Digifant II

Digifant II Injectors/Pressure Regulator:

Digifant II Injector Resistance:

1. A Faulty Injector can be detected by checking resistance at the main electrical connector on the end of the fuel rail. The resistance should be between:

3.7 and 5.0 ohms

2. If the resistance is greater, at least one Injector is faulty.
3. To isolate a faulty Injector, disconnect the individual electrical connectors from the Injectors, one at a time, and retest. The resistance should increase each time an Injector is disconnected.
4. Resistance readings at the main electrical connector should be:

4 Injectors - 3.7 to 5.0 ohms
3 Injectors - 5.0 to 6.7 ohms
2 Injectors - 7.5 to 10.0 ohms
1 Injector - 15.0 to 20.0 ohms

5. If the resistance does not increase when a particular Injector is disconnected, check the resistance directly at that Injector. The resistance for a single Injector should be between:

15 and 20 ohms

6. If the resistance reading at the Injector is OK, check the wiring between the main connector and the Injector connector. If the resistance reading at the Injector is not within specifications, the Injector is faulty and should be replaced.

Injector Signal LED Test:

7. To check if the Injectors are receiving voltage signals, connect an LED test light to the wiring harness connector. With the transmission in neutral and the parking brake set, activate the starter and check that the LED flickers.
8. If not, test for a fault in the wiring harness from the Digifant II control unit to the Injector connector. If the wiring to the Injector is OK check the Digifant II control unit refer to COMPUTERIZED ENGINE CONTROLS