W/Harness Inspection

Engine Control

P0273 Cylinder 5 Injector Circuit Low - W/Harness Inspection

Terminal and Connector Inspection

1. Many malfunctions in the electrical system are caused by poor harness and terminals. Faults can also be caused by interference from other electrical systems, and mechanical or chemical damage.
2. Thoroughly check connectors for looseness, poor connection, bending, corrosion, contamination, deterioration, or damage.
3. Has a problem been found?






Power Circuit Inspection

Check voltage
1. IG "OFF" and disconnect injector connector.
2. IG "ON".
3. Measure voltage between power terminal of injector harness connector and chassis ground.

Specification : Approx. B+




4. Is the measured voltage within specification?






Control Circuit Inspection

Check short to ground in harness
1. IG "OFF" and disconnect injector connector.
2. IG "ON".
3. Measure voltage between control terminal of injector harness connector and chassis ground.

Specification : Approx 3.5 V




4. Is the measured voltage within specification?