Fiat Barchetta cannot connect to air bag ECU

multiecuscan program usage help
shpuncik
Posts: 306
Joined: 19 Oct 2018, 16:43

Re: Fiat Barchetta cannot connect to air bag ECU

Post by shpuncik » 07 Nov 2022, 18:14

possible causes:
- bad cable;
- wrong cable setup, latency time, fake FTDI chip;
- airbag ECU itself is a toast;

old dear
Posts: 11
Joined: 01 Nov 2022, 17:29

Re: Fiat Barchetta cannot connect to air bag ECU

Post by old dear » 07 Nov 2022, 18:48

shpuncik wrote:
07 Nov 2022, 18:14
possible causes:
- bad cable;
- wrong cable setup, latency time, fake FTDI chip;
- airbag ECU itself is a toast;
this is the bit i cannot get my headround if i plug the same set up into the engine ecu 3 pin it all works great without a problem

and i can get the blink codes ok manually from the airbag ECU 3 PIN but it wont connect with the KKL .....

think i need a beer

night all x

old dear
Posts: 11
Joined: 01 Nov 2022, 17:29

Re: Fiat Barchetta cannot connect to air bag ECU

Post by old dear » 09 Nov 2022, 07:19

OK folks the latest....

multiecuscan connects to the engine ECU 3 pin with leads no problem

plug the same set up into the airbag 3 pin , set the multi scan on connect ,press Y and the multiscan will not connect BUT the air bag light goes out for approx 3 seconds then starts to Blink 3 times and the light comes on again permently .....so something must be connecting somewhere.

any ideas folks ?

thanks


(the 3 blinks are coming up in the fiat manual as" Module activation circuit coming into contact with 12 volts " but its only blinking 3 times when the laptop is connected by pressing Y on the multiscan )

shpuncik
Posts: 306
Joined: 19 Oct 2018, 16:43

Re: Fiat Barchetta cannot connect to air bag ECU

Post by shpuncik » 09 Nov 2022, 10:22

parts catalogue shows couple different airbag ECUs and seems like early models didn't use TRW ECU. might be your problem.

old dear
Posts: 11
Joined: 01 Nov 2022, 17:29

Re: Fiat Barchetta cannot connect to air bag ECU

Post by old dear » 09 Nov 2022, 10:32

shpuncik wrote:
09 Nov 2022, 10:22
parts catalogue shows couple different airbag ECUs and seems like early models didn't use TRW ECU. might be your problem.
yes thats a good point i will see if i can find out what ecu is in it ,thanks for your help

s130
Posts: 941
Joined: 20 Jan 2010, 10:07
Location: Wrexham, North Wales

Re: Fiat Barchetta cannot connect to air bag ECU

Post by s130 » 09 Nov 2022, 10:55

If you PM me your VIN I'll look up the part number for your airbag ECU. From that we can probably find the make.
Fiat Strada/Ritmo Abarth 130TC, Barchetta 2005 , 500X Cross Plus

old dear
Posts: 11
Joined: 01 Nov 2022, 17:29

Re: Fiat Barchetta cannot connect to air bag ECU

Post by old dear » 09 Nov 2022, 13:00

s130 wrote:
09 Nov 2022, 10:55
If you PM me your VIN I'll look up the part number for your airbag ECU. From that we can probably find the make.
will do tonight many thanks

s130
Posts: 941
Joined: 20 Jan 2010, 10:07
Location: Wrexham, North Wales

Re: Fiat Barchetta cannot connect to air bag ECU

Post by s130 » 10 Nov 2022, 10:51

Have replied to you directly.

Looks like your Airbag ECU is an early one and pre TRW.
Fiat Strada/Ritmo Abarth 130TC, Barchetta 2005 , 500X Cross Plus

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