Fail-Safe Chart

WARNING: This page is about a different variant/trim than selected.

FAIL-SAFE FUNCTION

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

The following table shows the effects on each system when communication is impossible. (For further details, see information for each system.)

Function (Function Description)	Control Master	System Related	Fail-safe Operation	DTC (Driver Detectable)
Power switch (Power source control)	Power management control ECU	Transmission control ECU Skid control ECU Main body ECU	Power switch does not change to on (READY) even when power switch is pressed with the brake pedal depressed Power switch off is prohibited	U0129 U0293 (Warning and indicator lights come on)
Hybrid driving control	Power management control ECU	ECM	Only motor operation is used (Engine is not used)	U0100 (Warning and indicator lights come on)
Shift position indicator display	Transmission control ECU	Power management control ECU Main body ECU Combination meter	Shift position indicator is not displayed	U0146 (Warning and indicator lights come on)
Regenerative braking control	Power management control ECU	Skid control ECU	Regenerative braking will stop (ABS/VSC control gradually stops)	U0073 U0129 U0293 (Warning and indicator lights come on)
VSC control (Controls driving force while VSC operating)	Skid control ECU	Power management control ECU Yaw rate sensor Steering angle sensor	ABS/VSC control is inoperative (ABS/VSC control gradually stops)	U0073 U0123 U0124 U0126 U0293 (Warning and indicator lights come on)
ABS control (Controls driving force while ABS operating)	Skid control ECU	Yaw rate sensor	ABS control is inoperative (ABS control gradually stops)	U0073 U0123 U0124 (Warning and indicator lights come on)
TRAC control (Engine power control by VSC/TRAC)	Skid control ECU	Power management control ECU Yaw rate sensor Steering angle sensor	ABS/VSC control is inoperative (ABS/VSC control gradually stops)	U0073 U0123 U0124 U0126 U0293 (Warning and indicator lights come on)
Electric power steering control (Speed of vehicle induction type torque control)	Power steering ECU	Power management control ECU Skid control ECU	Depression of EPS assist (Deterioration of steering assist)	U0129 U0293 (Warning light comes on)
Air conditioning control (Air conditioning control is in cabin)	Air conditioning amplifier	Power management control ECU ECM Combination meter Main body ECU	Air conditioning function and PTC heater function stop	U0100 U0142 U0155 U0293 (Air conditioning is inoperative)
Entry function/Power door lock control	Certification ECU Main Body ECU	ECM Combination meter Power management control ECU Center airbag sensor assembly	Unlock permitted	U0100 U0101 U0142 U0151 U0155 U0293 U0327 U1133 (Wireless door lock cannot operate)
Navigation Eco display Displays fuel consumption per minute and regeneration amount in chart and displays history of average fuel economy	Navigation ECU Sub-assembly12 Radio and Display Receiver Assembly*2	Power management control ECU Skid control ECU ECM Combination meter	On the navigation Eco screen: Update of the per-minute fuel consumption display (per minute fuel consumption calculation) on the navigation Eco screen (per-minute fuel consumption screen) is stopped Update of the current average fuel economy display on the navigation Eco screen (block fuel consumption screen) is stopped If drivable mileage is displayed on the navigation Eco screen (block fuel consumption screen), the numeric part of the drivable mileage disappears because drivable mileage data cannot be received	U0100 U0155 U0293 (None)
Energy monitor display Creates energy flow screen which indicates regeneration status and drive force transmission status	Navigation ECU Sub-assembly12 Radio and Display Receiver Assembly*2	Power management control ECU	Energy flow is not displayed	U0100 U0293 (None)
Destination identification Identifies destination based on destination and destination package information, and selects the time zone and language used for the display	Navigation ECU Sub-assembly12 Radio and Display Receiver Assembly*2	Main body ECU	Destination is identified based on information received before communication is interrupted.	U0140 (None)
Vehicle customization function Allows changing of operation and control conditions for vehicle functions via multi-display operation	Navigation ECU Sub-assembly12 Radio and Display Receiver Assembly*2	Certification ECU Main body ECU Air conditioning amplifier	When an application that uses remote communication is activated (customization/remote diagnosis), the process will be performed regardless of main body ECU remote communication permit/prohibit state	U0073 (None)
Time stamp function Diagnostic function that links relative time information from the main body ECU (multiplex network body ECU) and absolute time (actual time) obtained from GPS	Navigation ECU Sub-assembly*1 Main body ECU	-	-	U0073 (None)
Rear view monitor control Displays rear view monitor (without guide lines)	Navigation ECU Sub-assembly12 Radio and Display Receiver Assembly*2	Power management control ECU Main body ECU	Screen does not change to camera display.	U0100 (None)
Vehicle-to-vehicle distance control	Driving support ECU	Power management control ECU Skid control ECU ECM Steering angle sensor Yaw rate sensor Main body ECU	Vehicle-to-vehicle distance control does not operate	U0122 U0123 U0126 U0293 (Warning and indicator lights come on)
Lane keeping assist system	Driving support ECU	Main body ECU Skid control ECU Yaw rate sensor EPS ECU Combination meter	Lane-keeping assist is inoperative	U0122 U0123 U0131 U1104 (Warning and indicator lights come on)
Pre-collision system	Driving support ECU	Power management control ECU Skid control ECU Steering angle sensor Yaw rate sensor Seat belt control ECU Combination meter Main body ECU	Pre-collision control is inoperative	U0122 U0123 U0126 U0142 U0293 U1104 U1100 (Warning and indicator lights come on)
Pre-collision system	Seat belt control ECU	Skid control ECU Driving support ECU Center airbag sensor Main body ECU	Pre-collision control is inoperative	U0122 U0140 U0151 U1104 (Warning and indicator lights come on)

HINT:

*1: for Navigation receiver type
*2: for Radio and display type