2001 TOYOTA AVALON diagram

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

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

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

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

F09826
ABS & BA & TRAC
& VSC ECU
R+
SR
SFRH
SFRR
SFLH
SFLR
SRRH
SRRR
SRLH
SRLR
SMC1
SMC2
SRC1
SRC2 GR-R J/B No. 3
IF3Engine Room J/B No. 3
ABS
No. 2Engine
Room
J/BIE1
B-W2
A20
63A 19
3H GR-R
21
GR-RABS Solenoid Relay
FL
Block3
3 3 4
1
3 3
32 W
W-B
8 2F
10 2F
1 2G
1 F8
1 F6
B
FL
MAIN
Battery
EDW-BABS & BA & TRAC
& VSC ActuatorW-L RR176
36
A20
BS
SFRH
SFRR
SFLH
SFLR
SRRH
SRRR
SRLH
SRLR
SMC1
SMC2
SRC1
SRC226
A20
55
A20
5
A20
3
A20
6
A20
4
A20
53
A20
25
A20
49
A20
50
A20
54
A20
52
A20 W-G
W-R
G-O
GR
G-R
Y-B
L-Y
G-Y
V-W
B-Y
R-B B-W
W-G
W-R
G-O
GR
G-R
Y-B
L-Y
G-Y
V-W
B-Y
R-BIE12
IE13
IE14
IE15
IE16
IE17
IE110
IE111
IE112
IE113
IE114
IE115 2
A5
9
A5
11
A5
7
A5
8
A5
4
A5
5
A5
1
A5
3
A5
3
A6
2
A6
5
A6
4
A6 4
2F
B-L
ALT DI-274
- DIAGNOSTICSABS WITH EBD & BA & TRAC & VSC SYSTEM
430 Author
: Date
:
2001 AVALON (RM808U)
WIRING DIAGRAM

F09816
ABS & BA & TRAC
& VSC ECU
Engine RoomR/B No. 3
J/B No. 3
FL Block
FL MAIN7
A20
MR
2
A20 R+
27
A20
MT GR-L
ABS Motor Relay
W
B-L
Battery6
IE1
W-B
ABS GR-L
6
3AGR-R GR-R GR-R
3
3 3
31
23 4
Engine Room J/B 21
IF3
ALTABS No. 419
3H
ABS & BA & TRAC& VSC Actuator
6
A510
A5 L
L
OOEE
IF3
3 Engine Room R/B No. 5
12
215
5 5
5
B1
F61
F81
2G1
2H B DI-276
- DIAGNOSTICSABS WITH EBD & BA & TRAC & VSC SYSTEM
432 Author
: Date
:
2001 AVALON (RM808U)
DTC C0273 / 13 ABS Motor Relay Circuit
CIRCUIT DESCRIPTION
The ABS motor relay supplies power to the brake actuator pump motor. While the ABS & BA & TRAC & VSC
are activated, the ECU switches the motor relay ON and operates the brake actuator pump motor.
DTC No.DTC Detecting ConditionTrouble Area
C0273 / 13Open or short circuit is detected.
ABS motor relay

ABS motor relay circuit
WIRING DIAGRAM
DI6NZ-03

F09826
ABS & BA & TRAC
& VSC ECU
R+
SR
SFRH
SFRR
SFLH
SFLR
SRRH
SRRR
SRLH
SRLR
SMC1
SMC2
SRC1
SRC2 GR-R J/B No. 3
IF3Engine Room J/B No. 3
ABS
No. 2Engine
Room
J/BIE1
B-W2
A20
63A 19
3H GR-R
21
GR-RABS Solenoid Relay
FL
Block3
3 3 4
1
3 3
32 W
W-B
8 2F
10 2F
1 2G
1 F8
1 F6
B
FL
MAIN
Battery
EDW-BABS & BA & TRAC
& VSC ActuatorW-L RR176
36
A20
BS
SFRH
SFRR
SFLH
SFLR
SRRH
SRRR
SRLH
SRLR
SMC1
SMC2
SRC1
SRC226
A20
55
A20
5
A20
3
A20
6
A20
4
A20
53
A20
25
A20
49
A20
50
A20
54
A20
52
A20 W-G
W-R
G-O
GR
G-R
Y-B
L-Y
G-Y
V-W
B-Y
R-B B-W
W-G
W-R
G-O
GR
G-R
Y-B
L-Y
G-Y
V-W
B-Y
R-BIE12
IE13
IE14
IE15
IE16
IE17
IE110
IE111
IE112
IE113
IE114
IE115 2
A5
9
A5
11
A5
7
A5
8
A5
4
A5
5
A5
1
A5
3
A5
3
A6
2
A6
5
A6
4
A6 4
2F
B-L
ALT
- DIAGNOSTICSABS WITH EBD & BA & TRAC & VSC SYSTEM
DI-281
437 Author
: Date
:
2001 AVALON (RM808U)
WIRING DIAGRAM

F09813
Deceleration Sensor
IGA
GNDA
GL1(Shielded)
34
18YGNA
GL1 YIGA
A2078 13
AR
A20
A20ABS & BA & TRAC
& VSC ECU
(Shielded)
W
G ID1
14
ID1
16
ID1
15
ID1 BRBR-W
BR
BR3
Y1
6
Y1
5
Y1
IG
J4
J/CAR
W
G
BR-W
- DIAGNOSTICSABS WITH EBD & BA & TRAC & VSC SYSTEM
DI-285
441 Author
: Date
:
2001 AVALON (RM808U)
DTC C0365 / 43 Deceleration Sensor Circuit
CIRCUIT DESCRIPTION
Deceleration sensor is combined with yaw rate sensor.
DTC No.DTC Detecting ConditionTrouble Area
C0365 / 43
Detection of any of conditions from 1. through 4.:
1. The sensor signal is out of range, less than 0.25 V or
more than 4.75 V.
2. Deceleration difference between sensor signal and refer-
ence value is large.
3. Offset value of sensor signal is higher than the standard
value.
4. sensor signal change rapidly higher than the value at the
normal condition.

Deceleration sensor

Deceleration sensor circuit
WIRING DIAGRAM
DI6O1-03