Malfunction Threshold

One of these symptoms occurs:

• Symptom 1

  The internal communication between the FI CPU and the A/T CPU is abnormal or the internal communication is interrupted for at least 1 second.

• 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 200 milliseconds.