Hyundai Santa Fe (2006 year). Manual - part 547

FLA -254

FUEL SYSTEM

SPECIFICATION

EFA42C60

(REFERENCE ONLY)

Test Condition

HO2S Voltage(Sensor1)

HO2S Voltage(Sensor2)

HO2S Signal

at idle after warm-up

Signal is commonly switching

from rich to lean more than 3

times in 10 sec.

Signal is commonly above 0.6V.

HO2S signal at open circuit

(Pumping current OFF)

Approx. 0.45V

HO2S signal at open circuit

(Pumping current ON)

Approx. 3.5V

DTC TROUBLESHOOTING PROCEDURES

FLA -255

SCHEMATIC DIAGRAM

EDFB2BD8

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

FLA -256

FUEL SYSTEM

SIGNAL WAVEFORM AND DATA

E00C0EDC

Fig) Signal waveforms of front HO2S(the upper) and rear HO2S(the lower)

SCMF16223L

After warming-up, if accelerator pedal is released suddenly around 4000rpm, the HO2S signal reading will be lower than
200mV resulting from Fuel cut-off for the moment. Conversely, if suddenly accelerator pedal is depressed, HO2S signal
reading will be around 0.6V ~1.0V. At idle, Normally HO2S signal will switch from lean to rich with 3 Hz. And as racing,
Its frequency rises.

MONITOR DTC STATUS

E0480FCB

1.

Check DTC Status

1)

Connect scantool to Data Link Connector(DLC).

2)

IG "ON".

3)

Select "Diagnostic Trouble Codes(DTCs)" mode, and then Press F4(DTAL) to check DTC’s information from the
DTCs menu

4)

Read "DTC Status" parameter.

SCMF16159L

5)

Is parameter displayed "Present fault"?

DTC TROUBLESHOOTING PROCEDURES

FLA -257

YES

▶ Go to "Terminal and connector inspection" procedure.

NO

▶ Fault is intermittent caused by poor contact in the sensor’s and/or PCM’s connector or was repaired and PCM
memory was not cleared. Thoroughly check connectors for looseness, poor connection, ending, corrosion, con-
tamination, deterioration, or damage. Repair or replace as necessary and go to "Verification of Vehicle Repair"
procedure.

TERMINAL AND CONNECTOR INSPECTION

E4CC3E07

1.

Many malfunctions in the electrical system are caused by poor harness and terminals. Faults can also be caused by
interference from other electrical systems, and mechanical or chemical damage.

2.

Thoroughly check connectors for looseness, poor connection, bending, corrosion, contamination, deterioration, or
damage.

3.

Has a problem been found?

YES

▶ Repair as necessary and go to "Verification of Vehicle Repair" procedure

NO

▶ Go to " Signal Circuit Inspection " procedure.

SIGNAL CIRCUIT INSPECTION

E46755BD

1.

IG "OFF" and disconnect HO2S(B1/S2)

2.

IG "ON"

3.

Measure voltage between terminal 1 of HO2S(B1/S2) harness connector and chassis ground.

Specification : Approx. 3.5V - when pumping current is ON
Approx. 0.45V - when pumping current is OFF

4.

Is the measured voltage within specification?

YES

▶ Go to "Component Inspection" procedure.

NO

▶ Repair short to ground in harness, and go to "Verification of Vehicle Repair" procedure.

COMPONENT INSPECTION

E9A07236

1.

Check the Signal waveform of HO2S

1)

IG "OFF" and connect HO2S connector.

2)

Engine start.