Page 796 of 969
190SI-01
- STARTING & CHARGINGCHARGING SYSTEM (3MZ-FE)
19-15
2347 Author: Date:
2005 LEXUS ES330 REPAIR MANUAL (RM1124U)
CHARGING SYSTEM (3MZ-FE)
PRECAUTION
1. SYSTEM INITIALIZATION
NOTICE:
When disconnecting the negative (-) battery terminal, initialize the following systems after the termi-
nal is reconnected.
System NameSee Page
Power Window Control System05-1470
Sliding Roof System74-8
2. Check that the battery cables are connected to the correct terminals.
3. Disconnect the battery cables if a quick charge is given to the battery.
4. Do not perform tests with a high voltage insulation resistance tester.
5. Never disconnect the battery while the engine is running.
6. Check that the charging cable is tightened on terminal B of the generator and the fuse box.
7. Do not check whether the alternator generates current or not with terminal F connected to the
other terminals.
Page 797 of 969
190SJ-01
A01260
A82941
White Red Blue 19-16
- STARTING & CHARGINGCHARGING SYSTEM (3MZ-FE)
2348 Author: Date:
2005 LEXUS ES330 REPAIR MANUAL (RM1124U)
ON-VEHICLE INSPECTION
1. INSPECT BATTERY (MAINTENANCE- FREE BAT-
TERY)
(a) Check the battery electrolyte level.
(1) Check the electrolyte quantity of each cell.
If the electrolyte quantity is below the recommended amount,
replace the battery.
(b) Check the battery voltage.
(1) If it has been less than 20 minutes since you
stopped driving the vehicle or since the engine was
stopped, turn the ignition switch and electrical sys-
tems (headlight, blower motor, rear defogger etc.)
to the ON position for 60 seconds. This will remove
the surface charge on the battery.
(2) Turn the ignition switch and electrical systems OFF.
(3) Using a voltmeter, measure the battery voltage be-
tween the negative (-) and positive (+) terminals of
the battery.
Standard voltage: 12.5 to 12.9 V at 20C (68F)
If the voltage is less than the specification, charge the battery.
(c) Check the indicator as shown in the illustration.
HINT:
Blue: OK
White: Charging Necessary
Red: Insufficient Water
2. INSPECT BATTERY (EXCEPT MAINTENANCE-FREE
BATTERY)
(a) Check the battery electrolyte level.
(1) Check the electrolyte quantity of each cell.
If the electrolyte quantity is below the recommended amount,
add distilled water.
Page 798 of 969
A01259
A01260
A82941
White Red Blue
B00543
- STARTING & CHARGINGCHARGING SYSTEM (3MZ-FE)
19-17
2349 Author: Date:
2005 LEXUS ES330 REPAIR MANUAL (RM1124U)
(b) Check the battery specific gravity.
(1) Check the specific gravity of each cell.
Standard specific gravity: 1.25 to 1.29 at 20C (68F)
If the specific gravity is less than specification, charge the bat-
tery.
(c) Check the battery voltage.
(1) If it has been less than 20 minutes since you
stopped driving the vehicle or since the engine was
stopped, turn the ignition switch and electrical sys-
tems (headlight, blower motor, rear defogger etc.)
to the ON position for 60 seconds. This will remove
the surface charge on the battery.
(2) Turn the ignition switch and electrical systems OFF.
(3) Using a voltmeter, measure the battery voltage be-
tween the negative (-) and positive (+) terminals of
the battery.
Standard voltage: 12.5 to 12.9 V at 20C (68F)
If the voltage is less than the specification, charge the battery.
(d) Check the indicator as shown in the illustration.
HINT:
Blue: OK
White: Charging Necessary
Red: Insufficient Water
3. INSPECT BATTERY TERMINALS, FUSIBLE LINK AND FUSES
(a) Visually check the battery terminals.
(1) Check that the battery terminals are not loosened or corroded.
(b) Visually check the fusible link and fuses.
(1) Check that there is continuity of the fusible links, high current fuses and regular fuses.
4. INSPECT V-RIBBED BELT
(a) Visually check the belt for excessive wear, frayed cords,
etc.
If any defects are found, replace the v-ribbed belt.
Cracks on the rib side of the belt are considered ac-
ceptable.
If the belt has chunks missing from the ribs, it should
be replaced.
Page 799 of 969
B00540
A88419
Disconnect Wire
from Terminal B
Generator Voltmeter
BatteryAmmeter 19-18
- STARTING & CHARGINGCHARGING SYSTEM (3MZ-FE)
2350 Author: Date:
2005 LEXUS ES330 REPAIR MANUAL (RM1124U)
(b) Check that the belt fits properly in the ribbed grooves.
Confirm that the belt has not slipped out of the groove on the
bottom of the pulley by hand.
5. INSPECT GENERATOR WIRING
(a) Visually check the generator wiring.
(1) Check that the wiring is in good condition.
6. INSPECT ABNORMAL NOISES
(a) Listen to abnormal noises from generator.
(1) Check that no abnormal noise is heard from the generator while the engine is running.
