Service Manuals, User Guides, Schematic Diagrams or docs for : . Car Manuals Toyota Sienna 1998-2003 Approved FSM 22 systemci 047srs
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SRS
NOTICE: When inspecting or repairing the SRS, perform the operation in accordance with the following precautionary
instructions and the procedure and precautions in the Repair Manual for the applicable model year.
D Malfunction symptoms of the SRS are difficult to confirm, so the DTCs become the most important source of information
when troubleshooting. When troubleshooting the SRS, always inspect the DTCs before disconnecting the battery.
D Work must be started after 90 seconds from when the ignition switch is turned to the "LOCK" position and the
negative (-) terminal cable is disconnected from the battery.
(The SRS is equipped with a back-up power source so that if work is started within 90 seconds from
disconnecting the negative (-) terminal cable of the battery, the SRS may be deployed.)
D When the negative (-) terminal cable is disconnected from the battery, the memory of the clock and audio system will be
canceled. So before starting work, make a record of the contents memorized in the audio memory system. When work is
finished, reset the audio systems as they were before and adjust the clock. To avoid erasing the memory in each
memory system, never use a back-up power supply from outside the vehicle.
D Before repairs, remove the airbag sensor if shocks are likely to be applied to the sensor during repairs.
D Do not expose the steering wheel pad, front passenger airbag assembly, side airbag assembly seat belt pretensioner,
center airbag sensor assembly, front airbag sensor or side airbag sensor directly to hot air or flames.
D Even in cases of a minor collision where the SRS does not deploy, the steering wheel pad, front passenger airbag
assembly, side airbag assembly, seat belt pretensioner, center airbag sensor assembly, front airbag sensor and side
airbag sensor should be inspected.
D Never use SRS parts from another vehicle. When replacing parts, replace them with new parts.
D Never disassemble and repair the steering wheel pad, front passenger airbag assembly, side airbag assembly, seat belt
pretensioner, center airbag sensor assembly, front airbag sensor or side airbag sensor in order to reuse it.
D If the steering wheel pad, front passenger airbag assembly, side airbag assembly, seat belt pretensioner, center airbag
sensor assembly, front airbag sensor or side airbag sensor has been dropped, or if there are cracks, dents or other
defects in the case, bracket or connector, replace them with new ones.
D Use a volt/ohmmeter with high impedance (10 k/V minimum) for troubleshooting the system's electrical circuits.
D Information labels are attached to the periphery of the SRS components. Follow the instructions on the notices.
D After work on the SRS is completed, perform the SRS warning light check.
D If the vehicle is equipped with a mobile communication system, refer to the precaution in the IN section of the Repair
Manual.
2001 SIENNA (EWD420U)
191
SRS
FROM POWER SOURCE SYSTEM (SEE PAGE 52)
D1 D3
DATA LINK DATA LINK P14
5A 15A 10A CONNECTOR 1 CONNECTOR 3 PRETENSIONER LH
IGN CIG ECU- B
AB TC TC SIL
4 1N 2 1N 7 2J 5 11 13 7 1 2
W- R
B- Y
P- B
P- B
R
CONNECTOR
JUNCTION
F
21 IH2 18 IH2
J8
F
W- R
P- B
7 SRS WARNING LIGHT
[COMB. METER]
B- O
GR
I2
Y- B
Y
8
C9
B- Y
P- B
R
B- Y
E E F B
E J6 F B
JUNCTION
B- Y
P- B
CONNECTOR
R
5 A 6 A 3 A 19 A 12 A 2 B 1 B
IG2 ACC LA TC SIL PL+ PL-
C4 B , C5 A , C6 C
