Malfunction Threshold

One of these symptom occurs.

• Symptom 1

  The serial communication between the FI CPU and A/T CPU is abnormal or the serial communication is interrupted for at least 500 milliseconds.

• Symptom 2

The watchdog timer that monitors the A/T CPU detects an abnormality, and the FI CPU receives the A/T CPU check signal for at least 30 milliseconds.