clutch LEXUS GS400 2000 Service User Guide

AC0951
Stator AC±42
± AIR CONDITIONINGCOMPRESSOR AND MAGNETIC CLUTCH
2727 Author: Date:
2000 LEXUS GS300/GS400 (RM718U)
(c) Remove the stator.

AC0WX±01
N04963
Dial Indicator
± AIR CONDITIONINGCOMPRESSOR AND MAGNETIC CLUTCH
AC±43
2728 Author: Date:
2000 LEXUS GS300/GS400 (RM718U)
REASSEMBLY
Reassembly is in the reverse order of disassembly
(See page AC±40).
AFTER REASSEMBLY, CHECK MAGNETIC CLUTCH
CLEARANCE
(a) Set the dial indicator to the pressure plate of the magnetic
clutch.
(b) Connect the magnetic clutch lead wire to the positive (+)
terminal of the battery.
(c) Check the clearance between the pressure plate and ro-
tor when connecting the negative (±) terminal to the bat-
tery.
Standard clearance:
0.5 ± 0.15 mm (0.020 ± 0.0059 in.)
If the clearance is not within the standard clearance, adjust the
clearance using shims to obtain the standard clearance.
Shim thickness:
0.1 mm (0.004 in.)
0.3 mm (0.012 in.)
0.5 mm (0.020in.)

AC0WY±01
AC±44
± AIR CONDITIONINGCOMPRESSOR AND MAGNETIC CLUTCH
2729 Author: Date:
2000 LEXUS GS300/GS400 (RM718U)
INSTALLATION
1. GS400:
INSTALL COMPRESSOR
(a) Install the compressor with the 2 bolts temporarily.
(b) Install the compressor stay with the bolt and nut temporarily.
(c) Tighten the nut and 3 bolts.
Torque:
Bolt: 49 N´m (500 kgf´cm, 36 ft´lbf)
Nut: 29 N´m (300 kgf´cm, 22 ft´lbf)
(d) Connect the connector.
2. GS300:
INSTALL COMPRESSOR
(a) Install the compressor with the stud bolt.
Torque: 52 N´m (530 kgf´cm, 38 ft´lbf)
(b) Install the 3 bolts and nut.
Torque:
Bolt: 52 N´m (530 kgf´cm, 38 ft´lbf)
Nut: 26 N´m (265 kgf´cm, 19 ft´lbf)
(c) Connect the connector.
(d) Install the compressor bracket with the 2 bolts.
Torque: 52 N´m (530 kgf´cm, 38 ft´lbf)
(e) Install the PS pump bracket with the 2 bolts.
Torque: 52 N´m (530 kgf´cm, 38 ft´lbf)
3. GS300:
INSTALL 2 PS PUMP SET BOLTS
Torque: 58 N´m (590 kgf´cm, 43 ft´lbf)
4. GS 300:
CONNECT DISCHARGE AND SUCTION HOSES
Connect the both hoses with the 2 nut.
Torque: 10 N´m (100 kgf´cm, 7 ft´lbf)
NOTICE:
Hose should be connected immediately after the caps have been removed.
HINT:
Lubricate 2 new O±rings with compressor oil and install them to the hoses.
5. GS400:
CONNECT DISCHARGE HOSE
Connect the discharge hose with the nut.
Torque: 10 N´m (100 kgf´cm, 7 ft´lbf)
NOTICE:
Hose should be connected immediately after the cap have been removed.
HINT:
Lubricate a new O±ring with compressor oil and install them to the hose.

± AIR CONDITIONINGCOMPRESSOR AND MAGNETIC CLUTCH
AC±45
2730 Author: Date:
2000 LEXUS GS300/GS400 (RM718U)
6. GS400:
INSTALL SUCTION HOSE
Install the suction hose with the bolt and nut.
Torque: 10 N´m (100 kgf´cm, 7 ft´lbf)
NOTICE:
Hose should be connected immediately after the caps have been removed.
HINT:
Lubricate 2 new O±rings with compressor oil and install them to the hose.
7. INSTALL DRIVE BELT
(See page AC±16)
8. INSPECT DRIVE BELT TENSION
(See page AC±14)
9. INSTALL ENGINE UNDER COVER
10. CONNECT NEGATIVE (±) TERMINAL CABLE TO BATTER
11. EVACUATE AIR FROM REFRIGERATION SYSTEM AND CHARGE SYSTEM WITH REFRIGERANT
Specified amount: 600 ± 50 g (21.16 ± 1.76 oz.)
12. INSPECT FOR LEAKAGE OF REFRIGERANT
Using a gas leak detector, check for leakage of refrigerant.
If there is leakage, check the tightening torque at the joints.
13. INSPECT A/C OPERATION

