Suzuki Liana RH413, Service Manual

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Air Conditioning System: Automatic Type 7B-50
Fail-Safe Table
S3RH0A7224006
When any of the following malfunctions (DTCs) is detected, fail-safe mode is activated.
However, when HVAC control module detects normal operation of A/C system, fail-safe mode is canceled.
NOTE
In case that all of temperature selector, blower speed selector, and air flow selector are abnormal, the
operation of air conditioning system stops.
Scan Tool Data
S3RH0A7224007
As the data values given in the following are standard values estimated on the basis of values obtained from the
normally operation vehicles by using a scan tool, use them as reference values. Even when the vehicles are in good
condition, there may be cases where the checked values do not fall within each specifies data range. Therefore,
judgement as abnormal should not be made by checking with these data alone.
DTC
No.
Trouble Area
Fail-Safe Operation
Detection of malfunction when
ignition switch is turned ON
Detection of malfunction during
ignition switch is ON
)
B1501
Outside air temperature sensor
and/or its circuit
20
°
C (68
°
F)
HVAC control module keeps
condition just before detection.
)
B1502
Inside air temperature sensor and/
or its circuit
25
°
C (77
°
F)
)
B1503
A/C evaporator temperature
sensor
0
°
C (32
°
F)
)
B1504
Sunload sensor and/or its circuit 175 W/m 2
)
B1510
Water temperature sensor and/or
its circuit
80
°
C (176
°
F)
)
B1511
Temperature control actuator
(position sensor) and/or its circuit
The operation of actuator stops.
)
B1512
Air flow control actuator (position
sensor) and/or its circuit
)
B1513
Temperature control actuator and/
or its circuit
)
B1514
Air flow control actuator and/or its
circuit
)
B1520
Temperature selector and/or its
circuit
23
°
C (73
°
F)
)
B1521
Blower speed selector and/or its
circuit
1st
)
B1522
Air flow selector and/or its circuit DEF
Scan Tool Data Condition Normal Condition / Reference Value
)
TEMP CONT SWITCH
Each reference value is relative to the position of
temperature selector of HVAC control module.
Max Cool, 18
°
C (64
°
F), 18.5
°
C (65
°
F) – 27.5
°
C (81.5
°
F), 28
°
C (82
°
F),
Max Hot
)
CABIN TEMPERATURE
Reference value is relative to in-car temperature.
–6.5
°
C – 57.25
°
C
(20.3
°
F – 135.05
°
F)
)
OUTSIDE AIR TEMP
Reference value is relative to outside air
temperature. –23.3
°
C – 65.95
°
C
(–9.94
°
F – 150.71
°
F)
)
EVAPORATOR TEMP
Reference value is relative to temperature of
evaporator. –29.7
°
C – 59.55
°
C
(–21.46
°
F – 139.19
°
F)
)
COOLANT TEMP
At specified idle speed after warming up.
1.3
°
C – 90.55
°
C
(34.34
°
F – 194.99
°
F)
)
SUNLOAD
Reference value depends on the situation. 0 W/m 2 – 4447.8 W/m 2
)
MODE CONT SWITCH
Each reference value is relative to the position of
air flow selector of HVAC control module. AUTO, VENT, BI-LEVEL, FOOT, DEF-
FOOT, DEF
)
FAN CONT SWITCH
Each reference value is relative to the position of
blower speed selector of HVAC control module.
AUTO, OFF, 1st, 2nd – 7th, 8th