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Camry XLE Sedan L4-2164cc 2.2L DOHC (5S-FE) MFI (1999)

Relays and Modules > Relays and Modules - Accessories and Optional Equipment > Alarm Horn Relay > Component Information > Testing and Inspection

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Alarm Horn Relay: Testing and Inspection

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 approximately 0.4 sec. cycles. This switches the horn
relay ON and OFF, thus the horns blow (See the wiring diagram).
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 

Relays and Modules > Relays and Modules - Accessories and Optional Equipment > Alarm Horn Relay > Component Information > Testing and Inspection

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