Self-Diagnosis For Airbag System I; Function Of The Airbag System - Skoda FABIA 2000 Workshop Manual

FABIA 2000 Body Work
01-5 Self-diagnosis for Airbag
System I

Function of the airbag system

The airbag System comprises:
♦
Airbag control unit
♦
Sensors for side impact
♦
Driver airbag
♦
Front passenger airbag
♦
Driver and front passenger side airbags
♦
Belt tensioners for driver and front passenger
♦
Key switch for the front passenger seat airbag (special
accessory for vehicles of model year 03)
Depending on the vehicle equipment and control unit
used ⇒ 01-5 page 5 the vehicles may be fitted with:
♦
electronically activated belt tensioners
♦
mechanically activated belt tensioners
If programmed values are exceeded the airbag CU
-J234- activates the release of the airbag units and belt
tensioners.
The operation of the airbag units can be activated or
blocked via the self-diagnosis ⇒ Chapter 01-7.
The switching on and off operations are undertaken by
means of the key switch for the front passenger airbag if
the vehicle is fitted with such a key switch.
If the airbag units on the front passenger side are deacti-
vated, faults relating to airbag deactivation are stored in
the fault memory and, after the airbag units are subse-
quently re-activated, the faults are automatically erased
from the fault memory (only for vehicles which do not
have a key switch for the front passenger airbags).
When igniting the driver and front passenger front airbags
with belt tensioners the fault „crash data stored" is en-
tered in the fault memory and the control unit must be re-
placed with a new original part.
If the control unit detects a side impact it ignites the side
airbag unit and the belt tensioner on the impact side. The
fault „crash data side airbag DS stored" or „crash data
side airbag FPS stored" is entered in the fault memory.
These data can be erased 3x at the most, after which the
control unit must be replaced with a new original part.
If the vehicle is equipped with mechanical belt tensioners,
these belt tensioners are ignited independently of the sig-
nal from the airbag CU -J234-.
Code the new CU when it is first put into service ⇒ 01-5
page 8.
1)
Inspected by self-diagnosis; ignited by the airbag control unit -J234-.
2)
Not inspected by self-diagnosis; ignited independently of the airbag control unit -J234-.
Edition 01.05
S00.5319.15.20
1)
2)

Self-diagnosis for Airbag System I

01
01-5
1
page