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Suzuki SX4 Service Manual page 1045

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DTC No.
(displayed
Detection item
on SUZUKI
scan tool)
Temperature
Control Actuator
B1513
(Motor) and/or Its
Circuit
Malfunction
Air Flow Control
Actuator (Motor)
B1514
and/or Its Circuit
Malfunction
Temperature
B1520
Selector
Malfunction
Blower Speed
B1521
Selector
Malfunction
Air Flow Selector
B1522
Malfunction
Back-up Power
B1541
Supply Circuit
Malfunction
A/C Refrigerant
B1546
Pressure
Malfunction
Serial
Communication
B1551
Circuit
Malfunction
HVAC Control
B1552
Module Check
Sum Error
CAN
Communication
B1553
Circuit
Malfunction
VSS Signal
B1557
Failure
ECT signal
B1561
Failure
Outside
Temperature
B1562
Sensor Signal
Failure
A/C Refrigerant
B1563
Pressure Sensor
Signal Failure
DTC (indicated on
HVAC control
module)
Indicated
Indicated
determined when following condition detected)
by "REC"
by "FRE"
indicator
indicator
light
light
Motor of temperature control actuator is not
6
3
operated more than specified time.
Motor of air flow control actuator is not operated
7
3
more than specified time.
Signal voltage of temperature selector in HVAC
15
1
control module is higher than specification.
Signal voltage of temperature selector in HVAC
15
2
control module is lower than specification.
Signal voltage of blower speed selector in HVAC
16
1
control module is higher than specification.
Signal voltage of blower speed selector in HVAC
16
2
control module is lower than specification.
Signal voltage of airflow selector in HVAC control
17
1
module is higher than specification.
Signal voltage of airflow selector in HVAC control
17
2
module is lower than specification.
• Back-up power supply voltage of HVAC control
14
1
• When connect battery with vehicle and then,
• Signal voltage of outside air temperature sensor
13
5
• Insufficient refrigerant in A/C system.
Circuit voltage of serial communication circuit is
9
1
higher than specification.
Circuit voltage of serial communication circuit is
9
2
lower than specification.
HVAC control module received unspecified data
9
4
from BCM more than 8 times.
HVAC control module received signal indicating
10
4
reception error from ECM.
HVAC control module receives invalid data of VSS
11
4
signal from BCM.
HVAC control module receives invalid data of ECT
5
4
signal from BCM.
HVAC control module receives invalid data of
1
4
outside air temperature sensor signal from BCM.
HVAC control module receives invalid data of A/C
13
4
refrigerant pressure sensor signal from BCM.
Air Conditioning System: Automatic Type 7B-51
Condition when trouble detected (DTC is
module is higher than or lower than
specification.
turn ignition switch to ON position for first time.
is more than specified value. However, A/C
refrigerant pressure is less than specified value.
"A/C"
indicator
light
Flashed
Flashed
Flashed
Flashed
Flashed
Flashed
Flashed
Flashed
Flashed
Flashed
Flashed
Flashed
Flashed
Flashed

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