Toyota 2004 CELICA Electric Troubleshooting Manual page 151

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 on does, current from the SRS-IG fuse flows to TERMINAL (A) 6.
If an accident occurs while driving, deceleration caused by a frontal impact is detected by each of the sensor and the switch,
in the center airbag sensor assembly and when the frontal impact exceeds a set level (When the safing sensor built into the
center airbag sensor assembly is on and the center airbag sensor is on, the front airbag sensor are off), current from the
SRS-IG fuse flows to TERMINALS (A) 14, (A) 10 of the center airbag sensor assembly to TERMINAL 1 of the airbag squib
to TERMINAL 2 to TERMINALS (A) 13, (A) 11 of the center airbag sensor assembly to TERMINAL (A) 27, TERMINAL (A) 28
or BODY GROUND to GROUND.
When the safing sensor built into the center airbag sensor assembly is on and the front airbag sensor LH or RH is on, the
center airbag sensor is off and current from the SRS-IG fuse flows to TERMINALS (A) 14, (A) 10 of the center airbag sensor
assembly to TERMINAL 1 of the airbag squib to TERMINAL 2 to TERMINALS (A) 13, (A) 11 of the center airbag sensor
assembly to TERMINAL (A) 9 or (A) 15 to TERMINAL 2 of the front airbag sensor to TERMINAL 1 to TERMINAL (A) 20 or
(A) 26 of the center airbag sensor assembly to TERMINAL 27, TERMINAL 28 or BODY GROUND to GROUND, when the
safing sensor built into the center airbag sensor assembly is on, and the front airbag sensor LH or RH is on and the center
airbag sensor is on, one of the above-mentioned circuits is activated so that current flows to the airbag squibs, causing it to
operate.
The airbag stored inside the steering wheel pad is instantaneously expanded to soften the shock to the driver.
Simultaneously, the airbag stored inside the passenger's instrument panel is instantaneously expanded to soften the shock
to the passenger.
: PARTS LOCATION
Code
A12 36
A13 36
B7 36
C6 A 36
C7 B 36
C8 C 36
C12 36
D1 36
: JUNCTION BLOCK AND WIRE HARNESS CONNECTOR
Code See Page
IB
25 25
IC
IF
IH
II
25
IK
IM
2A 23
2F 23
: CONNECTOR JOINING WIRE HARNESS AND WIRE HARNESS
Code See Page
IA3 44
IE2 44
IG1 46
IH3 46
: GROUND POINTS
Code See Page
IF 44
152
See Page Code
D7
D8
E3
E9
F1 F1
F2 F2
Junction Block and Wire Harness (Connector Location)
Engine Room Main Wire and Instrument Panel J/B (Instrument Panel Brace RH) Engine Room Main Wire and Instrument Panel J/B (Instrument Panel Brace RH)
Instrument Panel Wire and Instrument Panel J/B (Instrument Panel Brace RH)
Engine Wire and Engine Room J/B (Engine Compartment Left)
Engine Room Main Wire and Engine Room J/B (Engine Compartment Left)
Joining Wire Harness and Wire Harness (Connector Location)
Front Door LH Wire and Instrument Panel Wire (Left Kick Panel)
Engine Room Main Wire and Instrument Panel Wire (Instrument Panel Brace LH)
Engine Room No.2 Wire and Instrument Panel Wire (Right Kick Panel)
Front Door RH Wire and Instrument Panel Wire (Right Kick Panel)
Ground Points Location
Instrument Panel Brace RH
See Page
38
38
B 32 (1ZZ-FE)
F 34 (2ZZ-GE)
32 (1ZZ-FE)
34 (2ZZ-GE)
32 (1ZZ-FE)
34 (2ZZ-GE)
(
2004 CELICA (EWD538U)
Code See Page
I10 37
J6 37
P9 39
P10 39
S4 37
S5 37
S9 39
S10 39
)