engine TOYOTA AVALON 2001 Service Owners Manual
[x] Cancel search | Manufacturer: TOYOTA, Model Year: 2001, Model line: AVALON, Model: TOYOTA AVALON 2001Pages: 1897, PDF Size: 26.61 MB
Page 598 of 1897
F09799
ABS Actuator and ECU
A7 20
WA
Engine Room J/BEngine Room R/B No. 5
AM1
5 512
BIgnition Switch Driver Side J/B Multi Display
GAUGE No. 1
IG1 Relay10
1D
12
3 44
1C 3
1B1
1G W J/B No. 4
ABS
M65
M64
13
4F4
4DIE115
Battery FL Block
ALT 1
F8F61
BFL MAIN
IGB
B 7 A21
Active Light Relay
1 R-L
R-L
B-L ABS
D2
DLC215 4B
J/B No. 4
15 4A15
4HR-L
R-B R-B
4
W-R
IG1 AM12
7
IF1
1
2G1
2H
1
F10 W-BW-L
W-L 14
- DIAGNOSTICSANTI-LOCK BRAKE SYSTEM WITH ELECTRONIC
BRAKE FORCE DISTRIBUTION (EBD)DI-243
399 Author: Date:
2001 AVALON (RM808U)
ABS Warning Light Circuit
CIRCUIT DESCRIPTION
If the ECU detects trouble, the ABS warning light lights up and ABS control is prohibited at the same time.
At this time, the ECU records a DTC in memory.
Connecting terminals Tc and E
1 of the DLC1 makes the ABS warning light blink and output the DTC.
WIRING DIAGRAM
DI6NM-02
Page 601 of 1897
- DIAGNOSTICSANTI-LOCK BRAKE SYSTEM WITH ELECTRONIC
BRAKE FORCE DISTRIBUTION (EBD)DI-239
395 Author: Date:
2001 AVALON (RM808U)
4 Check battery positive voltage.
PREPARATION:
Start the engine.
CHECK:
Check the battery positive voltage.
OK:
Voltage: 10 - 16 V
NG Check and repair the charging system (See
page CH-1).
OK
5 Check operation of the ABS warning light.
PREPARATION:
(a) Turn the ignition switch OFF.
(b) Disconnect the connector from the ABS ECU.
(c) Turn the ignition switch ON.
CHECK:
Check the ABS warning light goes on.
OK Check and replace combination meter (See
page BE-2).
NG
6 Check for short circuit in harness and connector between active lamp relay and
ABS ECU (See page IN-30).
NG Repeir or replace harness or connector.
OK
Check and replace ABS ECU.
Page 602 of 1897
F09801
ABS Actuator
and ECU
A713
Battery J/B No. 3A21
Active Light Relay
Multi DisplayY-B
BRAKEPKB
PKB
Ignition Switch
IF1 A721
EBDW IE15
Y-B
6 5
8 3 Y-G
3B14
3A
6 3B
5
Y-G
B4
15R-W
IE116
R-Y
Y-G
1
P3
Parking
Brake
Switch W-BBody ECU
J1
J/CDriver Side J/B
B1
Bake Fluid
Level Warning
Switch
J/B No. 3
R-W3H
153B
15
15
3A
12
1I8
1H
R-W
1
2
B B
Engine Room J/BDriver Side J/BGAUGE No. 1 IG1 Relay
4
2D4
2F
W-B
ED
R-WR-WIC17
M63
M64R-B
J/B No. 4
13
4F4
4D
R-B
10
1D 1
2
3 44
1C 3
1B1
1G W
IGW-BEngine Room J/BEngine Room R/B No. 57
BAM1
B-L
FL Block
ALT5 512 1
2H 1
2G
1
F8
F10F61
BFL MAIN W-B
142
W-R
W-L
W-L R-Y DI-240
- DIAGNOSTICSANTI-LOCK BRAKE SYSTEM WITH ELECTRONIC
BRAKE FORCE DISTRIBUTION (EBD)
396 Author: Date:
2001 AVALON (RM808U)
BRAKE Warning Light Circuit
CIRCUIT DESCRIPTION
The BRAKE warning light lights up when the brake fluid is insufficient, parking brake is applied or the EBD
is defective.
