Hyundai: Engine D4FA. Manual — part 96
DIESEL CONTROL SYSTEM
FLA -255
DTC P0340 CAMSHAFT POSITION SENSOR A CIRCUIT MALFUNCTION
(BANK 1 OR SINGLE SENSOR)
COMPONENT LOCATION
E617D2D3
CKPS
CMPS
EGNG005I
GENERAL DESCRIPTION
EE657C80
Cam Shaft Position Sensor(CMPS) is hall sensor type. Sensing the teeth attatch at the end of exhaust cam shaft, CMPS
detects rotation of Cam shaft (1 signal per 1 lotation)As Cam shaft rotates once while Crank shaft does twice, CMPS
referrence point generates once while CKPS’ do twice.As this signal inputted to ECM, it distinguishes crank angle and the
cylinder which requires fuel injection in order to determine injection sequence and duration.
DTC DESCRIPTION
E41B283B
P0340 is set when CKPS signal is outputted while CMPS signal does not generate for more than 0.7 sec.. This code is
due to the failure relevant to CMPS related circuit and sensor component.
DTC DETECTING CONDITION
E7865094
Item
Detecting Condition
Possible Cause
DTC Strategy
• Signal monitoring
Enable Conditions
• Engine running(during accelerating)
ThresholdValue
• CKPS signal is outputted while CMPS signal
does not generate.
DiagnosticTime
• 700ms
Fuel Cut
NO
EGR Off
NO
Fuel Limit
YES
Fail Safe
MIL
YES
Engine does not turn "ON"
at starting.
• CMPS circuit
• CMPS component
FLA -256
FUEL SYSTEM
SPECIFICATION
ECCF378D
Sensor Type
Output Signal
Characteristic
Air Gab
LOW Signal
Detecting Voltage
HIGH Signal
Detecting Voltage
Hall effect type
0V~5V Digital signal
output
1.25mm
below 2.0V
above 3.8V
SCHEMATIC DIAGRAM
E2482EDE
1
1
2
2
3
3
C142 J/C terminal 9
Sensor signal
Sensor power
Sensor ground
C101-1 terminal 50
C101-1 terminal 20
50. Sensor signal
15A INJ FUSE (Main relay power)
20. Sensor ground
C101-1 ECM
C105 CMPS
H
C105 CMPS
1
2
3
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
[CIRCUIT DIAGRAM]
[HARNESS CONNECTOR]
[CONNECTOR INFORMATION]
Terminal
Terminal
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
EGNG005J
DIESEL CONTROL SYSTEM
FLA -257
SIGNAL WAVEFORM AND DATA
E8E228EE
Fig.1
Fig.2
Fig.1) This shows waveform of Crank Shaft Position Sensor and Cam Shaft Position Sensor simulatneously.
The middle area indicates reference points of Crank Shaft Position Sensor and Cam Shaft Position Sensor.
Fig.2) Crank Shaft Position Sensor and Cam Shaft Position Sensor signal are measured simultaneously.
Cam Shaft Position Sensor signal is outputted once when Crank Shaft Position sensor signal is outputted twice.
LOW and HIGH output of Cam Shaft Position sensor reference point is detected at Crank Shaft Position sensor reference
point.
( Injection sequence is determined based on LOW and HIGH signal of Cam Shaft Position Sensor reference point as
detecting cylinder position.)
EGNG005K
※ SIGNAL ANALYSIS
5.0V
3.8V
2.0V
0.0V
Falling edge
Vo
Rising edge
High-signal detecting range
Hysteresis range
Low-signal detecting range
T
EGNG005L
1.
ECM recognizes HIGH signal as LOW signal when CMPS signal drops below 2.0V and LOW signal as HIGH signal
when CMPS signal rises above 3.8V.
2.
V0 - the Minimum voltage of LOW signal does not drop below 0.0V due to the hall sensor inside resistance. When
the Minimum voltage of LOW signal is above 0.6V during signal waveform inspection, check excessive resistance
inside of CMPS component or in ground circuit.
MONITOR SCANTOOL DATA
E72206B9
1.
Connect Scantool to Data Link Connector (DLC).
2.
Warm engine up to normal operating temperature.
3.
Turn "OFF" electrical devices and A/C.
FLA -258
FUEL SYSTEM
4.
Monitor "ENGINE SPEED SENSOR" parameter on the Scantool.
Specification : 800±50RPM at idle
Fig.1) Check "ENGINE SPEED SENSOR" parameter carefully after warming engine up, also check engine stall and rpm instability
or engine shut down.
Fig.1
EGNG005M
TERMINAL AND CONNECTOR INSPECTION
EC09A43F
1.
Electrical systems consist of a lot of harness and connectors, poor connection of terminals can cause various prob-
lems and damge 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 male connector and insert it to the terminal at female connector or
checking connecting condition. ( after checking, reconnect the pin at correct position. )
3.
Is the problem found?
YES
▶ Repair the trouble causing part and go to "Verification of Vehicle Repair".
NO
▶ Go to "Power Circuit Inspection".
POWER CIRCUIT INSPECTION
E0635D22
1.
IG KEY "OFF", ENGINE "OFF".
2.
Disconnect CMPS connector.
3.
IG KEY "ON".
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