LEXUS SC400 1991 Service Workshop Manual

LEXUS SC400 1991 Service Workshop Manual SC400 1991 LEXUS LEXUS https://www.carmanualsonline.info/img/36/57051/w960_57051-0.png LEXUS SC400 1991 Service Workshop Manual
Trending: wheel bolts, wiring, engine overheat, headlight aiming, wire diagram, low oil pressure, automatic transmission fluid

Page 51 of 4087

LEXUS SC400 1991  Service Workshop Manual 
Blower Fan Speed Control System
(When AUTO Switch is ON)
(a)  The desired temperature is set using the TEMP switch.
(b)  From the input signals (room temperature sensor, ambient temperature sensor an

Page 52 of 4087

LEXUS SC400 1991  Service Workshop Manual 
Air Flow Mode Control System
(When the AUTO Switch is ON)
(a)  The desired temperature is set using the TEMP switch.
(b)  From the input signals (room temperature sensor, ambient temperature sensor a

Page 53 of 4087

LEXUS SC400 1991  Service Workshop Manual 
Air Inlet Control System
(When the AUTO Switch is ON)
(a)  The desired temperature is set using the TEMP switch.
(b)  From the input signals (room temperature sensor, ambient temperature sensor and s

Page 54 of 4087

LEXUS SC400 1991  Service Workshop Manual 
Part No.Part NameNote
07110-58011
(07117-58010)
(07117-78011)
(07117-88013)
(07117-88022)
(07117-88040)
07110-58040
07112-66040
07112-76060
07114-82020
07117-48050
Air Conditioner
Service Tool Set
(R

Page 55 of 4087

LEXUS SC400 1991  Service Workshop Manual 
EQUIPMENT
 Part Name\
 \
Note
 

Voltmeter\
 


Page 56 of 4087

LEXUS SC400 1991  Service Workshop Manual 
USE OF MANIFOLD GAUGE SET
INSTALLATION OF MANIFOLD GAUGE
SET
HINT: To prevent releasing refrigerant, use charging hoses
with a stop valve when installing the manifold gauge set to
service valves on t

Page 57 of 4087

LEXUS SC400 1991  Service Workshop Manual 
RECOVERING OF REFRIGERANT IN
REFRIGERANT SYSTEM
When discharging refrigerant from the system as follows, use
a recovery machine to recover the refrigerant.Before replacing parts on the refrigerant li

Page 58 of 4087

LEXUS SC400 1991  Service Workshop Manual 
EVACUATING AIR IN
REFRIGERATION SYSTEM AND
CHARGING WITH REFRIGERANT
HINT: Before charging the system with refrigerant, be sure
carry out a complete evacuation of the system.
1.  INSTALL MANIFOLD GAU

Page 59 of 4087

LEXUS SC400 1991  Service Workshop Manual 
4.  INSPECT REFRIGERATION SYSTEM FOR LEAKSHINT: After evacuating the air in system, check the system for
leakage.
(a)  Open the high pressure hand valve to charge the system with refrigerant.
(b) Whe

Page 60 of 4087

LEXUS SC400 1991  Service Workshop Manual 
6.  CHARGE PARTIALLY REFRIGERATION SYSTEM WITHREFRIGERANT (VAPOR)
HINT: This step is used to charge the system through the low
pressure side with refrigerant in a vapor state.
NOTICE: Do not open the
Trending: engine coolant, service indicator, wiper blades, open hood, fuse diagram, torque, transmission oil