Diagnostic Method
Abnormality Judgment
Judge as NG if the criteria below are met.
Judgment Value
JUDGMENT VALUE CHART
| Malfunction Criteria | Threshold Value |
|---|---|
| Main CPU normal RAM abnormal | |
| Write 5AA5A55A and then read. (Whole area of RAM) | 5AA5A55A cannot be read. |
| Write A55A5AA5 and then read. (Whole area of RAM) | A55A5AA5 cannot be read. |
| Sub CPU normal RAM abnormal | |
| Write 5AA5 and then read. (Whole area of RAM) | 5AA5 cannot be read. |
| Write A55A and then read. (Whole area of RAM) | A55A cannot be read. |
Time Needed for Diagnosis: Undetermined
Malfunction Indicator Light Illumination: Illuminates as soon as a malfunction occurs.
Normality Judgment
Judge as OK and clear the NG when the malfunction criteria below are met.
Judgment Value
JUDGMENT VALUE CHART
| Malfunction Criteria | Threshold Value |
|---|---|
| Main CPU normal RAM abnormal | |
| Write 5AA5A55A and then read. (Whole area of RAM) | 5AA5A55A can be read. |
| And write A55A5AA5 and then read. (Whole area of RAM) | A55A5AA5 can be read. |
| Sub CPU normal RAM abnormal | |
| Write 5AA5 and then read. (Whole area of RAM) | 5AA5 can be read. |
| And write A55A and then read. (Whole area of RAM) | A55A can be read. |