Component Testing: Tachometer
Hook up a known good test tachometer to engine. If test tachometer and vehicle tachometer indication have a larger variation than specified in TACHOMETER TESTING table, tachometer is faulty.
TACHOMETER TESTING
| Vehicle RPM | Segments Illuminated |
|---|---|
| 125-250 | 1 |
| 250-750 | 2 |
| 750-1250 | 3 |
| 1250-1750 | 4 |
| 1750-2250 | 5 |
| 2250-2750 | 6 |
| 2750-3250 | 7 |
| 3250-3750 | 8 |
| 3750-4250 | 9 |
| 4250-4750 | 10 |
| 4750-5250 | 11 |
| 5250-5750 | 12 |
| 5750-6500 | 13 |
| 6500-7500 | 14 |
| 7500 or more | 15 |