Visual Inspection; Dtc B1502: Inside Air Temperature Sensor Circuit Malfunction - Suzuki 2006 SX4 Service Manual

SUN LOAD (W/m ): This parameter indicates the
2
amount of sunlight detected by sunload sensor.
MODE CONT SWITCH (Air flow selector position,
AUTO, FACE, B/L, FOOT, D/F, DEF): This
parameter indicates the selected position of air flow
selector.
FAN CONT SWITCH (Blower speed selector, AUTO,
OFF, 1st – 8th): This parameter indicates the
selected position of blower speed selector.
FAN DESIRE VOLT (Fan desired voltage, V): This
parameter indicates the consumption voltage of
blower motor.
AIR MIX POS SENSOR (Temperature control
actuator position sensor, V): This parameter
indicates the input signal from position sensor in
temperature control actuator.
MODE POS SENSOR (Air flow control actuator
position sensor, V): This parameter indicates the
input signal from position sensor in air flow control
actuator.
A/C CONT SIG (A/C control signal, ON, OFF): This
parameter indicates the state of A/C switch.

Visual Inspection

Check visually the following parts and systems.
• Refrigerant
• A/C pipe or hose
• A/C compressor drive belt
• Battery
• Connectors of electric wire harness
• Fuses
• Parts
• Other parts that can be checked visually

DTC B1502: Inside Air Temperature Sensor Circuit Malfunction

Wiring Diagram
2
[S]
PNK/BLK
ORN
3
[S]: Inside air temperature sensor signal circuit
[G]: Inside air temperature sensor ground circuit
Inspection item
leakage and amount
disconnection,
looseness and
deterioration
looseness and damage Refer to "Compressor Drive Belt Inspection
fluid level and corrosion
of terminal
disconnection and
friction
burning
installation and damage
1
5V
14
G20-10
30
ORN G20-24
[G]
1. HVAC control module
2. Inside air temperature sensor
Air Conditioning System: Automatic Type 7B-57
BLOWER LOAD SIG (Blower fan load signal, ON,
OFF): ON: Position of blower speed selector is 1st
position or more.
OFF: Position of blower speed selector is OFF
position.
AIR INTAKE MODE (Air intake selector position,
AUTO, FRE, REC): This parameter indicates the
selected position of air intake selector.
REFRIGERANT PRESSURE (A/C refrigerant absolute
pressure, kPa): This parameter indicates the A/C
refrigerant absolute pressure calculated by ECM
A/C COMP CLUCH (A/C compressor magnet clutch,
ON, OFF): This parameter indicates the state of the
A/C compressor magnet clutch.
VEHICLE SPEED (km/h, mph): This parameter
indicates the vehicle speed calculated by ECM.
ENGINE TYPE (Engine type signal, J20, M16 or
M15): This parameter indicates the engine type
signal transmitted by ECM.
METER SPEC (Combination meter spec signal, EU,
UK, US, Canada, DOM): This parameter indicates
the combination meter spec signal transmitted by
combination meter.
and Adjustment".
G20
13 12 11 10 9 8
29 28 27 26 25 24 23
Correction
7 6 5 4 3 2
22 21 20 19 18 17 16
3. To other sensors
S6RW0D7224009
S6RW0D7224010
1
15
I7RW01722004-01