1991 LEXUS SC400 Service Repair Manual

Page 73 of 4087

LEXUS SC400 1991  Service Repair Manual 
STANDARD VALUE OF ECU TERMINAL (Contd)
AC±34±
AIR CONDITIONING SYSTEM Troubleshooting 
WhereEverybodyKnowsYourName

Page 74 of 4087

LEXUS SC400 1991  Service Repair Manual 
WIRING DIAGRAM
±
AIR CONDITIONING SYSTEM TroubleshootingAC±35 
WhereEverybodyKnowsYourName

Page 75 of 4087

LEXUS SC400 1991  Service Repair Manual 
AC±44AC±46AC±48AC±50AC±52AC±54AC±56AC±58AC±60AC±62AC±64AC±66
MATRIX CHART OF PROBLEM SYMPTOMS
If a normal code is displayed during the diagnostic code check (sensor ch\
eck) but the troub

Page 76 of 4087

LEXUS SC400 1991  Service Repair Manual 
AC±68AC±70AC±72AC±74AC±76AC±78AC±80AC±82AC±84AC±90AC±92AC±96AC±98AC±10
8IN±32AC±100AC±103AC±10
4AC±12
0AC±118AC±122AC±12
5AC±126
HINT:
wIf the instruction ºProceed to next cir

Page 77 of 4087

LEXUS SC400 1991  Service Repair Manual 
LOCATION OF CONNECTORS
LOCATION OF CONNECTORS IN ENGINE COMPARTMENT
AC±38±
AIR CONDITIONING SYSTEM Troubleshooting 
WhereEverybodyKnowsYourName

Page 78 of 4087

LEXUS SC400 1991  Service Repair Manual 
±
AIR CONDITIONING SYSTEM TroubleshootingAC±39 
WhereEverybodyKnowsYourName

Page 79 of 4087

LEXUS SC400 1991  Service Repair Manual 
LOCATION OF CONNECTORS IN INSTRUMENT PANEL
AC±40±
AIR CONDITIONING SYSTEM Troubleshooting 
WhereEverybodyKnowsYourName

Page 80 of 4087

LEXUS SC400 1991  Service Repair Manual 
±
AIR CONDITIONING SYSTEM TroubleshootingAC±41 
WhereEverybodyKnowsYourName