Hyundai Santa Fe (2006 year). Manual — part 372
FL -98
FUEL SYSTEM
DTC P0048 VGT VACUUM MODULATOR CIRCUIT HIGH
COMPONENT LOCATION
E31DDD68
Refer to DTC P0047.
GENERAL DESCRIPTION
E79C2EC2
Refer to DTC P0047.
DTC DESCRIPTION
E1025927
P0048 is set when excessive current is detected in VGT actuator control circuit for more than 1 sec.. This code is due to
short to battery in control circuit or internal short of VGT actuator component.
DTC DETECTING CONDITION
EBDE4E4B
Item
Detecting Condition
Possible Cause
DTC Strategy
• Signal monitoring
Enable Conditions
• IG KEY "ON"
Threshold Value
• Short to battery
Diagnostic Time
• 1 sec.
Fuel cut
NO
EGR Off
YES
Fuel Limit
YES
Fail Safe
Check
Lamp
NO
• VGT actuator circuit
• VGT actuator component
SPECIFICATION
E44EFFDF
Refer to DTC P0047.
SCHEMATIC DIAGRAM
E9230DEB
Refer to DTC P0047.
SIGNAL WAVEFORM AND DATA
E944A3C3
Refer to DTC P0047.
MONITOR SCANTOOL DATA
EEB997ED
Refer to DTC P0047.
TERMINAL AND CONNECTOR INSPECTION
EFCF8A29
Refer to DTC P0047.
DTC TROUBLESHOOTING PROCEDURES
FL -99
POWER CIRCUIT INSPECTION
E7D4F518
1.
Check power circuit voltage
1)
IG KEY "OFF", ENGINE "OFF"
2)
Disconnect VGT actuator connector
3)
IG KEY "ON"
4)
Measure the voltage of terminal 1 of VGT actuator.
Specification : 11.5V~13.0V
5)
Is the measured voltage within the specification?
YES
▶
Go to "Control Circuit Inspection".
NO
▶
Repair E/R FUSE
&
RELAY BOX 15A SENSOR #2 FUSE and related circuit and go to "Verification of Vehicle
Repair".
CONTROL CIRCUIT INSPECTION
E6DBA293
1.
Check monitoring voltage in control circuit
1)
IG KEY "OFF", ENGINE "OFF"
2)
Disconnect VGT actuator connector
3)
IG KEY "ON"
4)
Measure the voltage of terminal 2 of VGT actuator.
Specification : 3.2V~3.7V
5)
Is the measured voltage within the specification?
YES
▶
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 VGT actuator connector and ECM connector.
3)
Check continuity between VGT actuator connector terminal 2 and ECM connector (C230-K) terminal 29.
FL -100
FUEL SYSTEM
specification : Continuity ( below 1.0
Ω
)
4)
Is the measured resistance within the specification?
YES
▶
Repair short to ground and go to "Verification of Vehicle Repair".
NO
▶
Repair open in control circuit and go to "Verification of Vehicle Repair".
COMPONENT INSPECTION
EB0EB6D3
1.
Check VGT actuator component resistance
1)
IG KEY "OFF", ENGINE "OFF"
2)
Disconnect VGT actuator connector.
3)
Measure the resistance between VGT actuator component terminal 1 and 2.
Specification : 14.7 ~ 16.1
Ω
(20
℃
)
1
2
LFIG373A
4)
Is VGT actuator component resistance within the specification?
YES
▶
Go to "2.Check VGT actuator operation" as follows.
NO
▶
Replace VGT actuator and go to "Verification of Vehicle Repair".
2.
Check VGT actuator operation
1)
IG KEY "ON", ENGINE "ON".
2)
Check that VGT actuator operating duty is 76% after warming engine up.
3)
Check if vacuum generates after disconnecting VGT valve vacuum hose.
4)
Check if vacuum generates when decelerating after rapid acceleration (Vacuum must not generates, correct VGT
actuator operating duty is 45%).
DTC TROUBLESHOOTING PROCEDURES
FL -101
Specification : VGT actuator duty 76% : vacuum generates
VGT actuator duty 45% : vacuum does not generate
YES
▶
Go to "Verification of Vehicle Repair".
NO
▶
Replace VGT actuator and go to "Verification of Vehicle Repair".
※
Repeat this process 2~3 times.
VERIFICATION OF VEHICLE REPAIR
E4F82FD7
Refer to DTC P0047.
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