2.
Is the injector operated normally?
 | ▶ Go to "Injector leakage inspection" procedure as below. |
 | ▶ Go to "Injector resistance and circuit inspection" procedure as below. |
Hold the injector with hand and check the operation of the injector while starting.
Is the injector operated normally?
| ▶ Go to "Injector leakage inspection" procedure as below. |
| ▶ Go to "Injector resistance and circuit inspection" procedure as below. |
Measure resistance between power terminal and control terminal of the injector after disconnecting injector connector.
■ Specification : 13.8~15.2Ω (20℃)
Is the injector resistance within specification ?
| ▶ Go to "Injector power circuit inspection" procedure as below. |
| ▶ Replace the injector. |
Remove Injector and delivery pipe assembly.
Check fuel leakage from injector while "Fuel pump" actuation test.
Is there fuel leakage from injector?
| ▶ Go to "Injector power circuit inspection" procedure as below. |
| ▶ Go to "Fuel supply state inspection" procedure. |
Measure the voltage between power terminal of the injector harness connector and chassis ground at IG key "ON".
■ Specification : B+
Is voltage within the specification?
| ▶ Go to "Injector control circuit inspection" procedure as below. |
| ▶ Thoroughly check connectors for looseness, poor connection, bending, corrosion, contamination, deterioration, or damage. ▶ Check for open circuit between power terminal of the injector harness connector and ECM harness connector. ▶ Check for short to ground in power circuit between power terminal of the injector harness connector and ECM harness connector. |
Measure the voltage between control terminal of the injector harness connector and chassis ground at IG key "ON".
■ Specification : Approx. 4.36 V
Is voltage within the specification?
| ▶ Go to "Injector waveform inspection" procedure as below. |
| ▶ Thoroughly check connectors for looseness, poor connection, bending, corrosion, contamination, deterioration, or damage. ▶ Check for open circuit between control terminal of the injector harness connector and ECM harness connector. ▶ Check for short to ground in control circuit between control terminal of the injector harness connector and ECM harness connector. ▶ Substitute with a known-good injector and check for proper operation. If the problem is corrected, Replace the ECM. |
Select oscilloscope function and Measure the waveform of the control terminal of the injector harness connector at IG key "START".
■ Specification
Is the injector waveform displayed normally?
| ▶ Go to "Fuel supply state inspection" procedure. |
| ▶ Thoroughly check connectors for looseness, poor connection, bending, corrosion, contamination, deterioration, or damage. ▶ Check for open circuit between control terminal of the injector harness connector and ECM harness connector. ▶ Check for short to ground in control circuit between control terminal of the injector harness connector and ECM harness connector. ▶ Substitute with a known-good injector and check for proper operation. If the problem is corrected, Replace the ECM. |
