Electronic Instrument Panels: Testing: Tachometer
Connect a test tachometer to engine. Start engine and compare vehicle tachometer reading with test tachometer. See appropriate TACHOMETER ALLOWABLE VARIATION table for tachometer allowable error.
TACHOMETER ALLOWABLE VARIATION
| Standard Indication RPM | Allowable RPM |
|---|---|
| 950 | 1000 |
| 1950 | 2000 |
| 2950 | 3000 |
| 3950 | 4000 |
| 4950 | 5000 |
| 5950 | 6000 |
| 6950 | 7000 |