TOYOTA SEQUOIA 2001 Service Repair Manual

CH0K7±03
B07241
Upper Level
Lower Level
B07242
Except Maintenance±Free Battery
± CHARGINGCHARGING SYSTEM
CH±1
2893 Author: Date:
2005 SEQUOIA (RM1146U)
CHARGING SYSTEM
ON±VEHICLE INSPECTION
CAUTION:

Check that the battery cables are connected to the
correct terminals.

Disconnect the battery cables when the battery is giv-
en a quick charge.

Do not perform tests with a high voltage insulation re-
sistance tester.

Never disconnect the battery while the engine is run-
ning.
1. CHECK BATTERY ELECTROLYTE LEVEL
Check the electrolyte quantity of each cell.
If under the lower level, replace the battery (or add distilled wa-
ter if possible) and check the charging system.
2. Except Maintenance±Free Battery:
CHECK BATTERY SPECIFIC GRAVITY
Check the specific gravity of each cell.
Standard specific gravity:
1.25 to 1.29 at 20°C (68°F)
If the specific gravity is less than the specification, charge the
battery.
3. Maintenance±Free Battery:
CHECK BATTERY VOLTAGE
(a) In the case that 20 minutes have not passe4d after stop-
ping the engine, turn on the ignition switch and the electri-
cal system (headlight, blower motor, rear defogger, etc.)
for 60 seconds before removing the surface charge.
(b) Turn the ignition switch OFF and turn off the electrical sys-
tems.

B07243
Voltmeter
Maintenance±Free Battery
P14937
Maintenance±Free Battery
GREEN EYE DARK EYECLEAR EYE or
CHARGED DISCHARGED ADD WATERLIGHT YELLOW
Z00030
B00807
CH±2
± CHARGINGCHARGING SYSTEM
2894 Author: Date:
2005 SEQUOIA (RM1146U)
(c) Measure the battery voltage between the negative (±)
and positive (+) terminals of the battery.
Standard voltage:
12.5 to 12.9 V at 20°C (68°F)
If the voltage is less than the specification, charge the battery.
HINT:
Check the indicator as shown in the illustration.
4. CHECK BATTERY TERMINALS, FUSIBLE LINK AND
FUSES
(a) Check that the battery terminals are not loose or cor-
roded.
(b) Check the fusible link and fuses for continuity.
5. INSPECT DRIVE BELT
HINT:
Since the belt tensioner is used, checking the belt tension is not
necessary.
(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 counterclockwise. The pulley bolt for the belt
tensioner has a left±hand thread.
(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 does not slipped off the
pulley.
If necessary, replace the belt tensioner.

B00808
B
A
AC2024
CORRECT WRONG
Z03473
Ammeter
Disconnect Wire
from Terminal B
Battery
VoltmeterB
Generator
± CHARGINGCHARGING SYSTEM
CH±3
2895 Author: Date:
2005 SEQUOIA (RM1146U)

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 belt, check that it fits properly in the
ribbed grooves.

Check by hand to confirm that the belt does not slipped
out of the groove on the bottom of the pulley.
6. REMOVE ENGINE UNDER COVER NO.1
7. VISUALLY CHECK GENERATOR WIRING AND LIS-
TEN 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.
8. CHECK CHARGE WARNING LIGHT CIRCUIT
(a) Warm up the engine and then turn it off.
(b) Switch off all accessories.
(c) Turn the ignition switch ON, and check that the charge
warning light comes on.
(d) Start the engine, and check that the light goes off.
If the light does not go off as specified, troubleshoot the charge
light circuit.
9. 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 to 14.0 V

CH±4
± CHARGINGCHARGING SYSTEM
2896 Author: Date:
2005 SEQUOIA (RM1146U)
If the voltmeter reading is more than the standard voltage, re-
place the voltage regulator.
If the voltmeter reading is less than the standard voltage, check
the voltage regulator and generator.
10. INSPECT CHARGING CIRCUIT WITH LOAD
(a) With the engine running at 2,000 rpm, turn on the high
beam headlights and set the heater blower switch to 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.
11. REINSTALL ENGINE UNDER COVER