I03741
2 1
3
4
AC0XN±01
Z13470
Magnetic Clutch Control
Low Pressure Side
ON (Continuity)
181 kpa
(1.85 kgf´cm
2, 28 psi)
OFF (No Continuity)High Pressure Side
3,140 kpa
(32.0 kgf´cm2, 455 psi)
OFF (No Continuity)
Z13471
Cooling Fan Control
ON1,520 kpa
(15.5 kgf´cm
2, 220 psi)
(No Continuity) (Continuity)
OFF
1,230 kpa
(12.5 kgf´cm
2, 178 psi) AC±76
± AIR CONDITIONINGPRESSURE SWITCH
2761 Author: Date:
2000 LEXUS GS300/GS400 (RM718U)
PRESSURE SWITCH
ON±VEHICLE INSPECTION
1. SET ON MANIFOLD GAUGE SET
(See page AC±17)
2. DISCONNECT CONNECTOR FROM PRESSURE
SWITCH
3. RUN ENGINE AT APPROX. 1,500 RPM
4. Magnetic Clutch Control:
INSPECT PRESSURE SWITCH OPERATION
(a) Connect the positive (+) lead from the ohmmeter to termi-
nal 4 and the negative (±) lead to terminal 1.
(b) Check continuity between terminals when refrigerant
pressure is changed, as shown in the illustration.
If operation is not as specified, replace the pressure switch.
5. Cooling Fan Control:
INSPECT PRESSURE SWITCH OPERATION
(a) Connect the positive (+) lead from the ohmmeter to termi-
nal 2 and the negative (±) lead to terminal 3.
(b) Check continuity between terminals when refrigerant
pressure is changed, as shown in the illustration.
If operation is not as specified, replace the pressure switch.
6. STOP ENGINE AND SET OFF MANIFOLD GAUGE SET
7. CONNECT CONNECTOR TO PRESSURE SWITCH

Z19533
32 1
541
43 2
5AC0XQ±01
I050271 2
5
1235
3
N23635
3
2
15
4
± AIR CONDITIONINGRELAY
AC±79
2764 Author: Date:
2000 LEXUS GS300/GS400 (RM718U)
RELAY
INSPECTION
1. INSPECT HEATER MAIN RELAY
(Marking: HTR) CONTINUITY
ConditionTester connectionSpecified condition
Constant2 ± 4
1 ± 3Continuity
Apply B+ between
terminals 1 and 3.5 ± 4Continuity
If continuity is not as specified, replace the relay.
2. INSPECT MAGNETIC CLUTCH RELAY
(Marking: A/C COMP) CONTINUITY
ConditionTester connectionSpecified condition
Constant1 ± 2Continuity
Apply B+ between
terminals 1 and 2.3 ± 5Continuity
If continuity is not as specified, replace the relay.
3. INSPECT No.2 COOLING FAN RELAY
(Marking: FAN NO.2) CONTINUITY
ConditionTester connectionSpecified condition
Constant1 ± 2
3 ± 4Continuity
Apply B+ between
terminals 1 and 2.3 ± 5Continuity
If continuity is not as specified, replace the relay.
4. INSPECT No.3 COOLING FAN RELAY
(Marking: FAN NO.3) CONTINUITY
Check the relay in the same way as for ºMAGNETIC CLUTCH
RELAYº.

AT05W±01
D01264
O/D Brake (B0)
O/D One±way
Clutch (F
0) 3rd Coast Brake (B
1)
Direct Clutch (C
2)
Forward Clutch (C
1)
No.1 One±way Clutch (F
1)
2nd Brake (B
3)
1st & Reverse Brake (B
4)
No.2 One±way Clutch (F
2) 3rd Brake (B
2) O/D Direct Clutch (C
0)
Shift Solenoid Valve No.4Shift Solenoid Valve No.3Shift Solenoid Valve No.1 Shift Solenoid Valve No.2
Shift Solenoid Valve SLT
Shift Solenoid Valve SLU
Shift Solenoid Valve SLN
Park
Reverse
Neutral
1st
2nd
4th
5th
1st
4th
1st
3rd
1st
1stS1 S2 S3 C
0C1C2B0B1B2B3B4F0F1F2
: Operating
Gear
Position Shift Lever
Position
ONOFF
ON ON
ON ON
ON ON ON ON
ON
ON
OFF OFF OFF
OFF
OFF OFF
OFF
OFF
OFF OFF
OFFON
ON ON OFF OFF
ON
ONOFF OFF
ON OFF
OFF OFF OFF ON
OFF OFF
OFF ON 2nd
2nd
2nd3rd 3rd
S4
ON OFF ON
OFF ON ON
ON OFF
OFF
OFF
OFF
OFF
OFF
OFF
OFF
OFF
OFF
OFF
OFF
OFF
OFF
OFF R
N
D
4
3
2
L P
OFFON
OFF
OFFON
OFFOFF
OFF
AT±2
± AUTOMATIC TRANSMISSIONAUTOMATIC TRANSMISSION SYSTEM
1950 Author: Date:
2000 LEXUS GS300/GS400 (RM718U)
OPERATION

