1991 LEXUS SC400 Service Repair Manual

Page 265 of 4087

LEXUS SC400 1991  Service Repair Manual 
(1) Turn ignition switch LOCK.
(2) Disconnect  negative (±) terminal cable frombattery.
(3) Connect  connector to center airbag sensor assembly.
(4) Using a service wire, Connect D
+ and D± on
spir

Page 266 of 4087

LEXUS SC400 1991  Service Repair Manual 
(1) Turn ignition switch LOCK.
(2) Disconnect  battery negative (±) terminal cable,and wait at least 20 seconds.
(3) Connect  steering wheel pad (squib) connector.
(4) Connect  negative (±) termina

Page 267 of 4087

LEXUS SC400 1991  Service Repair Manual 
MEMOAB±53
SRS AIRBAG
   ±   Troubleshooting 
WhereEverybodyKnowsYourName

Page 268 of 4087

LEXUS SC400 1991  Service Repair Manual 
Diag. Code 13Short in Squib Circuit (Between D+ Wire
Harness and D± Wire Harness)
CIRCUIT DESCRIPTION
The squib circuit consists of the center airbag sensor assembly, spiral cable and the steering w

Page 269 of 4087

LEXUS SC400 1991  Service Repair Manual 
DIAGNOSTIC CHART (Contd)
Check spiral cable.Repair or replace spiral cable.
Check harness between center airbag
sensor assembly and spiral cable.Repair or replace harness or
connector between center

Page 270 of 4087

LEXUS SC400 1991  Service Repair Manual 
INSPECTION PROCEDURE
(1) Disconnect  battery negative (±) terminal cable,and wait at least 20 seconds.
(2) Remove steering wheel pad (See page  AB±14).
Preparation.
Measure resistance between D+ an

Page 271 of 4087

LEXUS SC400 1991  Service Repair Manual 
(1) Connect  negative (±) terminal cable to battery.
(2) Clear malfunction code 41 stored in memory(See page  AB±32).
Check center airbag sensor assembly.
Replace center airbag sensor assembly.
(1)

Page 272 of 4087

LEXUS SC400 1991  Service Repair Manual 
(1) Disconnect  connector between center airbagsensor assembly and spiral cable.
(2) Release airbag activation prevention mecha- nism on center airbag sensor assembly side of
spiral cable connector (