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I was looking for clues as to why the cruise control was not working on my -06 1.9 jts 159 when the following happened:

Right after succesfully connecting an obd reader and firing up the ignition, starting the reading process, all possible fault lights and counters began blinking or light up. That's something i haven't encountered in other cars (maybe a self-diagnostic?) But more concerning was the fact that now the dash lcd was showing messages like ''car protection system failure'' and ''airbag fault''. Well i let the reader do it's job and got the codes and decided to finish it there and not fiddle around with the car anymore.

After reinserting the key and reigniting with shaking hands i noticed to my relief that there were no concerning lights or messages but one: The airbag fault light is now on and does not go away with restarting. The car has had no other issues with the air bag fault light and it clearly was triggered right after the obd read started so the culprit must be the semi-cheap obd reader. (A handheld type, not a pro one but not one of them bluetooth cheapos either.)

Is there reason for serious concern? How is it possible that an obd reader causes such a freak out on the car's systems?? How do i get the light and fault reset?


Help much appreciated. :bow:
Tigs



Ps. If you have a clue about the culprit behind these cruise control-related codes, please share:
P0575 Cruise control system input circuit malfunction
P0571 Cruise Control/Brake Switch A Circuit Malfunction
P0564 Cruise Control Switch Circuit Malfunction
 

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You might find the Airbag resets after a few starts (it checks for sufficient power)
Ok, i hope so. I have a timing chain repair and ever impending transmission repair coming up so i don't have any spare cash to throw away on system configurating or resets by pricy dealerships.

I've found very few cases of OBD reader messing up the electrics from these forums. One seemed to point out the culprit as a certain brand of reader which had a very similar looking device as mine. (so it must be rebranded crap)

All the lights' and meters' flashing during the reading still bothers me. I thought OBD protocol is read only so how could it mess up everything like that. It really startled me, never seen anything like it in other cars. Does anyone have expirience on using obd reader on these cars? Is the flashing behaviour normal with any reader?
 

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As O.E. says, it will reset itself. Mine did, but it took weeks.
It sounds like you have a similar reader to mine with it sending the electrics mental.
I've only used it a few times, and it has allowed me to read codes and left no lasting damage.
 

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As O.E. says, it will reset itself. Mine did, but it took weeks.
It sounds like you have a similar reader to mine with it sending the electrics mental.
I've only used it a few times, and it has allowed me to read codes and left no lasting damage.
Thank you for your reply. A relief to know that this is something to be expected and not to be worried about. Would be interesting to know which factors result in the light resetting, as i have read of timespans ranging from days to weeks. Which kind of device would it take to reset it manually?


Btw.
I used a reader that looked pretty much exactly like this, but with different brand:
Reader

So a word of warning for anyone who stumbles upon this thread: Don't even think about running a OBD scan on your car with an amateur tool!
 

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I second that. I think MES is an excellent tool and a modified ELM cable works faultlessly. When I disconnected my airbag to repaint the steering wheel trim the airbag light came on initially and reset itself after just one restart.
 

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The fault codes are perfectly normal and the fault code reader too.
Check the Airbag fuse under the drivers side fuse box. Even a rusty old fuse can cause the problem.
The airbag fuse shares the brake balance fuse too. I can't remember which fuse number but there is a a diagram.
Only replace the use with a good quality Maplin's car fuse or Alfa Romeo one. Avoid Halfords fuses too because Alfa's eat them for breakfast.
Once done reset the fault codes and viola.
I find Alfa are very fussy with cheap or slightly rustung fuses hence the fault codes and errors on the dash...
I think you reader has worked perfectly. )

Sent from my SM-G925F using Tapatalk
 

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No. I believe in connected faults. The OBD reader started it not a random fuse error.

By the way, Alfa fuse problems are usually connected to moisture in the car. ie. A door trim being removed - door seal ruptured - leaking on to mat - moisture vapour in car - fuse terminals corroding.
 

