Hello all,

I'm Anthoon from Netherlands.
I have a seicento 2002.
big ECU.
the original of the 1.1 8v

I have a 1.2 16v engine brava laid in.
with camshaft housing punto mk2 because camshaft sensor
(part number sensor 4655295)

Only I still malfunction P0340 camshaft position sensor !?

tone wheel is different ... signal is obviously wrong.
anyone have a solution?

Now I remember to the sensor etc of a variant of the sensor in the cover where the coil is mounted on ...
sensor 55242637
cover 55181251

and associated gear / tone wheel

engine runs and drives good!


run on 15" abarth punto mk2 wheels 6j ET37 165/45r15

timming 100% right!

i working by the dealer and have the special tools :slayer:

First of, welcome to the forum

I am actually surprised that you can decent running of 1.2 16V with the 4AF ECU. However, be careful, the standard 1.1 maps are way off for the 1.2 16V in this ECU and the autocalibration procecess can only do things until certain limits.

Answering your question - the trouble code probably has to do something with the difference between the original 1.1 cam shaft sensor signal and the one from 1.2 16V. It would take me very very very long to explain the fine details of the problem, however, the short story is that the trigger wheel on 1.1 has three theeth and the ring on the 1.2 16V camshaft has only one (missing I believe) tooth.

Another possibility is the reverse signal - on 1.2 16V the cyl. 1 singal I believe is produced by a missing tooth on the ring, while in 1.1 8V the tooth is there. But of course it also depends on the sensor itself.

Either of the two, or some problem with electrics (wires swapped, etc.).

I know the theet are different.

but that is why I ask if anyone has a solution for that !?

I know that some 1.4 16v has a different cover for the gears. One with a camshaft sensor on the target.



perhaps solves my problems.

I only made the inlet pressure and temperature sensor with a kind spacer.
this sensor is that of the 1.1 8v. and its working fine!
also the knock sensor is the 1.1 8v

throttle a 1.6 16v marea

You would have to change the program in the Ecu for the Cam Sensor to work as the 16v one. This is not really a viable option. Even Woj would have a challenge with that.
Just like a crank sensor, the program expects certain input signals to match set values, like pulse count. As said, you have a totally different trigger wheel setup.


The best solution is to fit a Mk1 16v Ecu and ditch the Cam sensor or go for an after market Ecu like EMU.

cc1 said:

Even Woj would have a challenge with that.

Click to expand...

You think?

The camshaft sensor issue is indeed fixable with ECU program change. Alternatively one can try putting a not-gate on the cam sensor signal and see what that would do.

But, I think the cam sensor is the least of the worries, the 4AF ECU has a good way of recovering from even a missing one. I would be more worried about the base maps and the knock sensor configuration in the ECU, which for the 1.2 16V can give false readings.

I'd also advise the mk1 Punto ECU (IAW 18FD), however, that one also has its perks.

Men thanks for your input.

but ... I just ride 16km = 10mijls from my shop to home

it drives well and is definitely faster!
but of course it runs with the fault in the basic program ...

The knock sensor is original from the 1.1 8v engine and put onto the torque

I want to first try the sensor well ...
I'm going to try the sensor as shown in the photo above.


perhaps another ECU.

does anyone know if there are special programming ecu`s?
EMU? CC1 said what ..?

perhaps important to know I have power steering !!!

With knock it is not about the sensor or the torque (well ok, that too), but the different vibrations and resonance that the 1.2 16V produces and the 1.1 ECU doesn't know about.

If I understand it well, in Seicento the power steering works independent of the ECU, so that should not be a problem. As for the stand alone ECUs you will have to do a bit of homework. cc1 was talking about ECU Master's EMU (brilliant value for money this one) but there are so many others. The downsides are that practically a full rewiring is needed plus they need to be mapped from scratch by somebody that knows his ways.

Too bad you did not show up earlier, I would have helped you with sorting out the 4AF, couple of months back I was playing with it and my turbo serious ways and had everything fresh in my head. Now I don't have time and I am leaving the country

ow ja ik zie Enschede!?

waar ga je wonen? kwa land

IKEA land

Folks around here do not like seeing languages other than English (And I also do not speak it that well myself).

hahahah okè...

sorry for that little bit of Dutch ...

I did not expect a fellow dutchman

tis is my ECU

There is plenty of Dutch around here I am not one though

M1 type, interesting, never seen one before.

have been in contact today with Squadra-tuning.nl

they will look for me or the EPROM has many differences.
because mine runs pretty well ...

then if it is not exchangeable.
then they are going to transfer the software and EPROM from the 1.2 16v ECU to the 1.1 8v ECU
and as if that possibility is ... fine tuning for better performance


.....to be continued

first to the refinisher

What

The 4AF ECU is Flash based and cannot be chipped (in the classic meaning of the word), it has to be reprogrammed through the diagnostics port. So no 1.2 16V EPROM program will match this ECU (and there was no 1.2 16V program on any similar IAW ECU IIRC so that it could be flashed). Neither will the 1.2 16V program (I assume they talk about IAW 18FD) match the 1.1 SPI ECU (IAW 16F). In the latter case you simply would use the complete IAW 18FD ECU and change the loom (SPI one) slightly.

think those guys know it there ...

she still has to provide a little more information

it was a phone conversation!

and I said try ...

well ...

but eventually used the controller from the donor fiat brava.
with brava harness ...

the whole is in now. and finally 100% good running !!

but ... my power steering does not go out!
the wire from ECU to drive power steering control unit ???
* I can after I know not connect to the ECU of the brava !?

anyone have an idea?

if anyone should know which signal to get this thread?

The power stering is disable after you ride after around 60km/h something like that.
Perhaps you can check in this way ?

Road speed sensor signal to dash is Orange/White.

Hi guys,

sorry for the late response.

but after resetting the power steering everything works great!