2001 TOYOTA AVALON warning

DI-638
- DIAGNOSTICSBODY CONTROL SYSTEM
794 Author
: Date
:
2001 AVALON (RM808U)
INSPECTION PROCEDURE
1 Check key unlock warning switch (See page BE-16).
NG Replace the key unlock warning switch.
OK
2 Check wireharness and connector between key unlock warning 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).

I13658
*1 *2
*2 *1*2
W-B
11
*1
*1
W-B
21 B9
Buckle Switch RH
2
*2
A
J10
J/CBN6
GG
*1BD1
IM26
*2
G17
B5
GBody ECU
1 S11Seat Belt
Warning Occupant
Detection Sensor
R-W 8
BD12
W-R4
B5
*2
PBKL
SEAT
*1: w/ Sliding Roof
*2: w/o Power Seat
*1IM2 BD1
W-B
W-B
W-BW-B
*1
W-R W-R DI-660
- DIAGNOSTICSBODY CONTROL SYSTEM
816 Author
: Date
:
2001 AVALON (RM808U)
Passenger buckle switch and seat belt warning occupant detec-
tion sensor
CIRCUIT DESCRIPTION
This circuit detects the conditions of the passenger buckle switch and the seat belt warning occupant detec-
tion sensor, and makes the passenger seat belt warning flash.
WIRING DIAGRAM
DI6LZ-01

- 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)

DI6LG-01
BODY CONTROL SYSTEM Check Sheet
Inspector 's name:
Customer 's Name
Date VehicleRegistration No.
Registration Year
Frame No.
Odometer Reading / /km
Mile
Weather Conditions
When Problem
Occurred
Date Problem First Occurred
Frequency Problem Occurs
Weather
/ /
Once only Brought in
Key Unlock Warning System
Malfunction
System
Outdoor Temperature
Fine Cloudy Rainy Snowy
Various/ Others
Hot Warm Cool
Cold (Approx. °F ( °C))
Constant Sometimes ( times per day, month)
Illuminated Entry System
Seat Belt Warning
Power Window Control System
Power Door Lock Control System
Wireless Door Lock Control System
Others (Buzzer etc.)
Automatic Light Control System
Luggage Compartment Door Opener System
Headlight and Taillight System (Light Auto Turn-of f system Daytime Running Light
System)
Combination Meter
Auto Lock/Unlock System
Theft Deterrent System DI-616
- DIAGNOSTICSBODY CONTROL SYSTEM
772 Author
: Date
:
2001 AVALON (RM808U)
CUSTOMER PROBLEM ANALYSIS CHECK

DI6LH-01
I11666
Engine Room Junction Block

Headlight Control Relay
Light Control Switch
Luggage Compartment Door
Opener Switch
DLC3
Ignition Switch

Key Unlock Warning Switch
Instrument Panel Junction Block

Body ECU

DOME Fuse
- DIAGNOSTICSBODY CONTROL SYSTEM
DI-617
773 Author
: Date
:
2001 AVALON (RM808U)
PARTS LOCATION

DI6LJ-01
DI-622
- DIAGNOSTICSBODY CONTROL SYSTEM
778 Author
: Date
:
2001 AVALON (RM808U)
PROBLEM SYMPTOMS TABLE
IGNITION SWITCH AND KEY UNLOCK WARNING SWITCH:
SymptomSuspect AreaSee page
Ignition switch is not set to each position.1. Ignition switch
2. Power source circuitBE-16
DI-627
Key unlock warning system does not operate.
(The buzzer does not sound when the driver's door is opened with
the ignition OFF and key inserted)
1. Power source circuit
2. Key unlock warning switch circuit
3. Door courtesy switch circuit
4. Driver door ECU
5. Multiplex communication circuit
6. Body ECU
7. Wire harnessDI-627
DI-637
DI-639
DI-676
DI-718
IN-30
IN-30
Key unlock warning system does not operate.
(The buzzer sounds when the ignition key is ACC or ON)1. Ignition switch
2. Power source circuit
3. Wire harnessBE-16
DI-627
IN-30
HEADLIGHT AND TAILLIGHT SYSTEM (USA):
SymptomSuspect AreaSee page
Only one side headlight does not light.
1. HEAD-(LH, RH) fuse
2. Headlight bulb
3. Wire harnessBE-9
-
IN-30
Headlight does not light.
1. HEAD-(LH, RH) fuse
2. Headlight control relay circuit
3. Light control switch circuit
4. Headlight bulb
5. Wire harnessBE-9
DI-635
DI-631
-
IN-30
ºLo-Beamº does not light.
1. Headlight bulb
2. Headlight dimmer switch
3. Light control switch circuit
4. Wire harness-
DI-631
DI-631
IN-30
ºHi-Beamº does not light.
1. Headlight bulb
2. Headlight dimmer switch
3. Light control switch circuit
4. Wire harness-
DI-631
DI-631
IN-30
ºFlashº does not light.1. Headlight dimmer switch
2. Wire harnessDI-631
IN-30
Only one side taillight does not light.1. Taillight bulb
2. Wire harness-
IN-30
Taillight does not light.
1. TAIL fuse
2. Taillight control relay circuit
3. Light control switch circuit
4. Body ECU
5. Wire harnessBE-9
DI-633
DI-631
IN-30
IN-30
Rear Combination light does not light.
1. Bulb
2. Light failure sensor
3. Wire harness-
BE-53
IN-30

