horn TOYOTA AVENSIS 2003 Service Service Manual

69065±02
69±2
±
COMMUNICATION SYSTEMHORN SYSTEM
AVENSIS REPAIR MANUAL (RM1018E)
PROBLEM SYMPTOMS TABLE
SymptomSuspected AreaSee Page
Horn does not sound
1. Horn button switch
2. High pitched horn
3. Low pitched horn
4. HORN fuse
5. HORN relay
6. Wire harness±
69±3
69±3
69±3 ±
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69066±02
B67416
B67417
B68374
21
5
3
±
COMMUNICATION SYSTEM HORN SYSTEM
69±3
AVENSIS REPAIR MANUAL (RM1018E)
INSPECTION
1. INSPECT LOW PITCHED HORN ASSY
(a) Check operation of the horn.
Standard:
Measurement ConditionSpecified Condition
Battery positive (+) Terminal 1
Battery positive (±) Horn bodyHorn sounds
If the result is not as specified, replace the horn assy.
2. INSPECT HIGH PITCHED HORN ASSY
(a) Check operation of the horn.
Standard:
Measurement ConditionSpecified Condition
Battery positive (+) Terminal 1
Battery positive (±) Horn bodyHorn sounds
If the result is not as specified, replace the horn assy.
3. INSPECT HORN RELAY ASSY
(a) Remove the HORN relay from the engine room R/B No.
2.
(b) Check the horn relay resistance.
Standard:
Tester ConnectionSpecified Condition
10 k
or higher
3 ± 5Below 1

(When battery voltage is applied to terminals 1 and 2)
If the result is not as specified, replace the relay assy.
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69068±02
B67411
69±4
±
COMMUNICATION SYSTEM LOW PITCHED HORN ASSY
AVENSIS REPAIR MANUAL (RM1018E)
LOW PITCHED HORN ASSY
REPLACEMENT
1. REMOVE LOW PITCHED HORN ASSY
(a) Disconnect the connector.
(b) Remove the bolt and horn. 2. INSTALL LOW PITCHED HORN ASSY
(a) Place the stay onto the baffle part in the radiator supportupper, and then install the horn with the bolt.
Torque: 20 N
m (204 kgf
cm, 15 ft
lbf)
(b) Connect the connector.
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B66038
Heater to Register Duct No.2Instrument Panel Lower AssyCowl Side Trim
Board RHFront Door
Scuff Plate
RH
Floor Shift
Shift Lever
Knob Sub±assy
Console Panel
Sub±assy Upper
Console Panel Sub±assy LowerConsole Box Assy RR
Front Door
Scuff Plate LH Cowl Side Trim
Board LH
Instrument Panel Airbag Assy Console Rear End
Panel
Radio Receiver
Assembly w/ Bracket
Windshield
Wiper Switch Assy
Instrument Panel
Hole Cover Head lamp
Dimmer Switch Assy
Instrument Panel Under
Cover Sub±assy No.2
Horn Button Assy
Steering Wheel Assy
Instrument Panel Under Cover
Sub±assy No.1
H
N´m (kgf´cm, ft´lbf) : Specified torque M/T Transaxle:
A/T Transaxle:
A/T Only:
M/T Only:
50 (510, 37)
8.8 (90, 78 in.´lbf)
orEF
D
B
B or
EF
I
or
EF
or
EF
H
HH
H
H
HH
H
H
CC
CC
H
H Console Panel
Sub±assy Upper
18 (184, 13)
18 (184, 13)
71±8
±
INSTRUMENT PANEL/METER INSTRUMENT PANEL/METER
AVENSIS REPAIR MANUAL (RM1018E)
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730G8±01
±
THEFT DETERRENT & DOOR LOCK THEFT DETERRENT SYSTEM
73±31
AVENSIS REPAIR MANUAL (RM1018E)
THEFT DETERRENT SYSTEM
ON±VEHICLE INSPECTION
1. OUTLINE OF THEFT DETERRENT SYSTEM
(a) When the theft deterrent system detects that the vehicle is being tampered with, the sy\
stem sets off
the alarm, causing the horns to sound and the lights to light up or blink in order to alert\
people around
the vehicle to the theft.
(b) The theft deterrent system has an active arming mode; a disarmed state, an \
arming preparation state,
an armed state and an alarm sounding state.
(1) Disarmed state:

The alarm function is not operating.

The theft deterrent system is not operating.
(2) Arming preparation state:

The time until the system goes into the armed state.