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Old Engineer there is no harm in checking the fuse 1st? That usually is the 1st place to start.
If you pull out fuse F50 which is the 7.5amp it automatically brings up both the fault codes mentioned being the faulty airbag and brake balance.
I know because I tried it on my 2.4...

Sent from my SM-G925F using Tapatalk
 

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Old Engineer there is no harm in checking the fuse 1st? That usually is the 1st place to start.
If you pull out fuse F50 which is the 7.5amp it automatically brings up both the fault codes mentioned being the faulty airbag and brake balance.
I know because I tried it on my 2.4...

Sent from my SM-G925F using Tapatalk
I meant brake switch not brake balance......Still check the fuses....

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The OP's issue is nowt to do with fuses.
His code reader put the airbag light on, just as mine did.
It'll disappear again after a certain number of start-ups, just as mine did.
I've also had no issues whatsoever with Halfords fuses.
 

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Well I have used Torque Pro for many years without any problems and I use MES without any problems too.
Blown fuses do cause. error codes and they still need to be checked....
Statistically 1% have readers that cause errors if you say so Old Engineer v 99% blown fuses....
)))
How long does it take to check and change a fuse? 3 seconds?

Sent from my SM-G925F using Tapatalk
 

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Well I have used Torque Pro for many years without any problems and I use MES without any problems too.
Blown fuses do cause. error codes and they still need to be checked....
Statistically 1% have readers that cause errors if you say so Old Engineer v 99% blown fuses....
)))
How long does it take to check and change a fuse? 3 seconds?

Sent from my SM-G925F using Tapatalk
I think you know these stats are made up! But the deeper point is not to throw in random guesses when the evidence is available.
 

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I was looking for clues as to why the cruise control was not working on my -06 1.9 jts 159 when the following happened:

Right after succesfully connecting an obd reader and firing up the ignition, starting the reading process, all possible fault lights and counters began blinking or light up. That's something i haven't encountered in other cars (maybe a self-diagnostic?) But more concerning was the fact that now the dash lcd was showing messages like ''car protection system failure'' and ''airbag fault''. Well i let the reader do it's job and got the codes and decided to finish it there and not fiddle around with the car anymore.

After reinserting the key and reigniting with shaking hands i noticed to my relief that there were no concerning lights or messages but one: The airbag fault light is now on and does not go away with restarting. The car has had no other issues with the air bag fault light and it clearly was triggered right after the obd read started so the culprit must be the semi-cheap obd reader. (A handheld type, not a pro one but not one of them bluetooth cheapos either.)

Is there reason for serious concern? How is it possible that an obd reader causes such a freak out on the car's systems?? How do i get the light and fault reset?


Help much appreciated. :bow:
Tigs



Ps. If you have a clue about the culprit behind these cruise control-related codes, please share:
P0575 Cruise control system input circuit malfunction
P0571 Cruise Control/Brake Switch A Circuit Malfunction
P0564 Cruise Control Switch Circuit Malfunction
I believe this issue is caused by the pins of the diag socket used by the code reader and the reader trying various pins to try and establish the protocol used.

MES doesn't cause these issues because it is designed for Fiat/Alfas and also, to access some ecus, you need to use one of the coloured adaptors so that MES can connect to the correct pins for these ecus.

There is no standard for which pins are used for which ecus apart from engine diagnostics, as this was the original reason for the socket being fitted.

So best to use MES for your Alfa, or a Fiat /Alfa one such as a Foxwell 510
 

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Alfa 159 JTDm 2011 Fault Code Reader

Hi

I am looking for an inexpensive fault code reader to determine what is causing my engine management light to be illuminated. I have one that worked with my Alfa 156 but last time I tried it with my 159 it caused problems with the airbag warning light (this has been documented by others on here).

I have seen reference to an MES ............what specifically is that.

Details of a suitable make and model of scanner that will work with my 159 JTDm would be appreciated.
 

