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Discussion Starter · #1 ·
I have a 155 2.0 16V, 1996 and am having a problem with the key code unit. The car's battery went flat and I attempted to start it with jump leads. The code light on the dash came on and stayed on. The local Alfa specialist (not main dealer) suggested pulling the power on the control unit and it would probably revert to normal. He said this is a known problem after flat battery. It didn't work. The Alfa didtributors in Dublin, Fiat, cannot find the over-ride code. They say it is on a card which has got lost! Does anyone know a way around the code, do both the keycode unit and ECU have to be changed or can the keycode unit be changed on its own. Help!!!
 
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Discussion Starter · #2 ·
ive had this problem before when jump starting fiats with code.often they wont start unless you change the battery no mater how well they turn over when jump starting.if you do end up changing the code unit you will need to change the ecu this is because the ecu gets 'burnt' at the factory on first start up and it cannot be changed after that.try a new battery and use the master key to see if that works..there is a emergency start up procedure but i cant remember it with out looking at the code manual.......wrinx any ideas...???
 
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Discussion Starter · #3 ·
Wouldn't replacing the ECU chip with something like a Squadra (but without the alfa code) sort this? then you get to go faster too! wink

Any ideas guys..

Alex
 
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Discussion Starter · #4 ·
Thanks lads, the emergency procedure is to use a code such as 1534, tap this out with the throttle pedal (honest, I'm not making this up) and that allows for emergency start. This code is on a card that supposedly comes with the car, but the insurance co's don't allow Alfa to give it out, and guess what, they don't know what the code is for my car. If I use a Squadra chip, do I not need any code? but I will need 98 RON fuel!

Keep the ideas coming.

Thanks
 

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hi if you look on inside edge of drivers door there might be a sticker with nvsr written on it if you ring them they will not give code but will if alfa dealership requests it they store the engine immobiliser code and key cutting code but not alarm codes they are not allowed to store it . the name of the company has changed but if you ring 192 and ask for nvsr they should give new number hope this helps.
 
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Discussion Starter · #6 ·
This sounds like the ECU has forgotten the key and needs re-memorising, there is a procedure for this which I'm looking at, will post here soon!!!

wrinx
 
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Discussion Starter · #7 ·
Nope, afraid you need the code card! The re-memorisation is just for additional keys and will wipe out the memory of good keys!

How long did you disconnect the battery for, about 15mins is the figure quoted by most people to "re-arm" the ECU.

Sorry cant be more helpful, hope you get it sorted.

wrinx
 

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Can't you reprogram the key into the ECU by using the maroon master key? If the ECU has forgotten all keys, surely it can be pregrammed in again?

Or would I be right in saying you bought the car without the maroon master key....
 
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Discussion Starter · #9 ·
From memory so may not be entirely accurate.....

If you have the maroon master key you should be OK. Put the master key in the lock and turn to marcia", the yellow code light should flash, take out the master and insert your red key and turn to marcia,(I can't remember whether the alfa code light should flash at this point or not), do the same with any more keys you have, then re-insert the master key and turn to marcia, the alfa code light should again flash. All the red keys should now be programmed into the alfa code unit.

Good luck....hope the alarms OK though.....

Simon
 
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Discussion Starter · #10 ·
like i said earlier the ecu has some of its curcuit tracks burnt on first start up you cannot change or reset anything..your only hope is to remove everything from a scrap car as long it has the keys with it.
 
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Discussion Starter · #11 ·
A word of warning though.....do not try using another donor ECU with your keys, it will wipe out the codes!!!

wrinx
 

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Jimybob,

Surely a replacement ECU is not required if PaulC still has the marron key... according to the manual, when the maroon key is used, all keys are forgotten and all keys have to be re-introduced to the system. Paul has nothing to lose by trying this (assuming he has the master key) and would not need a new ECU! I don't even think you need the emergency code for this either...
 
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Discussion Starter · #13 ·
jimmybob, I'm doing this from memory so I may well be wrong- correct me if I am, but I understood that the coding of the ECU is to do with its partnering to the Alfa Code unit- meaning that changing an ECU or Alfa code box individually without changing the other as well is impossible, but reprogramming keys or adding keys is perfectly OK.

Simon
 
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Discussion Starter · #14 ·
spot on simon, our local key cutter can clone your key so even if you dont have the master key you can still get spares(not with keys that have alarm/C.D.L buttons on)paul c hasnt said if a new battery and using the master key has worked or not.
 
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Discussion Starter · #15 ·
Hi I'm new here (1st post) but hope this may help.

Last weekend I disconnected my battery for an overnight charge (155 1.8 8V 1996). The next day I tried to start the car but all I got was a flashing CODE light from the dashboard! After some panic I disabled the alarm/imobiliser (glove box round key) and managed to start the car ok but still had the flashing light.
Anyway drove the car like this for a day (flashing light / no alarm) and realised the battery was still no good and would need replacing. Now I don't know if it was just the new battery it needed or this bit of advise I got from a mate at work, he said: make sure the doors are unlocked and leave the drivers door open when replacing the battery, this apparently tells the alarm system that you haven't just prised open the bonnet!!!
Like I say don't know if that is true or it just needed a new battery BUT afterwards all was well, switched the alarm back on and the code light went out straight away on inserting key.
If I get the courage I might try disconnecting the battery and refitting without doing the above... but then again I might just leave it alone for another 6 years!!!
That was a long first post..... nice to be here... cheers all.
England 1 Argentina 0 :)
 

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WELCOME TO THE " POST ZONE ".
REGARDS
JORGE
 
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Discussion Starter · #18 ·
Key code update
Problem still not solved. Key code unit was faulty according to Alfa/Fiat. Key code unit changed. Code light goes from constant on to flashing. Alfa say this means that keycode unit is working but is not talking to engine ECU which also needs replacement. Sent ECU to a company in Southampton who said that "there was no evidence of any damage to ECU, the chip was running" but would not commit to confirming that the unit was OK. Replacement ECU is about €800/900 (GBP600).
Any further ideas would be welcome. Installing an upgraded chip might not work if there is still a problem with the ECU that is not related to the chip.............Help!!!!!!!!!!!!!
 
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Discussion Starter · #19 ·
This prob seems a silly question...
The batt went flat on 155 2.0 Ts jump started no problem, picked up a new battery but am now scarred to fit it with these stories. Is there a correct way of doing this im guessing it is not as simple as it should be

Please let me know asap as battery really does need changing now

Pete
 
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Discussion Starter · #20 ·
if you connect two small leads to the battery terminals and disconnect the battery keeping the two leads on the battery and on the leads so you dont loose power to the car remove the old battery keeping it connected by the two small leads then put your new one on connect it up then take off the two small leads you wont loose any information not even the radio code...hope that make sense its easy (honest)
 
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