W/Harness Inspection

Engine Control
P0191 Fuel Rail Pressure Sensor Circuit Range/Performance - Inspection/Repair:_:W/Harness Inspection

Terminal & 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?






FPS Circuit Inspection

Check Open or Short in FPS circuit
1. IG KEY "OFF".
2. Disconnect FPS connector.
3. IG KEY "ON" & ENG "OFF".
4. Measure the voltage between signal, ground, power terminal of FPS harness connector and chassis ground.

Specification :
Signal Terminal : Approx. 5V
Ground Terminal : Approx. 0V
Power Terminal : Approx. 5V




5. Is the measured voltage within specification?