Daihatsu 1997 Terios J100 Service Manual page 906

BE–72
When diagnosis code 22 is indicated:
Possible cause for malfunction: Circuit of squib of air bag at driver's seat side is shorted.
NOTE:
·
The squib of the air bag consists of a filament of about 2 ohms. In order to detect open wire or short
circuit in the squib circuit, a small amount of current is flown at all times from the air bag ECU.
Therefore, when this code is indicated, it means that an abnormally large amount of current flowed in
the squib circuit of the air bag at the driver's seat for a certain reason. Therefore, the ECU judges
that the resistor of the squib (filament or wire harness) is shorted.
WARNING:
·
Never measure directly the resistance of the squib to
see if the squib is shorted or not, using a circuit tester.
Failure to observe this warning may cause the air bag
to deploy accidentally, thus causing injuries to the oper-
ators and other people in the surrounding.
1. Check of wiring harness
Ignition SW
4
1 2 3
9 10 11 12
Air bag ECU connector
(at wire harness side)
(1) Turn off the ignition switch and wait for about 60 sec-
onds.
(2) Remove the steering pad assembly (air bag unit) from
the steering wheel.
CAUTION:
·
A steering pad assembly which was dropped previous-
ly can not be used again. Therefore, extreme care
must be exercised not to drop it.
Engine
ACC
fuse
IG No. 1
18 IG1
IG No. 2
17 IG2
ST
Air bag
Main
fuse
10 E1
D+
D–
5 6 7 8
13 14 15 16 17 18
Wire harness connector
(To roll connector)
Air bag ECU
D+ 7
F1
D–
6
G1
+
+
F1
G1
–
–
Roll connector
(To wire harness)
Steering roll
connector
F2 f2
f1
G2 g2
g1
f1 F2
G2
g1
Roll connector
(To driver's
side squib)
JBE00245-05083
JBE00246-05084
Squib
(Driver's
seat side)
+
–
JBE00247-05085
JBE00248-05086