loom.

Dont over look the ground wires either, the one for the ECU is very important, the one in the boot off the battery

#11 Scarface

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Posted 04 May 2007 - 04:41 PM

after reading that my first port of call i think will be the main relay pack side, ill be checking the main power feed to it as it seems this is where the power end to the starter motor and there is no noise from the fuel pump either ill be able to check it tomorow, thanks for ur guidance

#12 Scarface

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Posted 07 May 2007 - 06:23 PM

rite im now 95% sure its the ecu, took reading from everything and there all getting power, open the relay box up
and only one switch is moving across at the IGN postion, the white pink wire has power and we tried moving them across manually but that did nothing, can u just get the ecu tested without the car?

#13 Sprocket

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Posted 07 May 2007 - 06:59 PM

The ECU does not control the starter, if the starter is still not turning over then its not the fault of the ECU!!!!

The fuel pump and manifold heater relays are not energised untill the engine starts to rotate on the starter.

#14 Scarface

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Posted 07 May 2007 - 10:13 PM

rite i was getting abit confused with ur relay explantion but afeter reading through it several times and ur previous posts and refering it to a wiring diagram, i figured it went like this turn the key, the starter spins which the crank sensor pick up which tells the ecu to prime the fuel pump etc and then fires the car. Because i could get the starter to turn over but wasnt firing i checked all the leads in and out the starter, there are 5 fuses wires 3 together that run from the ecu/ left wing side then 2 others that run together one for the alternator and another which had burnt through, have a possible reason y, but iv replaced it and it now starts so il run it and c! It was one of the brown wires but when i looked at it, it goes to several places but one of the was the relay box which then made everything cinda click into place in my head!

thanks again for all ur help its helped me gain alot more understanding of my systems electrics and learned how easy the wiring diagrams are to follow.

A quick thing ive noticed is the white pink wire that goes from the old alarm plug to the ecu (ground i think) is wired to a black wire and its getting its ground from there instead, can i either run it direct to the body or wire my imobilser across this rather than the white red ignition, would it have any benifets?

Edited by Scarface, 08 May 2007 - 03:43 PM.





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