Page 1236 of 1897
DI164-28
- DIAGNOSTICSSUPPLEMENTAL RESTRAINT SYSTEM
DI-361
517 Author: Date:
2001 AVALON (RM808U)
PROBLEM SYMPTOMS TABLE
Proceed with troubleshooting of each circuit in the table below.
SymptomSuspect AreaSee page
With the ignition switch in ACC or ON position, the SRS warning
light sometimes lights up after approx. 6 seconds have elapsed.
SRS warning light is always lit up even when ignition switch is in
the LOCK position.SRS warning light circuitDI-479
With the ignition switch in ACC or ON position, the SRS warning
light does not light up.
DTC is not displayed.
SRS warning light is always lit up at the time of DTC check pro-
cedure.Tc terminal circuitDI-484
DTC is displayed without Tc and E1 terminal connection.
Page 1244 of 1897
I14527
Theft Deterrent ECU
14
IG 2
1
AM1 2
4 3C
AM1 3Ignition Switch
IGY-R
1
ALT FL Block
1
W-B
FL MAIN
BatteryIG1 11
3F18
4H18
4B
13
1B
4
1C Y-R
Y-R
W-R
W-L
W-L7
IF1
1
2G1
2H 5521 3
1B
B-LB F8
F6IG1 RELAY
ECU-IG NO. 2
I15
4
2
T4
Engine Room R/B No. 5
Engine Room J/B Driver Side J/BJ/B No. 3
J/B No. 4
1
1G
F101 W DI-540
- DIAGNOSTICSTHEFT DETERRENT SYSTEM
696 Author: Date:
2001 AVALON (RM808U)
Ignition Switch Circuit
CIRCUIT DESCRIPTION
When the ignition switch is turned to the ACC position, battery positive voltage is applied to the terminal ACC
of the ECU. Also, if the ignition switch is turned to the ON position, battery positive voltage is applied to the
terminals ACC and IG of the ECU. When the battery positive voltage is applied to the terminal ACC of the
ECU while the theft deterrent system is activated, the warning stops. Furthermore, power supplied from the
terminals ACC and IG of the ECU is used as power for the door courtesy switch, and position switch, etc.
WIRING DIAGRAM
DI022-14
Page 1245 of 1897
I14465
ECU-IG Fuse
I11586
14 (IG) (-) (+)
- DIAGNOSTICSTHEFT DETERRENT SYSTEM
DI-541
697 Author: Date:
2001 AVALON (RM808U)
INSPECTION PROCEDURE
1 Check CIG and ECU-IG fuses.
PREPARATION:
(a) Remove the fuse box opening cover.
(b) Remove ECU-IG fuses from instrument panel J/B.
CHECK:
Check continuity of ECU-IG fuses.
OK:
Continuity
NG Check for short in all the harness and compo-
nents connected to the ECU-IG fuses (See at-
tached wiring diagram).
OK
2 Check voltage between terminal IG of theft deterrent ECU and body ground.
PREPARATION:
(a) Disconnect the theft deterrent ECU connectors.
(b) Turn ignition switch ON.
CHECK:
Measure voltage between terminal IG 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 battery (See page
IN-30).
OK
Check and replace theft deterrent ECU.
Page 1248 of 1897
I13630
Theft Deterrent ECU
KSW 4B 12
W-B
W-B2
IG
Key Unlock
Warning Switch
4A2
3D 22
3D9
R-Y R-Y4
T4
U1
J/B No. 3
J/B No. 4 DI-542
- DIAGNOSTICSTHEFT DETERRENT SYSTEM
698 Author: Date:
2001 AVALON (RM808U)
Key Unlock Warning Switch Circuit
CIRCUIT DESCRIPTION
The key unlock warning switch goes ON when the ignition key is inserted in the key cylinder and goes OFF
when the ignition key is removed.
The ECU operates the key confinement prevention function while the key unlock warning switch is ON.
WIRING DIAGRAM
DI6L3-01
Page 1251 of 1897
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
Page 1253 of 1897
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
Page 1256 of 1897
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
Page 1258 of 1897
DI6L0-01
I11668
Door Lock Assembly
Door Lock Motor
Door Unlock Detection
SwitchLuggage Compartment
Door Key Lock and
Unlock Switch
Luggage Compartment Door Lock Motor
Luggage CompartmentDoor Courtesy Switch
Theft Deterrent Horn
Enjine Room Junction Block
HORN Fuse
HORN Relay
Headlight Control Relay
Door Lock Assembly
Door Lock Motor
Door Unlock Detection
Switch
Theft Deterrent ECU
Ignition Switch
Key Unlock Warning Switch
Driver Side Junction Block
DOME Fuse
ECU-IG No.1 Fuse
ECU-IG No.2 Fuse
Taillight Control Relay
Body ECU
Engine Hood Courtesy Switch
Security Indicator
- DIAGNOSTICSTHEFT DETERRENT SYSTEM
DI-529
685 Author: Date:
2001 AVALON (RM808U)
PARTS LOCATION
