Keyless/Power Door Locks/Security System Symptom Troubleshooting - The horn does not sound and/or the headlights do not flash when the PANIC button on the remote/transmitter is pressed
The horn does not sound and/or the headlights do not flash when the PANIC button on the remote/transmitter is pressed
NOTE: Before troubleshooting, check the B-CAN DTCs. If any DTC is indicated, troubleshoot the indicated DTC first.

1.
Determine possible failure area (MICU, others):

Determine possible failure area (MICU, others)
?1.
Press the PANIC button.

Do the horns sound?

     
YES
     
     
     
Go to step 3.
     
NO
     
     
     
Go to step 2.
2.
Horn operation check:

Horn operation check
?1.
Press the horn button.

Do the horns sound?

     
YES: Without keyless access system
     
     
     
Replace the keyless transmitter, then register the new transmitter.?
     
YES: With keyless access system
     
     
     
Replace the keyless remote, then register the new remote.?
     
NO
     
     
     
Check the horn circuit.?
3.
MICU check:

MICU check
?1.
Turn the headlight switch ON.

Do the headlights come on?

     
YES
     
     
     
Intermittent failure, the system is OK at this time. Check for loose or poor connections.?
     
NO
     
     
     
Check the lighting circuit. Do the MICU input test.?