The theft deterrent system is not operating.
(3) Armed state:

The theft deterrent system is operating.
HINT:
If the vehicle remains in a condition that sets off the alarm (any door remains open, engine hood remains
open, ignition switch remains directly connected) after the alarm ends,\
the alarm will be set off repeatedly
a maximum of 10 times for every one of the above specified conditions. Alarm time: Approx. 27.5 sec. x 10
(4) Alarm sounding state:When the theft deterrent system detects that the vehicle is being tampered w\
ith while in the
armed state, the system causes the horns to sound and the lights to light up or blink in order t\
o
alert people around the vehicle to the theft.
Refer to table below for alarm method and time:
Hazard Warning LampBlinking (Cycle of flasher relay)
Alarm MethodRoom LampIlluminatingAlarm MethodVehicle HornSounding (Cycle of 0.4 sec.)
Self±power SirenSounding (Cycle of 0.4 sec.)
Alarm TimeApprox. 27.5 sec. (Maximum 10 times)
HINT:
If any of the doors are unlocked with no key in the ignition key cylinde\
r during the armed state, a forced door
lock signal will be output (See step 3).
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Alarm sounding state
Performing the following will cause the
system to return to disarmed state. When the system detects tam-
pering, horns sound and lights
illuminate or blink in order to
alert people around the vehicle
to the theft.
After approx. 27.5 sec., alarm
stops and system returns to
armed state.
Armed state
Performing any of the following will
cause the system to return to dis-
armed state. Performing any of the follow-
ing will cause the system to
go into alarm sounding state.
Alarm sounding state is canceled. Tampering is detected.
Alarm stops and system
returns to armed state.
Continued from previous page
Continued on previous page

Insert key into ignition key cylin-
der, turn ignition switch ON and
run engine over 550 rpm for 10
to 12 sec.

Unlock all doors by wireless op-
eration. Directly connect ignition
switch without key (or turn
ignition switch ON without
key).


Open engine hood.

Reconnect battery.

Open any door.



