Outline Of Diagnosis
Detect the malfunction of fuel injector circuit function.
Judge as NG when ECM detects any malfunction in the diagnostic items listed below.
| Diagnostic item | Malfunction Criteria |
|---|---|
| Power supply short | ECM low side terminal voltage of the fuel injector circuit is high. |
| Ground short | ECM low side terminal voltage of the fuel injector circuit is low. |
| Open circuit | Fuel injector current is low. |
| Overcurrent | Fuel injector current is high. |
| Short circuit | The time when the fuel injector current reaches the target current is short. |