Hi guys

New to this forum as when I was searching for some advice I found a post on here similar to my problem.

I have put a mk1 2003 focus rs engine in to a mk6 2005 fiesta

As current engine is in and ecu is wired in, car turns over fuel pump primes , the problem I have is with the immobiliser, now I have a key chip that matches the ecu.

But as the fiesta seems to use a diffrent path than the focus the ecu doesent see the signal from the chip, the post I found on here is showing wiring the halo direct to the 2 ecu immobiliser wires.

Can anyone confirm if this will work for the 2003 focus rs ecu, the ecu pinout shows the wires going to immobiliser control module (which I think is the multifunction control module from what I can find)

Any help greatly appreciated and thanks again

Is this my post you are referring to ?

The ford uses two forms of security.

Passive anti theft system. (Immobilizer)

Active anti theft system. (alarm)

Both see the signal from the transceiver around the ignition barrel. This is why the diagrams you are using show the connection to the body unit.

I never cover the alarm unit as engines I do go into kits ect and the immobilizer will work independent from the alarm.

Ive done the st170 and the mk1 Rs (turbo zetec) shares a lot of pin outs with the the St170. Infact there are fewer engine sensors on the Rs than the St.

Where in the world are you ? I want to do an Rs ecu but havnt found a cheap one yet.

But to get back to your question, yes the info in my post crosses over to the Rs. Are you providing the transceiver with switched live and earth ?

Hi, thanks for your reply

http://www.locostbuilders.co.uk/viewthread.php?tid=179921

This is the post I found

I'm in aberdeen scotland.

I have not removed the halo from the original fiesta loom as I thought I would try find the info I needed first to make sure it's possible

So what I will do now is extend the 2 wires (3 and 4) from the halo down to the two immob ecu wires , I can't remember the pins of the top of my head but as your thread says I do remember that they are green/white and grey/orange

This advice is invaluable as if I hadent found it I would have been banging my head off the wall for ages

Thanks so much

Oh and the fiesta alarm system seems to be functioning properly as I haven't touched the car loom so to speak, it's just the ecu immobiliser I was having issues with

Thanks

So are you using the Rs rdif chip in the fiesta key ?

I would be checking you have power to the transceiver as the engine control relay may not be energising.

just check you have 12 volts to it when its cranking.

Like I say since the post your working from ive done a 2004 st so I KNOW that I can do the mk1 Rs.

When I got the ecu/engine/loom I never got the key as the guy had lost it, I sent the ecu to a place not to far away and they coded another chip to the ecu for me, the chip I got is slightly bigger than the one in the fiesta key so I may have to do the old halo hidden behind the dash thing, this just means there will be no real theft protection ( apart from the alarm that is)

I haven't checked for power to it yet but I will in the morning , as now I know it will work :-)

I will give you a shout and let you know how I get on

Thanks

That's cool stuff in that video

I am interested in the costs and firm that did your recode as I tell any one that no chip and the ecu is a paper weight based on the fact Ford wont do just an ecu for anti theft reasons.

Also the transceiver is very fussy on proximity of the chip. To close or far away and it wont read. If you place it with another chip it may not read.

It was a place called autotronics in the uk that done the coding and it was around the £100 mark, they did take a while to do it, they had the ecu for a few weeks , the new chip was in a small glass tube . I have removed the original chip from the key so I guess it's just a case of getting it positioned properly.

But I will try tomorrow and will see if the new chip does work..... Which I really hope it does

Thanks

And yes your right as I was doing work on one before and trying to have 2 chips close to the recover would just confuse the ecu, it would only work with the correct one and only that one next to it

Yeh standard one is glass. They have a little plastic protector in when in the key.

Also I know a ford tech and asked him about this and he told me they send them to a place in scotland to get coded but I already had found someone who said they would do it before he got back to me

Right.... My reciver wires are as follows brown/green. White/green. Black/green and green/black

The end green/black one is slightly thicker than the rest

Can you confirm what goes to where, I have tried as stated in the other thread but still no spark

Thanks

Have you got a complete loom or bits of loom or just the plugs ?

The way I do it is to bench test the immobiliser first.

You need a battery then just connect the ecu earth's one perm live two switched lives via a 1A fuse.

Take one pre wired led and connect the red to the perm live the ecu switches the led earth.

Four wires to the tanceiver.

Can you immobilise the ecu ?

Have you seen my St 170 project thread ?


http://www.locostbuilders.co.uk/viewthread.php?tid=174681

First post has a vid of what I am on about.

I have all of the focus rs loom , but I'm only using the ecu/engine sensor part of it , and that is spliced in to the fiesta loom at the ecu end, basically for power and the few wires the car sees from the ecu.

I will have a look over your thread and see what I can do next , I only had a hour at it this morning to try what I found

Thanks

I have wired in the immobiliser light and it just constantly flashes , can you tell me if the halo round the barrel on the 2005 fiesta is the same as the 2003 focus rs? As it's the fiesta one I'm using

Ok, after looking at the halo plug on the focus loom the plug is diffrent (same as the one in your thread ) I'm now wondering if I will require a halo from a focus of the same year

The one in the vid could have been a mondeo.

Pre and post 1997 wont work with each other I don't know about the fiesta.

I know the fiesta immobiliser system is linked in to the instrument panel, as they are coded to the ecu as well, the wires on the focus halo match the 2 wires on the focus ecu , I will get a halo from a mondeo/focus around 2003 age and see if that fixes it, I'm thinking it's maybe a diffrent way of picking up the signal

Thanks

Ok, I can confirm the halos are not the same from 2003 to 2005, wired the proper focus halo and it went no probs

Big thanks to big-wasa on this subject :-)

Also now you know that codeing a chip is possible :-)

All good then, I know the ecu can be recoded to fresh keys but ford wouldn't like just an ecu with out the car attached

What forum are you on ? I can come and see some progress.

Iv not done a thread on any forum about this mate, car originally started with a blacktop from a mondeo with a turbo bolted to it running low boost, when it was put in to get set up it was blown up :-/.

That's when it was decided to go along the focus rs route

It originally was running fiesta turbo omex with a unichip.

But decided it would be better to just run oem engine management then there would be no hassle with mapping or so on so forth.

I'm waiting on maf sensor and a few other bits and bobs and need to tidy up some wiring but once I have I will post up some photos of it :-)