Outline Of Diagnosis

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Detect malfunction of soaking timer IC by the five diagnoses below.

Monitor Number	Explanation	Time required for diagnosis
Monitor #1 <Timer diagnosis>	Perform diagnosis of the soaking timer IC accuracy	128 ms
Monitor #2 <Full count diagnosis>	Perform diagnosis of the soaking timer IC counter function	128 ms
Monitor #3 <Soaking timer IC setting diagnosis>	Perform diagnosis of communication between ECM and soaking timer IC	128 ms
Monitor #4 <Timer diagnosis (during soaking)>	Perform diagnosis of the soaking timer IC accuracy during soaking	None
Monitor #5 <Wake-up diagnosis>	Perform diagnosis of wake-up function	None

Fig 1: Ignition Switch And Soak Timer IC Counter Diagnosis Graph (1 Of 2)

Courtesy of SUBARU OF AMERICA, INC.

Fig 2: Ignition Switch And Soak Timer IC Counter Diagnosis Graph (2 Of 2)

Courtesy of SUBARU OF AMERICA, INC.