Component Testing: Tachometer
Hook up a known good test tachometer to engine. If test tachometer and vehicle tachometer indication have a larger variation that specified in table, tachometer is faulty.
TACHOMETER TESTING
| Test Tachometer RPM | Vehicle Tachometer RPM |
|---|---|
| 500 | 400-600 |
| 1000 | 800-1200 |
| 2000 | 1800-2200 |
| 3000 | 2800-3200 |
| 4000 | 3700-4300 |
| 5000 | 4700-5300 |
| 6000 | 5700-6300 |