Service Manuals, User Guides, Schematic Diagrams or docs for : . Car Manuals Toyota Sienna 2004-2007 Approved SRM 44 systemci 049srs
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SRS
NOTICE: When inspecting or repairing the SRS, perform service in accordance with the following precautionary instructions
and the procedure, and precautions in the Repair Manual applicable for the 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 more than 90 seconds after the ignition SW 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 deploy.)
D When the negative (-) terminal cable is disconnected from the battery, the memory of the clock and audio system will be
cleared. So before starting work, make a record of the contents in the audio memory system. When work is finished,
reset the audio systems as they were before and adjust the clock. Some vehicles have power tilt steering, power
telescopic steering, power seat and power outside rear view mirror which are all equipped with memory function.
However, it is not possible to make a record of these memory contents. So when the work is finished, it will be
necessary to explain it to your customer, and ask the customer to adjust the features and reset the memory. To avoid
erasing the memory in each system, never use a back-up power supply from outside the vehicle.
D Before repair, remove the airbag sensor if shocks are likely to be applied to the sensor during repair.
D Do not expose the following parts directly to hot air or flame;
D Even in cases of a minor collision where the SRS does not deploy, the following parts should be inspected;
D Never use SRS parts from another vehicle. When replacing parts, replace with new parts.
D For the purpose of reuse, never disassemble and repair the following parts.
D If the following parts have been dropped, or have cracks, dents and other defects in their case, bracket, and connector,
replace with new one.
D Use a volt/ohmmeter with high impedance (10 k/V minimum) for troubleshooting electrical circuits of the system.
D Information labels are attached to the periphery of the SRS components. Follow the instructions of the notice.
D After work on the SRS is completed, check the SRS warning light.
D If the vehicle is equipped with a mobile communication system, refer to the precaution in the IN section of the Repair
Manual.
Steering wheel pad
Front passenger airbag assembly
Side airbag assembly
Curtain shield airbag assembly
Seat belt pretensioner
Center airbag sensor assembly
Front airbag sensor assembly
Side airbag sensor assembly
Rear airbag sensor assembly
253
2005 SIENNA (EWD613U)
SRS
From Power Source System (See Page 58)
B- O B- O
7. 5A 22 1H
IGN
9 1E
C14 C15
Curtain Shield Curtain Shield
S16 S17 Airbag Squib Airbag Squib
Side Airbag Sensor Rear LH Side Airbag Sensor Rear RH Front LH Front RH
CSL+ CSL- VUCL ESCL CSR+ CSR- VUCR ESCR
3 2 4 1 3 2 4 1 1 2 1 2
B- O
W- R
W- R
W- B
B- O
Y- O
Y- O
Y- V
Y- V
(* 1)
(* 1)
(* 1)
(* 1)
(* 1)
(* 1)
(* 1)
(* 1)
(* 1)
(* 1)
(* 1)
(* 1)
W
W
G
R
5 B 15 A 1 A 14 A 13 A 18 C 4 C 19 C 20 C 9 A 10 A 8 C 7 C
IG2 CSL+ CSL- VUCL ESCL CSR+ CSR- VUCR ESCR ICL+ ICL- ICR+ ICR-
A20(A), A21(B), A22(C)
Airbag Sensor Assembly
E1 E2 D- D+ D2+ D2- P+ P- P2+ P2- +SL - SL
27 B 28 B 13 B 14 B 16 B 17 B 10 B 11 B 8 B 7 B 15 B 26 B
W- R
BR
W- B
W- B
Y- GR
Y- O
Y- G
Y- R
Y- B
Y- V
Y- P
2 IC1 1 IC1
Y
1 1E 3 1E
W- R
BR
16 1L 3 1H
2 1 4 3 1 2 3 4 2 1
+SL - SL
W- B
W- B
A24 A23 A7
