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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 0.2 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 1.1 seconds.