2011 Toyota Camry horn chirps when I turn off engine. Was working fine. Have Excalibur keyless and remote start

When Horn chirp is enabled, the vehicle horn will chirp on locking and unlocking the vehicle, to enable or disable the horn chirp:

1. Turn headlight switch "OFF"

2. Cycle the ignition switch from "LOCK" to "ON" three times (within 5 seconds) leaving it "ON"

3. The vehicle security indicator will illuminate continuously for 5 seconds

4. During the time the indicator is illuminated, operate the horn(for 1 second). The turn signals will flash once to confirm successful programming.

5. Turn ignition switch to "LOCK" and test system with the remote controls.

To disable horn chirp, repeat the procedure for enabling.

The user manual actually declares customizations of the smartkey must be done by the dealers using special equipment. However, the above procedure works on a variety of years and models. And I see no where in the user manual that refers to the horn and door lock even being a customizable setting.

System Description
The horn system consists of the following components:
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HORN fuse

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Horn relay

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Horn slip ring

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Horn switch

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Horn assembly

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Body Control Module (BCM)

System Operation
The vehicle horn system is activated under the following conditions:
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The horn switch is depressed.

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The body control module (BCM) commands the horns on. The BCM commands the horns on under any of the following conditions:

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When the panic button is depressed on the remote control door lock transmitter. For further information refer to Keyless Entry System Description and Operation .

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When the keyless entry system is used to lock the vehicle, a horn chirp may sound to notify the driver that the vehicle has been locked. The notification feature may be enabled or disabled through personalization. For further information refer to Keyless Entry System Description and Operation .

Toyota is having problems.. Nothing surprises me

If you have your owner's manual, there is a section that will tell you the exact sequence to press to enable/disable the horn bonk. It has three settings, chirp, honk, and off. The chirp is a really quick chirp of the horn. Honk is a longer honk. Off seems to be what you've set.

I hope this helps.

SECTION 501-14B: Keyless Entry/Computer Operated Locks 1999 Town Car Workshop Manual GENERAL PROCEDURES Programming —Keyless Entry Keypad Code

1. Enter the permanent factory keyless entry keypad code.

1. Press the 1/2 button within five seconds to activate the programming mode. Holding the 1/2 button for more than two seconds will erase all stored customer codes. The existing codes do not need to be erased to program new codes.

1. Enter the new five-digit keyless entry keypad code.

1. To associate the new code with personality positions 1, 2 or 3, press the 1/2 button within 5 seconds of entering the 5th digit of the new code for position 1 or 3/4 button for position 2 or 5/6 for position 3. The door locks will lock and unlock confirming the new code is programmed.

1. If another code is to be programmed, begin entering the code within 5 seconds of the last button pressed.

1. After all new keyless entry codes are programmed:
   • Press keyless entry keypad buttons 7/8 and 9/0 at the same time to exit the program mode.
   • Wait for 5 seconds; the driver door module (DDM) will exit the program mode automatically.
   • -------------------------------------------------------------

Programming —Transmitter

1. Cycle the ignition from OFF to RUN four times within three seconds. The locks will then lock and unlock, confirming program mode has been entered.

1. NOTE: When the first keyless entry remote transmitter is programmed, all other keyless entry remote transmitters are erased.
   Press any button on the transmitter to be programmed.

1. If additional keyless entry remote transmitters are to be programmed, repeat step 2 within 7.5 seconds.

1. To exit program mode, turn the ignition to START or wait 7.5 seconds.

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Programming —Remote Memory Activation NOTE: This procedure must be completed within 5 seconds.

1. Press the SET button on the driver door panel.

1. Press any button on the keyless entry remote transmitter to be associated with a memory setting.

1. Press the 1 or 2 memory button on the driver door panel.

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Programming —Autolock and Horn Chirp

1. NOTE: This procedure must be completed within 30 seconds.
   Turn the ignition switch to RUN.

1. Press the UNLOCK button three times.

1. Turn the ignition switch to OFF.

1. Press the UNLOCK button three times.

1. Turn the ignition switch to RUN. The doors will lock and unlock to confirm entry into program mode.

1. Press the UNLOCK button once to toggle the Autolock feature on or off, or twice to toggle the Horn Chirp function on or off. The horn will chirp to confirm toggling of the Autolock feature.

1. Exit program mode by turning the ignition to OFF, START, or wait 7.5 seconds.

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How about ground. The horn must receive 12 volts and ground to work. If its getting both, change the horn.

check for broken wires the neagative is by the horn button in the steering wheel has air bag ever been replaced in steering wheel if so the wire may have not been plugged in

Two things that I would look at:

1.) The spark plugs should be changed at this mileage

2.) She may be having the beginnings of an Idle Control Valve ("IAC") failure.

The security LED blinking is normal

The horn issue may be a weak battery on the keyless entry remote transmitter