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

Before troubleshooting, check the B-CAN DTCs.
If any DTCs are indicated, refer to B-CAN System Diagnosis Test Mode A Troubleshooting - B-CAN System Diagnosis Test Mode A, and troubleshoot the indicated DTC(s) first.

1. Press the PANIC button.

Do the horns sound?

YES -

Go to step 3.

NO -

Go to step 2.

2. Press the horn button.

Do the horns sound?

YES -

Go to step 3.

NO -

Do the horn switch test Testing and Inspection.

3. Turn the headlight switch ON.

Do the headlights come on?

YES -

Go to step 4.

NO -

Check the lighting circuit, Do the MICU input test Keyless/Power Door Locks/Security System (Drivers and Passengers MICU, Door Multiplex Control Unit, and Front Passengers Power.

4. Do the transmitter test Keyless Entry Transmitter Test.

Is the transmitter OK?

YES -

Substitute a known-good immobilizer-keyless control unit, and recheck. If there is still a problem, substitute a known-good driver's under-dash fuse/relay box, and recheck. If the problem goes away, replace the original immobilizer-keyless control unit Service and Repair, or the driver's under-dash fuse/relay box, USA models Drivers Under-Dash Fuse/Relay Box (Drivers MICU) Removal and Installation (USA models), Canada models Drivers Under-Dash Fuse/Relay Box (Drivers MICU) Removal and Installation (Canada models).

NO -

Replace the transmitter.