Hyundai Santa Fe (2006 year). Manual - part 378

FL -122

FUEL SYSTEM

SIGNAL WAVEFORM AND DATA

E028F2AE

Fig.1

Fig.2

Fig.1) Waveform of rail pressure regulator valve at idle. It shows approx. 17% duty( (-) duty ).
Fig.2) Waveform of rail pressure regulator valve as accelerating. Approx. 50% duty is outputted as engine load increases.
         ( When rail pressure increases as accelerating, rail pressure regulator valve duty(current) rises.)          

LFIG377A

MONITOR SCANTOOL DATA

EF3C40CA

1.

Connect Scantool to Data Link Connector (DLC).

2.

Warm engine up to normal operating temperature.

3.

Turn "OFF" electrical devices and A/C.

4.

Monitor "FUEL PRESSURE MEASURED", "INJ. PUMP REGULATOR","RAIL PRESS. REGULATOR1" parameter on
the Scantool.

SPECIFICATION :

Idle(without load)

Accelerating(stall test)

Diagnosis

FUEL PRESSURE

MEASURED

27 ± 5 Mpa

above 75 Mpa

press. increases

INJ. PUMP REGULATOR

34 ± 3%

38 ± 3%

duty increases

RAIL PRESS.

REGULATOR1

16 ± 3%

45 ± 3%

duty increases

DTC TROUBLESHOOTING PROCEDURES

FL -123

Fig.1

Fig.2

Fig.2) Fuel pressure and Fuel pressure regulator valve data at idle.
Fig.3) Fuel pressure and Rail pressure regulator valve data at idle.
Fig.4) Fuel pressure and Fuel pressure regulator valve data at acceleration.
Fig.5) Fuel pressure and Rail pressure regulator valve data at acceleration.

Fig.3

Fig.4

LFIG375A

NOTE

The waveform of fuel pressure regulator valve installed at high pressure pump(fuel detecting MPROP) shows 34 ±
3% duty at idle, duty rises to approx. 38% at acceleration to raise rail pressure.

The waveform of rail pressure regulator valve installed at common rail shows 16 ± 3% duty at idle, duty rises to
approx. 45% at acceleration to raise rail pressure.

TERMINAL AND CONNECTOR INSPECTION

E45C2DFB

1.

Electrical systems consist of a lot of harness and connectors, poor connection of terminals can cause various prob-
lems and damge of component.

2.

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 seperation, damage of locking
device and

FL -124

FUEL SYSTEM

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. )

3.

Is the problem found?

YES

▶

Repair the trouble causing part and go to "Verification of Vehicle Repair".

NO

▶

Go to "Power Circuit Inspection".

POWER CIRCUIT INSPECTION

E2F918E5

1.

Check power circuit voltage

1)

IG KEY "OFF", ENGINE "OFF"

2)

Disconnect RPRV connector.

3)

IG KEY "ON"

4)

Measure the voltage of RPRV connector terminal 1.

specification : 11.5V~13.0V

5)

Is the measured voltage within the specification?

YES

▶

Go to "Control Circuit Inspection".

NO

▶

Repair open between rail pressure regulator valve connector terminal 1 and ECM connector(C230-A) terminal

4

CONTROL CIRCUIT INSPECTION

ECBDD16F

1.

Check monitoring voltage in control circuit

1)

IG KEY "OFF", ENGINE "OFF"

2)

Disconnect RPRV connector.

3)

IG KEY "ON"

4)

Measure the voltage of RPRV connector terminal 2.

specification : 3.2V~3.7V

5)

Is the measured voltage within the specification?

YES

DTC TROUBLESHOOTING PROCEDURES

FL -125

▶

Go to "Component Inspection"

NO

▶

When voltage is not detected : Go to "2. Check open in control circuit" as follows.

▶

When high voltage is detected : Repair short to battery and go to "Verification of Vehicle Repair".

2.

Check open in control circuit

1)

IG KEY "OFF", ENGINE "OFF"

2)

Disconnect RPRV connector and ECM connector.

3)

Check continuity between RPRV connector terminal 2 and ECM connector (C230-A) terminal 34.

specification : Continuity ( below 1.0

Ω

)

4)

Is the measured resistance within the specification?

YES

▶

Repair short to ground in RPRV control circuit and go to "Verification of Vehicle Repair".

NO

▶

Repair open in RPRV control circuit and go to "Verification of Vehicle Repair".

COMPONENT INSPECTION

E82ECC11

1.

Check RPRV component resistance

1)

IG KEY "OFF", ENGINE "OFF".

2)

Disconnect RPRV connector.

3)

Check RPRV component resistance.

Specification : 3.42 ~ 3.78

Ω

(20

℃

)

1

2

EGNG008I

4)

Is the measured resistance within the specification?

YES

▶

Go to "Verification of Vehicle Repair".

NO