Light Warning Chime

With ignition switch in OFF or ACC position, driver door open, and lighting switch in 1ST or 2ND position, the light warning chime will sound.

BCM detects ignition switch in OFF or ACC position, front door switch (driver side) ON, and lighting switch in 1ST or 2ND position. And then transmits buzzer output signal (light warning chime) to unified meter and A/C amp. with CAN communication line.
Unified meter and A/C amp. transmits buzzer output signal (light warning chime) to combination meter with communication line.
When combination meter receives buzzer output signal (light warning chime), it sounds the buzzer.

Fig 1: Light Warning Chime System Description

Courtesy of NISSAN MOTOR CO., U.S.A.

NOTE: For further details of combination switch, refer to "COMBINATION SWITCH READING FUNCTION ".