TOYOTA AVALON 2001 Service Repair Manual

I13649
D11
Door Courtesy Switch
Front LH
1
R-L1717
3E
3D
R-L5
B4Body ECU
DCTY
PCTY 1
O1717
4E
4F
O3
B5 D12
Door Courtesy Switch
Front RH
D13
Door Courtesy Switch
Rear LH
1
R-WR-W 2
IA1145
4F4F
4E 5R-W16
B5
RCTY
D14
Door Courtesy Switch
Rear RH
1R-W J/B No. 3
J/B No. 4
J/B No. 4
- DIAGNOSTICSBODY CONTROL SYSTEM
DI-639
795 Author
: Date
:
2001 AVALON (RM808U)
Door courtesy switch circuit
CIRCUIT DESCRIPTION
The door courtesy switch goes on when the door is opened and goes off when door is closed.
WIRING DIAGRAM
DI6LP-01

DI-640
- DIAGNOSTICSBODY CONTROL SYSTEM
796 Author
: Date
:
2001 AVALON (RM808U)
INSPECTION PROCEDURE
1 Check operation of door courtesy light.
CHECK:
Check that door courtesy light comes on when door opened, and goes off when door is closed.
OK:
Must be operated normally.
OK Proceed to next circuit inspection shown on
problem symptom table (See page DI-622).
NG
2 Check courtesy switch (See page BE-31).
NG Replace the courtesy switch.
OK
3 Check wireharness and connector between courtesy light and body ECU, courte-
sy switch and body door ECU (See page IN-30).
NG Repair or replace wireharness or connector.
OK
Proceed to next circuit inspection shown on
problem symptoms table (See page
DI-622).

I13651
BKA A
J11
J/C W-B BA18W-B43 D15
Door Unlock
Detection Switch Rear LH
L-OBA19
L-O66
3E 3F
3F19L-O
L-O L-O
L-OBody ECU
5
B5 LSR
10
IM2 BB19
21
W-B
Door Unlock
Detection Switch Rear RHD16
8
BB1
W-B
BM J/B No. 3
- DIAGNOSTICSBODY CONTROL SYSTEM
DI-643
799 Author
: Date
:
2001 AVALON (RM808U)
Rear door unlock detection switch circuit
CIRCUIT DESCRIPTION
The door unlock detection switch is built in the door lock motor assembly. This switch is ON when the door
lock knob is in the unlock position and OFF when the lock knob is in the lock position. The ECU detects the
door lock knob conditions is this circuit. It is used as one of the operating conditions for the key confinement
prevention function.
WIRING DIAGRAM
DI6LR-01

DI-644
- DIAGNOSTICSBODY CONTROL SYSTEM
800 Author
: Date
:
2001 AVALON (RM808U)
INSPECTION PROCEDURE
1 Check door unlock detection switch. (See page BE-82)
NG Replace the door lock motor.
OK
2 Check wireharness and connector between door unlock detection switch and
body ECU. (See page IN-30)
NG Repair or replace wireharness or connector.
OK
Proceed to next circuit inspection shown on
problem symptoms table.
(See page DI-622)

I14523
Body ECU
L-RL-B
L-W 3 L-B
219
IB21
B5ACTD B5 15
ACT-
L-B 10
L-B2
B5ACT+
5
D17
Door Lock Motor
Front LH IB2 L-R
C C
C CL-B
J3
J/C 11
IM2IA1 L-B
5 10 BA1
BB1 L-B
L-BL-BL-R 10
IN1D18
Door Lock Motor
Front RH
11
IN1L-R AA
AA L-R L-R
L-R 13
IA1
L-R
L-RL-B L-R
5
BA1 2 D15
Door Lock Motor
Rear LH D16
Door Lock Motor
Rear RH
1 34
BB112
IM2J2
J/C
5
6A
- DIAGNOSTICSBODY CONTROL SYSTEM
DI-641
797 Author
: Date
:
2001 AVALON (RM808U)
Door lock motor circuit
WIRING DIAGRAM
DI6LQ-01

