2000 LEXUS GS400 Service Repair Manual

Z05962
B02027
Turn
B02028
Move
B01995
Type A
A
Type BB
AB
Z05963
CORRECT WRONG WRONG CH±2
± CHARGING (2JZ±GE)CHARGING SYSTEM
1604 Author: Date:
2000 LEXUS GS300/GS400 (RM718U)
5. INSPECT DRIVE BELT
HINT:
A belt tensioner is used, so checking the belt tension is not nec-
essary.
(a) Visually check the drive belt for excessive wear, frayed
cords, etc.
If necessary, replace the drive belt.
HINT:

Cracks on the rib side of a drive belt are considered ac-
ceptable. If the drive belt has chunks missing from the
ribs, it should be replaced.

The drive belt tension can be released by turning the belt
tensioner clockwise.
(b) Check the belt tensioner operation.

Check that the belt tensioner moves downward
when the drive belt is pressed down at the points in-
dicated in the illustration with approx. 98 N (10 kgf,
22.0 lbf) of force.

Check the alignment of the belt tensioner pulley to
make sure the drive belt will not slip off the pulley.
If necessary, replace the belt tensioner.

Check that the arrow mark on the belt tensioner falls
within area A of the scale.
If it is outside area A, replace the drive belt.
HINT:

When a new belt is installed, it should lie within area B. If
not, the drive belt is not correct.

After installing a drive belt, check that it fits properly in the
ribbed grooves.

Check by hand to confirm that the belt has not slipped out
of the groove on the bottom of the pulley.
6. VISUALLY CHECK GENERATOR WIRING AND
LISTEN FOR ABNORMAL NOISES
(a) Check that the wiring is in good condition.
(b) Check that there is no abnormal noise from the generator
while the engine is running.

Z03473
Ammeter
Battery
VoltmeterGenerator Disconnect Wire
from Terminal B
B01656
Terminal F
± CHARGING (2JZ±GE)CHARGING SYSTEM
CH±3
1605 Author: Date:
2000 LEXUS GS300/GS400 (RM718U)
7. CHECK CHARGE WARNING LIGHT CIRCUIT
(a) Warm up the engine and then turn it off.
(b) Turn off all accessories.
(c) Turn the ignition switch ºONº. Check that the charge warn-
ing light is lit.
(d) Start the engine. Check that the light goes off.
If the light does not go off as specified, troubleshoot the charge
light circuit.
8. INSPECT CHARGING CIRCUIT WITHOUT LOAD
HINT:
If a battery/generator tester is available, connect the tester to
the charging circuit as per manufacturer's instructions.
(a) If a tester is not available, connect a voltmeter and amme-
ter to the charging circuit as follows:

Disconnect the wire from terminal B of the genera-
tor, and connect it to the negative (±) probe of the
ammeter.

Connect the positive (+) probe of the ammeter to
terminal B of the generator.

Connect the positive (+) probe of the voltmeter to
terminal B of the generator.

Ground the negative (±) probe of the voltmeter.
(b) Check the charging circuit as follows:
With the engine running from idling to 2,000 rpm, check
the reading on the ammeter and voltmeter.
Standard amperage: 10 A or less
Standard voltage: 13.2 ± 14.8 V
If the voltmeter reading is more than standard voltage, replace
the voltage regulator.
If the voltmeter reading is less than standard voltage, check the
voltage regulator and generator as follows:

With terminal F grounded, start the engine and
check the voltmeter reading of terminal B.

If the voltmeter reading is more than standard volt-
age, replace the voltage regulator.

If the voltmeter reading is less than standard volt-
age, check the generator.
9. INSPECT CHARGING CIRCUIT WITH LOAD
(a) With the engine running at 2,000 rpm, turn on the high
beam headlights and place the heater blower switch at
ºHIº.
(b) Check the reading on the ammeter.
Standard amperage: 30 A or more
If the ammeter reading is less than the standard amperage, re-
pair the generator.
HINT:
If the battery is fully charged, the indication will sometimes be
less than standard amperage.