Airbag Squib Airbag Squib Airbag Sensor
(Steering Wheel Pad) (Front Passenger Airbag Assembly) Front LH
IE IF
254
2005 SIENNA (EWD613U)
B- O B- O
* 1 : w/ Side Airbag
* 2 : w/o Side Airbag
C16 C17
Curtain Shield Airbag Curtain Shield Airbag S15 S19
Squib Rear LH Squib Rear RH Side Airbag Sensor Front RH Side Airbag Squib RH
SSR+ SSR- VUPR ESR
1 2 1 2 3 2 4 1 1 2
Y- G
Y- R
L- Y
(* 1)
(* 1)
(* 1)
(* 1)
(* 1)
(* 1)
(* 1)
(* 1)
(* 1)
(* 1)
GR
LG
G
G
P
L
L
5 A 6 A 12 C 11 C 16 C 13 C 17 C 15 C 5 C 6 C
CL2+ CL2- CR2+ CR2- SSR+ SSR- VUPR ESR SFR+ SFR-
A20(A), A21(B), A22(C)
Airbag Sensor Assembly
+SR - SR PL+ PL- PR+ PR- SSL+ SSL- VUPL ESL SFL+ SFL-
9 B 20 B 8 A 7 A 9 C 10 C (*1) 17 A 20 A 16 A 18 A 12 A 11 A
2 A 1 A 5 C 6 C (*2)
BR- W
B- W
GR- L
LG- B
L- W
Y- G
Y- R
Y- B
Y- B
2 IK2 1 IK2
P- L
(*1)
(*1)
(*1)
(*1)
(*1)
(*1)
Y
Y
BR- W
B- W
2 1 1 2 1 2 3 2 4 1 1 2
+SR - SR SSL+ SSL- VUPL ESL
P44 P45
A8 Pretensioner LH Pretensioner RH S14 S18
Airbag Sensor Front RH Side Airbag Sensor Front LH Side Airbag Squib LH
255
2005 SIENNA (EWD613U)
SRS
B- O
B- O W W
From Power Source System (See Page 58)
56
J18
Junction
Connector
10A
26 HTR
D1
Data Link
Connector 3
28 1L
G- R(* 3)
SIL
G- R(* 4)
7
G- B(* 3)
W
W
G- B(* 4)
28 1K 12 1H R- Y
G- R
G- R
G- B
G- B
(* 3)
(* 4)
(* 3)
(* 4)
V
3 BO1 3 BM1 5 BO1 2 BM1 L- W
10 1E
G- R
G- R
G- B
G- B
7 IN1 2 IN1
(* 3)
(* 4)
(* 3)
(* 4)
W
L- W
V
1 C 2 C (* 1)
V
3 C 10 C (* 2)
V
12 B 1 B 25 B
SIL FSR+ FSR- P- AB PAON
Engine Control Module
A20(A), A21(B), A22(C) 32 1H
Airbag Sensor Assembly 29
MPX2
LBE+ LBE- LSP+ LSP- MPX2 MPX1
19 A 2 A 4 A 3 A (*1) 22 B 24 B 6 1E
MPX1
E5
11 A 6 A 3 A 8 A (*2)
18
R- L
R- L
R- Y
R- L
Connector
89
G- W
G- R
G- Y
G- B
Junction
Connector
90
Junction
J18
J19
119 (* 5)
70 110 (* 6)
L- W
R- Y
R- L
V
4 A 6 A 3 A 5 A (*3) 7 1E
1 B 3 B 2 B 4 B (*4)
A/C Control Assembly
20 B 21 B 40 A (*5)
14 3 A 23 B 24 B 12 A (*6)
A 9(A), A10(B)
MPX1 MPX- ABON ABOF IG (*5)
B 7(B) IG+(*6)
Body ECU
MPX2 MPX+
B18(A), (B) 21 B 2 A
Buckle SW LH
Seat Position Sensor
R- L
V
R- L
256
2005 SIENNA (EWD613U)
B- O
W
* 1 : w/ Side Airbag
* 2 : w/o Side Airbag
* 3 : w/ Power Seat
* 4 : w/o Power Seat
* 5 : Automatic A/C
* 6 : Manual A/C
W- L
B- O
W
19 A 7 A 20 A
J33(A), J34(B)
Junction
Connector
7 B 19 B 8 B
G- R(* 3) W- L
G- R(* 4)
W- L
W- L
B- O
B- O
(* 3)
(* 4)
(* 3)
(* 4)
(* 3)
(* 4)
W
W
G- B(*3)
G- B(*4) 4 BO1 7 BM1 2 BO1 8 BM1 1 BO1 4 BM1
G- R
G- R
W- L
W- L
B- O
B- O
G- B
G- B
(* 4)
(* 3)
(* 4)
(* 3)
(* 3)
(* 4)
(* 3)
(* 4)
(* 3)
(* 4)
W
W
O 3(A), O 4(B)
4 A 8 A 2 A 7 A 1 A Occupant Classification ECU
FSR- FSR+ DIA IG +B
SVC1 SIG1 SGD1 SVC3 SIG3 SGD3 SVC2 SIG2 SGD2 SVC4 SIG4 SGD4
11 B 7 B 1 B 5 B 9 B 3 B 12 B 8 B 2 B 6 B 10 B 4 B
R- W
L- W
G- B
R- B
Y- B
B- Y
LG
G
O
V
P
Y
1 2 3 1 2 3 1 2 3 1 2 3
SVC1 SIG1 SGD1 SVC3 SIG3 SGD3 SVC2 SIG2 SGD2 SVC4 SIG4 SGD4
O5 O7 O6 O8
Occupant Classification Occupant Classification Occupant Classification Occupant Classification
Sensor Front LH Sensor Rear LH Sensor Front RH Sensor Rear RH
V V
R- L R- L
257
2005 SIENNA (EWD613U)
SRS
* 3 : w/ Power Seat From Power Source System (See Page 58)
* 4 : w/o Power Seat
10A 7. 5A
ECU- B GAUGE2
8 2C 25 1H
W- L
24 1C
W- L
7 1L
B- R
W- L
W- L
44 54
34 J19
O 3(A), O 4(B) Junction
Occupant Classification ECU Connector
W- L
12 32
BSW BGND GND
9 A 5 A 3 A
SRS
W- B
W- B
(* 3)
(* 4)
R
L
6 BO1 6 BM1
W- B
W- B
(* 3)
(* 4)
2 1
28 29 30 C10
Combination Meter
R- L
V
B17
Buckle SW
(Front Passenger' s Side)
Connector
32 33
BR
Junction
