2000 LEXUS GS400 Service Repair Manual

CH044±01
B01996
Generator Wire
Pipe Clamp
A/T Oil Cooler PipePipe BracketGenerator Connector
Generator
Engine Under Cover
x 18
Drive Belt CH±4
± CHARGING (2JZ±GE)GENERATOR
1606 Author: Date:
2000 LEXUS GS300/GS400 (RM718U)
GENERATOR
COMPONENTS

B01642
Pulley
Rotor
Rectifier End FrameDrive End Frame (Stator)Bearing Cover
(Inside)
Generator
Washer
Brush Holder Cover Bearing Retainer
Terminal Insulator
Seal Plate
Rubber InsulatorRear End CoverPlate Terminal
Bearing Cover
Rectifier HolderBrush Holder

Rear Bearing

Front Bearing
Wire Clip
Voltage Regulator

Non±reusable part
± CHARGING (2JZ±GE)GENERATOR
CH±5
1607 Author: Date:
2000 LEXUS GS300/GS400 (RM718U)

CH045±01
B02027
Turn
B01646
B01962
Engine
Wire Clamp
Pipe Clamp
B01963
Pipe Bracket
CH±6
± CHARGING (2JZ±GE)GENERATOR
1608 Author: Date:
2000 LEXUS GS300/GS400 (RM718U)
REMOVAL
1. REMOVE ENGINE UNDER COVER
2. REMOVE DRIVE BELT
Loosen the belt tension by turning the drive belt tensioner clock-
wise, and remove the drive belt.
NOTICE:
At the time of installation, please refer to the following
items. Do an on±vehicle inspection. (See page CH±1)
3. REMOVE GENERATOR
(a) Disconnect the generator connector.
(b) Remove the rubber cap and nut, and disconnect the gen-
erator wire.
(c) Disconnect the engine wire clamp from the wire clip on the
generator.
(d) Remove the bolt and pipe clamp, and disconnect the 2
A/T oil cooler pipes from the generator.
(e) Remove the bolt, nut, pipe bracket and generator.
Torque: 40 N´m (400 kgf´cm, 30 ft´lbf)

B01655
CH046±05
B01654
Plate Terminal
B01997
B01650
P10835
Turn
SST (B)SST (A)
± CHARGING (2JZ±GE)GENERATOR
CH±7
1609 Author: Date:
2000 LEXUS GS300/GS400 (RM718U)
DISASSEMBLY
1. REMOVE REAR END COVER
(a) Remove the nut and terminal insulator.
(b) Remove the bolt, 3 nuts, plate terminal and end cover.
2. REMOVE BRUSH HOLDER AND VOLTAGE REGULA-
TOR
(a) Remove the brush holder cover from the brush holder.
(b) Remove the 5 screws, brush holder and voltage regulator.
(c) Remove the seal plate from the rectifier end frame.
3. REMOVE RECTIFIER HOLDER
(a) Remove the 4 screws and rectifier holder.
(b) Remove the 4 rubber insulators.
4. REMOVE PULLEY
(a) Hold SST (A) with a torque wrench, and tighten SST (B)
clockwise to the specified torque.
SST 09820±63010
Torque: 39 N´m (400 kgf´cm, 29 ft´lbf)
(b) Check that SST (A) is secured to the rotor shaft.

Z00040
SST (C)
Turn
P10836
SST (B)SST (A) Turn
B01648
Wire
Clip
B02021
SST
CH±8
± CHARGING (2JZ±GE)GENERATOR
1610 Author: Date:
2000 LEXUS GS300/GS400 (RM718U)
(c) Mount SST (C) in a vise.
(d) Insert SST (B) into SST (C), and attach the pulley nut to
SST (C).
(e) To loosen the pulley nut, turn SST (A) in the direction
shown in the illustration.
NOTICE:
To prevent damage to the rotor shaft, do not loosen the
pulley nut more than one±half of a turn.
(f) Remove the generator from SST (C).
(g) Turn SST (B), and remove SST (A and B).
(h) Remove the pulley nut and pulley.
5. REMOVE RECTIFIER END FRAME
(a) Remove the 4 nuts and wire clip.
(b) Using SST, remove the rectifier end frame.
SST 09950±40011 (09951±04020, 09952±04010,
09953±04030, 09954±04010, 09955±04041)
(c) Remove the generator washer.
6. REMOVE ROTOR FROM DRIVE END FRAME

