Many malfunctions in the electrical system are caused by poor harness(es) and terminals. Faults can also be caused by interference from other electrical systems, and mechanical or chemical damage.
Thoroughly check connectors for looseness, poor connection, bending, corrosion, contamination, deterioration, or damage.
Has a problem been found?
YES
Repair the trouble causing part and go to "Verification of Vehicle Repair"
NO
Go to "Power Circuit Inspection" as follows
Ignition "OFF", Turn Engine "OFF"
Disconnect Rail Pressure Sensor connector (C203)
Ignition "ON"
Measure the voltage of terminal "1" of Rail Pressure Sensor connector.
Specification : 4.8V~5.1V
Is the measured voltage within the specification ?
YES
Go to "Component Inspection"
NO
When voltage is lower than the specified value.
☞ Refer to P1524 Circuit Inspection
When voltage is higher than the specified value
☞ Refer to P1525 Circuit Inspection