Hyundai: Engine D4FA. Manual — part 118
DIESEL CONTROL SYSTEM
FLA -343
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 A/C relay and ECM connector.
3)
Check continuity between glow relay terminal 5 and ECM connector terminal 70.
specification : Continuity ( below 1.0Ω )
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
E791613B
1.
Check A/C relay component resistance
1)
IG KEY "OFF", ENGINE "OFF".
2)
Disconnect A/C relay.
3)
Measure the coil resistance of A/C relay.
specification : 85±5 Ω (20℃)
30
87
86
85
EGNG001H
4)
Is the measured resistance within the specification?
YES
▶ Go to "2. Check A/C relay component operation" as follows.
FLA -344
FUEL SYSTEM
NO
▶ Replace A/C relay and go to "Verification of Vehicle Repair".
2.
Check A/C relay component operation
1)
IG KEY "OFF", ENGINE "OFF".
2)
Disconnect A/C relay
3)
Supplies random B+ and ground to coil sides of A/C relay ( terminal 85, terminal 86)
4)
Check continuity between A/C relay terminal 30 and terminal 87.
specification : When power is supplied : Continuity ( below 1.0Ω )
When power is not supplied : Discontinuity ( Infinite Ω )
30
87
86
85
B+
EGNG001I
5)
Is the continuity test within the specification?
YES
▶ Go to "Verification of Vehicle Repair".
NO
▶ Replace A/C relay and go to "Verification of Vehicle Repair".
※ Repeat this process 2~3 times.
VERIFICATION OF VEHICLE REPAIR
E398F248
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.
DIESEL CONTROL SYSTEM
FLA -345
NO
▶ System operates within specification.
FLA -346
FUEL SYSTEM
DTC P0647 A/C CLUTCH RELAY CONTROL CIRCUIT HIGH
COMPONENT LOCATION
E3EE5FD9
Refer to DTC P0646.
GENERAL DESCRIPTION
E0149D6E
Refer to DTC P0646.
DTC DESCRIPTION
E2F37569
P0647 is set when excessive current is detected in Aircon relay control circuit for more than 1 sec.. This code is due to
short to battery in Aircon relay control circuit or internal short in relay component.
DTC DETECTING CONDITION
EAE75FD0
Item
Detecting Condition
Possible Cause
DTC Strategy
• Voltage monitoring
Enable Conditions
• IG KEY "ON"
ThresholdValue
• Short to battery
DiagnosticTime
• 1.0 sec.
Fuel Cut
NO
EGR Off
NO
Fuel Limit
NO
Fail Safe
MIL
NO
• A/C relay circuit
• A/C relay component
SCHEMATIC DIAGRAM
ECB373DD
Refer to DTC P0646.
MONITOR SCANTOOL DATA
EDA365F5
1.
Connect scantool to Data Link Cable (DLC).
2.
Warm engine up to normal operating temperature.
3.
Turn "OFF" electrical devices and A/C.
4.
Monitor "A/C COMPRESSOR CONTROL" parameter on the scantool.
specification : A/C switch "ON" : A/C RELAY "ON" (Aircon compressor turns ON and OFF
periodically by Aircon pressure S/W. )
A/C switch "OFF" : A/C RELAY "OFF"
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