2000 LEXUS GS400 check oil

I01390
Condition: Insufficient cooling
I01392
Condition: Insufficient cooling
NOTE : These gauge indica-
tions are shown when the
refrigeration system has
been opened and the refrig-
erant charged without vacu-
um purging.
± AIR CONDITIONINGAIR CONDITIONING SYSTEM
AC±7
2692 Author: Date:
2000 LEXUS GS300/GS400 (RM718U)
(6) Refrigerant overcharged or insufficient cooling of
condenser
Symptom seen in
refrigeration systemProbable causeDiagnosisRemedy

Pressure too high on both low
and high pressure sides

No air bubbles seen through the
sight glass even when the engine
rpm is lowered
Unable to develop sufficient per-
formance due to excessive refrig-
eration system

Insufficient cooling of condenser
Excessive refrigerant in
cycle " refrigerant over charged

Condenser cooling " condenser
fins clogged of condenser fan
faulty
(1) Clean condenser
(2) Check condenser fan motor
operation
(3) If (1) and (2) are in normal
state, check amount of refrigerant
Charge proper amount of refriger-
ant
(7) Air present in refrigeration system
Symptom seen in
refrigeration systemProbable causeDiagnosisRemedy

Pressure too high on both low
and high pressure sides

The low pressure piping hot to
touch

Bubbles seen in sight glass
Air entered in refrigeration system

Air present in refrigeration sys-
tem

Insufficient vacuum purging
(1) Check compressor oil to see if
it is dirty or insufficient
(2) Evacuate air and charge new
refrigerant

I02376
GS300:
3
I02375
GS400:
3
± AIR CONDITIONINGCOMPRESSOR AND MAGNETIC CLUTCH
AC±35
2720 Author: Date:
2000 LEXUS GS300/GS400 (RM718U)
5. MAKE THESE VISUAL CHECKS:
(a) Leakage of grease from the clutch bearing.
(b) Signs of oil on the pressure plate or rotor.
6. INSPECT MAGNETIC CLUTCH BEARING FOR NOISE
(a) Start engine.
(b) Check for abnormal noise from the compressor when the
A/C switch is OFF.
If abnormal noise is being emitted, replace the rotor of magnetic
clutch.
7. INSPECT MAGNETIC CLUTCH OPERATION
(a) Disconnect the connector.
(b) Connect the positive (+) lead from the battery to terminal
3 and the negative (±) lead to the body ground.
(c) Check that the magnetic clutch is energized.
If operation is not as specified, replace the magnetic clutch.

± 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

D01012
SST
Q08511
SST
D01009
D01008
AT±4
± AUTOMATIC TRANSMISSIONEXTENSION HOUSING OIL SEAL
1952 Author: Date:
2000 LEXUS GS300/GS400 (RM718U)
6. INSTALL EXTENSION HOUSING REAR OIL SEAL
(a) Coat the lip of a new oil seal with MP grease.
(b) Using SST and a hammer, drive in the oil seal with the lip
facing downward.
SST 09309±37010
Oil seal depth from flat end: 2.0 mm (0.079 in.)
7. INSTALL TRANSMISSION OUTPUT FLANGE
(a) Using SST and a hammer, drive in a new oil seal.
SST 09950±60010 (09951±00350), 09950±70010
(09951±07100)
(b) Install the output flange.
(c) Using a 30 mm deeper socket wrench, install and torque
a new nut.
Torque: 126 N´m (1,280 kgf´cm, 93 ft´lbf)
HINT:
Shift the shift lever to P position.
(d) Using a chisel and hammer, stake the nut.
8. INSTALL PROPELLER SHAFT
(See page PR±10)
9. INSTALL FRONT EXHAUST PIPE AND HEAT INSULA-
TOR
1UZ±FE Engine: (See page EM±120)
2JZ±GE Engine: (See page EM±97)
10. FILL AND CHECK FLUID LEVEL
(See page DI±318)

D00753
D00752
D00912
D01917
Seal Breadth 2 ~ 3 mm (0.08 ~ 0.12 in.)
D00910
ºAº
± AUTOMATIC TRANSMISSIONATF TEMPERATURE SENSOR
AT±7
1955 Author: Date:
2000 LEXUS GS300/GS400 (RM718U)
7. INSTALL OIL STRAINER
(a) Install 3 new gaskets.
(b) Install the oil strainer with the 4 bolts.
Torque: 10 N´m (100 kgf´cm, 7 ft´lbf)
8. INSTALL OIL PAN
(a) Install the 3 magnets in the indications of the oil pan.
(b) Remove any packing material and be careful not to drop
oil on the contacting surfaces of the transmission case
and oil pan.
(c) Apply FIPG to the oil pan.
FIPG:
Part No. 08826 ± 00090, THREE BOND 1281 or
equivalent
(d) Install the oil pan with the 19 bolts.
Torque: 7.4 N´m (75 kgf´cm, 65 in.´lbf)
HINT:
Replace the only ºAº bolt with a new one.
9. INSTALL DRAIN PLUG WITH NEW GASKET
Torque: 20 N´m (205 kgf´cm, 15 ft´lbf)
10. FILL FLUID AND CHECK FLUID
(See page DI±318)

