2005 TOYOTA AVENSIS warning

B67694
IG
10 CK CA
Instrument Panel J/B AssyR±W
1 21
3
IG1 AM1
Battery B*
2
G±R
DH1
AM1T6
Theft Warning ECU Assy
Center J/B Assy
7
R±W
I13
Ignition Switch
Assy1G±Y
Main 3 3
4D 4BB±G*
1B±G*1
W*2
1 DA9
1 5 3 GAUGE1
IG1
Relay
ED1 DN DH 5 1DB
7
ALT
ALT Engine Room R/B No. 3
*
1: Gasoline
*2: 1CD±FTV1 B±L*
2
IJ W±B
21
21 Engine Room J/B No. 4
± DIAGNOSTICSTHEFT DETERRENT SYSTEM
05±1639
AVENSIS REPAIR MANUAL (RM1018E)
IGNITION SWITCH CIRCUIT
CIRCUIT DESCRIPTION
When the ignition switch is turned to the ON position, battery positive voltage is applied to terminal IG of the
theft warning ECU.
WIRING DIAGRAM
05BAD±01

B63408
Wire Harness Side
T6
Theft Warning ECU Assy
± DIAGNOSTICSTHEFT DETERRENT SYSTEM
05±1641
AVENSIS REPAIR MANUAL (RM1018E)
4 CHECK THEFT WARNING ECU ASSY (POWER SOURCE)
(a) Disconnect the T6 ECU connector.
(b) Check the voltage between the wire harness side con-
nector and body ground.
Standard:
Tester ConnectionSwitch PositionSpecified Condition
T6±10 (IG) ±
Body groundIgnition switch ON10 to 14 V
NG REPAIR OR REPLACE HARNESS AND
CONNECTOR
OK
REPLACE THEFT WARNING ECU ASSY

B67693
+B1
E W±R B±W
1A5
3DCCEngine Room R/B 1IP1
B*
2
BatteryJ/C
IPW±B
29 Center J/B 6T6
Theft Warning ECU Assy
CG 6J26 W±R
J27 6 Fuse Block
DOME
B±W
34A
4B B±G*
1
B±G*1B*2
3.0W Engine
Room R/B
No. 3CA W±B9
*
1: Gasoline
*2: 1CD±FTV 2 1
1 2
1
1FH
2
Engine
Room J/B
No. 4
± DIAGNOSTICSTHEFT DETERRENT SYSTEM
05±1637
AVENSIS REPAIR MANUAL (RM1018E)
ECU POWER SOURCE CIRCUIT
CIRCUIT DESCRIPTION
This circuit provides power to operate the theft warning ECU.
WIRING DIAGRAM
05BAC±01

B63408
Wire Harness Side
T6
Theft Warning ECU Assy
B63408
Wire Harness Side
T6
Theft Warning ECU Assy
05±1638
± DIAGNOSTICSTHEFT DETERRENT SYSTEM
AVENSIS REPAIR MANUAL (RM1018E)
INSPECTION PROCEDURE
1 INSPECT FUSE (DOME, DCC)
(a) Remove the DCC fuse from the engine room R/B.
(b) Remove the DOME fuse from the fuse block.
(c) Check the resistance.
Standard: Resistance
NG REPLACE FUSE
OK
2 CHECK THEFT WARNING ECU ASSY (POWER SOURCE)
(a) Disconnect the T6 ECU connector.
(b) Check the voltage between the wire harness side con-
nector and the body ground.
Standard:
Tester ConnectionSpecified Condition
T6±2 (+B1) ± Body ground10 to 14 V
NG REPAIR OR REPLACE HARNESS AND
CONNECTOR
OK
3 CHECK WIRE HARNESS (THEFT WARNING ECU ASSY ± BODY GROUND)
(a) Disconnect the T6 ECU connector.
(b) Check the resistance between the wire harness side con-
nector and the body ground.
Standard:
Tester ConnectionSpecified Condition
T6±29 (E) ± Body groundBelow 1

