1991 LEXUS SC400 Service Repair Manual

Page 3009 of 4087

LEXUS SC400 1991  Service Repair Manual 
9.  INSTALL SELF±LOCKING NUTUsing SST to hold the control valve shaft, install a new self±
locking nut.
SST 09616±00010
Torque: 39 N Vm (400 kgf Vcm, 29 ft Vlbf)
10.  INSTALL RACK HOUSING CAP
(a)

Page 3010 of 4087

LEXUS SC400 1991  Service Repair Manual 
(f)  Using SST and a torque meter, tighten the rack guide springcap until the preload is within specification.
SST 09612±24014 (09612±10022)
09616±00010
Preload (turning):
0.9±1.9 N Vm (9±20 kgf

Page 3011 of 4087

LEXUS SC400 1991  Service Repair Manual 
16.  INSTALL RACK BOOTS, CLAMPS AND CLIPS
(a)  Ensure that the tube hole is not clogged with grease.HINT: If the tube hole is clogged, the pressure inside the boot
will change after it is assembled a

Page 3012 of 4087

LEXUS SC400 1991  Service Repair Manual 
ELECTRONIC CONTROL SYSTEM
PRECAUTION
SR0GR±01
Do not open the cover or the case of the ECU and various computers unless \
absolutely necessary.
(If the IC terminals are touched, the IC may be destro

Page 3013 of 4087

LEXUS SC400 1991  Service Repair Manual 
TROUBLESHOOTING FLOW±CHART
SR0GT±04
Trouble
Hard steering at idle or low±speed driving.
 Steering too sensitive during high±speed driving.
Preliminary Check
Check tire pressure.
 Check lubric

Page 3014 of 4087

LEXUS SC400 1991  Service Repair Manual 
BE±136).
±
STEERING POWER STEERINGSR±165 
WhereEverybodyKnowsYourName

Page 3015 of 4087

LEXUS SC400 1991  Service Repair Manual 
SR±166±
STEERING POWER STEERING 
WhereEverybodyKnowsYourName

Page 3016 of 4087

LEXUS SC400 1991  Service Repair Manual 
ELECTRONIC CONTROL COMPONENTS
INSPECTION
SOLENOID VALVE
SR0GU±01
1.  DISCONNECT WIRING CONNECTOR
2. MEASURE RESISTANCEMeasure the resistance between SOL   and SOL  .
Resistance:
6.0±11.0  
3.  C