TOYOTA AVALON 2001 Service Repair Manual
Manufacturer: TOYOTA, Model Year: 2001, Model line: AVALON, Model: TOYOTA AVALON 2001Pages: 1897, PDF Size: 26.61 MB
Page 641 of 1897
- DIAGNOSTICSABS WITH EBD & BA & TRAC & VSC SYSTEM
DI-323
479 Author: Date:
2001 AVALON (RM808U)
INSPECTION PROCEDURE
1 Check that the ECU connectors are securely connected to the ECU.
NO Connect the connector to the ECU.
YES
2 Is DTC output?
Check DTC on page DI-252.
YES Repair circuit indicated by the output code .
NO
3 Does VSC warning light go off?
YES Check for open or short circuit in harness and
connector between ECU-IG fuse and ECU (See
page IN-30).
NO
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
Page 642 of 1897
DI-324
- DIAGNOSTICSABS WITH EBD & BA & TRAC & VSC SYSTEM
480 Author: Date:
2001 AVALON (RM808U)
5 Check operation of the VSC warning light.
In case of using the TOYOTA hand-held tester:
PREPARATION:
(a) Connect the TOYOTA hand-held tester to the DLC3.
(b) Turn the ignition switch ON and push the TOYOTA hand-held tester main switch ON.
(c) Select the ACTIVE TEST mode on the TOYOTA hand-held tester.
CHECK:
Check that ºONº and ºOFFº of the VSC warning light can be shown on the combination meter by the TOYOTA
hand-held tester.
In case of not using the TOYOTA hand-held tester:
PREPARATION:
(a) Turn the ignition switch OFF.
(b) Disconnect the connector from the ABS & BA & TRAC & VSC ECU.
(c) Turn the ignition switch ON.
CHECK:
Check the VSC warning light goes off.
NG Check and replace combination meter (See
page BE-2).
OK
6 Check for short circuit in harness and connector between combination meter
and ABS & BA & TRAC & VSC ECU, combination meter and DLC1 (See page
IN-30).
NG Repair or replace harness or connector.
OK
Check and replace ABS & BA & TRAC & VSC
ECU.
Page 643 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-319
475 Author: Date:
2001 AVALON (RM808U)
DTC Always ON Malfunction in ECU
ABS Warning Light Circuit
CIRCUIT DESCRIPTION
DTC No.DTC Detecting ConditionTrouble Area
Always ON
Either of the following 1., 2. or 3. is detected:
1. The ECU connectors are OFF the ECU.
2. There is a malfunction in the ECU internal circuit.
3. There is a malfunction in ABS warning light circuit.
Charging system
ABS warning light circuit
HINT:
TOYOTA hand-held tester may not be able to be used when the ECU is defective.
WIRING DIAGRAM
DI6OG-02
Page 644 of 1897
DI-320
- DIAGNOSTICSABS WITH EBD & BA & TRAC & VSC SYSTEM
476 Author: Date:
2001 AVALON (RM808U)
INSPECTION PROCEDURE
1 Check that the ECU connectors are securely connected to the ECU.
NO Connect the connector to the ECU.
YES
2 Is DTC output?
Check DTC on page DI-252.
YES Repair circuit indicated by the output code .
NO
3 Does ABS warning light go off?
YES Check for open or short circuit in harness and
connector between ECU-IG fuse and ECU (See
page IN-30).
NO
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
Page 645 of 1897
- DIAGNOSTICSABS WITH EBD & BA & TRAC & VSC SYSTEM
DI-321
477 Author: Date:
2001 AVALON (RM808U)
5 Check operation of the ABS warning light.
In case of using the TOYOTA hand-held tester:
PREPARATION:
(a) Connect the TOYOTA hand-held tester to the DLC3.
(b) Turn the ignition switch ON and push the TOYOTA hand-held tester main switch ON.
(c) Select the ACTIVE TEST mode on the TOYOTA hand-held tester.
CHECK:
Check that ºONº and ºOFFº of the ABS warning light can be shown on the combination meter by the TOYOTA
hand-held tester.
In case of not using the TOYOTA hand-held tester:
PREPARATION:
(a) Turn the ignition switch OFF.
(b) Disconnect the connector from the ABS & BA & TRAC & VSC 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 & BA & TRAC & VSC ECU (See page IN-30).
NG Repeir or replace harness or connector.
OK
Check and replace ABS & BA & TRAC & VSC
ECU.
Page 646 of 1897
F09824
Battery
FL MAIN F10 F8
F611 1
ALT
BFL BlockB-L 2G 2H1 1 Engine Room J/B B5512 AM1 Engine Room R/B No. 5 W-LIF17
W-L
2
IG1 AM1 4Ignition Switch W-R W
1C 1G
1B 1D
4
4 3 1
1
2
3 10 GAUGE No. 1 Driver Side J/B
IG1 Relay
W-B
IG
ED CUP
BRAKE
Multi DisplayM6 M3M6R-B
3 4
74D 4F13
4 J/B No. 4
R-B
L-O L-O6
IL1
R-WR-W
R-W
R-W
7
IC13A21
Active
Light
RelayR-Y 8A20
6040 74 68
32 ABS & BA &
TRAC & VSC ECU
FSS LBL PKB EBDW SP1
T5
T5
T5
T5 T5
Y-G
L-B
BR (Shielded)15
25 16
2
11
LBL LVL2PKB2BRL
PKB
Y-G Y-G
R-W
R-WJ/B No. 3
3B 3A
3A 3B 5
15
15 14
1Driver Side J/B
B1
Brake Fluid Level
Warning Switch Translate ECU
1H
1I 12
8
R-W
1 2
W-B J1 J/C
B B
W-BEngine Room J/B
44
2D2FW-B P3
Parking
Brake
SwitchA20
A20
A20
A20 DI-330
- DIAGNOSTICSABS WITH EBD & BA & TRAC & VSC SYSTEM
486 Author: Date:
2001 AVALON (RM808U)
BRAKE Warning Light Circuit
CIRCUIT DESCRIPTION
The BRAKE warning light lights up when the brake fluid is insufficient, when the parking brake is ap-
plied or when the EBD is defective.
