Hi guys,
i have following problem with air bag.i was in the service for electrical problem and after their work the problem was removed.
But created a new. Flashed the lamp for airbag.I think I have a blown fuse,but do not know where.In the fuse box have not fuse for the air bag .
The old problem was with, a central on the window.
There is a fuse under the center console in a relay that comes off a lead that is attatched to the air bag ecu, also in the same place. Boyh are worth checking .
As said the codes must be cleared first to verify the fault is gone.
What is quite common in my experience is that when you disconnect the battery, often after reconnecting again the airbag light will be lit. The system detects a short circuit or some other disturbance caused by the loss (or sudden rise) of voltage and stores a fault code. If you look at the code it usually says "problem has been solved", but the airbag light is lit until you clear the codes as mentioned above.
mike.foxtrot wrote:What is quite common in my experience is that when you disconnect the battery, often after reconnecting again the airbag light will be lit. The system detects a short circuit or some other disturbance caused by the loss (or sudden rise) of voltage and stores a fault code. If you look at the code it usually says "problem has been solved", but the airbag light is lit until you clear the codes as mentioned above.
I have never experienced that on my 164.
However, disconnecting the instrument cluster and turning on the ignition, will cause the light to go on - and maybe even damage the ECU...
1994 Alfa Romeo 164 Q4 Proteo Rosso
1989 Lancia Thema 8.32 Verde Reflex
2001 AR Spider 3.0 24V Blue Lightning
2015 AR 4C Rosso Competizione
2021 AR Giulia Sprint Anodized Blu
1980 AR Alfetta Blindata Bianco
2003 AR 166 3.2 Grigio
Alfan wrote:I have never experienced that on my 164.
Really? I saw it already twice. Maybe I went too far saying it's common, or my understanding of what's causing it is wrong. Anyway, this was what I experienced, and it happened after reconnecting the battery. In any case, reading out the error code should help.
Alfan wrote:
However, disconnecting the instrument cluster and turning on the ignition, will cause the light to go on - and maybe even damage the ECU...
I dont think so. There is just one cable from the SRS to the dashboard. It supplies the two bulbs AIR and BAG. There is no communication between the bulbs and the SRS module, it can't even suggest if these buls are damaged, or disconnected (or all instrument cluster is no available). Its impossible to damage the SRS module that way.
This is checked. I started the engine of my Super with no dashboard few times, and no problems yet.
Alfan wrote:
However, disconnecting the instrument cluster and turning on the ignition, will cause the light to go on - and maybe even damage the ECU...
I dont think so. There is just one cable from the SRS to the dashboard. It supplies the two bulbs AIR and BAG. There is no communication between the bulbs and the SRS module, it can't even suggest if these buls are damaged, or disconnected (or all instrument cluster is no available). Its impossible to damage the SRS module that way.
This is checked. I started the engine of my Super with no dashboard few times, and no problems yet.
Well, I can only refer to what happened with my Q4. No light on before I did this, afterwards it was on, and the fault code was for the ECU, replacing it fixed it. So I can only suggest to not do this!
1994 Alfa Romeo 164 Q4 Proteo Rosso
1989 Lancia Thema 8.32 Verde Reflex
2001 AR Spider 3.0 24V Blue Lightning
2015 AR 4C Rosso Competizione
2021 AR Giulia Sprint Anodized Blu
1980 AR Alfetta Blindata Bianco
2003 AR 166 3.2 Grigio
Very strange, but with ALFAs everything is possible.
So,maybe you talk about the old SRS module, the bigger one, with the two shock sensors, and I"m talking about the newer version withouth sensors.
Hi! I have an Alfa-tester and modules. It is required to extinguish the "airbag" lamp. Alpha 164Q4 '96 . I use the MA9A module. Right? I can't connect. What am I doing wrong? Please tell me.
Do you have any idea why the airbag light came on? It could be that the ECU is 'out-of-order', so that no connection is possible... Of course, there could be several other possibilities, but I would suggest that you try to get hold of another ECU and test that, because it could actually be the problem and then no diagnostic system will help you.
I had the same situation about 15 years ago (turned on ignition without the instrument cluster in the car - learning the hard way) and the airbag light came on. The garage could not connect to the system, so another ECU went in and problem was gone.
1994 Alfa Romeo 164 Q4 Proteo Rosso
1989 Lancia Thema 8.32 Verde Reflex
2001 AR Spider 3.0 24V Blue Lightning
2015 AR 4C Rosso Competizione
2021 AR Giulia Sprint Anodized Blu
1980 AR Alfetta Blindata Bianco
2003 AR 166 3.2 Grigio
Alfan wrote: Sat Apr 10, 2021 6:35 pm
Do you have any idea why the airbag light came on? It could be that the ECU is 'out-of-order', so that no connection is possible... Of course, there could be several other possibilities, but I would suggest that you try to get hold of another ECU and test that, because it could actually be the problem and then no diagnostic system will help you.
I had the same situation about 15 years ago (turned on ignition without the instrument cluster in the car - learning the hard way) and the airbag light came on. The garage could not connect to the system, so another ECU went in and problem was gone.
Thanks for the answer! I do not know for what reason this lamp became active, I bought my car with this problem.
Hello everybody! I have new questions, I want to deal with the warning lamp airbag. 1) What resistance should the airbag have? 2) What has fallen apart in the steering wheel if the part of the wires that runs through the steering wheel has a short circuit?
I cannot help you with your questions, but since there was a problem with the size of photos on this site, which should now be fixed, maybe you can repost the photos, so it is easier to see the details.
1994 Alfa Romeo 164 Q4 Proteo Rosso
1989 Lancia Thema 8.32 Verde Reflex
2001 AR Spider 3.0 24V Blue Lightning
2015 AR 4C Rosso Competizione
2021 AR Giulia Sprint Anodized Blu
1980 AR Alfetta Blindata Bianco
2003 AR 166 3.2 Grigio
In my Q4 (driver airbag only) it is placed in the center console behind the radio, either above or below the engine ECU, so I suggest you look there for the actual number of the unit.
1994 Alfa Romeo 164 Q4 Proteo Rosso
1989 Lancia Thema 8.32 Verde Reflex
2001 AR Spider 3.0 24V Blue Lightning
2015 AR 4C Rosso Competizione
2021 AR Giulia Sprint Anodized Blu
1980 AR Alfetta Blindata Bianco
2003 AR 166 3.2 Grigio
Alfan wrote: Tue Nov 09, 2021 2:54 pm
In my Q4 (driver airbag only) it is placed in the center console behind the radio, either above or below the engine ECU, so I suggest you look there for the actual number of the unit.
evening friends I have a new airbag control unit the light no longer flashes but remains steadily on .... what can it be? but I have not reset with the alpha tester the error I cannot find an auto electrician who has it !!!
Is it a brand new control unit? If so, the problem must be somewhere else in the system, as I assume that the airbag light was flashing with the old control unit?
The airbag system should be possible to connect to, using the alfa164diagnostics tool viewtopic.php?f=2&t=1108
1994 Alfa Romeo 164 Q4 Proteo Rosso
1989 Lancia Thema 8.32 Verde Reflex
2001 AR Spider 3.0 24V Blue Lightning
2015 AR 4C Rosso Competizione
2021 AR Giulia Sprint Anodized Blu
1980 AR Alfetta Blindata Bianco
2003 AR 166 3.2 Grigio
Flashed the lamp for airbag.I think I have a blown fuse,but do not know where.In the fuse box have not fuse for the air bag .
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