CAN COMMUNICATION SYSTEM FAIL-SAFE CHART


  1. FAIL-SAFE FUNCTION


    1. When communication fails in any of the CAN bus lines (communication lines) due to a short circuit or other causes, the fail-safe function, which is specified for each system, operates to prevent the system from malfunctioning.

    2. Relationships between components and system functions and effects of communication failure on these functions. (For further details, see the pages for each system.)

      Function ECM ABS and Traction Actuator (Skid Control ECU) Steering Sensor Yaw Rate Sensor Condition when communication impossible DTC detection (Driver detectable)
      VSC control (Controls driving force while VSC in operation) ○ ● ○ ○ Control inoperative (gradually stops controlling during VSC control) Detectable (Light comes on)
      TRC control (Controls driving force and engine power when wheel slip detected during acceleration) ○ ● ○* ○* Control inoperative (gradually stops controlling during TRC control) Detectable (Light comes on)
      ABS control (Controls driving force while ABS in operation) ○ ● Control is inoperative (gradually stops controlling during ABS control) Detectable (Light comes on)

      Tech Tips


      • ●: Control master

      • ○: System related

      • *: When CAN communication failures occur in the steering sensor and yaw rate sensors, the operations of VSC and TRC are prohibited.