Fuel Injectors
- Listen to injectors during cranking and at idle. They should make ticking sound. Frequency of sound should increase as engine speed increases.
- Disconnect injector 2-pin connector at injector. Check resistance between injector terminals. Injector resistance should be 13-16 ohms at 68°F (20°C). On engines with inaccessible injector connectors, check resistance at the injector intermediate connector. To test right bank injectors on Eclipse 3.0L and Galant 3.0L, disconnect right bank injector intermediate 4-pin connector. To test all injectors on Montero and Montero Sport, disconnect injector intermediate 8-pin connector. To test all injectors on Diamante, disconnect injector intermediate 12-pin connector. Check resistances between indicated terminals. See INJECTOR CHECK AT INJECTOR INTERMEDIATE CONNECTOR table.
- If using lab scope, connect lab scope pick-up to ECM/PCM side (ground side) of injector circuit. Start engine. Compare waveform to normal waveform. See Fig 1.
- To test injector circuit, see DTC P0201-P0204: INJECTORS NO. 1-4 CIRCUIT MALFUNCTION or DTC P0201-P0206: INJECTORS NO. 1-6 CIRCUIT MALFUNCTION in appropriate SELF-DIAGNOSTICS article.
INJECTOR CHECK AT INJECTOR INTERMEDIATE CONNECTOR
| Application | Injector No. | Check Between Intermediate Connector Terminals No. |
|---|---|---|
| Diamante (Both Banks) | ||
| ..... | 1 | 6 & 12 |
| ..... | 2 | 6 & 5 |
| ..... | 3 | 6 & 11 |
| ..... | 4 | 6 & 4 |
| ..... | 5 | 6 & 10 |
| ..... | 6 | 6 & 3 |
| Eclipse & Galant 3.0L (Right Bank) | ||
| ..... | 1 | 1 & 2 |
| ..... | 3 | 1 & 3 |
| ..... | 5 | 1 & 4 |
| Montero & Montero Sport (Both Banks) | ||
| ..... | 1 | 8 & 3 |
| ..... | 2 | 8 & 2 |
| ..... | 3 | 8 & 1 |
| ..... | 4 | 8 & 7 |
| ..... | 5 | 8 & 6 |
| ..... | 6 | 8 & 5 |