If the translate ECU detects trouble, it makes VSC warning light lights up while prohibiting VSC & TRAC
control. At this time, the ECU records a DTC in memory. Connect terminals Tc and E
1 of the DLC1 or
DLC2 to make BRAKE warning light blink and output the DTC.
WIRING DIAGRAM
DI6OK-02
Page 647 of 1897
- DIAGNOSTICSABS WITH EBD & BA & TRAC & VSC SYSTEM
DI-331
487 Author: Date:
2001 AVALON (RM808U)
INSPECTION PROCEDURE
1 Check parking brake switch circuit (See page BE-53).
NG Repair or replace parking brake switch circuit.
OK
2 Check brake fluid level warning switch circuit (See page BE-53).
NG Repair or replace brake fluid level warning
switch circuit.
OK
3 Is DTC output for ABS ?
YES Repair circuit indicated by the output code.
No
4 Check BRAKE warning light.
See combination meter troubleshooting on page BE-2.
NG Repair or replace combination meter.
OK
Page 648 of 1897
DI-332
- DIAGNOSTICSABS WITH EBD & BA & TRAC & VSC SYSTEM
488 Author: Date:
2001 AVALON (RM808U)
5 Check active lamp relay.
NG Replace active lamp relay.
OK
6 Check for open or short circuit in harness and connector between combination
meter and active lamp relay (See page IN-30).
NG Repair or replace harness or connector.
OK
7 Check for open or short circuit in harness and connector between active lamp
relay and ABS & BA & TRAC & VSC ECU (See page IN-30).
NG Repair or replace harness or connector.
OK
Check and replace ABS & BA & TRAC & VSC
ECU.
Page 649 of 1897
DI6NX-03
BR3583
BR3582F00010
RotorSpeed Sensor
Magnet
To ECU
+V
-VHigh Speed
Low Speed
CoilNS
- DIAGNOSTICSABS WITH EBD & BA & TRAC & VSC SYSTEM
DI-267
423 Author: Date:
2001 AVALON (RM808U)
CIRCUIT INSPECTION
DTC
C0200 / 31 - C1331 / 36Speed Sensor Circuit
DTC
C1332 / 38, C1333 / 39Speed Sensor Circuit
CIRCUIT DESCRIPTION
The speed sensor detects a wheel speed and sends the ap-
propriate signals to the ECU. These signals are used to control
of the ABS and VSC system. Each of the front and rear rotors
has 48 serrations.
When the rotors rotate, a magnetic field emitted by a permanent
magnet in the speed sensor generates an AC voltage. Since
the frequency of this AC voltage changes in direct proportion to
the speed of the rotor, the frequency is used by the ECU to de-
tect the speed of each wheel.
DTC No.DTC Detecting ConditionTrouble Area
C0200 / 31
C0205 / 32
C0210 / 33
C0215 / 34
When any of the following 1. to 3. is detected :
1. Vehicle speed is more than 40 km/h (25 mph), pulses
are not input for 0.01 sec.
2. After the initial start or restart and when the vehicle
speed has reached 12 km/h (7 mph), the wheel speed of
0 km/h (0 mph) is detected.
3. After the initial start or restart and when the vehicle
speed has reached 18 km/h (11 mph), the front wheel
speed of 0 km/h (0 mph) is detected.
Right front, left front, right rear, left rear speed sensor
Each speed sensor circuit
Sensor installation
C1330 / 35
C1331 / 36
C1332 / 38
C1333 / 39
Detecting abnormality in the resistance value of each speed
sensor.Right front, left front, right rear, left rear speed sensor
Each speed sensor circuit
HINT:
DTC No. C0200 / 31 and C1330 / 35 are for the right front speed sensor.
DTC No. C0205 / 32 and C1331 / 36 are for the left front speed sensor.
DTC No. C0210 / 33 and C1332 / 38 are for the right rear speed sensor.
DTC No. C0215 / 34 and C1333 / 39 are for the left rear speed sensor.
Page 650 of 1897
F09825
(Shielded)
FR-
2
IE1A2016
BR B-W
J4
J/C (Shielded) 1
A9
Right Front
Speed Sensor
19
IE1 18
IE120
BR-W
A
AA
A
BR
(Shielded)ABS & BA & TRAC
& VSC ECU
FR+ A2017
FL-
A2010
FL+ A208 L
B-R
BR (Shielded)
B-R
BR
2 1
A8
Left Front
Speed Sensor
A
(Shielded)RR-
A2012
RR+ A2011
RL-
A2014
RL+ A2013 V
LG
(Shielded) V
LG
(Shielded)Y
GIK110
IK1 11
IK112Y
G
ID111
ID1 21
ID122 2
1 A30
Right
Rear
Speed
Sensor
2
1 A29
Left
Rear
Speed
Sensor
IGBR
BR-W DI-268
- DIAGNOSTICSABS WITH EBD & BA & TRAC & VSC SYSTEM
424 Author: Date:
2001 AVALON (RM808U)
WIRING DIAGRAM