2001 TOYOTA AVALON Service Repair Manual

DI-646
- DIAGNOSTICSBODY CONTROL SYSTEM
802 Author
: Date
:
2001 AVALON (RM808U)
INSPECTION PROCEDURE
1 Check the power window switch. (See page BE-73)
NG Replace the power window switch.
OK
2 Check wireharness and connector between power window switch and Body
ECU. (See page IN-30)
NG Repair or replace wireharness or connector.
OK
3 Check wireharness and connector between power window switch and power
window master switch. (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)

I13638
Battery FL MAIN
B 1 1
ALT
F10 F6 W111 STOP
1G 1D
R2
S4
Stop Light Switch
1
G-W3
1D11
STOP Engine Room J/BBody ECU
Engine
Room J/B DI-662
- DIAGNOSTICSBODY CONTROL SYSTEM
818 Author
: Date
:
2001 AVALON (RM808U)
Stop light switch circuit
CIRCUIT DESCRIPTION
The Body ECU is detecting the condition of the stop light switch.
WIRING DIAGRAM
DI6M0-01

- DIAGNOSTICSBODY CONTROL SYSTEM
DI-663
819 Author
: Date
:
2001 AVALON (RM808U)
INSPECTION PROCEDURE
1 Check stop light switch. (See page BE-36)
NG Replace the stop light switch.
OK
2 Check wireharness and connector between stop light switch and Body ECU, bat-
tery and stop light switch (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).

I13646
FL Block
11
F6 F10
B
FL MAINALT
BatteryW1
1GTAIL RELAY
53
12
to Taillight9Body ECU
TRLY Driver Side J/B
- DIAGNOSTICSBODY CONTROL SYSTEM
DI-633
789 Author
: Date
:
2001 AVALON (RM808U)
Taillight relay circuit
CIRCUIT DESCRIPTION
Taillight relay will be ºONº by operating the taillight switch. The transistor which activates the tail light relay
has two sorts: one activates by the tail light switch for fail safe and the other activates by CPU.
WIRING DIAGRAM
DI6LM-01

DI-634
- DIAGNOSTICSBODY CONTROL SYSTEM
790 Author
: Date
:
2001 AVALON (RM808U)
INSPECTION PROCEDURE
1 Check taillight relay (See page BE-19).
NG Replace the taillight relay.
OK
2 Check wireharness and connector between taillight relay and Body ECU, battery
and taillight 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).

I13656
IJJ9
J/C AW-B1W6
Wireless Door
Lock Buzzer
Buzzer2
P-L20
B4Body ECU
BZ
- DIAGNOSTICSBODY CONTROL SYSTEM
DI-653
809 Author
: Date
:
2001 AVALON (RM808U)
Wireless door lock buzzer circuit
WIRING DIAGRAM
DI6LW-01

DI-654
- DIAGNOSTICSBODY CONTROL SYSTEM
810 Author
: Date
:
2001 AVALON (RM808U)
INSPECTION PROCEDURE
1 Check wireless door lock buzzer. (See page BE-91)
NG Replace the wireless door lock buzzer.
OK
2 Check wireharness and connector between wireless door lock buzzer and Body
ECU, Body ECU and wireless door lock buzzer (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).

I13655
W-B88
4F 4E
W-B1
2 D8
Wireless Door
Control Receiver
L-WL-W 9
IK221Body ECU
B4 RDA RDA
E
PRG
+B
P-L1
1
4D
4E
P-L5320
G-R G-R7
B4 PRG
B
BJ6
J/C
II7
1D
FL
MAIN DOME
9
1J
W-L
2
2G 2C1
B
1
1
F7 F6
BBattery J/B No. 4
J/B No. 4
IK2
Driver Side J/B
DCC Engine Room J/B
FL Block W-B
- DIAGNOSTICSBODY CONTROL SYSTEM
DI-651
807 Author
: Date
:
2001 AVALON (RM808U)
Wireless door lock tuner circuit
CIRCUIT DESCRIPTION
The signal from the transmitter will be input to the body ECU through RDA line. RDA line is diagnosed by
the Body ECU, so check DTC also in case of the failure of the wireless function.
WIRING DIAGRAM
DI6LV-01