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> Electronic Key Fault, Flat Battery Hasn't Helped
JeremyG
post 18th April 2018 14:16
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1.4 16v
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Driving: 166 3.0 Sportronic, 145 QV
From: Oxford



Just checking something from your original post - you mention the U1600 error code - does that mean you can successfully connect to the engine ECU and read its fault codes?

Reason I ask is, I've just been through a similar process with my twinspark Spider... CODE light on, all fuses, relays, earths etc etc checked out OK... by a process of elimination, the engine ECU had failed.

The clincher here was, I couldn't connect to the engine ECU using MES; and on turning the ignition, the injection/EML light on the dash did NOT light.

The CODE light was coming on because the CODE box could not communicate with the (dead) engine ECU.

A second-hand replacement fixed things instantly (but I needed to replace the ECU, CODE box, ignition lock and all other locks to complete the job).

FYI - the diagnostic step-by-step in the GTV/Spider workshop manual is very helpful here, too. On the assumption that the 145/146 has a similar wiring setup, let me know if you want a copy.
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alfizta
post 22nd April 2018 14:36
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Driving: 146 1.6 T.SPARK CF1
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my 1st suggestion is to check battery is ok. looks like it is new, so that is out.
2nd, take off both black and red battery cables and join both ends together for some seconds. plug them back to battery terminals. check if immobilizer goes off and start the engine.
3rd, if that doesn't cure it, check relays around the battery (front and left side). one is connected to the immobilizer, not sure which, maybe the big black one. remove relays, clean all contacts, try to start the car again.
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leutnant hiltz
post 24th April 2018 19:34
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Hoping magazine article and Jeremy's suggestions will help,just need the time,hoping for May 1st,keep you posted,thanks for pointers,appreciated
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leutnant hiltz
post 25th April 2018 19:35
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1.3 8v
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Local Time: 20th November 2018 14:19
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Driving: 156 jts 145 qv
From: scotland



QUOTE(JeremyG @ 18th April 2018 15:16) *
Just checking something from your original post - you mention the U1600 error code - does that mean you can successfully connect to the engine ECU and read its fault codes?

Reason I ask is, I've just been through a similar process with my twinspark Spider... CODE light on, all fuses, relays, earths etc etc checked out OK... by a process of elimination, the engine ECU had failed.

The clincher here was, I couldn't connect to the engine ECU using MES; and on turning the ignition, the injection/EML light on the dash did NOT light.

The CODE light was coming on because the CODE box could not communicate with the (dead) engine ECU.

A second-hand replacement fixed things instantly (but I needed to replace the ECU, CODE box, ignition lock and all other locks to complete the job).



FYI - the diagnostic step-by-step in the GTV/Spider workshop manual is very helpful here, too. On the assumption that the 145/146 has a similar wiring setup, let me know if you want a copy.



A copy of the relevant pages would be great,my email is jason@hunterayr.co.uk,be weds 2nd when the fun starts,i.e. ready for a garage stint,cheers
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JeremyG
post 25th April 2018 22:07
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Driving: 166 3.0 Sportronic, 145 QV
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QUOTE(leutnant hiltz @ 25th April 2018 20:35) *
A copy of the relevant pages would be great,my email is jason@hunterayr.co.uk,be weds 2nd when the fun starts,i.e. ready for a garage stint,cheers


In fact - the 145 manuals on this site contain the info you need, and specific to our cars:

http://www.alfa145.com/upload/Alfa145Manua...c%20M2.10.4.PDF

This is the guide if you have Motronic 2.10.4 - or 1.5.5 for later cars (also available under the Workshop Manuals section). The diagnostic guidance is at the end of this guide...

This post has been edited by JeremyG: 25th April 2018 22:12
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leutnant hiltz
post 22nd June 2018 14:44
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1.3 8v
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Driving: 156 jts 145 qv
From: scotland



Sorry for delay in update-all good mot'd and back on road,1 of 94 qv's still on road,according to Modern Classics any hoo.
Much head scratching,over everything again and again,hassle with key not picking up code,but eventually got there,then threw a spark plug which required a coil pack and 2 new plugs,oh the joys,but ultimately could always be a lot worse.
Car going great,looking great,post a couple of pics soon,thanks for all help,Forza Alfa !
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