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Free to use workshop manual for your 2015+ Mk4 'ND' Mazda MX-5
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THEFT-DETERRENT SYSTEM

Outline

  • The theft-deterrent system operates the horn and hazard warning lights if a door, trunk lid or the hood is improperly opened.

  • An answer-back function has been adopted which allows visual verification of the theft-deterrent system operation.

  • Signal input/output of the theft-deterrent system is controlled by the BCM.

Structural View

System Wiring Diagram

Function

Answer back function

  • When a locking operation is performed using the remote transmitter is in stand-by preparation mode, stand-by mode, the hazard warning lights flash once.

  • When a unlocking operation is performed using the remote transmitter is in initial mode, the hazard warning lights flash twice.

Operation

Mode transition

  • The BCM switches the theft-deterrent system mode based on the ignition switch and door conditions.

Operation stop mode

  • In this mode, all theft-deterrent system operations are stopped.

  • The system changes to the operation stop mode when any of the following conditions are met.

    • Switch the ignition to ACC or ON (engine off).

Initial mode

  • This mode is the preparatory mode before changing to the stand-by mode. The system does not change directly to the alert mode from this mode.

    Transition condition to the initial mode

  • The system changes from the operation stop mode to the initial mode if all of the following conditions are met.

    • Switch the ignition off

  • The system transitions from stand-by preparatory mode, stand-by mode, alert mode, and alert preparatory mode to the initial mode if the cancel conditions in each mode are met.

    Transition condition to the stand-by preparatory mode

  • The system changes to the stand-by preparatory mode if any of the following conditions are met.

    • A lock operation was performed using the remote transmitter lock button or key with all the doors, trunk lid, and hood closed.

Stand-by preparatory mode

  • This is mode prior to the stand-by mode.

  • If the cancel conditions are met, the system changes to the initial mode.

    Transition condition to the stand-by mode

  • If the stand-by preparatory mode continues for approx. 20 s, the system changes to the stand-by mode.

    Cancel conditions

  • If any of the following conditions are met, the stand-by preparation mode is canceled and the system changes to the initial mode.

    • Any door latch switch on (door is open), or trunk lid latch switch on (trunk lid is open), or hood latch switch off (hood is open)

    • Any door lock-link switch UNLOCK

    • Switch the ignition to ACC or ON (engine off)

    • Unlock operation using remote transmitter

Stand-by mode

  • If any unauthorized operation is detected, the system changes to the alert mode.

  • If the cancel conditions are met, the system changes to the initial mode.

    Transition condition to the alert mode

  • If any of the following conditions are met, the system changes to the alert mode.

    • Switch the ignition to ACC or ON (engine off)

    • Door latch switch on (door is open)

    • Trunk lid latch switch on (trunk lid is open)

    • Hood latch switch off (hood is open)

    • Door lock-link switch UNLOCK

    • Unlock operation using front door key cylinder

    Cancel condition

  • If any of the following conditions are met, the stand-by mode is canceled and the system changes to the initial mode.

    • Unlock operation using remote transmitter

    • Switch the ignition ON (engine on)

Alert mode

  • In this mode, the theft-deterrent horn and hazard warning lights are operated to alert the surrounding area.

  • When the alarm period (approx. 30 s) has elapsed, the system changes to the alert preparatory mode.

  • If the cancel conditions are met, the system changes to the initial mode.

    Transition condition to the alert preparatory mode

  • When the alarm period (approx. 30 s) has elapsed, the system changes to the alert preparatory mode.

  • The alarm period is not extended even if a transition condition to alert mode is met again during an alarm period.

    Cancel condition

  • If any of the following conditions are met, the alert mode is canceled, and the system changes to the initial mode.

    • Unlock operation using remote transmitter

    • Switch the ignition ON (engine off), and engine start

    • Open the trunk lid using the trunk lid opener switch

    • Open the trunk lid using the remote transmitter

Alert preparatory mode

  • In the alert preparatory mode, the horn and hazard warning light are not operated, however, the alarm triggers immediately if the condition is changed.

  • If the cancel conditions are met, the system changes to the initial mode.

    Transition condition to alert mode

  • The system changes to the alert mode if any of the following conditions are met.

    • The ignition is switched from ON to off, or from off to ON

    • The door latch switch is turned from on (door is open) to off (door is closed), or from off (door is closed) to on (door is open)

    • The trunk lid latch switch is turned from on (trunk lid is open) to off (trunk lid is closed), or from off (trunk lid is closed) to on (trunk lid is open)

    • The hood latch switch is turned from off (hood is open) to on (hood is closed) or from on (hood is closed) to off (hood is open)

    • The door lock-link switch is locked from unlock, or unlocked from lock

    • The front door key cylinder is locked from unlock, or unlocked from lock

    Cancel condition

  • If any of the following conditions are met, the alert preparatory mode is canceled and the system changes to the initial mode.

    • Unlock operation using remote transmitter

    • Switch the ignition ON, and engine start

    • Open the trunk lid using the trunk lid opener switch

    • Open the trunk lid using the remote transmitter

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Free to use workshop manual for your 2015+ Mk4 'ND' Mazda MX-5

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