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2016 – MX-5 – Body and Accessories

LIGHTS-ON REMINDER WARNING ALARM

Purpose

• The lights-on reminder warning alarm warns the driver that the TNS (parking lights) and headlights are not turned off.

Functions

• The instrument cluster controls the lights-on reminder warning alarm based on the following signals:

Signal name	Sending module/part name	Communication method
TNS (parking lights) signal	Start stop unit	HS-CAN
Driver’s side door latch switch on (door open) signal	BCM
Auto light-OFF system OFF signal

• If the ignition is switched off or ACC when all the above vehicle condition signals are received, the instrument cluster operates the lights-on reminder alarm.

• The lights-on reminder warning alarm is activated in the pattern shown in the figure.

  

Construction

• The lights-on reminder warning alarm is activated using the buzzer built into the instrument cluster.

Operation

1. When the instrument cluster receives (1) a TNS (parking lights) signal from the start stop unit and a driver’s side door latch switch on (door open) signal and auto light-OFF system OFF signal from the BCM via CAN communication while the ignition is switched ACC or off, it turns on (2) the transistor.

2. When the transistor is turned on, a ground circuit with the lights-on reminder warning alarm is established and the lights-on reminder warning alarm is activated (3).

Fail-safe

• Not applicable

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