Normal Operation

The Smart Junction Box (SJB) controls the perimeter alarm system and based on inputs either arms, disarms or activates the alarm. When the alarm is activated, the SJB sounds the horn and flashes the turn signals in regular intervals. The SJB receives inputs for the door lock status, hood ajar, door ajar, luggage compartment lid ajar and the intrusion and inclination sensor. The SJB also receives signals from the Remote Keyless Entry (RKE) transmitters.

For the perimeter alarm to arm and provide a flash of the turn signals, the following conditions must be met:

• Ignition must be OFF
• The hood closed
• All doors closed
• The luggage compartment lid closed
• An electronic lock command received from an RKE transmitter or door lock control switch (a door opened and then shut after lock is pressed).

Once all the conditions are met, the alarm system enters a pre-arm phase and begins a 20-second countdown. After 20 seconds have passed and no unlock command is received or any hood or door is opened, the perimeter alarm arms.

The perimeter alarm is activated when:

• any door, the hood, or the luggage compartment lid is opened without an electronic unlock command from an RKE transmitter or driver door lock cylinder first.
• the intrusion and inclination sensor detects movement inside the vehicle or the vehicle angle has been changed.
• the ignition is turned to the RUN position without a valid Passive Anti-Theft System (PATS) key read received.

This pinpoint test is intended to diagnose the following: 

• Door ajar input
• Hood ajar input
• Luggage compartment lid ajar input
• Turn signals
• Intrusion and inclination sensor
• RKE transmitter concern
• SJB