Lexus GS300/400 (2000 year). Service manual - part 113

Z05962

B02027

Turn

B02028

Move

B01995

Type A

A

Type B

B

A

B

Z05963

CORRECT

WRONG

WRONG

CH–2

–

CHARGING (2JZ–GE)

CHARGING SYSTEM

1604

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

Voltmeter

Generator

Disconnect Wire
from Terminal B

B01656

Terminal F

–

CHARGING (2JZ–GE)

CHARGING SYSTEM

CH–3

1605

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 ”ON”. 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
”HI”.

(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

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

(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