W/Harness Inspection

Engine Control
P0090 Fuel Pressure Regulator 1 Control Circuit/Open - 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

Open Check
1. IG "OFF" & Disconnect fuel pressure regulator (spill valve) connector.
2. IG "ON".
3. Measure voltage between high/low terminal of fuel pressure regulator(spill valve) harness connector and chassis ground.

Specification :High - approx. 2.3V, Low - approx. 0V




4. Is the measured voltage within specification ?