The Horn Does Not Sound and/or the Headlights Do Not Flash When the Panic Button on the Transmitter is Pressed

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 transmitter is pressed

The horn does not sound and/or the headlights do not flash when the PANIC button on the transmitter is pressed

NOTE: Before troubleshooting, check the B-CAN DTCs. If any DTC is indicated, troubleshoot the indicated DTC first.

1. Press the PANIC button.

Does the horn sound?

YES -

Go to step 3.

NO -

Go to step 2.

2. Press the horn button.

Does the horn sound?

YES -

Go to step 3.

NO -

Check the horn circuit.�

3. Turn the headlight switch to ON.

Do the headlights come on?

YES -

Go to step 4.

NO -

Check the lighting circuit.�

4. Do the keyless transmitter test Keyless Entry Transmitter Test.

Is the transmitter OK?

YES -

Substitute a known-good immobilizer-keyless control unit and recheck. If the problem goes away, replace the original immobilizer-keyless control unit Service and Repair. If there is still a problem, substitute a known-good MICU and recheck. If the problem goes away,faulty MICU, replace the under-dash fuse/relay box Under-Dash Fuse/Relay Box Removal/Installation.�

NO -

Replace the keyless transmitter.