Hyundai Santa Fe (2006 year). Manual - part 427

FL -318

FUEL SYSTEM

DTC P0562 SYSTEM VOLTAGE LOW

COMPONENT LOCATION

EE4FD5BD

Main Relay

Fuel Pump 
Relay

SCMFL6507L

GENERAL DESCRIPTION

E927203F

Normally, battery voltage fluctuates from 11.5V to 14.5V. Especially at cranking, voltage can drop to 9.8V. Therefore,
actuators which require 12V power supply meet fluctuation of power by 5V.A little change of voltage supply can shift
controlling characteristic of actuators, such as injectors, RPCV and EGR actuator, which should be controlled delicately.
To correct controlling characteristic change arrised from voltage fluctuation, ECM performs actuator operating correction
according to voltage change as detecting battery voltage change.

DTC DESCRIPTION

ED7E01EF

P0562 is set when battery voltage below 5.8V is detected for more than 5 sec. Check charging system.(charging circuit,
alternator component)

▶

ECM senses battery voltage as monitoring the voltages in ECM(C230-K) connector terminal 1,3,5 which are transmitted

from main relay.

DTC DETECTING CONDITION

EF9B8A2E

Item

Detecting Condition

Possible Cause

DTC Strategy

• Voltage monitoring

Enable Conditions

• IG KEY "ON"

Threshold Value

• when battery voltage is below 5.8V

Diagnostic Time

• 5 sec.

Fuel cut

NO

EGR Off

NO

Fuel Limit

NO

Fail Safe

Check

Lamp

NO

• Battery voltage is considered

as 12V.

• Charging circuit
• Alternator component

DTC TROUBLESHOOTING PROCEDURES

FL -319

SCHEMATIC DIAGRAM

E0138C7C

M15-B

Cluster

M15-C

Cluster

C230-K

C230-A

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

1

2

 ECM

1

2

3

4

5

6

7

9

8

10

11

12

1

2

3

4

5

6

7

8

9

10

11

12

13

14

15

16

1

5

4

2

3

73

51

29

7

1

2

3

4

5

6

74

52

30

8

75

77

53

35

36

37

34 33 32 31

9

76

54

10

55

11

78

56

12

79

57

13

80

58

14

81

59

15

82

60

38

16

83

61

39

17

84

62

40

18

85

63

41

19

86

64

42

20

87

65

43

21

88

66

22

89

67

45 44

23

90

68

46

24

91

69

47

25

92

70

48

26

93

71

49

27

94

72

50

28

 ON/START power( I/P JUNCTION BOX 10A CLUSTER FUSE)

Cluster(Charging lamp)

PRE-EXCITATION RESISTOR

Hot a t all times

 ( E/R FUSE & RELAY BOX 40A ECU MAIN FUSIBLE LINK )

15A SENSOR #3

20A IG COIL

Throttle flap actuator

Brake switch

Blower relay

EEGR control valve

VGT actuator
CMPS
Glow plug relay

PTC heater relay

Aircon relay

Stop lamp switch

Fuel pump relay

 28 IG KEY ON signal

 ON/START signal (E/R FUSE & RELAY BOX 10A ECU FUSE)

C230-K terminal 72

C230-K  terminal 1,2,3

SENSOR FUSE (#2,#3)

Main relay

C230-K ECM

1

2

3

4

5

15A SENSOR #2

10A SENSOR #1

5

2

4

1

3

40A ECU FUSIBLE LINK

40A ECU FUSIBLE LINK

3 Battery voltage

5 Battery voltage

72 Main relay control

1 Battery voltage

Main relay control

Main relay coil power

Hot at all times

Power supply to ECM, Sensor, Actuator

Power supply to ECM, Sensor, Actuator

Terminal

Connected to

Function

 Hot at all times( E/R FUSE & RELAY BOX 150A ALT DSL FUSE )

E204 Alternator

Lamp 2

Sensing 1

M15-C

M15-B

7

 15

 1

 3

[CIRCUIT DIAGRAM]

[HARNESS CONNECTOR]

[CONNECTOR INFORMATION]

Alternator

E204 

SCMFL6403L

FL -320

FUEL SYSTEM

SIGNAL WAVEFORM AND DATA

EA8B40D5

Fig.1

Fig.1) This is alternator charging waveform during engine running. Check if battery voltage drops dramatically as turning on
           the electrical device such as head lamp, defogger and A/C.

LFIG321A

MONITOR SCANTOOL DATA

EB16879A

1.

Connect Scantool to Data Link Connector (DLC).

2.

Warm engine up to normal operating temperature.

3.

Turn "OFF" electrical devices and A/C.

4.

Monitor "BATTERY VOLTAGE" parameter on the Scantool.

specification :12.5V~14.5V at idle without any load(800RPM)

Fig.1

Fig 1) "BATTERY VOLTAGE" data at idle after warming engine up.
           Check if the symptoms listed below occur as checking if battery voltage drops dramatically when turning 
            on the electrical devices. 

SCMFL6302L

※

The vehicles with the alternator of poor charging efficiency

1. Lamps are dim at idle, while lamps are bright at acceleration.
2. Intermitently RPM drops excessively or engine shut down at low RPM close to idle state at times.

DTC TROUBLESHOOTING PROCEDURES

FL -321

3. Smooth cranking happens rarely. (Warning lamps in cluster turn dimmer excessively at cranking and poor crank-
inghappen.)
4. Charging lamp turns on during driving.

TERMINAL AND CONNECTOR INSPECTION

EB6748B5

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 for
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

E24A7776

1.

Check power supply in alternator connector

1)

IG KEY "ON", Turn engine "OFF".

2)

Disconnect alternator connector.

3)

Measure the voltage of terminal 2 of alternator connector.

Specification : 10.5V~12.0V

4)

Is the measured voltage within the specification?

YES

▶

Go to "2. Check charging lamp operation".

NO

▶

When no voltage is detected at terminal 2.

▶

Check charging lamp on cluster and charging lamp resistor and repair the open E/R FUSE & RELAY

BOX 10A Alternator FUSE related circuit and go to "Verification of Vehicle Repair".

2.

Check charging lamp operation

1)

IG KEY "ON", ENGINE "OFF".