WIRING DIAGRAM
DI6NL-02
Page 606 of 1897
DI6NC-01
F09803
ABS Actuator and ECU
+B
BAT
GND1
GND2 W-B
FL MAINFL Block
ALT
B-L
BatteryA717
A718
A719
A716 L
L
W-B
EE5 5
12 B
10 2F
42F 12H
12G
W-B
ED 1
F8 1
F6
BABS Engine Room R/B No. 5
Engine Room J/B
- DIAGNOSTICSANTI-LOCK BRAKE SYSTEM WITH ELECTRONIC
BRAKE FORCE DISTRIBUTION (EBD)DI-219
375 Author: Date:
2001 AVALON (RM808U)
CIRCUIT INSPECTION
DTC 11 ABS Solenoid Relay Circuit
CIRCUIT DESCRIPTION
This relay supplies power to each ABS solenoid. After the ignition switch is turned ON, if the initial check is
OK, the relay goes on.
DTC No.DTC Detecting ConditionTrouble Area
11
When any of the following 1. through 3. is detected:
1. 3 or more solenoids are shown faulty in response and
simultaneously solenoid supply voltage is detected
faulty.
2. Solenoid relay will not be switched OFF.
3. Solenoid relay is frozen in spite of its high valve relay
supply voltage.
ABS solenoid relay
ABS solenoid relay circuit
WIRING DIAGRAM
Page 608 of 1897
F09803
ABS Actuator and ECU
+B
BAT
GND1
GND2 W-B
FL MAINFL Block
ALT
B-L
BatteryA717
A718
A719
A716 L
L
W-B
EE5 5
12 B
10 2F
42F 12H
12G
W-B
ED 1
F8 1
F6
BABS Engine Room R/B No. 5
Engine Room J/B
- DIAGNOSTICSANTI-LOCK BRAKE SYSTEM WITH ELECTRONIC
BRAKE FORCE DISTRIBUTION (EBD)DI-221
377 Author: Date:
2001 AVALON (RM808U)
DTC 13 ABS Motor Relay Circuit
CIRCUIT DESCRIPTION
The ABS motor relay supplies power to the ABS pump motor. When the ABS is activated, the ECU switches
the ABS motor relay ON and operates the ABS pump motor.
DTC No.DTC Detecting ConditionTrouble Area
13
When any of the following 1. through 3. is detected:
1. Pump motor voltage is not supplied within 0.06 sec. after
actuation of the motor relay.
2. Pump motor voltage is high, and the motor relay will not
actuate for 2.5 sec. or more.
3. Pump motor voltage remains low for longer 0.4 sec. or
more and the pump repeats activating for 0.7 sec. 3
times maximally. After the last activation, the pump mo-
tor is deactivated gone dead because of short circuit.
ABS motor relay
ABS motor relay circuit
WIRING DIAGRAM
DI6ND-01
Page 610 of 1897
F09803
ABS Actuator and ECU
+B
BAT
GND1
GND2 W-B
FL MAINFL Block
ALT
B-L
BatteryA717
A718
A719
A716 L
L
W-B
EE5 5
12 B
10 2F
42F 12H
12G
W-B
ED 1
F8 1
F6
BABS Engine Room R/B No. 5
Engine Room J/B
- DIAGNOSTICSANTI-LOCK BRAKE SYSTEM WITH ELECTRONIC
BRAKE FORCE DISTRIBUTION (EBD)DI-223
379 Author: Date:
2001 AVALON (RM808U)
DTC 21 - 24 ABS Solenoid Circuit
CIRCUIT DESCRIPTION
This solenoid goes on when signals are received from the ECU, and controls the pressure acting on the
wheel cylinders thus controlling the braking force.
DTC No.DTC Detecting ConditionTrouble Area
21, 22, 23, 24Solenoid signal does not match the check result.Brake actuator
Each solenoid circuit
WIRING DIAGRAM
DI6NE-01
Page 618 of 1897
F09798
Battery W-B
W-BGND1ABS Actuator
and ECU
A715
EE EDY-R
IG1
W-R
ALT
AM1 Driver Side J/B
IG1 RelayECU-IG
No. 2
A719
GND2
A716 1H2
1C4 2
3 1
4 1G1
1B3
W42Ignition Switch
W-L
7IF1
W-L
5
52
1
BEngine Room R/B No. 5
FL Block Engine Room J/B
2H1
2G1
2F4
2F10 B-L
W-B F61
F81
F101
B
FL MAIN IGIG1 AM1
W-B
- DIAGNOSTICSANTI-LOCK BRAKE SYSTEM WITH ELECTRONIC
BRAKE FORCE DISTRIBUTION (EBD)DI-231
387 Author: Date:
2001 AVALON (RM808U)
DTC 41 Power Source Circuit
CIRCUIT DESCRIPTION
This is the power source for the ECU, hence the actuators.
