Outline Of Diagnosis

Confirm the engine off timer accuracy by comparing engine off timer and power supply IC timer after ignition switch is turned to OFF.

This diagnosis consists of the following six cases. Judge as NG when in any one of the following cases, abnormality is detected.

Monitor 1:

Diagnose the difference between wake-up request time and power supply IC timer.

Monitor 2:

Diagnose the time in power supply IC timer before wake up.

Monitor 3:

Diagnose the communication error between main CPU and sub CPU.

Monitor 4:

Diagnose the communication error between main CPU and power supply IC.

Monitor 5:

Diagnose the operation status abnormality in main CPU and sub CPU.

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