Can Communication System (For Rhd) Fail-Safe Chart

Communication System. Camry. Acv40 Gsv40
Can Communication. Camry. Acv40 Gsv40

  1. FAIL-SAFE FUNCTION

Can Communication System (For Rhd) -- Fail-Safe Chart



FAIL-SAFE FUNCTION

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

  2. The following chart shows the 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
    		Skid Control ECU
    (Without VSC)
    		Skid Control ECU
    (With VSC)
    		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)
    Air conditioning control
    		○
    		-
    		-
    		-
    		-
    		Air conditioning function stops
    PTC heater function stops
    		None (Air conditioning inoperative)
    Meter Display (Displays operation condition and DTCs)
    		○
    		○
    		-
    		-
    		-
    		Light does not come on, illuminates abnormally, or blinks abnormally
    		Detectable (Abnormal display)
    Buzzer control
    		○
    		○
    		-
    		-
    		-
    		Buzzer function stops
    		Detectable (Buzzer does not sound)
    Illumination control
    		○
    		-
    		-
    		-
    		-
    		Light illumination rheostat inoperative
    		None (Rheostat inoperative)

    HINT:
    1. ●: Control master
    2. ○: System related
    3. *: with VSC

    Function
    		Center Airbag Sensor Assembly
    		Air Conditioning Amplifier
    		Combination Meter ECU
    		Main Body ECU
    		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)
    Air conditioning control
    		-
    		●
    		○
    		○
    		Air conditioning function stops
    PTC heater function stops
    		None (Air conditioning inoperative)
    Meter Display (Displays operation condition and DTCs)
    		○
    		-
    		●
    		○
    		Light does not come on, illuminates abnormally, or blinks abnormally
    		Detectable (Abnormal display)
    Buzzer control
    		○
    		-
    		●
    		-
    		Buzzer function stops
    		Detectable (Buzzer does not sound)
    Illumination control
    		-
    		-
    		○
    		●
    		Light illumination rheostat inoperative
    		None (Rheostat inoperative)
    HINT:
    1. ●: Control master
    2. ○: System related