Toyota EWD517U User Manual

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 TOYOTA TACOMA (EWD517U)

157

SRS

FROM POWER SOURCE SYSTEM (SEE PAGE 54

15A
ECU–IG

1G3

Y–R

3H17

3H18

Y–R

3H19

)
*2

(

Y–R

31M

B–W

B–W

7. 5A
IGN

)

YY

3H14 3H16

3H15

D 7
DATA LINK CONNECTOR 3

A/B TC

613

Y

SIL

7

WW

B

B

Y–B

C

C

Y–B

J11
JUNCTION
CONNECTOR

F 9
FRONT AIRBAG
SENSOR LH

B

IF32IF31

B

2121

W–RW–R

F10
FRONT AIRBAG
SENSOR RH

BR–W

Y

B–L

B6B5B3B19

IG1 IG2 LA TC –SL +SL –SR +SR

C20 , C21

CENTER AIRBAG SENSOR ASSEMBLY

E1 E2P– P+ D+ D– PL+ PL– PR+ PR–

B

)
*2

GR

(

G–W

1

PASSENGER AIRBAG MANUAL

ON/OFF INDI CA TOR

P19

2

)
*2

(

3G16

3G17

)
*2

(

W–B W–B

4

1

32

)
*2

LG

(

G–R

2

A21
AIRBAG SQUIB

(

FRONT PASSENGER

AIRBAG ASSEMBLY

1

27 B28B11 B10 14 B13

)
*2

(

P20

PASSENGER AIRBAG

MANUAL ON/OFF SW

)
*2

(

BR

)

B12

SIL

, C22

B

AC

B

L

1

BR

A18
AIRBAG SQUIB

(

STEERING WHEEL PAD

SPIRAL
CABLE

G

2

B26 B15 B20 B9

C2C1

Y–B

P21
PRETENSIONER LH

)

Y

21

A5A6

Y–B

P22
PRETENSIONER RH

Y

21

158

IE

ID IH

2003 T OYOTA TACOMA (EWD517U)