Lexus SC300 / Lexus SC400. Manual — part 69

Check center airbag sensor assembly.

Connect center airbag sensor assembly connector.

Measure resistance between D

+

, D

–

on center air-

bag sensor assembly side of connector between
center airbag sensor assembly and spiral cable.

Replace center airbag sensor assembly.

From the results of the above inspection, the malfunctioning part can now be considered normal.
To make sure of this, use the simulation method to check.

Resistance: 1 k

or higher

AB–59

SRS

AIRBAG – Troubleshooting

RELEASE METHOD OF AIRBAG ACTIVATION PREVENTION
MECHANISM

An airbag activation prevention mechanism is built into the connector for the squib circuit of the airbag
system. When release of the airbag activation prevention mechanism is directed in the troubleshoot-
ing procedure, as shown in the illustration of the connectors (1) and (2) below, insert paper which is
the same thickness as the male terminal, between the terminal and the short spring.
CAUTION:

•

NEVER RELEASE the airbag activation prevention mechanism on the steering wheel pad
connector.

NOTICE:

•

Do not release the airbag activation prevention mechanism unless specifically directed
by the troubleshooting procedure.

•

If the paper inserted is too thick the terminal and short spring may be damaged, so always
use paper the same thickness as the male terminal.

AB–60

SRS

AIRBAG – Troubleshooting

MEMO

AB–61

SRS

AIRBAG – Troubleshooting

CUSTOMER PROBLEM ANALYSIS

AT09Q–0A

–

A304E (1UZ–FE) AUTOMATIC TRANSMISSION

TROUBLESHOOTING

AT–35