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............
Ps. If you have a clue about the culprit behind these cruise control-related codes, please share:
P0575 Cruise control system input circuit malfunction
P0571 Cruise Control/Brake Switch A Circuit Malfunction
P0564 Cruise Control Switch Circuit Malfunction
re the cruise control, it's probably a problem with the switch on the brake pedal or clutch pedal.
sometimes the switch does not make proper contact anymore when pressing brake or clutch pedal.
You can simply remove the switch (it's a bayonet fitting, rotate switch 90 degrees and pull out). You can then pull out the plunger on the switch with some needle nose pliers. Upon replacing the switch, it will self adjust.
 

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Hi

I am looking for an inexpensive fault code reader to determine what is causing my engine management light to be illuminated. I have one that worked with my Alfa 156 but last time I tried it with my 159 it caused problems with the airbag warning light (this has been documented by others on here).

I have seen reference to an MES ............what specifically is that.

Details of a suitable make and model of scanner that will work with my 159 JTDm would be appreciated.
You can download the program direct for £50.00 you then need to buy a Modified 327 ELM cable off eBay, make sure it is the modified type to work with Multiscan - Multiecuscan - Diagnostics software for Italian cars
I’ve tried around 5 cheaper OBD readers & although some do work, you tend to get other faults coming up such as aircon, engine management light etc although they do reset.
 

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Get yourself one of these

https://www.ebay.co.uk/i/301626849586?chn=ps&adgroupid=54713458289&rlsatarget=aud-442231655267:pla-413909070436&abcId=1133936&adtype=pla&merchantid=114923301&poi=&googleloc=1006734&device=m&campaignid=1057753394&crdt=0&ul_ref=https%3A%2F%2Frover.ebay.com%2Frover%2F1%2F710-134428-41853-0%2F2%3Fmpre%3Dhttps%253A%252F%252Fwww.ebay.co.uk%252Fi%252F301626849586%253Fchn%253Dps%26itemid%3D301626849586%26targetid%3D413909070436%26device%3Dm%26adtype%3Dpla%26googleloc%3D1006734%26poi%3D%26campaignid%3D1057753394%26adgroupid%3D54713458289%26rlsatarget%3Daud-442231655267%3Apla-413909070436%26abcId%3D1133936%26merchantid%3D114923301%26gclid%3DCjwKCAjw_47YBRBxEiwAYuKdwxc65a4IN2e7X9Mu3y59aYm2VKx4qn03rfnQYMs1HFf2TlDeI6oRzBoCBWEQAvD_BwE%26srcrot%3D710-134428-41853-0%26rvr_id%3D1539470160078%26rvr_ts%3D88d893981630a9c94881e346ffe6e8ee

Download this

http://www.multiecuscan.net

Get these aswell as some still need the adaptor despite modified elm,cannot remember which one off top of head though.

https://www.ebay.co.uk/i/301231120324?chn=ps&adgroupid=54713418609&rlsatarget=pla-411723801070&abcId=1133926&adtype=pla&merchantid=114923301&poi=&googleloc=1006734&device=m&campaignid=1057752920&crdt=0&ul_ref=http%3A%2F%2Frover.ebay.com%2Frover%2F1%2F710-134428-41853-0%2F2%3Fmpre%3Dhttps%253A%252F%252Fwww.ebay.co.uk%252Fi%252F301231120324%253Fchn%253Dps%26itemid%3D301231120324%26targetid%3D411723801070%26device%3Dm%26adtype%3Dpla%26googleloc%3D1006734%26poi%3D%26campaignid%3D1057752920%26adgroupid%3D54713418609%26rlsatarget%3Dpla-411723801070%26abcId%3D1133926%26merchantid%3D114923301%26gclid%3DCjwKCAjw_47YBRBxEiwAYuKdw9Ucly5FabZDfuzP7LUjplTHBZKIDQlzlP9XwKkfaE1tUqKPwn0mYBoCSBgQAvD_BwE%26srcrot%3D710-134428-41853-0%26rvr_id%3D1539566039377%26rvr_ts%3D88da50ad1630ab1346454149ffe70433

That should set you up to do most things however paying £50 to register allows you to do more with it.
 
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