NG REPAIR OR REPLACE HARNESS AND
CONNECTOR
OK
REPLACE THEFT WARNING ECU ASSY

B67692
T6
Theft Warning ECU Assy
IND
25 W±B
1LSecurity A J16
J/C
18V F19
Rear Window Defogger
Switch Assy
(Security Indicator)
B67862
± DIAGNOSTICSTHEFT DETERRENT SYSTEM
05±1635
AVENSIS REPAIR MANUAL (RM1018E)
SECURITY INDICATOR CIRCUIT
CIRCUIT DESCRIPTION
Even in the disarmed state, the security indicator flashes due to a signal output from the immobiliser system.
The security indicator always flashes when it receives a signal from the immobiliser system at any time in
the armed state.
The theft warning ECU causes the security indicator to light up or blink only during the customizing function
mode or the add mode of the transmitter.
WIRING DIAGRAM
INSPECTION PROCEDURE
1 CHECK REAR WINDOW DEFOGGER SWITCH ASSY (SECURITY INDICATOR)
(a) Remove the defogger switch.
(b) Apply 12 V positive voltage between each terminal of the
defogger switch connector, and check the lighting condi-
tion of the security indicator.
Standard:
Measurement ConditionSpecified Condition
Battery positive (+)
Terminal 8
Battery negative (±)
Terminal 1Lights up
NOTICE:

If the positive (+) lead and the negative (±) lead are in-
correctly connected, the security indicator does not
light up.

Voltage of more than 12 V will damage the security in-
dicator.

If the voltage is too low, the security indicator does
not light up.
05BAB±01



B68490
Wire Harness Side
T6
Theft Warning ECU Assy
F19
Rear Window Defogger Switch Assy
B67863
Wire Harness Side
F19
Rear Window Defogger Switch Assy
05±1636
± DIAGNOSTICSTHEFT DETERRENT SYSTEM
AVENSIS REPAIR MANUAL (RM1018E)
NG REPLACE REAR WINDOW DEFOGGER
SWITCH ASSY
OK
2 CHECK WIRE HARNESS (THEFT WARNING ECU ASSY ± REAR WINDOW DEFOG-
GER SWITCH ASSY (SECURITY INDICATOR))
(a) Disconnect the T6 ECU and F19 switch connectors.
(b) Check the resistance between the wire harness side con-
nectors.
Standard:
Tester ConnectionSpecified Condition
T6±25 (IND) ± F19±7Below 1

NG REPAIR OR REPLACE HARNESS AND
CONNECTOR
OK
3 CHECK WIRE HARNESS (REAR WINDOW DEFOGGER SWITCH ASSY (SECURITY
INDICATOR) ± BODY GROUND)
(a) Disconnect the F19 switch connector.
(b) Check the resistance between the wire harness side con-
nector and the body ground.
Standard:
Tester ConnectionSpecified Condition
F19±1 ± Body groundBelow 1

