EWD517U
2003 TOYOTA TACOMA (EWD517U)
157
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.
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.
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.)
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.
Before repairs, remove the airbag sensor if shocks are likely to be applied to the sensor during repairs.
Do not expose the steering wheel pad, front passenger airbag assembly, seat belt pretensioner, center airbag sensor
assembly or front airbag sensor assembly directly to hot air or flames.
Even in cases of a minor collision where the SRS does not deploy, the steering wheel pad, front passenger airbag
assembly, seat belt pretensioner, center airbag sensor assembly and front airbag sensor assembly should be inspected.
Never use SRS parts from another vehicle. When replacing parts, replace them with new parts.
Never disassemble and repair the steering wheel pad, front passenger airbag assembly, seat belt pretensioner, center
airbag sensor assembly or front airbag sensor assembly in order to reuse it.
If the steering wheel pad, front passenger airbag assembly, seat belt pretensioner, center airbag sensor assembly or
front airbag sensor assembly has been dropped, or if there are cracks, dents or other defects in the case, bracket or
connector, replace them with new ones.
Use a volt/ohmmeter with high impedance (10 kΩ/V minimum) for troubleshooting the system’s electrical circuits.
Information labels are attached to the periphery of the SRS components. Follow the instructions on the notices.
After work on the SRS is completed, perform the SRS warning light check.
If the vehicle is equipped with a mobile communication system, refer to the precaution in the IN section of the Repair
Manual.
2003 T OYOTA TACOMA (EWD517U)
158
SRS
B–W
31M
2
3H14 3H16
1G3
3H15
ID IH
613
SPIRAL
CABLE
1
FROM POWER SOURCE SYSTEM
(
SEE PAGE 54
)
DATA LINK CONNECTOR 3
D 7
A/B TC
AIRBAG SQUIB
(
STEERING WHEEL PAD
)
A18
Y–R
YY
Y–B
BR
BR
Y–B
Y
3H18
1
2
W–B W–B
4
PASSENGER AIRBAG MANUAL
ON/OFF INDI CA TOR
P19
P20
PASSENGER AIRBAG
MANUAL ON/OFF SW
B
3G16
3G17
IE
1
1
32
2
B
B6B5B3B19
15A
ECU–IG
7. 5A
IGN
C
C
JUNCTION
CONNECTOR
J11
2121
B26 B15 B20 B9
IF32IF31
B
W–RW–R
BR–W
B–L
FRONT AIRBAG
SENSOR LH
F 9
FRONT AIRBAG
SENSOR RH
F10
27 B28B11 B10 14 B13
P21
PRETENSIONER LH
21
C2C1
P22
PRETENSIONER RH
21
A5A6
L
G
Y–B
Y
Y–B
Y
E1 E2P– P+ D+ D– PL+ PL– PR+ PR–
IG1 IG2 LA TC –SL +SL –SR +SR
A21
AIRBAG SQUIB
(
FRONT PASSENGER
AIRBAG ASSEMBLY
)
CENTER AIRBAG SENSOR ASSEMBLY
B
C20 , C21
AC
, C22
Y–R
(
*2
)
(
*2
)
G–W
(
*2
)
GR
(
*2
)
LG
(
*2
)
G–R
(
*2
)
(
*2
)
B
B
7
SIL
WW
B12
SIL
B–W
Y–R
3H17
3H19
Y
B
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