Operation Mode

WARNING: This page is about a different car, the 2006 Nissan Murano. However, it is still accessible from the selected car via links, so may be relevant.

Combination switch reading function has operation modes shown below.

Normal status
When BCM is not in sleep status, OUTPUT terminals (1-5) send out ON signal every 10 ms.
Sleep status
When BCM is in sleep status, transistors of OUTPUT 1 and 5 stop the output, and BCM enters low power mode. Mean while OUTPUT 2, 3, and 4 send out ON signal every 60 ms, and accept input from lighting switch system.

Fig 1: Identifying Blinking Pattern - Lighting Switch System
Courtesy of NISSAN MOTOR CO., U.S.A.