Ignition switch "OFF"

Connect VMI to GDS and set up the Oscilloscope.(2 Channel):

Channel A (+) : Pin No. 1 (Control) terminal (RPRV Harness Connector)

Channel A (-) : Ground

Ignition switch "ON" & Engine "OFF"

Inspection condition : Ignition switch "ON" & Engine idle & Engine RPM approx. 2000RPM & W.O.T.

Fig.1) Rail pressure regulator valve control duty when ignition switch is "ON"

※ Measured value can vary depending on condition of testing vehicle.

Fig.2) Rail pressure regulator valve control duty when engine idle

※ Measured value can vary depending on condition of testing vehicle.

Fig.3) Rail pressure regulator valve control duty when engine RPM is approx. 2000RPM

※ Measured value can vary depending on condition of testing vehicle.

Fig.4) Rail pressure regulator valve control duty when engine W.O.T.

※ Measured value can vary depending on condition of testing vehicle.

Is the measured value within specification?

	▶ Go to "Rail Pressure Regulator Valve(RPRV) Coil Resistance Inspection" procedure.
	▶ Carefully re-do this troubleshooting guide steps. ▶ If no problems were found with the circuits or connectors, replace the RPRV and go to "Verification of Vehicle Repair" procedure.

Ignition switch "OFF"

Disconnect batter (-) cable.

Refer to "Shop Manual" and disconnect RPRV connector.

Measure the resistance between Pin No. 2 (Power) terminal and Pin No. 1 (Control) terminal of RPRV.

Is the measured value within specification?

	▶ Fault is intermittent caused by poor contact in the sensor’s and/or ECM’s connector or was repaired and ECM memory was not cleared. Thoroughly check connectors for looseness, poor connection, bending, corrosion, contamination, deterioration, or damage. Repair or replace as necessary and go to "Verification of vehicle Repair" procedure.
	▶ Carefully re-do this troubleshooting guide steps. ▶ If no problems were found with the circuits or connectors, replace the RPRV and go to "Verification of Vehicle Repair" procedure.