BCM Status Control

BCM changes its status depending on the operation status in order to save power consumption.

1. CAN communication status
   • With ignition switch ON, CAN communicates with other control units normally.
   • Control by BCM is being operated properly.
   • When ignition switch is OFF, switching to sleep mode is possible.
   • Even when ignition switch is OFF, if CAN communication with IPDM E/R and combination meter is active, CAN communication status is active.
2. Sleep transient status
   • This status shuts down CAN communication when ignition switch is turned OFF.
   • It transmits sleep request signal to IPDM E/R and combination meter.
   • Two seconds after CAN communication of all control units stops, sleep transient status is switched to CAN communication inactive status.
3. CAN communication inactive status
   • With ignition switch OFF, CAN communication is not active.
   • With ignition switch OFF, control performed only by BCM is active.
   • Three seconds after CAN communication of all control units stops, CAN communication inactive status is switched to sleep status.
4. Sleep status

• BCM is activated with low power mode.
• CAN communication is not active.
• When CAN communication operation is detected, it switches to CAN communication status.
• When a state of the following switches changes, it switches to CAN communication state.
  • Key switch
  • Hazard switch
  • Door lock/unlock switch
  • Front door switch (driver side, passenger side)
  • Rear door switch (LH, RH)
  • Back door opener switch
  • Combination switch (passing, lighting switch 1ST position, front fog lamp)
  • Key fob (lock/unlock signal)
  • Key cylinder switch
• When control performed only by BCM is required by switch, it shifts to CAN communication inactive mode.
• Status of combination switch reading function is changed.