Used Vitz 2005 airbag light on

[riztauras]

Was this report taken after the driver airbag replacement?? Looks like this was taken before air-bag replacement coz the B1801 code is current which means that SRS module is not detecting the driver airbag. which essentially means that if the guy replaced the airbag because of the fault, it's still not resolved... in that case your problem may be with the clockspring and not with airbag at all.

The report was taken before replacing the refill (the workshop owner kept calling this thing "refill", below is the picture of this thing taken from internet, it looks like this:)

I think its called clock spring which is replaced, not the airbag so yes you are right its the clockspring which is replaced and problem resolved, the airbag is fine its not replaced

After replacing this clockspring under the horn pad, the light of SRS bag is no more displaying on the dashboard so I assume the problem is resolved, my horn was working before replacing this part because someone before me who was using that car made a quick fix (Jugaar) and just attached the horn wire directly to the relevant wire of horn but not replaced this part, so I guess it is very common problem but the last guy didn't bother to replace the part shown in picture.

but it's definitely cheaper to unplug AC sensor circuit and run car for a while than to jump into the rabbit hole.

can you tell me where is this AC sensor circuit so that I can try unplugging it?

[zakiuddin]

can you tell me where is this AC sensor circuit so that I can try unplugging it?

Correction, it's the Ambient Temp sensor, not the AC temperature sensor. It should be right behind the radiator as shown below.

Disclaimer: I'm not familiar with Vitz at all. This is something i just pulled off the internet..

Ask mechanic to pull it out for you and you can test it yourself.. There should be two pins on the sensor. connect multimeter on resistance settings to both of these pins.
1. It should not be open circuit. If so, replace it,
2. Note the resistance and at various temperatures.. Resistance should be higher at higher Temperatures... Put it in refrigerator and note again. if you find inconsistency anywhere, replace it.

your climate control function won't properly in absence of this sensor but you should be control the AC manually.

On a second thought, are you getting the same engine stop issue after clockspring replacement.?? The clockspring do not directly house a CANBus wire but the SRS module is definitely connected on CANBus.. Maybe the source of problem was Clockspring and not the Temperature sensor.

[riztauras]

On a second thought, are you getting the same engine stop issue after clockspring replacement.?? The clockspring do not directly house a CANBus wire but the SRS module is definitely connected on CANBus.. Maybe the source of problem was Clockspring and not the Temperature sensor.

Actually I am feeling a little better with the engine so far, after replacing this clockspring and as of yet the engine has not stalled at low speed, the issue was very intermittent anyway and was not much bothering me, but I am a kind of guy who wants to keep the car in top class working condition, that is why I was trying to find the source of the problem as it could be damaging to the engine in the long run, what do you think?
Apart from that I will test the car again at low speed if its stalling or not, and get it scanned again.
thanks for your help.

[zakiuddin]

change the ambient sensor regardless as it's not working.