2001 TOYOTA AVALON Service Repair Manual

I01663
OFF
ON
1 2
3 4
- DIAGNOSTICSTHEFT DETERRENT SYSTEM
DI-543
699 Author
: Date
:
2001 AVALON (RM808U)
INSPECTION PROCEDURE
1 Check key unlock warning switch.
PREPARATION:
Disconnect key unlock warning switch connector.
CHECK:
Check continuity between terminal 1 and 2 of key unlock warn-
ing switch connector, when the key is inserted to the key cylin-
der or removed.
OK:
Switch positionTester connectionSpecified condition
ON (Key inserted)1 - 2Continuity
OFF (Key removed)-No continuity
NG Replace key unlock warning switch.
OK
2 Check harness and connectors between ECU and key unlock warning switch,
key unlock warning switch and body ground (See page IN-30).
NG Repair or replace harness or connector.
OK
Check and replace theft deterrent ECU.*1
*1: When there is a malfunction that the theft deterrent system cannot be set, proceed to the next numbered
circuit inspection shown in problem symptom table (See page DI-531).

I13629
Theft Deterrent ECU
LGV 3
G-W 1
IK2
G-W 1 Luggage Compartment
Door Key Unlock Switch
W-B2
A
BNJ10
J/C
L6L4 DI-544
- DIAGNOSTICSTHEFT DETERRENT SYSTEM
700 Author
: Date
:
2001 AVALON (RM808U)
Luggage Compartment Door Key Lock and Unlock Switch Circuit
CIRCUIT DESCRIPTION
The luggage compartment door key lock and unlock switch goes ON when the luggage compartment door
key cylinder is turned to the unlock side with the key.
WIRING DIAGRAM
DI024-12

AB0119
I11584
I11584
ON
1
I11585
2
1
- DIAGNOSTICSTHEFT DETERRENT SYSTEM
DI-545
701 Author
: Date
:
2001 AVALON (RM808U)
INSPECTION PROCEDURE
1 Check voltage between terminal 1 of luggage compartment door key lock and
unlock switch connector and body ground.
PREPARATION:
(a) Remove luggage compartment door trim.
(b) Turn ignition switch ON.
CHECK:
Measure voltage between terminal 1 of luggage compartment
door key lock and unlock switch connector and body ground,
when the key is turned to the unlock side and not turned respec-
tively.
OK:
Key operationVoltage
Turned to the unlock side0 V
Not turnedBattery positive voltage
OK Check and replace theft deterrent ECU.*1
NG
2 Check luggage compartment door key lock and unlock switch.
PREPARATION:
Disconnect luggage compartment door key lock and unlock
switch connector.
CHECK:
Check continuity between terminals 1 and 2, when the key is
turned to the unlock side and not turned respectively.
OK:
Key operationTester connectionSpecified condition
Turned to unlock1 - 2Continuity
Not turned-No continuity
NG Repair or replace luggage compartment door
key lock and unlock switch.
OK

DI-546
- DIAGNOSTICSTHEFT DETERRENT SYSTEM
702 Author
: Date
:
2001 AVALON (RM808U)
3 Check harness and connector between theft deterrent ECU and key lock and un-
lock switch, key lock and unlock switch and body ground (See page IN-30).
NG Repair or replace harness or connector.
OK
Check and replace theft deterrent ECU.*1
*1: When there is a malfunction that the theft deterrent system cannot be set, proceed to the next numbered
circuit inspection shown on problem symptom table (See page DI-531).

