2001 TOYOTA AVALON Service Repair Manual

- DIAGNOSTICSBODY CONTROL SYSTEM
DI-661
817 Author
: Date
:
2001 AVALON (RM808U)
INSPECTION PROCEDURE
1 Check passenger buckle switch. (See page BE-53)
NG Replace the passenger buckle switch.
OK
2 Check seat belt warning occupant Detection sensor. (See page BE-53)
NG Replace the seat belt warning occupant Detec-
tion sensor.
OK
3 Check wireharness and connector between seat belt warning occupant Detec-
tion sensor and body ECU, passenger buckle switch and seat belt warning occu-
pant Detection sensor, passenger buckle switch and body ground.
NG Repair or replace wireharness or connector.
OK
Proceed to next circuit inspection shown on
problem symptoms table.
(See page DI-622)

I13659
P1
Park/Neutral
Position Switch
2PL7
G-W3
II2
G-W18 18
3A 3H
G-W1
B4Body ECU
R-L 20
3D
3C20 7
3C R-L D6
Diode
A/T Indicator Light
3 2
R-Y
*2
*1
R-L R-L
20
II1
11
1C
1B3 GAUGE No. 2
12
34 4IG1 RELAY
1C 1G
W
W-R
4Ignition Switch
IG1
AM1
2
W-LW-L 7
IF1 5 5AM1
21
BW-B
1
2H
2G1
B-L 1
F8 FL Block
1
F10
F61
BALT
FL MAINBattery
IGP
*1: FLOOR SHIFT
*2: COLUMN SHIFTJ/B No. 3
J/B No. 3
Driver Side J/B
J/B No. 5
Engine Room J/B
*2
I15 DI-664
- DIAGNOSTICSBODY CONTROL SYSTEM
820 Author
: Date
:
2001 AVALON (RM808U)
Park/Neutral Position Switch Circuit
CIRCUIT DESCRIPTION
The park/neutral position switch detects the shift lever p position and sends signals to the Body ECU.
WIRING DIAGRAM
DI6M1-01

- DIAGNOSTICSBODY CONTROL SYSTEM
DI-665
821 Author
: Date
:
2001 AVALON (RM808U)
INSPECTION PROCEDURE
1 Check A/T shift operation.
CHECK:
Check that the A/T shift operates normally.
NG Proceed to AT troubleshooting.
(See page DI-158)
OK
2 Check harness and connector between Body ECU and park/neutral position
switch (See page IN-30).
NG Repair or replace harness or connector.
OK
Check and replace Body ECU (See page
IN-30).

DI6LK-01
- DIAGNOSTICSBODY CONTROL SYSTEM
DI-627
783 Author
: Date
:
2001 AVALON (RM808U)
CIRCUIT INSPECTION
Power source circuit
CIRCUIT DESCRIPTION
This circuit provides power to operate the Body ECU.

I13637
B2
2G Engine Room J/B
DOOR No. 2
12
2C 2CW-L
L-RW-G
1
F7
F61FL Block
ALT1
F10
F81W
B-L
1
1
2H 2G
B
B52 1AM1
5
7
IF1
W-L
R-G
3
ACC
AM1 2IG1
W-R
FL MAIN
Battery 41B514
3C 3D
W-G24
B4Body ECU
B
9
1B
1J
1J
1C
1G W-L
L-R
W
R-G1 105 9ECU-B
7
ECU-ACC
3
1 DOOR No. 1BDR2
ACC
BDR1
1IG1 RELAY
42
3ECU-IG No. 2
2
SIG
4
1C
W-B
W-BW-B
W-B BB
IF J4 J/C
11
B4
B5 14GND2
GND1 DCC
1
Engine Room J/B
Engine Room R/B No. 5J/B No. 3
Driver Side J/B
3
Ignition Switch
IG W-L DI-628
- DIAGNOSTICSBODY CONTROL SYSTEM
784 Author
: Date
:
2001 AVALON (RM808U)
WIRING DIAGRAM

- DIAGNOSTICSBODY CONTROL SYSTEM
DI-629
785 Author
: Date
:
2001 AVALON (RM808U)
INSPECTION PROCEDURE
1 Check ECU-ACC, DOOR No. 1, DOOR No. 2, ECU-IG No. 2, ECU-B No. 1 and
ECU-B No. 2 fuse.
CHECK:
Check continuity of ECU-ACC, DOOR No. 1, DOOR No. 2, ECU-IG No. 2, ECU-B No. 1 and ECU-B No.
2 fuse.
OK:
Continuity
NG Replace the failure fuse.
OK
2 Check voltage between terminals ACC, B, BDR 1, BDR 2, SIG and GND or GND2
of Body ECU connector.
PREPARATION:
Turn ignition switch ON.
CHECK:
Measure voltage between terminals ACC, SIG, BDR 1, and GND, GND2.
OK:
Voltage: 10 - 14V
PREPARATION:
(a) Turn ignition switch OFF.
(b) Disconnect the Body ECU connector.
CHECK:
Measure voltage between terminals B, BDR 2, BSUB and GND, GND2.
OK:
Voltage: 10 - 14V
OK Proceed to next circuit inspection shown on
problem symptoms table (See page DI-622).
NG

DI-630
- DIAGNOSTICSBODY CONTROL SYSTEM
786 Author
: Date
:
2001 AVALON (RM808U)
3 Check wireharness and connector between Body ECU and body ground (See
page IN-30).
NG Repair or replace wireharness or connector.
OK
Check and repair wireharness and connector
between Body ECU and battery (See page
IN-30).

I13652
BatteryW-B
BM12
BB1
W-B
P151 22
5
Power WIndow
Motor RH
GP11
Power WIndow
Control Switch
Rear RH
D E
UB
DOWN
UP4
1
6L-W
R-BR-B R-B
G-B
G-BG-B 34
3 11 2 FL MAINB 1 1
F6 F10ALT W1G 1153
2
22
B5
B510RRD
RRU 12
1L PWR RELAY
P-B
6
IB2
P-B7
WLSWLG
D19
Driver
Door
ECU
1
1L RL P/W
10
1A BKJ11
J/C
A
W-B12
BA1
W-BP10
Power WIndow Control
Switch Rear LH
E
D
U R 212 P14
Power Window
Motor LHG
5DOWN
UP
B11
188
BA1
Y-R
Y-R
G-YG-Y
G-Y
PL-Y 4 6 3
3
2ID1
17
1B4
B422RLD
RLU
RBA1
ID1
BA1
IA1
RR P/W
FL Block
BB1
BB1
BB1IM2
IM2
IM2Body ECU
Driver Side J/BY-R
P
LG 3
- DIAGNOSTICSBODY CONTROL SYSTEM
DI-645
801 Author
: Date
:
2001 AVALON (RM808U)
Rear power window switch circuit
CIRCUIT DESCRIPTION
Power window switch circuit can be checked using DTC check. (Refer to DI-738)
WIRING DIAGRAM
DI6LS-01