air condition LEXUS GS400 2000 Service Repair Manual

± PREPARATIONAIR CONDITIONING
PP±101
153 Author: Date:
2000 LEXUS GS300/GS400 (RM718U)
07112±76060Magnetic Clutch Stopper
07114±84010Snap Ring Pliers
07114±84020Snap Ring Pliers
07116±38360Gas Leak Detector Assembly

PP0SO±01
PP±102
± PREPARATIONAIR CONDITIONING
154 Author: Date:
2000 LEXUS GS300/GS400 (RM718U)
RECOMMENDED TOOLS
09044±00020Torx Socket E10 .Compressor (GS300)
09082±00040TOYOTA Electrical Tester.

PP0SQ±01
PP±104
± PREPARATIONAIR CONDITIONING
156 Author: Date:
2000 LEXUS GS300/GS400 (RM718U)
LUBRICANT
ItemCapacityClassification
Compressor oil±ND±OIL 8 or equivalent
When replacing condenser40 cc (1.4 fl. oz.)
When replacing evaporator40 cc (1.4 fl. oz.)

SS0F5±01
SS±66
± SERVICE SPECIFICATIONSAIR CONDITIONING
222 Author: Date:
2000 LEXUS GS300/GS400 (RM718U)
AIR CONDITIONING
SERVICE DATA
Refrigerant volume600 ± 50 g (21.16 ± 1.76 oz.)
Idle±up Speed (GS300) Magnetic clutch not engaged700 ± 50 rpmIdle u S eed (GS300) Magnetic clutch not engaged
Magnetic clutch engaged800 ± 50 rpm
Idle±up Speed (GS400) Magnetic clutch not engaged750 ± 50 rpmIdle u S eed (GS400) Magnetic clutch not engaged
Magnetic clutch engaged800 ± 50 rpm
Magnetic clutch clearance0.5 ± 0.15 mm (0.020 ± 0.0059 in.)

SS0F6±01
± SERVICE SPECIFICATIONSAIR CONDITIONING
SS±67
223 Author: Date:
2000 LEXUS GS300/GS400 (RM718U)
TORQUE SPECIFICATION
Part tightenedN´mkgf´cmft´lbf
Compressor x Discharge hose101007
Compressor x Suction hose101007
Compressor x Engine (GS300) Bolt5253038Com ressor x Engine (GS300) Bolt
Nut2626519
Compressor x Engine (GS400)4950036
PS pump x Engine (GS300)5859043
PS pump bracket x Engine (GS300)5253038
Compressor bracket x PS pump bracket5253038
Stay x Engine (GS400)2930022
Pressure plate x Compressor13.21359
A/C unit x Liquid and suction tube101007
Evaporator x Tube and accessory4.14236 in.´lbf
Expansion valve x Tube and accessory4.14236 in.´lbf
Condenser x Discharge hose101007
Condenser x Liquid tube101007
Pressure switch x Liquid tube101007
ECT switch x Radiator7.47565 in.´lbf
Suction line101007

B09507
B01620
Ohmmeter3 (CL±)
4 (CL+)
1 (M+)
2 (M±)
B01942VCOhmmeter
E2
B01943
VC Ohmmeter
E2
± SFI (2JZ±GE)THROTTLE BODY
SF±33
1499 Author: Date:
2000 LEXUS GS300/GS400 (RM718U)
(2) Turn the A/C switch ON and OFF, and check the idle
speed.
Idle speed (Transmission in neutral):
700 ± 50 rpm (A/C OFF)
750 ± 50 rpm (A/C ON)
NOTICE:
Perform inspection under condition without electrical load.
(3) With engine idling, pinch the air assist hose and
check that engine speed drops, and then returns
back up to idle speed.
If operation is not as specified, check the throttle body, wiring
and ECM.
(f) After checking the above (b) to (e), perform the diving test
and check that there is no sense of incongruity.
3. INSPECT THROTTLE CONTROL MOTOR
(a) Disconnect the throttle control motor connector.
(b) Using an ohmmeter, measure the resistance between ter-
minal 3 (CL±) and 4 (CL+).
Resistance: 4.2 ± 5.2 W at 20°C (68°F)
(c) Using an ohmmeter, measure the resistance between ter-
minal 1 (M+) and 2 (M±).
Resistance: 0.3 ± 100 W at 20°C (68°F)
If the resistance is not as specified, replace the throttle control
motor. (See page SF±37)
(d) Reconnect the throttle control motor connector.
4. INSPECT THROTTLE POSITION SENSOR
(a) Disconnect the throttle position sensor connector.
(b) Using an ohmmeter, measure the resistance between ter-
minals VC and E2.
Resistance: 1.2 ± 3.2 kW at 20°C (68°F)
If the resistance is not as specified, replace the throttle position
sensor. (See page SF±37)
(c) Reconnect the throttle position sensor connector.
5. INSPECT ACCELERATOR PEDAL POSITION SEN-
SOR
(a) Disconnect the accelerator pedal position sensor con-
nector.
(b) Using an ohmmeter, measure the resistance between ter-
minals VC and E2.
Resistance: 1.2 ± 3.2 kW at 20°C (68°F)
If the resistance is not as specified, replace the accelerator ped-
al position sensor. (See page SF±37)

F04512
2JZ±GE:
1UZ±FE:
Vacuum Hose
Vacuum Hose
SR0DI±01
± STEERINGAIR CONTROL VALVE
SR±7
2177 Author: Date:
2000 LEXUS GS300/GS400 (RM718U)
AIR CONTROL VALVE
INSPECTION
1. TURN AIR CONDITIONING SWITCH OFF
2. CHECK IDLE±UP
(a) Start the engine and run it at idle.
(b) Fully turn the steering wheel.
(c) Check that the engine rpm decreases when the vacuum
hose of the air control valve is pinched.
(d) Check that the engine rpm increases when the hose is re-
leased.

H02575
H02574
H02700
H02576
± SUPPLEMENTAL RESTRAINT SYSTEMSRS AIRBAG
RS±3
2234 Author: Date:
2000 LEXUS GS300/GS400 (RM718U)
6. SRS WARNING LIGHT
The SRS warning light is located on the combination meter. It
goes on to alert the driver of trouble in the system when a mal-
function is detected in the airbag sensor assembly. In normal
operation conditions when the ignition switch is turned to the
ACC or ON position, the light goes on for apporx. 6 seconds and
then goes off.
7. AIRBAG SENSOR ASSEMBLY
The airbag sensor assembly is mounted on the floor inside the
lower center finish panel. The airbag sensor assembly consists
of an airbag sensor, safing sensor, diagnosis circuit, ignition
control and drive circuit, etc. It receives signals from the airbag
sensor and judges whether the SRS must be activated or not.
8. FRONT AIRBAG SENSOR
The front airbag sensor is mounted inside each of the front
members. The sensor unit is a mechanical type. When the sen-
sor detects deceleration force above a predetermined limit,
contact is made in the sensor, sending a signal to the airbag
sensor assembly. The sensor cannot be disassembled.
9. SIDE AIRBAG SENSOR ASSEMBLY
The side airbag sensor assembly is mounted in the LH and RH
center pillar. The side airbag sensor assembly consists of a side
airbag sensor, safing sensor, diagnosis circuit, ignition control
and drive circuit, etc. It receives signals from the side airbag
sensors and judges whether the SRS side airbag must be acti-
vated or not.