CH047±01
B03131
Ohmmeter
Continuity
B03132
Ohmmeter
No Continuity
CH1023
B01948
Continuity
Ohmmeter
B01949
Ohmmeter No Continuity
± CHARGING (2JZ±GE)GENERATOR
CH±9
1611 Author: Date:
2000 LEXUS GS300/GS400 (RM718U)
INSPECTION
1. INSPECT ROTOR
(a) Check rotor for open circuit.
Using an ohmmeter, check that there is continuity be-
tween the slip rings.
Standard resistance: 2.2 ± 2.4 W at 20°C (68°F)
If there is no continuity, replace the rotor.
(b) Check the rotor for ground.
Using an ohmmeter, check that there is no continuity be-
tween the slip ring and rotor.
If there is continuity, replace the rotor.
(c) Check that the slip rings are not rough or scored.
If rough or scored, replace the rotor.
(d) Using vernier calipers, measure the slip ring diameter.
Standard diameter: 14.2 ± 14.4 mm (0.559 ± 0.567 in.)
Minimum diameter: 12.8 mm (0.504 in.)
If the diameter is less than minimum, replace the rotor.
2. INSPECT STATOR (DRIVE END FRAME)
(a) Check the stator for open circuit.
Using an ohmmeter, check that there is continuity be-
tween the coil leads.
If there is no continuity, replace the drive end frame assembly.
(b) Check the stator for ground.
Using an ohmmeter, check that there is no continuity be-
tween the coil lead and drive end frame.
If there is continuity, replace the drive end frame assembly.

P13535
Length
B01954
Ohmmeter
Positive (+)
Terminal
Rectifier
Terminal
B01933
Ohmmeter
Negative (±) Terminal
CH±10
± CHARGING (2JZ±GE)GENERATOR
1612 Author: Date:
2000 LEXUS GS300/GS400 (RM718U)
3. INSPECT BRUSHES
Using vernier calipers, measure the exposed brush length.
Standard exposed length:
9.5 ± 11.5 mm (0.374 ± 0.453 in.)
Minimum exposed length: 1.5 mm (0.059 in.)
If the exposed length is less than minimum, replace the brush
holder assembly.
4. INSPECT RECTIFIERS (RECTIFIER HOLDER)
(a) Check the positive (+) rectifier.
(1) Using an ohmmeter, connect one tester prob to the
positive (+) terminal and the other to each rectifier
terminal.
(2) Reverse the polarity of the tester probes and repeat
step (a).
(3) Check that one shows continuity and the other
shows no continuity.
If continuity is not as specified, replace the rectifier holder.
(b) Check the negative (±) rectifier.
(1) Using an ohmmeter, connect one tester probe to
each negative (±) terminal and the other to each
rectifier terminal.
(2) Reverse the polarity of the tester probes and repeat
step (a).
(3) Check that one shows continuity and the other
shows no continuity.
If continuity is not as specified, replace the rectifier holder.
5. INSPECT BEARING
Check the bearing is not rough or worn.
If necessary, replace the bearing. (See page CH±11)

CO09W±03
± COOLING (2JZ±GE)COOLANT
CO±1
1539 Author: Date:
2000 LEXUS GS300/GS400 (RM718U)
COOLANT
INSPECTION
1. CHECK ENGINE COOLANT LEVEL AT RESERVOIR
The engine coolant level should be between the ºLOWº and ºFULLº lines, when the engine is cold.
If low, check for leaks and add ºToyota Long Life Coolantº or equivalent up to the ºFULLº line.
2. CHECK ENGINE COOLANT QUALITY
There should not be any excessive deposits of rust or scale around the radiator cap or radiator filler hole,
and the coolant should be free from oil.
If excessively dirty, replace the coolant.