AT05Z±01
D00754
D01741
Spring Check Ball Body AT±8
± AUTOMATIC TRANSMISSIONVALVE BODY ASSEMBLY
1956 Author: Date:
2000 LEXUS GS300/GS400 (RM718U)
VALVE BODY ASSEMBLY
ON±VEHICLE REPAIR
CAUTION:
When working with FIPG material, you must observe the follow-
ing items.

Using a razor blade and gasket scraper, remove all the old
FIPG material from the gasket surfaces.

Thoroughly clean all components to remove all the loose
material.

Clean both sealing surfaces with a non±residue solvent.

Apply FIPG in an approx. 1 mm (0.04 in.) wide bead along
the sealing surface.

Parts must be assembled within 10 minutes of application.
Otherwise, the FIPG material must be removed and reap-
plied.
1. REMOVE DRAIN PLUG WITH GASKET AND DRAIN
AT F
2. REMOVE OIL PAN (See page AT±5)
3. EXAMINE PARTICLES IN PAN (See page AT±5)
4. REMOVE OIL STRAINER (See page AT±5)
5. REMOVE SOLENOID WIRING WITH ATF TEMPERA-
TURE SENSOR (See page AT±5)
6. REMOVE VALVE BODY
Remove the 21 bolts and valve body.
7. REMOVE CHECK BALL BODY AND SPRING
NOTICE:
Do not drop the check ball body and spring.

D00911
Shift Solenoid
Valve SLN
Shift Solenoid
Valve SLTShift Solenoid
Valve S1 Shift Solenoid
Valve S3
Shift Solenoid
Valve SLU
Shift Solenoid Valve S2 Shift Solenoid Valve S4
D01741
Spring Check Ball Body
D00913
Pin
± AUTOMATIC TRANSMISSIONVALVE BODY ASSEMBLY
AT±9
1957 Author: Date:
2000 LEXUS GS300/GS400 (RM718U)
8. REMOVE SOLENOID VALVE
(a) Remove the 3 bolts and shift solenoid valve No.1, No.2
and No.3.
(b) Remove the 2 bolts, oil guide plate, lock plate, shift sole-
noid valve SLN and No.4.
(c) Remove the 6 O±rings from each shift solenoid valve.
(d) Remove the bolt, lock plate and shift solenoid valve SLU
and SLT.
9. INSTALL SOLENOID VALVE
(a) Install the shift solenoid valve SLU and SLT and the lock
plate with the bolt.
Torque: 6.4 N´m (65 kgf´cm, 56 in.´lbf)
(b) Coat 6 new O±rings with ATF.
(c) Install the 6 O±rings to the each solenoid valve.
(d) Install the shift solenoid valve SLN, No.4, lock plate and
oil guide plate with the 2 bolts.
Torque: 10 N´m (100 kgf´cm, 7 ft´lbf)
(e) Install the shift solenoid valve No.1, No.2 and No.3 with
the 3 bolts.
Torque:
Shift solenoid valve No.1 and No.3:
6.4 N´m (65 kgf´cm, 56 in.´lbf)
Shift solenoid valve No.2:
10 N´m (100 kgf´cm, 7 ft´lbf)
10. INSTALL CHECK BALL BODY AND SPRING
11. INSTALL VALVE BODY
(a) Align the groove of the manual valve to pin of the lever.

D00754
A
CB
B
B
B
C
CA
DB
AT±10
± AUTOMATIC TRANSMISSIONVALVE BODY ASSEMBLY
1958 Author: Date:
2000 LEXUS GS300/GS400 (RM718U)
(b) Install the 21 bolts.
Torque: 10 N´m (100 kgf´cm, 7 ft´lbf)
Bolt length:
Bolt A: 23 mm (0.91 in.)
Bolt B: 28 mm (1.10 in.)
Bolt C: 36 mm (1.42 in.)
Bolt D: 55 mm (2.17 in.)
12. INSTALL SOLENOID WIRING WITH ATF TEMPERA-
TURE SENSOR (See page AT±5)
13. INSTALL OIL STRAINER (See page AT±5)
14. INSTALL OIL PAN (See page AT±5)
15. INSTALL DRAIN PLUG WITH NEW GASKET
Torque: 20 N´m (205 kgf´cm, 15 ft´lbf)
16. FILL FLUID AND CHECK FLUID (See page DI±318)