2000 LEXUS GS400 Service Repair Manual

AC0X7±01
± AIR CONDITIONINGHEATER RADIATOR
AC±57
2742 Author: Date:
2000 LEXUS GS300/GS400 (RM718U)
INSTALLATION
Installation is in the reverse order of removal (See page AC±55).

AC0X8±01
AC±58
± AIR CONDITIONINGEXPANSION VALVE
2743 Author: Date:
2000 LEXUS GS300/GS400 (RM718U)
EXPANSION VALVE
ON±VEHICLE INSPECTION
1. CHECK QUANTITY OF GAS DURING REFRIGERATION CYCLE
2. SET ON MANIFOLD GAUGE SET
(See page AC±17)
3. RUN ENGINE
Run the engine at 1,500 rpm for at least 5 minutes.
Then check that the high pressure reading is 1.37 ± 1.57 MPa (14 ± 16 kgf/cm
2, 199 ±228 psi).
4. CHECK EXPANSION VALVE
If the expansion valve is faulty, the low pressure reading will drop to 0 kPa (0 kgf/cm
2, 0 psi).

AC0X9±01
I02404
± AIR CONDITIONINGEXPANSION VALVE
AC±59
2744 Author: Date:
2000 LEXUS GS300/GS400 (RM718U)
REMOVAL
1. DISCHARGE REFRIGERANT FROM REFRIGERATION
SYSTEM
HINT:
At the time of installation, please refer to the following item.
Evacuate air from refrigeration system.
Charge system with refrigerant and inspect for leakage of refrig-
erant.
Specified amount: 600 ± 50 g (21.16 ± 1.76 oz.)
2. REMOVE INSTRUMENT PANEL
(See page BO±91)
3. REMOVE EXPANSION VALVE
(a) Pry out the packings.
HINT:
At the in time of installation, please refer to the following item.
Do not reuse the packing.
(b) Using SST, remove the 4 bolts and separate the expan-
sion valve and tube and accessory.
SST 07110±61050
Torque: 4.1 N´m (42 kgf´cm, 36 in.´lbf)
NOTICE:
Cap the open fittings immediately to keep moisture or dirt
out of the system.
HINT:
At the in time of installation, please refer to the following item.
Lubricate 6 new O±rings with compressor oil and install them
to the tube and valve.

AC0XA±01
AC±60
± AIR CONDITIONINGEXPANSION VALVE
2745 Author: Date:
2000 LEXUS GS300/GS400 (RM718U)
INSTALLATION
Installation is in the reverse order of removal (See page AC±59).

AC0XB±01
I02405
± AIR CONDITIONINGBLOWER MOTOR
AC±61
2746 Author: Date:
2000 LEXUS GS300/GS400 (RM718U)
BLOWER MOTOR
REMOVAL
1. REMOVE No.2 UNDER COVER
(See page BO±91)
2. REMOVE BLOWER MOTOR
(a) Disconnect the connector.
(b) Remove the 3 screws and blower motor.

AC0XC±01
AC±62
± AIR CONDITIONINGBLOWER MOTOR
2747 Author: Date:
2000 LEXUS GS300/GS400 (RM718U)
INSPECTION
INSPECT BLOWER MOTOR CIRCUIT
(See page DI±1126)

AC0XD±01
± AIR CONDITIONINGBLOWER MOTOR
AC±63
2748 Author: Date:
2000 LEXUS GS300/GS400 (RM718U)
INSTALLATION
Installation is in the reverse order of removal (See page AC±61).

AC0XE±01
I02406
I02407
AC±64
± AIR CONDITIONINGBLOWER MOTOR CONTROL RELAY
2749 Author: Date:
2000 LEXUS GS300/GS400 (RM718U)
BLOWER MOTOR CONTROL
RELAY
REMOVAL
1. REMOVE THESE PARTS:
(a) Front door scuff plate RH
(b) Cowl side trim RH
(c) No.2 under cover
(d) Glove compartment door
(e) Glove compartment panel
(See page BO±91)
2. REMOVE AIR DUCT
Remove the 3 screws and duct.
3. DISCONNECT WIRE HARNESS
4. REMOVE BLOWER MOTOR CONTROL RELAY
Remove the screw and blower motor control relay, then discon-
nect the connectors.