DTC No.DTC Detecting ConditionTrouble Area
41
At a vehicle speed of about 6 km/h (4 mph), low battery
voltage is less than 9.4 V during non-operation of ABS
control or less than 8.8 V during operation of ABS control,
and high battery voltage is more than 17.4 V.Battery
Charging system
Power source circuit
WIRING DIAGRAM
DI6NH-01
Page 634 of 1897
BR3890
F02201
DLC1
Ts E
1
Tc
BR3904
0.13 sec. 0.12 sec.
ON
OFF
- DIAGNOSTICSANTI-LOCK BRAKE SYSTEM WITH ELECTRONIC
BRAKE FORCE DISTRIBUTION (EBD)DI-213
369 Author: Date:
2001 AVALON (RM808U)
(d) Clear the DTC.
(1) Using SST, connect terminals Tc and E
1 of DLC1.
SST 09843-18020
(2) Turn the ignition switch ON.
(3) Clear the DTC stored in ECU by depressing the
brake pedal 8 times or more within 5 seconds.
(4) Check that the warning light shows the normal
code.
(5) Remove the SST from the terminals of DLC1.
SST 09843-18020
HINT:
Cancellation cannot be done by removing the battery cable or
ECU-IG fuse.
2. SPEED SENSOR SIGNAL CHECK (TEST MODE)
(a) Check the sensor signal.
(1) Using SST, connect terminals Ts and E
1 of DLC1.
SST 09843-18020
(2) Start the engine.
(3) Check that the ABS warning light blinks.
HINT:
If the ABS warning light does not blink, inspect the ABS warning
light circuit (See page DI-243).
(4) Drive vehicle straight forward.
(5) Drive vehicle at a speed faster than 45 km/h (28
mph) for several seconds.
HINT:
If the brake is applied during the check, the check routine must
be started again.
(6) Stop the vehicle.
(7) Using SST, connect terminals Tc and E
1 of DLC1.
SST 09843-18020
(8) Read the number of blinks of the ABS warning light.
HINT:
See the list of DTC shown on the next page.
If every sensor is normal, a normal code is output (A cycle
of 0.25 sec. ON and 0.25 sec. OFF is repeated).
If 2 or more malfunction codes are identified at the same
time, the lowest numbered code will be displayed 1st.
Page 638 of 1897
F09823
ABS & BA &
TRAC & VSC ECU
WA A2081
47 1
B
W-B
B
BJ4
J/C
W-B W-B
IG Battery FL MAINA21
Active
Light
Relay
F10F8 F61 1
1ALT
W W
W-B
B-L
2G
2H 11
5512 AM1
B
W-LIF17 W-L 22
Y-R
IG1 AM1 4
Ignition Switch W-R 1B 1C1G1B1D
4
3 4 3 1
1
213 10 GAUGE No. 1
ECU-IG
No. 2
Y-R3C
3D 2
11 R-B
R-B 4D
4FM6M6
4
Multi
Display 13 45 R-LR-L
4A4B
4H15
15 15
R-L 14
E1
ABS D2
DLC2
ABS
J/B No. 4
J/B No. 3 Driver Side J/B
Engine Room J/B
Engine Room R/B No. 5J/B No. 4
FL Block IG1
Relay
B
- DIAGNOSTICSABS WITH EBD & BA & TRAC & VSC SYSTEM
DI-325
481 Author: Date:
2001 AVALON (RM808U)
ABS Warning Light Circuit
WIRING DIAGRAM
DI6OI-03
Page 640 of 1897
F09818
ABS & BA &
TRAC & VSC ECU
VSCW A2070
P-B
R-B 15
4D
4F 134 4F15
4C P-BJ/B No. 4
M6 M6
R-B4
10 Multi Display
Driver Side J/B
1G1
1D 10
1B3
1C4
3
4 12 IG1 RelayGAUGE
No. 1
W-R 2
IG1 AM1
4 Ignition Switch
W-L W
IF1
7
W-L
5
5 1 2AM1 Engine Room R/B No. 5
B2G 2H11W-B
IG B-L
Battery
FL MAIN
B
F61 F10 F81 1
ALT
FL BlockVSC
Engine Room J/B DI-322
- DIAGNOSTICSABS WITH EBD & BA & TRAC & VSC SYSTEM
478 Author: Date:
2001 AVALON (RM808U)
DTC Always ON Malfunction in ECU
VSC Warning Light Circuit
CIRCUIT DESCRIPTION
DTC No.DTC Detecting ConditionTrouble Area
Always ON
Either of the following 1. or 2. is detected:
1. There is a malfunction in the ECU internal circuit.
2. There is a malfunction in VSC warning light circuit.Charging system
VSC warning light circuit
HINT:
TOYOTA hand-held tester may not be able to be used when ECU is defective.
WIRING DIAGRAM
DI6OH-03