Hyundai: Engine D4FA. Manual — part 148
![](/vehicles/eread/rudso/ynd/juntt.png)
DIESEL CONTROL SYSTEM
FLA -463
DTC DETECTING CONDITION
EAAD54CE
Item
Detecting Condition
Possible Cause
DTC Strategy
• Voltage monitoring
Enable Conditions
• IG KEY "ON"
ThresholdValue
• When output signal is above the maximum
value (above 4910mV )
DiagnosticTime
• 180ms
Fuel Cut
NO
EGR Off
NO
Fuel Limit
YES
Fail Safe
MIL
YES
• APS standard value is 0%.
• Limp home idle is fixed
at (1200RPM)
• A/C operation stops
according to Vehicle/Engine
speed
• Cruise control deactivated
(for Cruise control option
applied vehicle)
• APS 1 Circuit
• APS component
SPECIFICATION
EB8404BF
Pedal released
Pedal depressed
Sensor Type
APS 1
0.7V~0.8V
3.8V~4.4V
APS 2
0.275V~0.475V
1.75V~2.35V
Variable resistance
type(Potentiometer)
![](/vehicles/eread/rudso/ynd/twe.png)
FLA -464
FUEL SYSTEM
SCHEMATIC DIAGRAM
EF2AD4E5
1
6
2
2
5
3
1
4
C101-2 terminal 31
APS 2 sensor signal
APS 1 sensor signal
C101-2 terminal 9
3
APS 2 sensor power
C101-2 terminal 46
4
APS 2 sensor ground
C101-2 terminal 8
5
APS 1 sensor ground
C101-2 terminal 30
6
APS 1 sensor power
C101-2 terminal 45
C101-2 ECM
E107 Accel pedal sensor
E107 Accel pedal sensor
45. APS 1 sensor power
46. APS 2 sensor power
30. APS 1 sensor ground
8. APS 2 sensor ground
9. APS 1 sensor signal
31. APS 2 sensor signal
C101-2 ECM
C101-1 ECM
1
30 29
31
32
38
39
36
37
35
33
34
40
42 41
46 45 44 43
48 47
50 49
2
3
4
6
5
8
7
12 11 10 9
13
14
15
18 17
19
16
22
25
27 26
23
20
21
24
28
51
75 74
53 52
73
79 78 77 76
80
81
83 82
84
86 85
87
89 88
90
92 91
93
94
57
69 68
70
71
64
54
55
56
61
58
59
60
63 62
65
66
67
72
3
2
1
6
5
4
[CIRCUIT DIAGRAM]
[HARNESS CONNECTOR]
[CONNECTOR INFORMATION]
Terminal
Terminal
Connected to
Connected to
Function
1
2
4
3
6
5
8 7
12
13
16
17
18
23 22
20
21
19
27 26 25 24
28
29
30
14
9
10
11
15
33 32 31
34
37
41
42
40 39 38
35
36
43
44
47 46
49 48
50
53
56
58 57
54
51
52
55
59
60
45
EGNG002H
SIGNAL WAVEFORM AND DATA
E9FCB379
APS 2 ground check
signal
APS 1
APS 2
Fig.1
Fig.1) APS 1 and APS 2 signals are measured simultaneously, Check if output value is rising and APS 2 is 1/2 of APS 1 signal.
EGNG014R
NOTE
APS 2 Ground checking signal is for ECM to monitor APS 2. This signal drops APS 2 output voltage to below
200.39mV per 200msec. If APS 2 output voltage does not drop to below 200.39mV, ECM sets DTC as recognizing
ground circuit error of APS 2 .
![](/vehicles/eread/rudso/ynd/thilig.png)
DIESEL CONTROL SYSTEM
FLA -465
※ The waveform below 200.39mV is not detectable in Ground checking signal waveform of APS 2 signal. Instead, the
waveform which drops a little is detected. If APS 2 data of "SERVICE DATA" on the Scantool varies from 350mV to 0mV
periodically, it means it works well.
MONITOR SCANTOOL DATA
EBE0377E
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 "ACCEL PEDAL SENSOR", "ACCEL PEDAL SENSOR 1", "ACCEL PEDAL SENSOR 2 " parameter on the
scantool.
Specification : at idle( 0% ) ACCEL PEDAL SENSOR 1 : 600mV~800mV
ACCEL PEDAL SENSOR 2 : 1/2 of ACCEL PEDAL SENSOR 1
Fig.1
Fig.1) APS output data at warm idle. Check if output value is rising and "ACCEL PEDAL SENSOR 2" is 1/2 of
"ACCEL PEDAL SENSOR 1" signal.
EGNG002J
TERMINAL AND CONNECTOR INSPECTION
EDAA39CF
1.
Electrical systems consist of a lot of harness and connectors, poor connection of terminals can cause various prob-
lems and damage of component.
2.
Perform checking procedure as follows.
1)
Check damage of harness and terminals : Check terminals for contact resistance, corrosion and deformation.
2)
Check connecting condition of ECM and component connector : Check terminal seperation, damage of locking
device and connecting condition between terminal and wiring.
NOTE
Disconnect the pin which requires checking at mail connector and insert it to the terminal at female connector for
checking connecting condition. ( after checking, reconnect the pin at correct position )
3.
Is the problem found?
FLA -466
FUEL SYSTEM
YES
▶ Repair the trouble causing part and go to "Verification of Vehicle Repair".
NO
▶ Go to "Power Circuit Inspection" as follows.
POWER CIRCUIT INSPECTION
E8E689F1
1.
IG KEY "OFF", ENGINE "OFF".
2.
Disconnect APS connector.
3.
IG KEY "ON".
4.
Measure the voltage of terminal 6 of APS connector.
Specification : 4.8V~5.1V
5.
Is the measured voltage within the specification?
YES
▶ Go to "Signal Circuit Inspection".
NO
▶ If the measured voltage is not within the specified value, find and repair short to battery in APS 1 power circuit and
go to "Verification of Vehicle Repair".
SIGNAL CIRCUIT INSPECTION
EAE98BD2
1.
Check open in signal circuit
1)
IG KEY "OFF", ENGINE "OFF".
2)
Disconnect APS connector and ECM connector.
3)
Check continuity between APS connector terminal 2 and ECM connector terminal 9
Specification : Continuity (below 1.0Ω )
4)
Is the measured resistance within the specification?
YES
▶ Go to "Check short to battery in signal circuit" as follows.
NO
▶ Repair open in signal circuit and go to "Verification of Vehicle Repair".
2.
Check short to battery in signal circuit
1)
IG KEY "OFF", ENGINE "OFF".
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