J19
62 13
R- L
V
W- B
W- B
(* 3)
(* 4)
V
R- L
BI IF
258
2005 SIENNA (EWD613U)
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 ON, the current from the IGN fuse flows 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 IGN fuse flows to
TERMINALS (B) 14, (B) 16, (B) 10, (B) 8, (A) 8 (w/ side airbag) or (A) 2 (w/o side airbag) and (C) 9 (w/ side airbag) or (C) 5
(w/o side airbag) of the airbag sensor assembly to the airbag squibs and the pretensioners to TERMINALS (B) 13, (B) 17,
(B) 11, (B) 7, (A) 7 (w/ side airbag) or (A) 1 (w/o side airbag) and (C) 10 (w/ side airbag) or (C) 6 (w/o side airbag) of the
airbag sensor assembly to TERMINAL (B) 27, (B) 28 or BODY GROUND to GROUND, so that current flows to the airbag
squibs and the pretensioners and causes them to operate.
When the side impact also exceeds a set level, the current from the IGN fuse flows to TERMINALS (A) 12, (C) 5, (A) 9, (C) 8,
(A) 5 and (C) 12 of the airbag sensor assembly to the side airbag squibs and the curtain shield airbag squibs TERMINALS
(A) 11, (C) 6, (A) 10, (C) 7, (A) 6 and (C) 11 of the airbag sensor assembly to TERMINAL (B) 27, (B) 28 or BODY GROUND
to GROUND, causing side airbag squibs and curtain shield 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 curtain shield airbag can ease an impact on the head of the front and rear passengers and reduce risks of injury.
The pretensioners make sure of the driver and front passenger seat belt restrainability.
Occupant detection system recognizes not only whether a passenger is in the seat but also whether the passenger is an
adult or a child. According to this information, the airbag sensor assembly controls the airbag deployment and the operation
mode (ON/OFF) indicator of the passenger airbag.
: Parts Location
Code See Page Code See Page Code See Page
A7 32 C15 35 O6 43 (*2)
A8 32 C16 38 42 (*1)
O7
A9 A 34 C17 38 43 (*2)
A10 B 34 D1 35 42 (*1)
O8
A20 A 34 E5 35 43 (*2)
A21 B 34 J18 36 P44 39
A22 C 34 J19 36 P45 39
A23 34 J33 A 36 S14 40
A24 34 J34 B 36 S15 40
B7 B 34 42 (*1) S16 40
O3 A
42 (*1) 43 (*2) S17 40
B17
43 (*2) 42 (*1) 42 (*1)
O4 B S18
A 42 (*1) 43 (*2) 43 (*2)
B18
B 43 (*2) 42 (*1) 42 (*1)
O5 S19
C10 35 43 (*2) 43 (*2)
C14 35 O6 42 (*1)
: Junction Block and Wire Harness Connector
Code See Page Junction Block and Wire Harness (Connector Location)
1C 27 Engine Room Main Wire and Driver Side J/B (Lower Finish Panel)
1E 27
1H 26
Instrument Panel Wire and Driver Side J/B (Lower Finish Panel)
1K
27
1L
2C 22 Engine Room Main Wire and Engine Room J/B (Engine Compartment Left)
* 1 : w/ Power Seat * 2 : w/o Power Seat
259
2005 SIENNA (EWD613U)
SRS
: Connector Joining Wire Harness and Wire Harness
Code See Page Joining Wire Harness and Wire Harness (Connector Location)
IC1 46 Engine Room Main Wire and Instrument Panel Wire (Near the Driver Side J/B)
IK2 48 Engine Room Main Wire and Instrument Panel Wire (Right Kick Panel)
IN1 48 Instrument Panel Wire and Instrument Panel Wire (Behind the Combination Meter)
BM1 54 (*2) Floor No.2 Wire and Seat No.1 Wire (Under the Front Passenger's Seat)
BO1 54 (*1) Seat No.1 Wire and Floor No.2 Wire (Under the Front Passenger's Seat)
: Ground Points
Code See Page Ground Points Location
IE 46 Left Kick Panel
IF 46 Instrument Panel Brace LH
BI 50 Under the Right Center Pillar
* 1 : w/ Power Seat * 2 : w/o Power Seat
260
2005 SIENNA (EWD613U)
Memo
261
2005 SIENNA (EWD613U)
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