Light Warning Chime

WARNING: This page is about a different car, the 2008 Infiniti M45 and 2008 Infiniti M35. However, it is still accessible from the selected car via links, so may be relevant.

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: Warning Chime Light Communication Diagram
Courtesy of NISSAN MOTOR CO., U.S.A.

NOTE: For further details of combination switch, refer to "SYSTEM DESCRIPTION ".