1991 LEXUS SC400 Service Repair Manual

Page 3209 of 4087

LEXUS SC400 1991  Service Repair Manual 
OKNG
OKNG
INSPECTION PROCEDURE
HINT: If SRS warning light does not light up, perform the following troublesh\
ooting:
1Check ECU±B fuse.
Go to step 
2Preparation.
P1. Disconnect  battery negative (

Page 3210 of 4087

LEXUS SC400 1991  Service Repair Manual 
OKNG
YESNO
YESNO
4Check SRS warning light circuit.
C
OK
P1. Disconnect center airbag sensor assembly.
2. Connect negative (±) terminal cable to battery.
3. Turn ignition switch ACC or ON.
Measure vo

Page 3211 of 4087

LEXUS SC400 1991  Service Repair Manual 
YESNo
HINT: If diagnostic trouble code 22 is output, perform the following troubles\
hooting:
1Is diagnostic trouble code 22 output again?
C
PClear malfunction.
1. Turn ignition switch LOCK, and wait

Page 3212 of 4087

LEXUS SC400 1991  Service Repair Manual 
DTC31Center Airbag Sensor Assembly Malfunction
CIRCUIT DESCRIPTION
The center airbag sensor assembly consists of center airbag sensor, safing sensors, ignition control and drive
circuit, diagnosis ci

Page 3213 of 4087

LEXUS SC400 1991  Service Repair Manual 
YESNO
INSPECTION PROCEDURE
HINT: When a malfunction code other than code 31 is displayed at the same time, first repair the malfunction
indicated by the malfunction code other than 31.
1Is diagnostic

Page 3214 of 4087

LEXUS SC400 1991  Service Repair Manual 
ASSEMBLY REMOVAL AND
INSTALLATION
COMPONENTS
SA09A±07
±
SUSPENSION AND AXLE REAR DIFFERENTIALSA±81 
WhereEverybodyKnowsYourName

Page 3215 of 4087

LEXUS SC400 1991  Service Repair Manual 
DIFFERENTIAL REMOVAL
SA0S6±05
1.  REMOVE PROPELLER SHAFT(See page  PR±6 or 24)
2.  DRAIN DIFFERENTIAL OIL
3.  DISCONNECT REAR DRIVE SHAFTS
(a)  Place matchmarks on the drive shafts and side gear sh

Page 3216 of 4087

LEXUS SC400 1991  Service Repair Manual 
(e)  Remove the upper mount stopper from the differential carrier.
HINT:
w Same vehicles have the adjusting shim for adjusting the
propeller shaft joint angle installed on top of the upper
mount stop