Unlock all doors by wireless operation.
±
THEFT DETERRENT & DOOR LOCK THEFT DETERRENT SYSTEM
73±33
AVENSIS REPAIR MANUAL (RM1018E)
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AVENSIS (EWD526E)9
B
The
”Current Flow Chart” section, describes which parts each power source (fuses, fusible links\
, and circuit breakers)
transmits current to. In the Power Source circuit diagram, the condition\
s when battery power is supplied to each system
are explained. Since all System Circuit diagrams start from the power so\
urce, the power source system must be fully
understood.
ACC
S 2 6
6
5 2
22
Battery 30A AM2
Starter Short Pin
100A ALT
Fusible Link Block
60A ABS10A ECU–B
7.5A DOME
15A EFI
10A HAZARD
20A RADIO NO.1
10A HORN
20A
10A Fuse
Page
214
230
11 2
122 194
187
180
166
210
ABS
Cigarette Lighter
Combination Meter
Key Reminder and Seat Belt Warning
Light Auto Turn Off
Theft Deterrent and Door Lock ControlABS and Traction Control
Cruise Control
Electronically Controlled Transmission
Multiplex Communication System
STOP System
DOME Headlight
Interior Light
3 EA2 1 EA1E 6
E 7
E 7
2
2
2
2 2
2 2
2
INJECTION Relay
STARTER Relay
B
B
B
B–O
1
1 2
23
4
3
4
W–B W–B
B–W
B–W
E 7
E 7 B
B W
1.25B FL MAIN
50A MAIN
7.5A AM2
15A HAZ–RADIO
2
2 2
2
2W
W EB1
EB1
7
6
W–R I 2 I 2 I 2
WW
W
W W
1 1
1 140A DOOR LOCK CB
7.5A DOME
1
W–L
R
1
1
2
43 1
11
1
1 1 1
G
G
W–R
15A TAIL
20A DEFOG
B–Y
84
32Ignition SW I 8
B–Y 1 1P–L
Battery
15A RAD CIG2
TAIL
Relay
Power Source
J POWER SOURCE (Current Flow Chart)
Engine Room R/B (See Page 20)
2
W W
B
B
B
B
B
W–RWW
W
G–W AM2
AM1
IG2
IG1 W
W
The chart below shows the route by which current flows from the battery \
to each electrical source
(Fusible Link, Circuit Breaker, Fuse, etc.) and other parts.
∗ The system shown here is an EXAMPLE ONLY. It is different to the actual circuit shown in the SYSTEM CIRCUITS SECTION.
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18AVENSIS (EWD526E)
E GLOSSARY OF TERMS AND SYMBOLS
BATTERY
Stores chemical energy and
converts it into electrical energy.
Provides DC current for the auto’s
various electrical circuits.GROUNDThe point at which wiring attaches to
the Body, thereby providing a return
path for an electrical circuit; without a
ground, current cannot flow.
CAPACITOR (Condenser)A small holding unit for temporary
storage of electrical voltage.HEADLIGHTSCurrent flow causes a headlight
filament to heat up and emit light. A
headlight may have either a single
(1) filament or a double (2) filament
1. SINGLE
FILAMENT
CIGARETTE LIGHTER
An electric resistance heating
element.2. DOUBLE
FILAMENT
CIRCUIT BREAKERBasically a reusable fuse, a circuit
breaker will heat and open if too
much current flows through it.
Some units automatically reset when
cool, others must be manually reset.HORNAn electric device which sounds a
loud audible signal.
DIODEA semiconductor which allows
current flow in only one direction.IGNITION COILConverts low–voltage DC current
into high–voltage ignition current for
firing the spark plugs.
DIODE, ZENER
A diode which allows current flow in one
direction but blocks reverse flow only up
to a specific voltage. Above that potential,
it passes the excess voltage. This acts as
a simple voltage regulator.LIGHTCurrent flow through a filament
causes the filament to heat up and
emit light.
PHOTODIODEThe photodiode is a semiconductor
which controls the current flow
according to the amount of light.LED (LIGHT EMITTING DIODE)
Upon current flow, these diodes emit
light without producing the heat of a
comparable light.
DISTRIBUTOR, IIAChannels high–voltage current from
the ignition coil to the individual
spark plugs.METER, ANALOG
Current flow activates a magnetic
coil which causes a needle to move,
thereby providing a relative display
against a background calibration.
FUSE
A thin metal strip which burns through
when too much current flows through it,
thereby stopping current flow and
protecting a circuit from damage.
FUSIBLE LINK
METER, DIGITALCurrent flow activates one or many
LED’s, LCD’s, or fluorescent
displays, which provide a relative or
digital display.
FUEL
A heavy–gauge wire placed in high
amperage circuits which burns through on
overloads, thereby protecting the circuit.
The numbers indicate the crosssection
surface area of the wires.(for Medium Current Fuse)
(for High Current Fuse or
Fusible Link)MOTOR A power unit which converts
electrical energy into mechanical
energy, especially rotary motion.
M
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3
5
12
3
FAN NO.1 Relay
40A HTR
(for High Current)
30A CDS
(for High Current)
30A RDI
(for High Current)
40A RDI FAN NO.3 Relay
(for High Current)
30A RR DEF
(for High Current)
40A MAIN
(for High Current)
50A EMPS
EMPS Relay
* 1:1AZ-FSE, 1AZ-FE
* 2:1ZZ-FE, 3ZZ-FE
(for High Current)
(from Engine Room Main Wire)
(*1)
(*2)
FAN NO.2 Relay
(from Engine Room Main Wire)5
12
3
5
12
53
21 12
21 12
1
30A
AM2 30A
DCC 20AEFI
15A
IG2
7.5A
ALT-S 10A
HAZARD 15A
HORN
20AA/F
10A
THROTTLE 2
21
21
21
21
21
21
12
12
4
2121 1
2
1 1
1B1A
24
AVENSIS (EWD526E)
F RELAY LOCATIONS
1: Engine Room R/B No.1
: Engine Room J/B No.1Engine Compartment Left (See Page 20)
(Gasoline)
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3
5
12
3
5
12
1
1
35
1
2 12
21 12
21
1
1 1
2
50A AM1 NO.1
(for High Current)
30A H/CLN
(for High Current)
40A HTR
(for High Current)
30A CDS
(for High Current)
50A VSC
FAN NO.3 Relay
EFI MAIN Relay
* 1:VSC (w/ VSC)
ABS (w/o VSC)
EDU Relay
30A RR DEF
(for High Current) 40A RDI
(for High Current)
40A MAIN
(for High Current)
(from Engine Wire)
(from Engine Room Main Wire)
(from Engine Wire)Gray
FAN NO.1 Relay
(for High Current)
40A ABS
(for High Current)
(w/ VSC)
(w/o VSC)
1
21 21 25A
*1
12
21 12
21 12
21
21 12
7.5A
30A
30A
10A
25A
15A
20A
25A
ALT-S
DCCAM2
HAZARD F-HTRHORN EFI
PWR HTR
21
3
1
2
5 12
1C
1B
1A
AVENSIS (EWD526E)
25
F
1: Engine Room R/B No.1
: Engine Room J/B No.1Engine Compartment Left (See Page 20)
(1CD–FTV)
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