Note: To check the tachometer, use an external high-precision inductive tachometer.
2. Compare the readings of the car tachometer and the external tachometer at all engine speeds, and check for compliance with the nominal values.
Nominal values:
| Nominal engine speed, rpm | Allowable range, rpm |
| 700 | 700±100 |
| (2,000) | (2,000±100) |
| 3,000 | 3,000±100 |
| (4,000) | (4,000±100) |
| 5,000 | 5,000±100 |
| 6,000 | 6,000±100 |