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".
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