Toyota Camry 1999 Electrical Troubleshooting Manual page 246

SRS
SYSTEM OUTLINE
The SRS is a driver and front passenger protection device which has a supplemental role to the seat belts.
When the ignition SW is turned to ACC or ON, current from the CIG fuse flows to TERMINAL (B) 6 of the center airbag
sensor assembly. Only when the ignition SW is on does the current flow from the IGN fuse to TERMINAL (B) 5 of the center
airbag sensor assembly.
If an accident occurs while driving, when the frontal impact exceeds a set level, current from the CIG or IGN fuse flows to
TERMINALS (B) 14, (B) 10, (A) 2 and (C) 5 of the center airbag sensor assembly to TERMINAL 1 of the airbag squibs and
the pretensioners to TERMINAL 2 to TERMINALS (B) 13, (B) 11, (A) 1 and (C) 6 of the center airbag sensor assembly to
TERMINAL (B) 27, (B) 28 or BODY GROUND to GROUND, so that current flows to the front airbag squibs and the
pretensioners and causes them to operate.
When the side impact also exceeds a set level, current from the CIG or IGN fuse flows to TERMINALS (A) 5, (C) 2, (A) 2 and
(C) 5 of the center airbag sensor assembly to TERMINAL 1 of the side airbag squibs and the pretensioners to TERMINAL 2
to TERMINALS (A) 6, (C) 1, (A) 1 and (C) 6 of the center airbag sensor assembly to TERMINAL (B) 27, (B) 28 or BODY
GROUND to GROUND, causing side airbag squibs and the pretensioners to operate.
The airbag stored inside the steering wheel pad is instantaneously expanded to soften the shock to the driver.
The airbag stored inside the passenger's instrument panel is instantaneously expanded to soften the shock to the front
passenger.
Side airbags are instantaneously expanded to soften the shock of side to the driver and front passenger.
The pretensioners make sure of the seat belt restrainability.
: PARTS LOCATION
Code See Page
A22 30
A23 30
C9 30
C17 A 30
C18 B 30
C19 C 30
26 (1MZ–FE)
D1 D1
28 (5S–FE)
: JUNCTION BLOCK AND WIRE HARNESS CONNECTOR
Code See Page
1G 20
1J
1N
20 20
1V
1W
2J 22
: CONNECTOR JOINING WIRE HARNESS AND WIRE HARNESS
Code See Page
IG2 40
II3 42
IT1 42
IU1 42
BV1 46
BW1 46
: GROUND POINTS
Code See Page
36 (1MZ–FE)
EC EC
38 (5S–FE)
IE 40
IG 40
Code
D4
D5
J3
J7 A
J8 B
J11
J22
J23
Junction Block and Wire Harness (Connector Location)
Instrument Panel Wire and Instrument Panel J/B (Lower Finish Panel)
Cowl Wire and Instrument Panel J/B (Lower Finish Panel) Cowl Wire and Instrument Panel J/B (Lower Finish Panel)
Cowl Wire and Engine Room J/B No.2 (Engine Compartment Left)
Joining Wire Harness and Wire Harness (Connector Location)
Instrument Panel Wire and Cowl Wire (Lower Finish Panel)
Engine Wire and Cowl Wire (Under the Blower Motor)
Cowl Wire and Cowl Wire (Left Kick Panel)
Engine Room Main Wire and Cowl Wire (Right Kick Panel)
Floor Wire and Seat No.1 Wire (Under the Driver's Seat)
Floor No.2 Wire and Seat No.2 Wire (Under the Front Passenger's Seat)
Ground Points Location
Surge Tank RH
Intake Manifold
Cowl Side Panel LH
Instrument Panel Brace LH
See Page
30
30
31
31
31
31
31
31
Code See Page
P24 33
P25 33
S7 33
S8 33
S9 34
S10 34