TOYOTA AVALON 2001 Service Repair Manual

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

DI-652
- DIAGNOSTICSBODY CONTROL SYSTEM
808 Author
: Date
:
2001 AVALON (RM808U)
INSPECTION PROCEDURE
1 Check that DTC 42 is not output.
NG Check the RDA line.
OK
2 Check wireharness.
PREPARATION:
Disconnect connectors of wireless door lock tuner and Body ECU.
CHECK:
Check continuity between terminals PRG of wireless door lock tuner and PRG of Body ECU.
OK:
Continuity
NG Repair or replace wireharness.
OK
3 Check the wireless door lock tuner.
CHECK:
Replace the wireless door lock tuner and check if it recovers normally.
OK:
Must be recovered normally.
NG Proceed to next circuit inspection shown on
problem symptoms table (See page DI-622).
OK
Failure of the original wireless door lock tun-
er.

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

DI6LF-01
Customer Problem Analysis
Vehicle Brought to Workshop
Problem Symptom ConfirmationSymptom Simulation Symptom does not
occur
Circuit Inspection
Identification of Problem
Repair
Confirmation Test
EndTitles inside
are titles of pages in this
manual, with the page number indicated in
the bottom portion. See the indicated pages
for detailed explanations.
1
23
65
8P. IN-20
P. DI-718 P.DI-616
P. DI-627 - DI-666
Symptom
occur
Step 6, 8 : Diagnostic steps permitting the use of the
hand-held tester . 7
Multiplex communication system inspection * 4
Problem Symptoms Table
P. DI-622
*: Confirm that there is no trouble by
basic inspection and DTC check
- DIAGNOSTICSBODY CONTROL SYSTEM
DI-615
771 Author
: Date
:
2001 AVALON (RM808U)
BODY CONTROL SYSTEM
HOW TO PROCEED WITH TROUBLESHOOTING
HINT:
This ECU is connected to the multiplex communication system. Therefore, be sure to check that there is no
troubles in the multiplex communication system before performing the trouble shooting.

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

I13586
Front
Personal
Light
Vanity Light
Rear Power
Window Switch Wireless Door
Lock Buzzer
Door Lock Assembly

Door Lock Motor

Door Unlock
Detection Switch
Door Courtesy Light Door Courtesy Switch
Buckle Switch Room Light
Rear Power Seat Switch
Door Lock Assembly

Door Lock Motor

Door Unlock Detection Switch
Door Courtesy Switch
Door Courtesy Light
Luggage Compartment Door
Opener Motor and Courtesy
Switch
Passenger Seat Belt Occupant Detection
Sensor
Wireless Door Lock
Receiver
Park/Neutral Position Switch
DI-618
- DIAGNOSTICSBODY CONTROL SYSTEM
774 Author
: Date
:
2001 AVALON (RM808U)

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

- DIAGNOSTICSBODY CONTROL SYSTEM
DI-623
779 Author
: Date
:
2001 AVALON (RM808U)
HEADLIGHT AND TAILLIGHT SYSTEM (CANADA):
SymptomSuspect AreaSee page
Only one side headlight does not light.
1. Headlight bulb
2. HEAD LWR (LH, RH) fuse
3. Wire harness-
BE-9
IN-30
Headlight does not light.
1. Headlight bulb
2. Headlight control relay circuit
3. Light control switch circuit
4. Wire harness-
DI-635
DI-631
IN-30
ºLo-Beamº does not light.
1. Headlight bulb
2. HEAD LWR (LH, RH) fuse
3. Headlight control relay circuit
4. Headlight dimmer switch
5. Wire harness-
BE-9
DI-635
DI-631
IN-30
ºHi-Beamº does not light.
1. Headlight bulb
2. HEAD UPR (LH, RH) fuse
3. DRL fuse
4. D.R.L. relay No.2, 3 and 4 relay circuit
5. Headlight dimmer switch
6. Wire harness-
BE-9
BE-9
DI-668
DI-631
IN-30
ºFlashº does not light.
1. Headlight bulb
2. HEAD UPR (LH, RH) fuse
3. DRL fuse (R/B No.7)
4. D.R.L. relay No.2, 3 and 4 relay circuit
5. Headlight dimmer switch
6. Wire harness-
BE-9
BE-9
DI-668
DI-631
IN-30
Headlight does not light with engine running and light control SW
OFF.
1. DOME fuse
2. GAUGE fuse
3. DRL fuse
4. Parking brake switch circuit
5. Generator
6. Wire harnessBE-9
BE-9
BE-9
DI-670
CH-9
IN-30
Only one side taillight does not light.1. 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. Taillight bulb
2. Light failure sensor
3. Wire harness-
BE-53
IN-30
AUTO TURN OFF SYSTEM:
SymptomSuspect AreaSee page
ºAuto turn-off systemº does not operate.
1. Drivers door courtesy switch circuit
2. Driver door ECU
3. Multiplex communication circuit
4. Body ECUDI-639
DI-676
DI-718
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