Combination Switch Reading Function Description

BCM reads the status of the combination switch at 10 ms intervals normally.

Fig 1: Combination Switch Input And Output Patterns
Courtesy of NISSAN NORTH AMERICA, INC.

NOTE:
BCM reads the status of the combination switch at 60 ms intervals when BCM is controlled at low power consumption control mode.
BCM operates as follows and judges the status of the combination switch.
- It operates the transistor on OUTPUT side in the following order: OUTPUT 1 → 2 → 3 → 4 → 5, and outputs voltage waveform.
- The voltage waveform of OUTPUT corresponding to the formed circuit is input into the interface on INPUT side if any (1 or more) switches are ON.
- It reads this change of the voltage as the status signal of the combination switch.
  
  Fig 2: BCM Output And Input Voltage Waveform Graph
  Courtesy of NISSAN NORTH AMERICA, INC.