Toyota COROLLA2004, Electrical Wiring Diagram

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2004 COROLLA (EWD533U)
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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 ON, current from the MAIN fuse flows to AM2 fuse to ignition SW (IG2) to TERMINAL (B) 5
of the airbag sensor assembly.
If an accident occurs while driving, when the frontal impact exceeds a set level, the current from the TERMINAL (B) 5 of the
airbag sensor assembly flows to TERMINALS (B) 14, (B) 16, (B) 10, (B) 8, (A) 2 and (C) 5 of the airbag sensor assembly to
the airbag squibs and the pretensioners to TERMINALS (B) 13, (B) 17, (B) 11, (B) 7, (A) 1 and (C) 6 of the airbag sensor
assembly to TERMINAL (B) 20, (B) 27 or BODY GROUND to GROUND, so that the current flows to the front airbag squibs
and the pretensioners, and causes them to operate.
When the side impact also exceeds a set level, the current from the TERMINAL (B) 5 of the airbag sensor assembly flows to
TERMINALS (A) 6 and (C) 1 of the airbag sensor assembly to the side airbag squibs to TERMINALS (A) 5 and (C) 2 of the
airbag sensor assembly to TERMINAL (B) 20, (B) 27 or BODY GROUND to GROUND, causing side airbag squibs 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 Code See Page Code See Page
A5 32 B6 34 J7 35
A6 32 B7 34 P12 37
A12 A 34 C9 34 P13 37
A13 B 34 D1 34 S6 35
A14 C 34 E6 34 S7 35
A15 34 I10 35 S10 37
A16 34 J6 35 S11 37
: Relay Blocks
Code See Page Relay Blocks (Relay Block Location)
1 22 Engine Room R/B (Engine Compartment Left)
: Junction Block and Wire Harness Connector
Code See Page Junction Block and Wire Harness (Connector Location)
IC 25 Engine Room Main Wire and Instrument Panel J/B (Lower Finish Panel)
IF
IG
IH
25
II
Instrument Panel Wire and Instrument Panel J/B (Lower Finish Panel)
IJ
Instrument Panel Wire and Instrument Panel J/B (Lower Finish Panel)
IK
IL 24
IM
1A 22 Engine Wire and Engine Room J/B (Engine Compartment Left)
3A
28 Instrument Panel Wire and RH J/B (Right Side of the Instrument Panel Reinforcement)
3B
28 Instrument Panel Wire and RH J/B (Right Side of the Instrument Panel Reinforcement)
4B
30 Instrument Panel Wire and Center J/B (Behind the Combination Meter)
4C
30 Instrument Panel Wire and Center J/B (Behind the Combination Meter)
: Connector Joining Wire Harness and Wire Harness
Code See Page Joining Wire Harness and Wire Harness (Connector Location)
IA1
40 Engine Room Main Wire and Instrument Panel Wire (Left Side of the Instrument Panel Reinforcement)
IA4
40 Engine Room Main Wire and Instrument Panel Wire (Left Side of the Instrument Panel Reinforcement)
IG1 42 Instrument Panel Wire and Instrument Panel No.3 Wire (Front Side of the Parking Brake Lever)
System Outline