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 |
|---|---|
| 1000 | 980-1020 |
| 2000 | 1960-2040 |
| 3000 | 2940-3040 |
| 4000 | 3920-4080 |
| 5000 | 4900-5100 |
| 6000 | 5880-6120 |
| 7000 | 6860-7140 |
| 8000 | 7840-8160 |