DI-624
- DIAGNOSTICSBODY CONTROL SYSTEM
780 Author
: Date
:
2001 AVALON (RM808U)
INTERIOR LIGHT SYSTEM:
SymptomSuspect AreaSee page
Only one light does not light up.1. Bulb
2. Wire harness-
IN-30
Room light does not light up (All).
1. DOME fuse
2. Body ECU
3. Wire harnessBE-9
IN-30
IN-30
Room light does not light up (Room light only).
1. Bulb
2. Room light assembly
3. Wire harness-
BE-31
IN-30
ºIlluminated Entry Systemº does not operate.
1. Illumination circuit
2. Door courtesy switch circuit
3. Door unlock detection switch circuit
4. Body ECU
5. Wire harnessDI-655
DI-639
DI-643
DI-686
DI-708
IN-30
IN-30
Front personal light does not light up.
1. Bulb
2. Front personal light
3. Body ECU
4. Wire harness-
BE-31
IN-30
IN-30
Rear personal light does not light up.1. Bulb
2. Rear personal light-
BE-31
Vanity light does not light up.
1. Bulb
2. Vanity light
3. Wire harness-
BE-31
IN-30
Luggage room light does not light up.
1. Bulb
2. Luggage compartment light
3. Luggage compartment door courtesy switch circuit
4. Body ECU
5. Wire harness-
BE-31
BE-31
IN-30
IN-30
COMBINATION METER:
SymptomSuspect AreaSee page
Seat Belt warning light does not light up.
1. Warning light bulb
2. Buckle switch circuit
3. Body ECU
4. Meter circuit plate
5. Wire harnessBE-43
BE-53
IN-30
BE-43
IN-30
Open Door warning light does not light up.
1. DOME fuse
2. Warning light bulb
3. Door courtesy switch circuit
4. Illumination circuit
5. Meter circuit plate
6. Wire harnessBE-9
BE-43
DI-639
DI-655
BE-43
IN-30

- DIAGNOSTICSBODY CONTROL SYSTEM
DI-625
781 Author
: Date
:
2001 AVALON (RM808U)
POWER WINDOW CONTROL SYSTEM:
SymptomSuspect AreaSee page
All power window system does not operate.
1. Power main relay
2. Driver door control system
3. Passenger door control systemBE-73
DI-676
DI-677
Driver door window system dose not operate.
1. Driver door control ECU
2. Door lock motor circuit (Driver)
3. Body ECU
4. Wire harnessDI-692
DI-692
DI-641
-
Passenger door window system dose not operate.
1. Passenger door control ECU
2. Door lock motor circuit (Passenger)
3. Body ECU
4. Wire harnessDI-714
DI-714
DI-641
-
Rear power window control system does not operate.
(Both left and right)1. Body ECU
2. Wire harnessIN-30
IN-30
Rear power window control system does not operate.
(Only one side)1. Rear power window switch circuit
2. Body ECU
3. Wire harnessDI-645
IN-30
IN-30
POWER DOOR LOCK CONTROL SYSTEM:
SymptomSuspect AreaSee page
ºDoor lock systemº does not operate at all.
1. GAUGE Fuse
2. DOOR Fuse
3. Driver door control ECU
4. Body ECU
5. Wire Harness-
-
DI-676
IN-30
-
Door lock system does not operate by manual switch.
1. Driver door control ECU
2. Body ECU
3. Wire HarnessDI-676
IN-30
-
Door lock system does not operate by door key.
1. Door Key Lock and Unlock Switch circuit
2. Body ECU
3. Wire Harness
4. Door Lock Link DisconnectedDI-637
IN-30
-
-
Fault in 2-Operation unlock function of Driver's side door key lock
and unlock switch.1. Door Key Lock and Unlock Switch circuit
2. Body ECU
3. Wire HarnessDI-637
IN-30
-
Only one door lock does not operate.1. Door Lock Motor circuit
2. Wire HarnessDI-641
-
Key confinement prevention function does not operate.
1. Key unlock warning switch circuit
2. Driver door control system
3. Passenger door control systemDI-637
DI-676
DI-677
Auto lock/unlock system does not operate.
1. Door lock motor circuit
2. Driver door control system
3. Passenger door control systemDI-641
DI-676
DI-677
LUGGAGE COMPARTMENT DOOR OPENER SYSTEM:
SymptomSuspect AreaSee page
Luggage compartment door opener system does not operate.
1. Luggage door switch circuit
2. Luggage door motor circuit
3. Body ECUDI-647
DI-649
IN-30