Lexus ES300 (1997 year). Service manual — part 294

Z03473

Ammeter

Disconnect Wire
from Terminal B

Battery

Voltmeter

B

Generator

P14228

Terminal F

CH–4

–

CHARGING

CHARGING SYSTEM

1008

1997 LEXUS ES300 (RM511U)

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 (–) tester probe
of the ammeter.

Connect the positive (+) tester probe of the amme-
ter to terminal B of the generator.

Connect the positive (+) tester probe of the voltme-
ter to terminal B of the generator.

Ground the negative (–) tester probe of the voltme-
ter.

(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.

CH015–01

S05218

Pivot Bolt

Plate Washer

Adjusting Lock Bolt

Adjusting Bolt

Generator

Generator Wire

Generator Connector

Drive Belt

S05077

Pulley

Drive End Flame (Stator)

Front Bearing

Retainer

Rotor

Bearing Cover

Rear Bearing

Bearing Cover

Generator Washer

Rectifire End Flame

Cord Clip

Seal Plate

Robber Insulator x 4

Rectifire Holder

Terminal Insulator

Voltage Regulator

Brush Holder

Brush Holder Cover

Rear End Cover

Plate Terminal

Non–reusable part

–

CHARGING

GENERATOR

CH–5

1009

1997 LEXUS ES300 (RM511U)

GENERATOR

COMPONENTS

CH016–01

P14226

Pivot Bolt

Adjusting Bolt

Adjusting
Lock Bolt

P14227

CH–6

–

CHARGING

GENERATOR

1010

1997 LEXUS ES300 (RM511U)

REMOVAL

1.

REMOVE DRIVE BELT

Loosen the pivot bolt, adjusting lock bolt and adjusting bolt, and
remove the drive belt.

Torque:
Pivot bolt: 56 N·m (570 kgf·cm, 41 ft·lbf)
Lock bolt: 18 N·m (180 kgf·cm, 13 ft·lbf)

2.

REMOVE GENERATOR

(a)

Disconnect the generator connector.

(b)

Remove the nut, and disconnect the generator wire.

(c)

Disconnect the wire harness from the clip.

(d)

Remove the pivot bolt, plate washer, adjusting lock bolt
and generator.

CH017–01

P14233

Plate Terminal

P14234

S05072

P10835

Turn

SST (A)

SST (B)

P10834

SST (C)

SST (B)

Insert

–

CHARGING

GENERATOR

CH–7

1011

1997 LEXUS ES300 (RM511U)

DISASSEMBLY

1.

REMOVE REAR END COVER

(a)

Remove the nut and terminal insulator.

(b)

Remove the screw, 3 nuts, plate terminal and end cover.

2.

REMOVE BRUSH HOLDER AND VOLTAGE
REGULATOR

(a)

Remove the brush holder cover from the brush holder.

(b)

Remove the 5 screws, brush holder and voltage regulator.

3.

REMOVE RECTIFIER HOLDER

(a)

Remove the 4 screws and rectifier holder.

(b)

Remove the 4 rubber insulators.

(c)

Remove the seal plate.

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.

(c)

Mount SST (C) in a vise.

(d)

Insert SST (B) into SST (C), and attach the pulley nut to
SST (C).