CENTER AIRBAG SENSOR ASSEMBLY
SL- SL+ SR- SR+ D+ D- P+ P- E1 E2
26 A 15 A 20 A 9 A 14 A 13 A 10 A 11 A 27 A 28 A
BR- W
B- W
W- B
W- B
Y- G
Y- R
Y- B
Y
W- R
1 IK6 2 IK6
BR
W- B
BR- W
B- W
3 1N 3 1V 7 1J 1 1N
1 2 1 2 1 2
CONNECTION CONNECTION
DETECTION DETECTION SPIRAL
PIN PIN CABLE 4 1V 8 1J
A B A B
1 2
W- B
W- B
A14 A13
F1 F2 AIRBAG SQUIB AIRBAG SQUIB
FRONT AIRBAG SENSOR FRONT AIRBAG SENSOR (STEERING (FRONT PASSENGER
LH RH WHEEL PAD) AIRBAG ASSEMBLY)
IG IJ
2001 SIENNA (EWD420U)
192
P15
PRETENSIONER RH
1 2
S27
S25 SIDE AIRBAG
SIDE AIRBAG SENSOR LH SQUIB LH
R- W
1 2 3 4 2 1
Y- B
Y
CONNECTOR
B
Y- G
Y- R
JUNCTION
GR- L
LG- B
J21
L- W
P- L
B
2 BJ1 1 BJ1 1 BH1
R- W
R- W
Y- G
Y- R
5 C 6 C 7 B 10 B 12 B 9 B 5 B 6 B 11 B 7 BG2
PR+ PR- VUPL SSL+ SSL- ESL SFL- SFL+ LBE+
P
R- W
C4 B , C5 A , C6 C
CENTER AIRBAG SENSOR ASSEMBLY
[SEAT BELT OCCUPANT
7
DETECTION SENSOR]
VUPR SSR+ SSR- ESR SFR+ SFR- GSW2 RBE+ 1
BUCKLE SW LH
12 C 9 C 7 C 10 C 1 C 2 C 23 A 8 C
BUCKLE SW RH
Y- G
Y- R
P
B17
2
S16
3
1 BK1 2 BK1 1 BI1
L- Y
GR
LG
P
B
W- B
W- B
Y- G
Y- R
P
CONNECTOR
1 2 3 4 1 2 12 A C 6 II2 3 BG2
JUNCTION
F/PS
J23
W- B
C
J3 B
S26 S28
P
E8 A
SIDE AIRBAG SENSOR RH SIDE AIRBAG B A
CONNECTOR
SQUIB RH ENGINE CONTROL
JUNCTION
MODULE
J2 A ,
W- B
B B
W- B
ED BK
2001 SIENNA (EWD420U)
193
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 (A) 6 of the center airbag
sensor assembly. Only when the ignition SW is on does the current flow from the IGN fuse to TERMINAL (A) 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 (A) 14, (A) 10, (B) 2 and (C) 5 of the center airbag sensor assembly to TERMINALS 1 of the airbag squibs and
the pretensioners to TERMINALS 2 to TERMINALS (A) 13, (A) 11, (B) 1 and (C) 6 of the center airbag sensor assembly to
TERMINAL (A) 27, (A) 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 (B) 5, (C) 2, (B) 2 and
(C) 5 of the center airbag sensor assembly to TERMINALS 1 of the side airbag squibs and the pretensioners to TERMINALS
2 to TERMINALS (B) 6, (C) 1, (B) 1 and (C) 6 of the center airbag sensor assembly to TERMINAL (A) 27, (A) 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 Code See Page Code See Page
A13 34 E8 A 34 P14 37
A14 34 F1 32 P15 37
B17 38 F2 32 S16 38
C4 B 34 J2 A 35 S25 37
C5 A 34 J3 B 35 S26 37
C6 C 34 J6 35 S27 38
C9 34 J8 35 S28 38
D1 32 J21 36
D3 34 J23 36
,,,
,,, : JUNCTION BLOCK AND WIRE HARNESS CONNECTOR
,,,
Code See Page Junction Block and Wire Harness (Connector Location)
1J
1N 22 Cowl Wire and Driver Side J/B No.1 (Lower Finish Panel)
( )
1V
2J 24 Cowl Wire and Engine Room J/B No.2 (Engine Compartment Left)
: CONNECTOR JOINING WIRE HARNESS AND WIRE HARNESS
Code See Page Joining Wire Harness and Wire Harness (Connector Location)
IH2 44 Engine Wire and Cowl Wire (Front Side of the Blower Motor)
II2 44 Floor No.2 Wire and Cowl Wire (Right Kick Panel)
IK6 44 Engine Room Main Wire and Cowl Wire (Right Cowl Side Panel)
BG2 48 Floor Wire and Seat Wire (Beneath the Driver Seat)
BH1 46 Floor No.3 Wire and Floor Wire (Under the Left Center Pillar)
BJ1 48 Floor No.3 Wire and Seat Wire (Beneath the Driver Seat)
BK1 48 Floor No.3 Wire and Seat No.2 Wire (Beneath the Front Passenger's Seat)
: GROUND POINTS
Code See Page Ground Points Location
ED 40 Near the Left Front Suspension Support
IG 42 Left Cowl Side Panel
IJ 42 Right Cowl Side Panel
BK 46 Under the Left Center Pillar
2001 SIENNA (EWD420U)
194
: SPLICE POINTS
Code See Page Wire Harness with Splice Points Code See Page Wire Harness with Splice Points
I2 44 Cowl Wire
2001 SIENNA (EWD420U)
195
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