W/Harness Inspection

Engine Control
P0203 Injector Circuit/Open-Cylinder 3 - Inspection/Repair:_: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 ?






Control Circuit Inspection

Check waveform
1. IG "OFF".
2. Connect the probe to High/Low side of the injector circuit and select the oscilloscope in the menu
3. ENG "ON".
4. Check the waveform between High/Low side terminal of the injector circuit and chassis ground.

Specification :refer to Signal Waveform & Data




5. Is the measured waveform within specification ?