AT067±01
D01040

Gasket
Clamp
ClampAir Cleaner, MAF Meter and Intake
Air Connector Pipe Assembly
Exhaust Manifold with TWC
Connector and
Wire Harness Level Gauge
Filler PipeAdjusting WasherPropeller Shaft Assembly
Shift Control Rod
Torque Converter ClutchPlug for Line
Pressure TestHeat Insulator
Heated Oxygen Sensor
Front and Center
Exhaust PipeFront Floor
Center Brace
Engine Under Cover Pipe Support BracketO±Ring Heat Insulator

Gasket
Starterx6x839 (400, 29)
44 (450, 33)
72 (730, 53)
37 (380, 27)
13 (130, 9)
79 (805, 58)
37 (375, 27)
7.4 (75, 65 in.´lbf)
44 (450, 33)
44 (450, 33)
37 (380, 27)
37 (380, 27)
Hole Plug
5.4 (55, 48 in.´lbf)
Oil Cooler Pipe
x5

O±Ring
5.4 (55, 48 in.´lbf)

Gasket
44 (450, 33)


5.4 (55, 48 in.´lbf)
N´m (kgf´cm,ft´lbf) : Specified torque

Non±reusable part
Gasket
48 (490, 35)
26 (270, 20)
44 (450, 33)
44 (450, 33)


79 (805, 58)
± AUTOMATIC TRANSMISSIONAUTOMATIC TRANSMISSION UNIT (2JZ±GE)
AT±27
1975 Author: Date:
2000 LEXUS GS300/GS400 (RM718U)
AUTOMATIC TRANSMISSION UNIT (2JZ±GE)
COMPONENTS

D01047
Q03721
D01048
Q06925
AT±30
± AUTOMATIC TRANSMISSIONAUTOMATIC TRANSMISSION UNIT (2JZ±GE)
1978 Author: Date:
2000 LEXUS GS300/GS400 (RM718U)
12. REMOVE TORQUE CONVERTER CLUTCH MOUNT-
ING BOLT
(a) Remove the hole plug.
(b) Turn the crankshaft to gain access to each bolt.
(c) Hold the crankshaft pulley nut with a wrench and remove
the 6 bolts.
Torque: 48 N´m (490 kgf´cm, 35 ft´lbf)
HINT:
At the time of installation, please refer to the following item.
First install black colored bolt and then the 5 other bolts.
13. SUPPORT TRANSMISSION WITH JACK
14. REMOVE 4 ENGINE REAR MOUNTING SET BOLTS
Torque: 26 N´m (270 kgf´cm, 20 ft´lbf)
15. DISCONNECT CONNECTORS AND WIRE HARNESS
(a) Tilt down the transmission.
NOTICE:
Take care so that the cooling fan does not come in contact
with the fan shroud.
(b) Disconnect the following connectors:
(1) O/D direct clutch speed sensor connector
(2) Vehicle speed sensor connector
(3) Park/neutral position switch connector
(4) Solenoid connector
(c) Disconnect the wire harness from the clamp on the trans-
mission.

AT069±01
Q03794
AT±32
± AUTOMATIC TRANSMISSIONAUTOMATIC TRANSMISSION UNIT (2JZ±GE)
1980 Author: Date:
2000 LEXUS GS300/GS400 (RM718U)
INSTALLATION
1. CHECK TORQUE CONVERTER CLUTCH INSTALLA-
TION
Using calipers and a straight edge, measure from the distance
from the installed surface of the transmission housing to the
installed surface of the torque converter clutch.
Correct distance: More than 0.1 mm (0.004 in.)
If the distance is less than the standard, check for an improper
installation.
2. INSTALL TRANSMISSION
Installation is in the reverse order of removal.
(See page AT±28)
HINT:
After installation, check and inspect items as follows.

Adjust the shift lever position. (See page DI±318)

Fill ATF and check fluid level. (See page DI±318)

Do the road test. (See page DI±318)