NG REPAIR OR REPLACE HARNESS AND
CONNECTOR
OK
REPLACE THEFT WARNING ECU ASSY

05BAA±01
05±1634
±
DIAGNOSTICS THEFT DETERRENT SYSTEM
AVENSIS REPAIR MANUAL (RM1018E)
PROBLEM SYMPTOMS TABLE
Proceed to the reference page shown in the table below for each malfunction sym\
ptom and troubleshoot
each circuit.
HINT:
Troubleshooting of the theft deterrent system is based on the premise that the door loc\
k control system and
the wireless door lock control system are operating normally. Accordingly, before troubleshooting the theft
deterrent system, first make certain that the door lock control system and the wireless door lock control sys-
tem are operating normally.
SymptomSuspected AreaSee Page
Theft deterrent system cannot be set
1. Security indicator circuit
2. ECU power source circuit
3. Unlock warning switch circuit
4. Door key lock and unlock switch
5. Luggage compartment door key lock and unlock switch (Sedan)
6. Back door key lock and unlock switch (Liftback, Wagon)
7. Door courtesy switch circuit
8. Luggage compartment door courtesy switch circuit (Sedan)
9. Back door courtesy switch circuit (Liftback, Wagon)
10.Engine hood courtesy switch circuit05±1635
05±1637
05±1594 73±3
73±3
73±3
05±1631
05±1631
05±1631
05±1642
Security indicator does not blink when theft deterrent system is
set1. Security indicator circuit05±1635
Alarm sounding state is not canceled when ignition switch is
turned ON±OFF 10 times within 15 seconds1. Ignition switch circuit
2. Unlock warning switch circuit05±1639
05±1594
Theft deterrent system can be set even when any door is open
1. Door courtesy switch circuit
2. Luggage compartment door courtesy switch circuit (Sedan)
3. Back door courtesy switch circuit (Liftback, Wagon)05±1631
05±1631
05±1631
Horns (low pitched, high pitched) do not sound while theft deter-
rent system is in warning operation1. Horn (low pitched, high pitched) circuit05±1644
Hazard warning lamps do not flash while theft deterrent system is
in warning operation1. Hazard warning circuit65±5
Room lamp does not flash while theft deterrent system is in warn-
ing operation1. Room lamp circuit65±5
Theft warning siren sounds even when theft deterrent system is
not set1. Theft warning siren circuit05±1647
Hazard warning lamps flash even when theft deterrent system is
not set1. Hazard warning switch circuit65±5
Room lamp flashes even when theft deterrent system is not set1. Room lamp circuit65±5
Theft warning siren sounds even when theft deterrent system is
not set1. Theft warning siren circuit05±1647
Intrusion (theft warning) sensor does not detect any moving object
while theft deterrent system is set1. Instrution sensor circuit05±1650
Intrusion (theft warning) sensor sets off alarm while theft deterrent
system is not set or there is nothing moving inside vehicle with
theft deterrent system set
1. Intrusion sensor circuit05±1650
Intrusion (theft warning) sensor OFF switch does not operate1. Intrusion sensor circuit05±1650
Intrusion (theft warning) sensor OFF switch continues operating1. Intrusion sensor circuit05±1650

05BA9±01
B50657
T6
± DIAGNOSTICSTHEFT DETERRENT SYSTEM
05±1631
AVENSIS REPAIR MANUAL (RM1018E)
TERMINALS OF ECU
1. CHECK THEFT WARNING ECU ASSY
(a) Disconnect the T6 ECU connector.
(b) Check the voltage or resistance of each terminal of the wire harness side connector.
Standard:
Symbols (Terminal No.)Wiring ColorConditionSpecified Condition
+B1 (T6±2) ± E (T6±29)W±R ± W±BConstant10 to 14 V
E (T6±29) ± Body groundW±B ± Body groundConstantBelow 1

IG (T6±10) ±
Body groundR±W ± Body groundIgnition switch OFF
ON0 V
10 to 14 V
DSWH (T6±34) ±
Body groundL±R ± Body groundEngine hood CLOSED
OPEN10 k
or higher

Below 1

If the result is not as specified, there may be a malfunction on the wire harness side.
(c) Reconnect the T6 ECU connector.
(d) Check the voltage between each terminal of the connector and the body ground.
Standard:
Symbols (Terminal No.)Wiring ColorConditionSpecified Condition
IND (T6±25) ±
Body groundV ± Body ground
Security indicator light lights up
(It lights up only for 30 sec. in alarm sounding state
It flashes when imobiliser system is operating)
3 to 6 V
HORN (T6±5) ±
Body groundG ± Body groundArmed state
Alarm sounding state0 V
10 to 14 V
CTLS (T6±27) ±
Body groundL±R ± Body groundSelf±power siren is souding
(Theft deterrent system is in alarm sounding state)5 V
S+B (T6±24) ± L W Body groundArming preparation state or armed state10 to 14 VS+B (T6 24)
Body groundL±W ± Body groundDisarmed stateBelow 1 V
IOUT (T6 26)No moving object detected by sensor10 to 14 VIOUT (T6±26) ±
Body groundL±B ± Body groundMoving object detected by sensor during arming preparation
state or armed statePulse generation
If the result is not as specified, the ECU may have a malfunction.