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Electrical systems consist of a lot of harness and connectors, poor connection of terminals can cause various problems and damage of component.

Perform checking procedure as follows.

(1)

Check damage of harness and terminals : Check terminals for contact resistance, corrosion and deformation.

(2)

Check connecting condition of ECM and component connector : Check terminal separation, damage of locking device and connecting condition between terminal and wiring.

note

Disconnect the pin which requires checking at male connector and insert it to the terminal at female connector for checking connecting condition.(After checking, reconnect the pin at correct position.)

Is the problem found?

	▶ Repair the trouble causing part and go to "Verification of Vehicle Repair" procedure.
	▶ Go to "Power Circuit Inspection".

Check voltage between power terminal of 'RAIL PRESSURE VALVE' harness connector and chassis ground.

Specification : 10.5V ~ 14.5V

Is the measured value within specification?

▶ Go to "Control Circuit Inspection" procedure.

▶ If no voltage is detected, repair open between 'SNSR4 FUSE 15A' terminal of 'EMS BOX' and power ('Engine control relay 'ON') terminal of 'RAIL PRESSURE VALVE' harness connector, and go to "Verification of Vehicle Repair" procedure.

▶ If the voltage is high than specification value, repair short to battery between 'SNSR4 FUSE 15A' terminal of 'EMS BOX' and power ('Engine control relay 'ON') terminal of 'RAIL PRESSURE VALVE' harness connector, and go to "Verification of Vehicle Repair" procedure.

Check voltage between 'valve control' terminal of 'RAIL PRESSURE VALVE' harness connector and chassis ground.

Specification : 3.2V ~ 3.7V

Is the measured value within specification?

▶ Go to "Component Inspection" procedure.

▶ If no voltage is detected, go to "Check open in control circuit " as follows.

▶ If the voltage is higher than specification value, repair short to battery between 'Valve control' terminal of 'RAIL PRESSURE VALVE' harness connector and 'Valve control' terminal of ECM harness connector, and go to "Verification of Vehicle Repair" procedure.

Check between 'Valve control' terminal of 'RAIL PRESSURE VALVE' harness connector and 'Valve control' terminal of ECM harness connector.

Specification : Continuity (below 1.0Ω )

Is the measured value within specification?

	▶ Repair short to ground between 'Valve control' terminal of 'RAIL PRESSURE VALVE' harness connector and 'Valve control' terminal of ECM harness connector, and go to "Verification of Vehicle Repair" procedure.
	▶ Repair open between 'Valve control' terminal of 'RAIL PRESSURE VALVE' harness connector and 'Valve control' terminal of ECM harness connector, and go to "Verification of Vehicle Repair" procedure.