CH048±01
B01950
P10628
Socket
Wrench
P21010
SST
N00581
SST
P13567
Bearing Cover
± CHARGING (2JZ±GE)GENERATOR
CH±11
1613 Author: Date:
2000 LEXUS GS300/GS400 (RM718U)
REPLACEMENT
1. REPLACE FRONT BEARING
(a) Remove the 4 screws, bearing retainer and bearing.
(b) Using a socket wrench and press, press out the bearing.
(c) Using SST and a press, press in a new bearing.
SST 09950±60010 (09951±00500)
(d) Install the bearing retainer with the 4 screws.
Torque: 3.0 N´m (31 kgf´cm 27 in.´lbf)
2. REPLACE REAR BEARING
(a) Using SST, remove the bearing cover (outside) and bear-
ing.
SST 09820±00021
NOTICE:
Be careful not to damage the fan.
(b) Remove the bearing cover (inside).
(c) Place the bearing cover (inside) on the rotor.

N00578
SST
P00074
SST
Bearing Cover
CH±12
± CHARGING (2JZ±GE)GENERATOR
1614 Author: Date:
2000 LEXUS GS300/GS400 (RM718U)
(d) Using SST and a press, press in a new bearing.
SST 09820±00030
(e) Using SST, push in the bearing cover (outside).
SST 09285±76010

CH049±01
P10639
Pulley
P10637
B02022
29 mm
Socket
Wrench
B01648
Wire
Clip
P10835
Turn
SST (B)SST (A)
± CHARGING (2JZ±GE)GENERATOR
CH±13
1615 Author: Date:
2000 LEXUS GS300/GS400 (RM718U)
REASSEMBLY
1. PLACE DRIVE END FRAME ON PULLEY
2. INSTALL ROTOR TO DRIVE END FRAME
3. INSTALL RECTIFIER END FRAME
(a) Place the generator washer on the rotor.
(b) Using a 29 mm socket wrench and press, slowly press in
the rectifier end frame.
(c) Install the 3 nuts.
Torque: 4.5 N´m (46 kgf´cm, 40 in.´lbf)
(d) Install the wire clip with the nut.
Torque: 5.4 N´m (55 kgf´cm, 48 in.´lbf)
4. INSTALL PULLEY
(a) Install the pulley to the rotor shaft by tightening the pulley
nut by hand.
(b) 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)
(c) Check that SST (A) is secured to the pulley shaft.

Z00045
Turn
SST (C)
P10836
Turn
SST (B)SST (A)
B01649
Inside
Rubber
Insulator
B01650
Push
B01651
Seal Plate CH±14
± CHARGING (2JZ±GE)GENERATOR
1616 Author: Date:
2000 LEXUS GS300/GS400 (RM718U)
(d) Mount SST (C) in a vise.
(e) Insert SST (B) into SST (C), and attach the pulley nut to
SST (C).
(f) To torque the pulley nut, turn SST (A) in the direction
shown in the illustration.
Torque: 110.5 N´m (1,125 kgf´cm, 81 ft´lbf)
(g) Remove the generator from SST (C).
(h) Turn SST (B), and remove SST (A and B).
5. INSTALL RECTIFIER HOLDER
(a) Install the 4 rubber insulators on the lead wires.
(b) Install the rectifier holder while pushing it with the 4
screws.
Torque: 2.9 N´m (30 kgf´cm, 26 in.´lbf)
6. INSTALL VOLTAGE REGULATOR AND BRUSH
HOLDER
(a) Place the seal plate on the rectifier end frame.

B01652
Upward
Long
Long
B01653
B01654
Plate Terminal
± CHARGING (2JZ±GE)GENERATOR
CH±15
1617 Author: Date:
2000 LEXUS GS300/GS400 (RM718U)
(b) Place the voltage regulator and brush holder on the recti-
fier end frame.
NOTICE:
Be careful of the holder installation direction.
(c) Install the 5 screws.
Torque: 2.0 N´m (20 kgf´cm, 18 in.´lbf)
(d) Place the brush holder cover on the brush holder.
7. INSTALL REAR END COVER
(a) Install the end cover and plate terminal with the bolt and
3 nuts.
Torque:
Nut 4.4 N´m (45 kgf´cm, 39 in.´lbf)
Bolt 3.9 N´m (39 kgf´cm, 35 in.´lbf)
(b) Install the terminal insulator with the nut.
Torque: 6.5 N´m (67 kgf´cm, 58 in.´lbf)
8. CHECK THAT ROTOR ROTATES SMOOTHLY

CH04A±01
CH±16
± CHARGING (2JZ±GE)GENERATOR
1618 Author: Date:
2000 LEXUS GS300/GS400 (RM718U)
INSTALLATION
Installation is in the reverse order of removal. (See page CH±6)