| One of the following conditions is met |
Conditions A, B, C or D |
| A. All of the following conditions are met |
- |
| EGR1 output terminal voltage level |
Low |
| Either of the following conditions is met |
1 or 2 |
| 1. Step motor |
Driving |
| 2. Command to step motor phase 1 |
Off |
| B. All of the following conditions are met |
- |
| EGR2 output terminal voltage level |
Low |
| Either of the following conditions is met |
3 or 4 |
| 3. Step motor |
Driving |
| 4. Command to step motor phase 2 |
Off |
| C. All of the following conditions are met |
- |
| EGR3 output terminal voltage level |
Low |
| Either of the following conditions is met |
5 or 6 |
| 5. Step motor |
Driving |
| 6. Command to step motor phase 3 |
Off |
| D. All of the following conditions are met |
- |
| EGR4 output terminal voltage level |
Low |
| Either of the following conditions is met |
7 or 8 |
| 7. Step motor |
Driving |
| 8. Command to step motor phase 4 |
Off |