ECU Issue

Newbie Joined: 25 May 2006 Posts: 14

CHRIS H, I posted this on RSC and was told your the man to ask:

I have a 1992 19 16V and have just bought a used ECU to fit my chip to it. when I opened it up it doesn't look the same a my one in the car. I checked the siemens model number on the web and the one I bought is apparently for models 1993 on.

I need to know if this is going to be a problem before I fit it?

Site Subscriber Joined: 28 Jan 2005 Posts: 3547

DOes it have a C at the end of any of them?

Newbie Joined: 25 May 2006 Posts: 14

the chip itself fits but my issue is whether the actual ECU will work as it is supposively for cars made after mine. could be an immobiliser issue?

Forum Moderator Joined: 18 Feb 2004 Posts: 7432

So answer the question then and we'll tell you.

Newbie Joined: 25 May 2006 Posts: 14

sorry dont understand what C means

Newbie Joined: 25 May 2006 Posts: 14

if you mean model numbers then no, niether do

Retroholic Joined: 23 Dec 2005 Posts: 3315

[img:320:240:bb0fb006d7]http://img142.imageshack.us/img142/9639/26050612413zg.jpg[/img:bb0fb006d7]

i went to get a pic and found this ECU has a D can i chip this 1?

Newbie Joined: 25 May 2006 Posts: 14

Ok I know what you mean now. The 1 i just bought has got a P on it I will check the one in my car shortly

Newbie Joined: 25 May 2006 Posts: 14

ok checked the one in my car and it is the same model number but it has a c on the end.

my 2 ecus

S101715101 C
S101715101 P

Forum Moderator Joined: 02 Mar 2004 Posts: 19978

wicked neos the man for this tbh, he was sad enough to delve into this subject and stufdy it deeply.

Level 6 User Joined: 10 Nov 2005 Posts: 149

dunno if this is useful, but in my ph2, which does not have an original immob (as far as i know), i've used both a C and a D ECU with equal success... the original one is a D, but the C one worked just as fine.. does anyone here know, if the letter is directly relatable to the revision, ie. D is never than C, and so on...

FCS Event Manager Joined: 04 Jan 2005 Posts: 3680

yes the letter is related to the revision.

A being the older and D being the latest revision of course

Level 6 User Joined: 10 Nov 2005 Posts: 149

so D is the latest one available? surprising, since my ph2 is one of the first ph2's out there.. when was production of the 19 16V discontinued? '95? i've heard of ph3 19's (not sure they ever existed in europe), but dont know if there's ph3 16v's as well..

the ph3 has better seats and a rear window brake light, supposedly..

FCS Event Manager Joined: 04 Jan 2005 Posts: 3680

the Ph3 16v only existed in Europe, it had a different dash design and different designed switches.
Thats the main difference in them lol

OK on the ECU front

Revison C is the worst ECU of the bunch, it was very quickly replaced by the D so no surprise at all that your early ph2 has a D in it.

Revison C has the immob built into its electronics inlcuding the plip, so a key fob and reciever from cars fitted with a C ECU will not work on any other 19 unless it was originally fitted with a C ECU.
All the other 19's had the immob built into a seperate box usually housed in the dash under the heater control panel.

Generic aftermarket chips will not work with revision C, the only chips that do work with a revision C are superchip's chips and only if you tell them your ECU is a revision C.

if you want another ECU to work on a car that had revison C originally fitted then the factory fitted immob has to be scrapped.

Newbie Joined: 25 May 2006 Posts: 14

The letter on the ECU i bought is P. I would like to know whether or not i can try the ECU i bought without it naffing up the car. is it just a case of, if it dont work just put the old one back in? or is that gonna cause problems?

FCS Event Manager Joined: 04 Jan 2005 Posts: 3680

try it on the P ECU and yeah if it does not work, u can just swap it back out.
When replacing the C ECU back into the car it needs resetting, do this by having a nice fully charged battery to start with, close all doors, boot and bonnet as there are alarm switches on these points, plip the doors locked and then unplip them.
That should reset the ECU, if it doesnt, the car wont start as the injectors wont be working (thats how the C revison immoblises the car, it turns off the injectors)

I take it the P ECU came from a 16v clio ?

Newbie Joined: 25 May 2006 Posts: 14

i got it from ebay and it was advertised as an 19 16V. as long as i know i cant naff it all up then ill try it.

Also on resetting, my central locking has gone up the swany. the alarm still sets though, this ok?

FCS Event Manager Joined: 04 Jan 2005 Posts: 3680

You should be ok, sit inside the car and 'plip' using the central locking switch on the dash (again making sure the boot, bonnet and doors are all closed whilst u do this)

One thing to look out for, when u fit the chipped ECU, if the idle swings between 1000 and 3000 rpm, it aint gonna work lol

Retroholic Joined: 23 Dec 2005 Posts: 3315

Wicked Neo";p="96157 wrote:

yes the letter is related to the revision.

A being the older and D being the latest revision of course

right D hasnt got the Imo in it then no?

so you can chip it and use a plip and reciver from a ph1 19 and the central locking will still work? or the plip it came with?

FCS Event Manager Joined: 04 Jan 2005 Posts: 3680

A revision D should be fine to 'chip' up with no immob or alarm issues

Again if the car is hunting between 1000 and 3000 rpm on idle, then the mapping is wrong on the chip but i have mainly only found that issue on the Rev C ECU's

with the keyfob plip you always need the matching reciver for them to work

with Rev C ECU's you need the ECU, Reciever and Plip keyfob

Retroholic Joined: 23 Dec 2005 Posts: 3315

umm next question is have you still got those chips?