Hyundai Santa Fe (2006 year). Manual — part 375
FL -110
FUEL SYSTEM
Fig.1
Fig.2
Fig.4
Fig.3
Fig.1) Fuel pressure and Fuel pressure regulator valve data at idle.
Fig.2) Fuel pressure and Rail pressure regulator valve data at idle.
Fig.3) Fuel pressure and Fuel pressure regulator valve data at acceleration.
Fig.4) Fuel pressure and Rail pressure regulator valve data at acceleration.
SCMFL6207L
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.
VERIFICATION OF VEHICLE REPAIR
EBA939A2
After a repair, it is essential to verify that the fault is corrected.
1.
After connecting Scantool select "DIAGNOSTIC TROUBLE CODES(DTCs)" mode.
2.
Clear recorded DTC using Scantool.
3.
Drive the vehicle within DTC "Enable conditions" in "General information".
4.
After selecting "DIAGNOSTIC TROUBLE CODES(DTCs)" mode and check if DTC is recorded again.
5.
Are any DTCs recorded ?
DTC TROUBLESHOOTING PROCEDURES
FL -111
YES
▶
Go to the DTC guide of recorded NO. in Scantool.
NO
▶
System operates within specification.
FL -112
FUEL SYSTEM
DTC P0088 RAIL PRESSURE MONITORING-MAXIMUM PRESSURE
EXCEEDED
COMPONENT LOCATION
E95DA808
Refer to DTC P0087.
GENERAL DESCRIPTION
E4AFDB7F
Refer to DTC P0087.
DTC DESCRIPTION
E6A7625E
P0088 is set if 1)rail pressure is higher than target rail pressure by more than 200bar for more than 0.8 sec. at rail pressure
regulator valve(PPRV) operating condition or 2)rail pressure is above upper limit value(1750bar) for more than 0.24 sec.
at rail pressure regulator valve(PPRV) operating condition.This code is due to 1)fuel more than target value supplied to
common rail or 2)poor return of fuel supplied to common rail or 3)short to high voltage line in rail press. sensor.
DTC DETECTING CONDITION
E2791FDA
Item
Detecting Condition
Possible Cause
DTC Strategy
• Voltage monitoring
Enable Conditions
• Engine running
Threshold Value
• Rail pressure is above target rail pressure by more
than 200bar at rail pressure regulator valve(PPRV)
operating condition.- 0.8 sec.
• Rail pressure is above upper limit value(1750bar)
at rail pressure regulator valve(PPRV) operating
condition. - 0.24 sec.
Diagnostic Time
• Refer to threshold Value.
Fuel cut
NO
EGR Off
NO
Fuel Limit
YES
Fail Safe
Check
Lamp
YES
• Engine shut down
• fuel pressure regulator
valve (open stuck)
• rail pressure regulator valve
(close stuck)
• Rail pressure sensor(Output
fixed at high voltage line)
MONITOR SCANTOOL DATA
EB518E8A
Refer to DTC P0087.
VERIFICATION OF VEHICLE REPAIR
EC3D3546
Refer to DTC P0087.
DTC TROUBLESHOOTING PROCEDURES
FL -113
DTC P0089 RAIL PRESSURE REGULATOR VALVE CIRCUIT OVER
CURRENT
COMPONENT LOCATION
E438AB9C
Rail Pressure Regulator Valve
LFIG216A
GENERAL DESCRIPTION
ED7CB6C0
Rail press. regulator valve(RPRV) is installed in common rail and controls common rail pressure fast as regulating return-
ing quantity of fuel which is delivered to common rail when fast rise of rail pressure is required like the moment of turning
engine ON or when fast relief of pressure is required like at the point of deceleration.The lower RPRV current is, the more
fuel is supplied to common rail. Thus it leads rail pressure to be high. On the contrary, the higher RPRV current is, the
less fuel is supplied to common rail.
DTC DESCRIPTION
E78F4221
P0089 is set when excessive current in control circuit of Rail Pressure regulator valve(integrated with common rail) is
detected for more than 0.28 sec.. This code is due to short to battery in control circuit or Rail Pressure regulator valve
internal short.
DTC DETECTING CONDITION
E60B09A8
Item
Detecting Condition
Possible Cause
DTC Strategy
• Voltage monitoring
Enable Conditions
• IG KEY "ON"
Threshold Value
• Short to battery in control circuit
Diagnostic Time
• 0.28 sec.
Fuel cut
YES
EGR Off
NO
Fuel Limit
NO
Fail Safe
Check
Lamp
YES
• RPRV circuit
• RPRV component
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