7. INSPECT CHARGE WARNING LIGHT CIRCUIT
(a) Turn the ignition switch ON. Check that the charge warning light comes on.
(b) Start the engine, then check that the light goes off.
If the light does not operate as specified, troubleshoot the charge warning light circuit.
8. INSPECT CHARGING CIRCUIT WITHOUT LOAD
(a) If a tester is not available, connect a voltmeter to the
charging circuit as follows.
(1) Disconnect the wire from terminal B of the genera-
tor, then connect it to the negative (-) lead of the
ammeter.
(2) Connect the positive (+) lead of the ammeter to ter-
minal B of the generator.
(3) Connect the positive (+) lead of the voltmeter to ter-
minal B of the generator.
(4) Ground the negative (-) lead of the voltmeter.
(b) Check the charging circuit.
(1) Keep the engine speed at 2,000 rpm, then check
the reading on the ammeter and voltmeter.
Standard amperage: 10 A or less
Standard voltage: 13.2 to 14.8 V
9. INSPECT CHARGING CIRCUIT WITH LOAD
(a) With the engine running at 2,000 rpm, turn the high beam headlights ON and turn the heater blower
switch to the ºHIº position.
(b) Check the reading on the ammeter.
Standard amperage: 30 A or more
If the ammeter reading is less than the standard amperage, repair the generator.
If the battery is fully charged, the indication will sometimes be less than the standard amperage.
Page 800 of 969
190SK-01
A87596N´m (kgf´cm, ft´lbf) : Specified torqueGenerator
Connector
Generator Assy
V-ribbed Belt No. 1
18 (184, 13)
Plate Washer
9.8 (100, 7)
58 (591, 43)
8.4 (86, 74 in.Vlbf)
Wiring Harness Clamp Bracket
- STARTING & CHARGINGGENERATOR ASSY (3MZ-FE)
19-19
2351 Author: Date:
2005 LEXUS ES330 REPAIR MANUAL (RM1124U)
GENERATOR ASSY (3MZ-FE)
COMPONENTS
Page 801 of 969
A86392
Generator Pulley
Drive End Frame Assy
GeneratorGenerator Rotor AssyGenerator Washer
Generator Coil AssyTerminal Insulator
Generator
Brush Holder Assy
Generator
Rear End Cover
x4
Non-reusable part
N´m (kgf´cm, ft´lbf) : Specified torque
5.8 (59, 51 in.Vlbf)
1.8 (18, 16 in.Vlbf)
4.6 (47, 41 in.Vlbf)
111 (1,125, 81)
x2x3 19-20
- STARTING & CHARGINGGENERATOR ASSY (3MZ-FE)
2352 Author: Date:
2005 LEXUS ES330 REPAIR MANUAL (RM1124U)
Page 802 of 969
190SL-01
A86379
(a)
(b)
(c)
(a)
Terminal Cap
A87594
B
AC
A87593
B
A
A87595
(h)
- STARTING & CHARGINGGENERATOR ASSY (3MZ-FE)
19-21
2353 Author: Date:
2005 LEXUS ES330 REPAIR MANUAL (RM1124U)
REPLACEMENT
1. DISCONNECT ENGINE WIRE NO. 3 (BATTERY NEGATIVE TERMINAL)
2. REMOVE GENERATOR ASSY
(a) Remove the 2 wire harness clamps.
(b) Disconnect the generator connector.
(c) Open the terminal cap.
(d) Remove the nut, then disconnect the generator wire.
(e) Loosen bolts A and B.
(f) Loosen bolt C to lessen the tension of the V-ribbed belt
No.1.
(g) Remove bolts A and B, then remove the generator.
(h) Remove the bolt, then remove the wiring harness clamp
bracket.
Page 803 of 969
A87593
B
A
A87594
B
AC 19-22
- STARTING & CHARGINGGENERATOR ASSY (3MZ-FE)
2354 Author: Date:
2005 LEXUS ES330 REPAIR MANUAL (RM1124U)
3. INSTALL GENERATOR ASSY
(a) Install the wiring harness clamp bracket with the bolt.
Torque: 8.4 NVm (86 kgfVcm, 74 in.Vlbf)
(b) Temporarily install the generator with bolts A and B.
(c) Adjust the V-ribbed belt No. 1 tension by tightening bolt
C (see page 14-1).
(d) Tighten bolts A and B.
Torque:
18 NVm (180 kgfVcm, 13 ftVlbf) for bolt A
58 NVm (591 kgfVcm, 43 ftVlbf) for bolt B
(e) Install the generator wire with the nut.
Torque: 9.8 NVm (100 kgfVcm, 7 ftVlbf)
(f) Connect the generator connector.
(g) Install the wire harness clamp.
4. INSPECT DRIVE BELT (See page 14-1)
5. CONNECT ENGINE WIRE NO. 3 (BATTERY NEGATIVE TERMINAL)
Torque: 5.4 NVm (55 kgfVcm, 48 in.Vlbf)
6. SYSTEM INITIALIZATION (See page 19-15)
