Toyota Sienna Service Manual: Fail-safe chart

1. FAIL-SAFE FUNCTION

1. When communication fails in any of the main wires (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. The table below shows the effects on each system when communication is impossible. For further details, refer to each system.

HINT:

• A: Main control judgment system
• B: Location where necessary control information is input

• Skid Control ECU Communication Stop Mode
• Distance Control ECU Communication Stop Mode
• Gateway ECU Communication Stop Mode
• Steering Angle Sensor Communication Stop Mode
• Yaw Rate Sensor Communication Stop Mode
• ECM Communication Stop Mode
• CAN Bus Line
• Open in CAN Main Bus Line
• Short in CAN Bus Lines
• Short to B+ in CAN Bus Line
• Short to GND in CAN Bus Line
• Open in One Side of CAN Branch Line