CH073±08
B16569
Generator Connector
Generator Wire
N´m (kgf´cm, ft´lbf): Specified torque
39 (400, 29)
Engine Under Cover
x 5 Drive BeltWire ClampPS Vane Pump
39 (400, 29)
Terminal Cap
Intake Air ConnectorThrottle Body Cover
39 (400, 29)
39 (400, 29)
15.5 (158, 11)
Generator
9.8 (100, 87 in.´lbf)
± CHARGINGGENERATOR
CH±5
2897 Author: Date:
2005 SEQUOIA (RM1146U)
GENERATOR
COMPONENTS

B16695
Pulley

Front Bearing Bearing Retainer

Rear Bearing
Drive End Frame (Stator)Rotor
Generator Washer
Bearing Cover
Rectifier End Frame
Terminal Insulator
Brush Holder

Non±reusable partRear End Cover
N´m (kgf´cm, ft´lbf): Specified torque
110.3 (1,125, 81)
2.6 (27, 23 in.´lbf)
2.6 (27, 23 in.´lbf)
5.8 (59, 51 in.´lbf)
5.8 (59, 51 in.´lbf)
1.8 (18, 16 in.´lbf)
4.6 (47, 41 in.´lbf)
CH±6
± CHARGINGGENERATOR
2898 Author: Date:
2005 SEQUOIA (RM1146U)

CH0LY±02
B00809
± CHARGINGGENERATOR
CH±7
2899 Author: Date:
2005 SEQUOIA (RM1146U)
REMOVAL
1. REMOVE ENGINE UNDER COVER
2. REMOVE THROTTLE BODY COVER
3. DISCONNECT CABLE FROM NEGATIVE (±) BATTERY
TERMINAL
4. DISCONNECT INTAKE AIR CONNECTOR FROM
THROTTLE BODY
5. REMOVE DRIVE BELT
Loosen the belt tension by turning the belt tensioner counter-
clockwise, and remove the drive belt.
HINT:
The pulley bolt for the belt tensioner has a left hand thread.
6. REMOVE PS VANE PUMP FROM ENGINE
(See page SR±28)
7. REMOVE GENERATOR
(a) Disconnect the generator connector.
(b) Remove the terminal cap and nut, and disconnect the
generator wire.
(c) Disconnect the wire clamp from the cord clip on the gener-
ator.
(d) Remove the bolt, the 2 nuts and the generator.

CH0LZ±02
B16358
B16369SST (B)
SST (A)
Turn
B16371
SST (C)
SST (B)
Insert
B16372
SST (C)
SST (A)
Turn
B16370
Turn
SST (A)
SST (B)
CH±8
± CHARGINGGENERATOR
2900 Author: Date:
2005 SEQUOIA (RM1146U)
DISASSEMBLY
1. REMOVE REAR END COVER
(a) Remove the 3 nuts the and end cover.
(b) Remove the terminal insulator.
2. REMOVE BRUSH HOLDER
(a) Remove the 2 screws and brush holder.
3. REMOVE PULLEY
(a) Hold SST (A) with a torque wrench, and tighten SST (B)
clockwise to the specified torque.
SST 09820±63011
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).
(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.

B16364
B16366
SST
± CHARGINGGENERATOR
CH±9
2901 Author: Date:
2005 SEQUOIA (RM1146U)
4. REMOVE COIL ASSEMBLY
(a) Remove the 4 bolts.
(b) Using SST, remove the coil assembly.
SST 09950±40011 (09951±04020, 09952±04010
09953±04020, 09954±04010, 09955±04071,
09958±04011)
(c) Remove the generator washer.
5. REMOVE ROTOR FROM DRIVE END FRAME

CH0M0±02
B12264
Ohmmeter
Continuity
B12265
Ohmmeter
No Continuity
B12266
B16374
Length CH±10
± CHARGINGGENERATOR
2902 Author: Date:
2005 SEQUOIA (RM1146U)
INSPECTION
1. INSPECT ROTOR
(a) Check the rotor for open circuit.
Using an ohmmeter, check that there is continuity be-
tween the slip rings.
Standard resistance: 1.5 to 1.9 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 to 14.4 mm (0.559 to 0.567 in.)
Minimum diameter: 14.0 mm (0.551 in.)
If the diameter is less than the minimum, replace the rotor.
2. INSPECT BRUSHES
Using vernier caliper, measure the exposed brush length.
Standard exposed length: 10.5 mm (0.413 in.)
Minimum exposed length: 4.5 mm (0.177 in.)
If the exposed length is less than the minimum, replace the
brushes and the brush holder assembly.
3. INSPECT BEARING
Check the bearing is not rough or worn.
If necessary, replace the bearing (See page CH±11).