When Mechanical Key Is Used

With the key inserted into the key switch, and the ignition switch in the LOCK or ACC position, when driver's door is opened, the warning chime will sound.

• BCM detects key inserted into the ignition switch, and sends key warning signal to combination meter with CAN communication line.
• When combination meter receives key warning signal, it sounds warning chime.
  Fig 1: Warning Signal To Combination Meter - Communication Diagram

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