Can Communication System: Fail-Safe

WARNING: This page is about a different car, the 2008 Lexus RX 350. However, it is still accessible from the selected car via links, so may be relevant.

FAIL-SAFE FUNCTION

When communication fails in any of the CAN bus wires (communication wires) 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.

Effects on each system when communication is impossible. (For further details, see the information for each system.)

FAIL-SAFE TABLE

Function	ECM	Skid Control ECU	Steering Angle Sensor	Yaw Rate Sensor	Distance Control ECU^*1	Gateway ECU	Condition when communication is impossible	DTC detection (Driver detectable)
VSC Control (Controls driving force while VSC is in operation)	◦	•	◦	◦	-	-	VSC function stops	Detectable (Light comes on)
Dynamic Laser Cruise (Maintains vehicle-to-vehicle distance) ^*1	◦	◦	◦	◦	•	-	Vehicle-to-vehicle distance control does not operate	Detectable (Light comes on)
Meter Display (Displays operation condition and DTCs)	◦	◦	-	-	-	• (Meter)	Light does not come on or remains on	Detectable (Light does not operate normally)
HINT: •: Control master ◦: System related ^*1 : with dynamic laser cruise control system