Hyundai: Engine D4FA. Manual — part 67
DIESEL CONTROL SYSTEM
FLA -139
DTC P0098 INTAKE AIR TEMPERATURE SENSOR 2 CIRCUIT HIGH INPUT
COMPONENT LOCATION
E2314274
Refer to DTC P0097.
GENERAL DESCRIPTION
E647739B
Refer to DTC P0097.
DTC DESCRIPTION
E91B78A4
P0098 is set when the voltage above 4965mV - maximum output voltage of IATS(integrated with BPS) - is detected for
more than 2.0 sec.. This code is due to 1) open or 2) short to ground or 3) short to battery in IATS signal circuit.
DTC DETECTING CONDITION
E2CDDBEB
Item
Detecting Condition
Possible Cause
DTC Strategy
• Voltage monitoring
Enable Conditions
• IG KEY "ON"
ThresholdValue
• Output signal above maximum value( above 4965mV )
DiagnosticTime
• 2.0 sec.
Fuel Cut
NO
EGR Off
NO
Fuel Limit
NO
Fail Safe
MIL
NO
• IATS circuit
• IATS component
SPECIFICATION
E9856A34
Refer to DTC P0097.
SCHEMATIC DIAGRAM
EA3DB456
Refer to DTC P0097.
SIGNAL WAVEFORM AND DATA
E3D96A76
Refer to DTC P0097.
MONITOR SCANTOOL DATA
EC505B2F
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 "AIR TEMPERATURE SENSOR" parameter on the Scantool.
specification : current intake air temperture is displayed.
FLA -140
FUEL SYSTEM
Fig.1
Fig.1) Check if current temperature is same as the value displayed on the Scantool.
EGNG008A
TERMINAL AND CONNECTOR INSPECTION
E4DC10AC
Refer to DTC P0097.
SIGNAL CIRCUIT INSPECTION
E10FE190
1.
Check signal circuit voltage
1)
IG KEY "OFF", ENGINE "OFF".
2)
Disconnect BPS connector.
3)
IG KEY "ON"
4)
Check the voltage of BPS connector terminal 3.
Specification : 4.8V~5.1V
5)
Is the measured voltage within the specificaiton?
YES
▶ Go to "Ground Circuit Inspection".
NO
▶ Go to "2.Check open in signal circuit" as follows.
2.
Check open in signal circuit
1)
IG KEY "OFF", ENGINE "OFF".
2)
Disconnect BPS connector and ECM connector.
3)
Check continuity between BPS connector terminal 3 and ECM connector terminal 53.
Specification : Continuity (below 1.0Ω )
DIESEL CONTROL SYSTEM
FLA -141
4)
Is the measured resistance within the specification?
YES
▶ Go to "3. Check short to battery in signal circuit" as follows.
NO
▶ Repair open 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 BPS connector and ECM connector.
3)
IG KEY "ON"
4)
Check the voltage of BPS connector terminal 3.
Specification : 0.0V~0.1V
5)
Is the measured voltage within the specification?(with both connector disconnected)
YES
▶ Repair short to battery in signal circuit and go to "Verification of Vehicle Repair".
NO
▶ Go to "Ground Circuit Inspection".
GROUND CIRCUIT INSPECTION
E75B427C
1.
IG KEY "OFF", ENGINE "OFF".
2.
Disconnect BPS connector.
3.
IG KEY "ON".
4.
Measure the voltage of BPS connector terminal 3. [ TEST "A" ]
5.
Measure the voltage between BPS connector terminal 3 and 4. [ TEST "B" ]
( terminal 3 : Check + prove , terminal 4 : Check - prove )
Specification : [TEST "A"] Voltage - [TEST "B"] Voltage = below 200mV
6.
Is the measured voltage within the specification?
YES
▶ Go to "Component Inspection".
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".
FLA -142
FUEL SYSTEM
COMPONENT INSPECTION
ECFAA528
1.
IG KEY "OFF", ENGINE "OFF".
2.
Disconnect BPS connector.
3.
Measure resistance between IATS component terminal 3 and 4, referring to resistance characteristic table of speci-
fication of General information.
Specification : Refer to Specification of General Information
EGNG008B
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 BPS assy’ and go to "Verification of Vehicle Repair".
VERIFICATION OF VEHICLE REPAIR
E421AC33
Refer to DTC P0097.
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