Hyundai Santa Fe (2006 year). Manual — part 374
FL -106
FUEL SYSTEM
5)
Check if both "ATMOSPHERIC PRESSURE" and "BOOST PRESSURE SENSOR" indicates similar value at IG
KEY "ON".
Specification : Refer to "Monitor Scantool Data" .
6)
Is any BPS related problem is detected?
YES
▶
Replace BPS and go to "Verification of Vehicle Repair".
NO
▶
Go to "Verification of Vehicle Repair".
VERIFICATION OF VEHICLE REPAIR
EE191B53
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 ?
YES
▶
Go to the DTC guide of recorded NO. in Scantool.
NO
▶
System operates within specification.
DTC TROUBLESHOOTING PROCEDURES
FL -107
DTC P0087 RAIL PRESSURE MONITORING-MINIMUM PRESSURE AT
ENGINE SPEED TOO LOW
COMPONENT LOCATION
E7F91708
Fuel Pressure
Regulator Valve
FTS
Rail Pressure Regulator Valve
RPS
LFIG215A
GENERAL DESCRIPTION
E1C6FF62
As inputted rail pressure sensor signal, ECM of Commom rail diesel engine controls fuel metering unit(FPRV-intergrated
with high press. pump) and rail pressure control valve(RPRV-integrated with common rail) in order to maintain optimum
rail pressure according to current engine rpm and load. However when the problem that leads rail pressure to out of target
value intended by ECM occurs due to mechanical or electronical reason, ECM limits engine performance and sets DTC by
limiting fuel (stops injector operation) in order to prevent engine from being controlled abnormally. "rail pressure monitoring
error" is the DTC which diagnoses 1) supplying state of low pressure fuel and 2) mechanical operating conditions of high
pressure pump and 3). RPRV indirectly based on RPS output voltage and RPS duty. Thus, repair relavant to this DTC
requires mechanics the total understand of fuel system.
DTC DESCRIPTION
EE69C2CE
P0087 is set when rail pressure is lower than target rail pressure by more than 250bar for more than 2 sec. in condition
that rail press. is controlled by rail pressure regulator valve(RPRV) or rail pressure is below the lower limit value(200bar).
This code is due to 1)fuel less than target value supplied to common rail or 2)excessive return of fuel supplied to common
rail or 3)short to low voltage line in rail press. sensor.
FL -108
FUEL SYSTEM
DTC DETECTING CONDITION
E1AF079E
Item
Detecting Condition
Possible Cause
DTC Strategy
• Voltage monitoring
Enable Conditions
• Engine running
Threshold Value
• (Case1) : Rail pressure is below target rail pressure
by more than 250bar at rail pressure regulator
valve(RPRV) operating condition.
• (Case2) : Rail pressure is below minimum
limiting value(200bar) at rail pressure regulator
valve(RPRV) operating condition.
Diagnostic Time
• 2 sec.
Fuel cut
(Case1)
NO
(Case2)
YES
EGR Off
NO
Fuel Limit
(Case1)
YES
(Case2)
NO
Fail Safe
Check
Lamp
YES
• fuel pressure regulator
valve (close stuck)
• rail pressure regulator valve
(open stuck)
• Rail pressure sensor(Output
fixed at low voltage line)
MONITOR SCANTOOL DATA
ED817027
1.
Monitoring rail pressure data
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", "FUEL PRESS. S/POINT", "RAIL PRESS. REGULATOR1", "INJ.
PUMP REGULATOR" parameter on the Scantool.
Specification : FUEL PRESSURE MEASURED : similar to "FUEL PRESSURE-TARGET"
FUEL PRESS. S/POINT : 27 ± 5 Mpa
RAIL PRESS. REGULATOR1 : 16 ± 3%
INJ. PUMP REGULATOR : 34 ± 3%
DTC TROUBLESHOOTING PROCEDURES
FL -109
Fig.1
Fig.1) Monitor "FUEL PRESSURE MEASURED" at idle after warming engine up.
SCMFL6206L
Check if "FUEL PRESSURE MEASURED"data is similar to "FUEL PRESS. S/POINT". Not only former two data
but also "RAIL PRESS. REGULATOR1" and "INJ. PUMP REGULATOR"should be monitored carefully. Although
"FUEL PRESSURE MEASURED" is similar to "FUEL PRESS. S/POINT", if "RAIL PRESS. REGULATOR1" and
"INJ. PUMP REGULATOR" is out of specification, it means wear, leakage, stuck of fuel system.
2.
Monitoring rail pressure data at acceleration(loading condition).
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" param-
eter 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
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