2001 TOYOTA AVALON Service Repair Manual

BR0LZ-04
BR-64
- BRAKEREAR SPEED SENSOR
1463 Author
: Date
:
2001 AVALON (RM808U)
INSTALLATION
Installation is in the reverse order of removal (See page BR-63).
AFTER INSTALLATION, CHECK SPEED SENSOR SIGNAL (See page DI-252 or DI-212)

BR0LY-03
R00330
R00331
- BRAKEREAR SPEED SENSOR
BR-63
1462 Author
: Date
:
2001 AVALON (RM808U)
REMOVAL
1. DISCONNECT SPEED SENSOR CONNECTOR
(a) Remove the seat cushion and seatback.
(b) Disconnect the speed sensor connector, and pull out the
sensor wire harness with the grommet.
2. REMOVE SPEED SENSOR
(a) Remove the bolt and speed sensor from the axle carrier.
Torque: 8.0 N´m (82 kgf´cm, 71 in.´lbf)
(b) Remove the 2 clamp bolts holding the sensor wire har-
ness to the body and shock absorber.
Torque: 5.4 N´m (55 kgf´cm, 48 in.´lbf)

BR0KG-05
BR-2
- BRAKETROUBLESHOOTING
1401 Author
: Date
:
2001 AVALON (RM808U)
TROUBLESHOOTING
PROBLEM SYMPTOMS TABLE
Use the table below to help you find the cause of the problem. The numbers indicate the priority of the likely
cause of the problem. Check each part in order. If necessary, replace these parts.
SymptomSuspect AreaSee page
Lower pedal or spongy pedal
5. Fluid leaks for brake system
6. Air in brake system
7. Piston seals (Worn or damaged)
8. Master cylinder (Faulty)
9. Booster push rod (Out of adjustment)DI-249
DI-346
BR-4
BR-28
BR-37
BR-13
BR-24
Brake drag
1. Brake pedal freeplay (Minimal)
2. Parking brake pedal travel (Out of adjustment)
3. Parking brake wire (Sticking)
4. Rear brake shoe clearance (Out of adjustment)
5. Pad (Cracked or distorted)
6. Piston (Stuck)
7. Piston (Frozen)
8. Tension or return spring (Faulty)
9. Booster push rod (Out of adjustment)
10.Vacuum leaks for booster system
11. Master cylinder (Faulty)BR-6
BR-9
-
BR-46
BR-25
BR-34
BR-28
BR-37
BR-28
BR-37
BR-43
BR-24
BR-22
BR-13
Brake pull
1. Piston (Stuck)
2. Pad (Oily)
3. Piston (Frozen)
4. Disc (Scored)
5. Pad (Cracked or distorted)BR-28
BR-37
BR-25
BR-34
BR-28
BR-37
BR-28
BR-37
BR-25
BR-34
Hard pedal but brake inefficient
1. Fluid leaks for brake system
2. Air in brake system
3. Piston (Stuck)
4. Pad (Cracked or distorted)
5. Pad (Oily)
6. Pad (Glazed)
7. Disc (Scored)
8. Booster push rod (Out of adjustment)
9. Vacuum leaks for booster systemDI-249
DI-346
BR-4
BR-28
BR-37
BR-25
BR-34
BR-25
BR-34
BR-25
BR-34
BR-28
BR-37
BR-24
BR-22

- BRAKETROUBLESHOOTING
BR-3
1402 Author
: Date
:
2001 AVALON (RM808U)Symptom
Suspect AreaSee page
Noise from brake
1. Pad (Cracked or distorted)
2. Installation bolt (Loosen)
3. Disc (Scored)
4. Pad support plate (Loosen)
5. Sliding pin (Worn)
6. Pad (Dirty)
7. Pad (Glazed)
8. Tension or return spring (Faulty)
9. Anti-squeal shim (Damage)
10.Hold-down spring (Damage)BR-25
BR-34
BR-28
BR-37
BR-28
BR-37
BR-25
BR-34
BR-28
BR-37
BR-25
BR-34
BR-25
BR-34
BR-43
BR-25
BR-34
BR-43

CH03U-03
Z11577
Except Maintenance-Free Battery
Z11556
Maintenance-Free Battery
Voltmeter
- CHARGINGCHARGING SYSTEM
CH-1
1274 Author
: Date
:
2001 AVALON (RM808U)
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.
Maintenance-Free Battery:
If under the lower level, replace the battery (or add distilled wa-
ter if possible). Check the charging system.
Except Maintenance-Free Battery:
If under the lower level, add distilled water.
2. Except Maintenance-Free Battery:
CHECK BATTERY SPECIFIC GRAVITY
Check the specific gravity of each cell.
Standard specific gravity: 1.25 - 1.29 at 20°C (68°F)
If the specific gravity is less than specification, charge the bat-
tery.
3. Maintenance-Free Battery:
CHECK BATTERY VOLTAGE
(a) After having driven the vehicle and in the case that 20
minutes have not passed after having stopped the en-
gine, turn the ignition switch ON and turn on the electrical
system (headlight, blower motor, rear defogger etc.) for
60 seconds to remove the surface charge.
(b) Turn the ignition switch OFF and turn off the electrical sys-
tems.
(c) Measure the battery voltage between the negative (-)
and positive (+) terminals of the battery.
Standard voltage: 12.5 - 12.9 V at 20°C (68°F)
If the voltage is less than specification, charge the battery.

Z18811
Blue White Red
OK Charging
NecessaryInsufficient
Water Maintenance-Free Battery
Type A
GREE NEYEDARK EYECLEAR EYE or
CHARGED DISCHARGEDADD WATER
Type B
LIGHT YELLOW
P13121
Z00038
DENSO Borroughs
P13120
CORRECT
WRONG CH-2
- CHARGINGCHARGING SYSTEM
1275 Author
: Date
:
2001 AVALON (RM808U)
HINT:
Check the indicator as shown in 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
(a) Visually check the belt for excessive wear, frayed cords
etc.
If any defect has been found, replace the drive belt.
HINT:
Cracks on the rib side of a belt are considered acceptable. If the
belt has chunks missing from the ribs, it should be replaced.
(b) Using a belt tension gauge, measure the drive belt ten-
sion.
Belt tension gauge:
DENSO BTG-20 (95506-00020)
Borroughs No. BT-33-73F
Drive belt tension:
New belt175 ± 5 lbf
Used belt115 ± 20 lbf
If the belt tension is not as specified, adjust it.
HINT:

ºNew beltº refers to a belt which has been used less than
5 minutes on a running engine.

ºUsed beltº refers to a belt which has been used on a run-
ning engine for 5 minutes or more.

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

Check with your hand to confirm that the belt has not
slipped out of the groove on the bottom of the pulley.

P19934
Z03473
Ammeter
Voltmeter
BatteryDisconnect Wire
from Terminal B
Generator
- CHARGINGCHARGING SYSTEM
CH-3
1276 Author
: Date
:
2001 AVALON (RM808U)

After installing a new belt, run the engine for about 5 min-
utes and recheck the belt tension.
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.
7. CHECK DISCHARGE 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 discharge
warning light is lit.
(d) Start the engine. Check that the light goes off.
If the light does not go off as specified, troubleshoot the dis-
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 the 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

P20106
Terminal F CH-4
- CHARGINGCHARGING SYSTEM
1277 Author
: Date
:
2001 AVALON (RM808U)
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.