Toyota Camry Manual page 1872

Horn Relay Circuit
CIRCUIT DESCRIPTION
When the theft deterrent system is activated, it causes the Tr in the ECU to switch ON and OFF in approxi-
mately 0.4 sec. cycles. This switches the horn relay ON and OFF, thus the horns blow (See the wiring dia-
gram below).
In this condition, if any of the following operations is done, the Tr in the ECU goes off and the horn relay
switches off, thus stopping the horns 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
FL BLOCK
1 1
F6
F4
B–G
FL MAIN
Battery
DIAGNOSTICS
E/G Room J/B No.2
HORN Relay
5
HORN
1
1
2A
B
– THEFT DETERRENT SYSTEM
G–W
1
3
2F
J/C J2
10
C
C
2
2K
G–B G–B
Author :
1
1
Horn
Theft Deterrent ECU
11 12
HORN
IG1 T3
G–B
Date :
DI–845
DI06W–06
I00262
1080