I13632
Theft Deterrent ECU
SH- 25 5
1 2
7
FL Block
FL MAIN
Battery11HORN
F7 F6IF3 2C
2G
BB-RSH 24
BT4
T2
Theft
Deferrent
HornW Driver Side J/B
B-R
- DIAGNOSTICSTHEFT DETERRENT SYSTEM
DI-537
693 Author
: Date
:
2001 AVALON (RM808U)
Theft Deterrent Horn Circuit
CIRCUIT DESCRIPTION
When the theft deterrent system is activated, the relay in the ECU turns ON and OFF cycles of approximately
0.2 sec., causing the theft deterrent horn to blow (See the wiring diagram below).
In this condition, if any of the following operations is done, the relay in the ECU turns OFF, thus stopping
the theft deterrent horn from blowing:
(1) Unlock the front LH or RH door with key.
(2) Turn the ignition switch to ACC or ON position.
(3) Unlock the doors with the wireless door lock control system.
(4) Wait for approximately 60 seconds.
(5) Push the panic switch of the wireless door lock control system.
WIRING DIAGRAM
DI6L2-01

I11588
(-) (+)
24 (SH)
I11582
(-) (+)
1
DI-538
- DIAGNOSTICSTHEFT DETERRENT SYSTEM
694 Author
: Date
:
2001 AVALON (RM808U)
INSPECTION PROCEDURE
HINT:
The flow chart below is based on the premise that the horns blow normally whenever the horn switch is oper-
ated. If horn operation is not normal when the horn switch is operated, check the horn switch.
1 Check voltage between terminal SH of theft deterrent ECU connector and body
ground.
PREPARATION:
Disconnect the theft deterrent ECU connectors.
CHECK:
Measure voltage between terminal SH of theft deterrent ECU
connector and body ground.
OK:
Voltage: 10 - 14 V
NG Check and repair harness and connector be-
tween theft deterrent ECU and horn relay.
OK
2 Check voltage between terminal 1 of theft deterrent horn connector and body
ground.
PREPARATION:
Remove the theft deterrent horn and disconnect the connector.
CHECK:
Measure voltage between terminal 1 of theft deterrent horn
connector and body ground.
OK:
Voltage: 10 - 14 V
NG Check and repair harness and connector be-
tween HORN fuse and theft deterrent horn.
OK

I11583
(-)
1 (+)
- DIAGNOSTICSTHEFT DETERRENT SYSTEM
DI-539
695 Author
: Date
:
2001 AVALON (RM808U)
3 Check theft deterrent horn.
CHECK:
Connect positive (+) lead to terminal 1 and negative (-) lead to
ground to theft deterrent horn connector.
OK:
Theft deterrent horn blows.
NG Replace theft deterrent horn.
OK
4 Check harness and connector between theft deterrent ECU and theft deterrent
horn (See page IN-30).
NG Check and repair harness or connector.
OK
Check and replace theft deterrent ECU.

DI01Q-10
THEFT DETERRENT SYSTEM Check Sheet
Inspector 's name:
Customer 's Name
Date of VehicleRegistration No.
Registration Year
Frame No.
Odometer Reading / /km
Mile
Weather Conditions
When Problem
Occurred Frequency Problem OccursWeather
Outdoor temperature
/ /

Constant
Sometimes ( Times per day, month)

Once only Brought in

Theft deterrent system cannot be set.

Indicator light does not flash when the theft deterrent system is set.
(It stays on or does not light at all.)

Theft deterrent system
does not operate.
When unlocked using the
door lock knob.

When the engine hood is
opened.

System cannot be
canceled once set.
When door is unlocked using key or wireless door lock control system.

When the key is inserted in the ignition key cylinder and turned to ACC or ON
position.
(However, only when the system has never operated)

When the luggage compartment door is opened with the key.

System cannot be
canceled during warning
operation.
When door is unlocked using key or wireless door lock control system.

When the key is inserted in the ignition key cylinder and turned to ACC or ON
position.

Warning operation starts when the system is set and the door or luggage compartment door is opened with
the key.

Others.
Date Problem First Occurred

Fine
Cloudy
Rainy
Snowy

Various/Others

Hot
Warm
Cool

Cold (Approx. 5F ( 5C))
Problem Symptom
Malfunction

Horns only

Theft deterrent horn only

Headlights only

Taillights only

Starter cut only

Door lock operation only
DI-518
- DIAGNOSTICSTHEFT DETERRENT SYSTEM
674 Author
: Date
:
2001 AVALON (RM808U)
CUSTOMER PROBLEM ANALYSIS CHECK