Hyundai: Engine D4FA. Manual — part 75
DIESEL CONTROL SYSTEM
FLA -171
Specification : Continuity (below 1.0Ω )
4)
Is the measured resistance within the specification?
YES
▶ Go to "3.Check short to battery in signal circuit " as follows
NO
▶ Repair open spots in signal circuit and go to "Verification of Vehicle Repair".
3.
Check short to battery in signal circuit
1)
IG KEY "OFF", ENGINE "OFF".
2)
Disconnect MAFS connector and ECM connector
3)
IG KEY "ON"
4)
Measure the voltage of terminal 3 of MAFS connector.
Specification : 0.0V~0.1V
5)
Is abnormal voltage detected in the circuit with both connector disconnected?
YES
▶ Repair short to battery and go to "Verification of Vehicle Repair".
NO
▶ Go to "Ground Circuit Inspection".
GROUND CIRCUIT INSPECTION
EB5A491E
1.
IG KEY "OFF", ENGINE "OFF".
2.
Disconnect MAFS connector and ECM connector
3.
IG KEY "ON"
4.
Measure the voltage of terminal 3 of MAFS connector. [ TEST "A" ]
5.
Measure the voltage of MAFS terminal 3 and terminal 2. [ TEST "B" ]
( terminal 3 : Check + prove , terminal 2 : Check - prove )
Specification : the voltage difference between TEST "A" and TEST "B" is within 200mV
6.
Is the measured voltage within the specification?
YES
▶ Go to "Component Inspection".
FLA -172
FUEL SYSTEM
NO
▶ When "B" voltage is not detected : Repair open in ground circuit and go to "Verification of Vehicle Repair".
▶ When the voltage difference between "A" and "B" is above 200mV : Eliminate the causes of excessive resistance
and go to "Verification of Vehicle Repair".
COMPONENT INSPECTION
EAE176F7
1.
Ignition "OFF", Turn Engine "OFF".
2.
Disconnect MAFS connector.
3.
Measure resistance of IATS component terminal 3 and 2, referring to resistance characteristic table of specification
of General information.
Specification : Refer to Specification of General Information.
EGNG004S
4.
Is the measured resistance at certain temperature within the specified resisance range at the temperature?
YES
▶ Go to "Verification of Vehicle Repair".
NO
▶ Replace AFS ASSY’ and go to "Verification of Vehicle Repair".
VERIFICATION OF VEHICLE REPAIR
E16AFF01
Refer to DTC P0112.
DIESEL CONTROL SYSTEM
FLA -173
DTC P0117 ENGINE COOLANT TEMPERATURE CIRCUIT LOW INPUT
COMPONENT LOCATION
ED6BF22E
ECTS
EGNG012E
GENERAL DESCRIPTION
E0EEA0F0
Engine Coolant Temperature Sensor(ECTS), installed in coolant line, senses engine coolant temperature.With the infor-
mation about engine coolant temperature, ECM performs fuel injection quantity correction, cooling fan control and glow
relay operating duration control.Especially, because ECTS signal is main variable of fuel injection quantity correction when
engine is cold, sensor trouble makes starting engine difficult when engine is cold.If engine is running when ECTS is out
of order, ECM regards engine coolant temperature as 80℃. And during cranking, ECM considers engine coolant tem-
perature as -10℃. Besides, cooling fan, which is controlled based on ECTS signal, operates at HIGH-MODE to prevent
engine overheat and supplementary heater is deactivated.
DTC DESCRIPTION
EAC91BF0
P0117 is set when the voltage below 225mV - minimum output voltage of ECTS - is detected for more than 2.0 sec. This
code is due to short to ground in signal circuit.
FLA -174
FUEL SYSTEM
DTC DETECTING CONDITION
EC96666B
Item
Detecting Condition
Possible Cause
DTC Strategy
• Voltage monitoring
Enable Conditions
• IG KEY "ON"
ThresholdValue
• Output signal below the minimum value.(
below 225mV )
DiagnosticTime
• 2.0 sec.
Fuel Cut
NO
EGR Off
YES
Fuel Limit
NO
Fail Safe
MIL
NO
• A/C condensor fan control
operation based on engine
coolant temperature
inhibited.
• PTC heater inhibited.
• Cooling fan is fixed at
HIGH-MODE.
• during engine operation :
temperature is fixed at 80℃
at cranking : temperature
is fixed at -10℃
• ECTS circuit
• ECTS component
SPECIFICATION
E09C851C
Temperature
-40℃
-20℃
0℃
20℃
40℃
Resistance
48.14 ㏀
15.48±1.35㏀
5.790 ㏀
2.45±0.14㏀
1.148 ㏀
Temperature
60℃
80℃
100℃
110℃
120℃
Resistance
0.586 ㏀
0.322 ㏀
0.188 ㏀
0.147±0.002㏀
0.116 ㏀
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