Hyundai Santa Fe (2006 year). Manual — part 495
FLA -46
FUEL SYSTEM
KNOCK SENSOR (KS)
INSPECTION
EC4B1DA6
FUNCTION AND OPERATION PRICIPLE
Knocking is a phenomenon characterized by undesirable
vibration and noise and can cause engine damage. Knock
Sensor (KS) senses engine knocking and the two sensors
are installed inside the V-valley of the cylinder block. When
knocking occurs, the vibration from the cylinder block is
applied as pressure to the piezoelectric element. At this
time, this sensor transfers the voltage signal higher than
the specified value to the PCM and the PCM retards the
ignition timing. If the knocking disappears after retarding
the ignition timing, the PCM will advance the ignition tim-
ing. This sequential control can improve engine power,
torque and fuel economy.
Sensor
Connector
EGRF251A
Housing
Connector
Nut
Spring Washer
Load Washer
Insulator
Terminal
Piezo-electricity element
Insulator
Sleeve
EGRF252A
SPECIFICATION
Item
Specification
Capacitance (pF)
950 ~ 1,350pF
GASOLINE ENGINE CONTROL SYSTEM
FLA -47
WAVEFORM
The knock sensor is installed at cycliner block to detect the vibration effectively during engine running.
The above waveform shows the signal waveform of knock sensor when knock dosen't happen. Generally, knock signal
has more noise than other sensor.
EGRF610B
CIRCUIT DIAGRAM
KS [Bank1]
PCM
C88-1
C30-B
PCM (C30-B)
KS [Bank1]
1
2
KS [Bank2]
1
2
KS [Bank2]
C88-2
1
21
2
22
3
23
4
24
5
25
6
26
7
27
8
28
9
29
10
30
11
31
12
32
13
33
14
34
15
35
16
36
17
37
18
38
19
39
20
40
41
61
42
62
43
63
44
64
45
65
46
66
47
67
48
68
49
69
50
70
51
71
52
72
53
73
54
74
55
75
56
76
57
77
58
78
59
79
60
80
PCM C30-B (56)
KS #1 [High] signal
3
PCM C30-B (23)
Shield ground
KS #1 [Low] signal
PCM C30-B (53)
KS #2 [High] signal
3
PCM C30-B (23)
Shield ground
PCM C30-B (54)
PCM C30-B (55)
KS #2 [Low] signal
Knock Sensor(KS) [Bank1] (C88-1)
2
56 - KS #1 [High]
55 - KS #1 [Low]
1
Knock Sensor(KS) [Bank2] (C88-2)
1
3
3
54 - KS #2 [Low]
53 - KS #2 [High]
23 - Sensor Shield
2
[CIRCUIT DIAGRAM]
[HARNESS CONNECTORS]
[CONNECTION INFORMATION]
Terminal
Connected to
Function
Terminal
Connected to
Function
1
2
3
1
2
3
SCMF16112L
FLA -48
FUEL SYSTEM
INJECTOR
INSPECTION
EBCA1EAE
FUNCTION AND OPERATION PRICIPLE
Based on information from various sensors, the PCM mea-
sures the fuel injection amount. The fuel injector is a sole-
noid-operated valve and the fuel injection amount is con-
trolled by length of time that the fuel injector is held open.
The PCM controls each injector by grounding the control
circuit. When the PCM energizes the injector by grounding
the control circuit, the circuit voltage should be low (the-
oretically 0V) and the fuel is injected. When the PCM
de-energizes the injector by opening control circuit, the
fuel injector is closed and circuit voltage should momen-
tarily peak.
CAUTION
If an injector connector is disconnected for more
than 46 seconds while the engine runs, the PCM
will determine that the cylinder is misfiring and
cut fuel supply. So be careful not to exceed 46
seconds. But the engine runs normally in 10 sec-
onds after turning the ignition key off.
KFCF1026
SPECIFICATION
Item
Specification
Coil Resistance (Ω )
13.8 ~ 15.2Ω at 20℃
(68℉)
GASOLINE ENGINE CONTROL SYSTEM
FLA -49
CIRCUIT DIAGRAM
PCM
C30-A
72 - Injector #1
PCM (C30-A)
Injector #1
Injector #1
(C37-1)
Injector #2
(C37-2)
Main Relay
2
1
63 - Injector #2
Main Relay
2
1
1
2
Injector #1,3,5
Injector #2,4,6
1
21
2
22
3
23
4
24
5
25
6
26
7
27
8
28
9
29
10
30
11
31
12
32
13
33
14
34
15
35
16
36
17
37
18
38
19
39
20
40
41
61
42
62
43
63
44
64
45
65
46
66
47
67
48
68
49
69
50
70
51
71
52
72
53
73
54
74
55
75
56
76
57
77
58
78
59
79
60
80
Main Relay
Battery Voltage (B+)
PCM C30-A (72)
Injector #1 control
Injector #2
1
2
Main Relay
Battery Voltage (B+)
Injector #3
1
2
Main Relay
Battery Voltage (B+)
PCM C30-A (64)
Injector #3 control
Injector #4
1
2
Main Relay
Battery Voltage (B+)
PCM C30-A (68)
Injector #4 control
Injector #5
1
2
Main Relay
Battery Voltage (B+)
PCM C30-A (69)
Injector #5 control
Injector #6
1
2
Main Relay
Battery Voltage (B+)
PCM C30-A (71)
Injector #6 control
64 - Injector #3
Injector #3
(C37-3)
Injector #4
(C37-4)
Main Relay
2
1
68 - Injector #4
Main Relay
2
1
69 - Injector #5
Injector #5
(C37-5)
Injector #6
(C37-6)
Main Relay
2
1
71 - Injector #6
Main Relay
2
1
[CIRCUIT DIAGRAM]
[HARNESS CONNECTORS]
[CONNECTION INFORMATION]
Terminal
Connected to
Function
Terminal
Connected to
Function
Terminal
Connected to
Function
Terminal
Connected to
Function
Terminal
Connected to
Function
Terminal
Connected to
Function
1
2
PCM C30-A (63)
Injector #2 control
C37-1,3,5
C37-2,4,6
SCMF16113L
COMPONENT INSPECTION
1.
Turn ignition switch OFF.
2.
Disconnect injector connector.
3.
Measure resistance between injector terminals 1 and
2.
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