DI-642
- DIAGNOSTICSBODY CONTROL SYSTEM
798 Author
: Date
:
2001 AVALON (RM808U)
INSPECTION PROCEDURE
1 Check door lock motor. (See page BE-82)
NG Replace the door lock motor.
OK
2 Check wireharness and connector between door lock motor and body ECU.
(See page IN-30)
NG Repair or replace wireharness or connector.
OK
Proceed to next circuit inspection shown on
problem symptoms table.
(See page DI-622)

I14524
RDRL No. 2 Relay
2
22
2 43
1
2R-B R-B8
B410Body ECU
DRL
6
EA1
8
IF1R
2
R-B2
2 1 2 HEAD RH-UPR
HEAD LH-UPR
12
L
10 9
IF1
L L 2 1
G 2
G
GGH2
Headlight High RH
1
2
R-W9
IC1
R-W
2
EA1
G2
22
2
2
2
2 2
21
42
3 DRL No. 4 Relay
DRL No. 3 Relay
12
53
4 W-R
W-R W-R
5W-B
W-B
10
R-L11
W-B W-B
2E 4
1
2E
MAIN
2
2GR-B
21
BatteryFL MAIN1
F6 F71 FL Block
B
to Body ECU5
5
5
5DRL
21
5
HEAD Relay
3
21 4
5
to Headlight
Low LH and RHEA R-L H1
Headlight High LH REngine Room R/B No. 2
Engine Room R/B No. 7R-BEA1
Engine Room R/B No. 2 IF1 EA1
EA1
IF3
EA1
Engine Room J/B
Engine Room R/B No. 5
B
R-B
RW-B R
R
9
EA1
R-W DI-668
- DIAGNOSTICSBODY CONTROL SYSTEM
824 Author
: Date
:
2001 AVALON (RM808U)
Daytime running light No.2, 3 and 4 relay circuit
WIRING DIAGRAM
DI6M3-01

- DIAGNOSTICSBODY CONTROL SYSTEM
DI-669
825 Author
: Date
:
2001 AVALON (RM808U)
INSPECTION PROCEDURE
1 Check D.R.L relay No.2,3 and 4.
NG Replace the D.R.L relay No.2, 3 and4.
OK
2 Check wire harness and connector between D.R.L relay and Body ECU, battery
and D.R.L relay (See page IN-30).
NG Repair or replace wire harness or connector.
OK
Proceed to next circuit inspection shown on
problem symptoms table (See page
DI-622).

I13647
Battery FL
MAINB1
1
F6
F7B 2
21 1MAIN
2E
2G R-BR5
55
5 21 34 Headlight Relay
R-BR-B4
1J8Body ECU
HRLY
5
55 1
21
2 HEAD
RH
LW RHEAD
LH
LW R
3
IF1
G-W
2
1
W-BG-W
*1Headlight
Low RHR-B
2
1H3
Headlight
Low LH
W-B
ED *1 EB: Canada
EA: Except Canada Engine Room J/B
FL Block
H4
Engine Room R/B No. 5
Engine Room R/B No. 5Driver Side J/B
- DIAGNOSTICSBODY CONTROL SYSTEM
DI-635
791 Author
: Date
:
2001 AVALON (RM808U)
Headlight relay circuit
CIRCUIT DESCRIPTION
Head light relay will be ºONº by operating the headlight switch. The transistor which activates the taillight
relay has two sorts: one activates directly by the headlight switch for fail safe and the other activates by CPU.
the one that activates by CPU has two systems and prevents the headlight from turning off at the time of
one system trouble in the automatic operation circuit.
WIRING DIAGRAM
DI6LN-01

DI-636
- DIAGNOSTICSBODY CONTROL SYSTEM
792 Author
: Date
:
2001 AVALON (RM808U)
INSPECTION PROCEDURE
1 Check headlight relay (See page BE-19).
NG Replace the headlight relay.
OK
2 Check wireharness and connector between headlight relay and Body ECU, bat-
tery and headlight relay (See page IN-30).
NG Repair or replace wireharness or connector.
OK
Proceed to next circuit inspection shown on
problem symptoms table (See page
DI-622).