Hyundai Santa Fe (2006 year). Manual — part 494
FLA -42
FUEL SYSTEM
HEATED OXYGEN SENSOR
(HO2S)
INSPECTION
E1DADE40
FUNCTION AND OPERATION PRICIPLE
Heated Oxygen Sensor (HO2S) consists of zirconium and
alumina and is installed on upstream and downstream of
the Manifold Catalyst Converter (MCC). After it compares
oxygen consistency of the atmosphere with the exhaust
gas, it transfers the oxygen consistency of the exhaust gas
to the PCM. When A/F ratio is rich or lean, it generates ap-
proximately 1V or 0V respectively. In order that this sen-
sor normally operates, the temperature of the sensor tip
is higher than 370℃ (698℉). So it has a heater which is
controlled by the PCM duty signal. When the exhaust gas
temperature is lower than the specified value, the heater
warms the sensor tip.
Terminal
Sensing Element
EGRF247A
Cable
Terminal Interface
Element Tip
Shield
EGRF248A
SPECIFICATION
A/F Ratio
Output Voltage (V)
RICH
0.80 ~ 0.92
LEAN
0.1
Item
Specification
Heater Resistance (Ω )
3.0 ~ 4.0Ω at 21℃
(69.8℉)
GASOLINE ENGINE CONTROL SYSTEM
FLA -43
WAVEFORM
HO2S (
1)
HO2S (
1)
HO2S (
2)
HO2S (
2)
HO2S (
1)
HO2S (
2)
LGLG002E
FLA -44
FUEL SYSTEM
CIRCUIT DIAGRAM
HO2S [Bank 1/Sensor 1]
HO2S [Bank 2/Sensor 1]
PCM
C91-1,2
C30-B
PCM (C30-B)
HO2S [B1/S1] (C91-1)
1
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
Battery Voltage (B+)
Main Relay
3
4
PCM C30-B (30)
HO2S [B1/S1] Signal
Sensor ground
PCM C30-B (49)
Main Relay
3
4
1
2
49 - HO2S [B1/S1] Signal
30 - GND
70 - Heater [B1/S1] Control
HO2S [B2/S1] (C91-2)
Main Relay
3
4
1
2
51 - HO2S [B2/S1] Signal
28 - GND
67 - Heater [B2/S1] Control
HO2S [B1/S2] (C91-3)
Main Relay
3
4
1
2
50 - HO2S [B1/S2] Signal
31 - GND
74 - Heater [B1/S2] Control
HO2S [B2/S2] (C91-4)
Main Relay
3
4
1
2
52 - HO2S [B2/S2] Signal
29 - GND
73 - Heater [B2/S2] Control
1
2
3
4
PCM C30-B (28)
HO2S [B2/S1] Signal
Sensor ground
PCM C30-B (51)
Battery Voltage (B+)
Main Relay
PCM C30-B (67)
Heater
[B2/S1] Control
1
2
3
4
PCM C30-B (31)
HO2S [B1/S2] Signal
Sensor ground
PCM C30-B (50)
Battery Voltage (B+)
Main Relay
PCM C30-B (74)
Heater
[B1/S2] Control
1
2
3
4
PCM C30-B (29)
HO2S [B2/S2] Signal
Sensor ground
PCM C30-B (52)
Battery Voltage (B+)
Main Relay
PCM C30-B (73)
Heater
[B2/S2] Control
[CIRCUIT DIAGRAM]
[HARNESS CONNECTORS]
[CONNECTION INFORMATION]
Terminal
Connected to
Function
Terminal
Connected to
Function
Terminal
Connected to
Function
Terminal
Connected to
Function
HO2S [B1/S1]
HO2S [B2/S1]
HO2S [B1/S2]
HO2S [B2/S2]
PCM C30-B (70)
Heater
[B1/S1] Control
HO2S [Bank 1/Sensor 2]
HO2S [Bank 2/Sensor 2]
C91-3,4
2
1
4
3
1
2
3
4
SCMF16110L
COMPONENT INSPECTION
1.
Check signal waveform of HO2S using a scantool.
Specification: Refer to "waveform".
2.
Disconnet the HO2S connector.
3.
Measure resistance between HO2S heater terminals
3 and 4.
GASOLINE ENGINE CONTROL SYSTEM
FLA -45
2
1
4
3
1
2
3
4
SCMF16111L
4.
Check that the resistance is within the specification.
Specification: Refer to SPECIFICATION.
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