2006 SUZUKI SX4 terminal

Downloaded from www.Manualslib.com manuals search engine Air Conditioning System: Automatic Type 7B-59
DTC B1503: Evaporator Temperature Sensor Circuit MalfunctionS6RW0D7224011
Wiring Diagram
DTC Detecting Condition and Trouble Area
DTC Troubleshooting
NOTE
When DTC B1502, B1504, B1511 and B1512 are indicated together, it is possible that sensor ground
circuit is open.

5V
G20
1 2 3 4 5 6 7 8 9 10 11 12 13 14
15 16 17 18 19 20 21 24 23 22 25 26 27 28 29 30
ORNORNWHT/BLKG20-9G20-24
[S]
[G] 2
31
I7RW01722005-01
[S]: Evaporator temperature sensor signal circuit 1. HVAC control module 3. To other sensors
[G]: Evaporator temperature sensor ground circuit 2. Evaporator temperature sensor
DTC Detecting Condition Trouble Area
Evaporator temperature sensor signal voltage is higher than or lower than
specified value for specified time continuously.• Evaporator temperature sensor
circuit
• Evaporator temperature sensor
• HVAC control module
Step Action Yes No
1Was “Air Conditioning System Check” performed?Go to Step 2. Go to “Air Conditioning
System Check”.
2Wire harness check
1) Turn ignition switch to OFF position.
2) Disconnect connectors from evaporator temperature
sensor and HVAC control module.
3) Check for proper connection to each signal circuit
terminal and ground circuit terminal of evaporator
temperature sensor and HVAC control module
connectors.
4) If OK, check that evaporator temperature sensor circuit
is as follows.
• Wiring harness resistance of each evaporator
temperature sensor signal circuit and ground circuit is
less than 3 Ω
• Insulation resistance between evaporator temperature
sensor signal circuit and vehicle body ground is
Infinity
• Circuit voltage of each evaporator temperature sensor
signal circuit and ground circuit is 0 - 1 V with ignition
switch turned ON
Are they good condition?Go to Step 3. Evaporator temperature
sensor signal circuit
and/or ground circuit are
open, short or high
resistance.

Downloaded from www.Manualslib.com manuals search engine 7B-60 Air Conditioning System: Automatic Type
DTC B1504: Sunload Sensor Circuit MalfunctionS6RW0D7224012
Wiring Diagram
DTC Detecting Condition and Trouble Area
NOTE
When DTC B1502, B1503, B1511 and B1512 are indicated together, it is possible that sensor ground
circuit is open.

3Evaporator temperature sensor reference voltage check
1) Connect connector to HVAC control module with ignition
switch turned OFF.
2) Turn ignition switch to ON position.
3) Measure voltage between signal terminal and ground
terminal of evaporator temperature sensor connector.
Is voltage 4.5 – 5.5 V?Go to Step 4. Substitute a known-
good HVAC control
module and recheck.
4Evaporator temperature sensor check
1) Check evaporator temperature sensor for performance
referring to “Evaporator Temperature Sensor
Inspection”.
Is it in good condition?Substitute a known-
good HVAC control
module and recheck.Replace evaporator
temperature sensor. Step Action Yes No
G20
1 2 3 4 5 6 7 8 9 10 11 12 13 14
15 16 17 18 19 20 21 24 23 22 25 26 27 28 29 30
PNK
ORNORN
G20-25
G20-24
2
[S]
[G]15V
3
I7RW01722006-01
[S]: Sunload sensor signal circuit 1. HVAC control module 3. To other sensors
[G]: Sunload sensor ground circuit 2. Sunload sensor
DTC Detecting Condition Trouble Area
• Sunload sensor signal voltage is higher than or lower than specified value
for specified time continuously.
• Without sunlight• Sunload sensor circuit
• Sunload sensor
• HVAC control module

Downloaded from www.Manualslib.com manuals search engine Air Conditioning System: Automatic Type 7B-61
DTC Troubleshooting
DTC B1511: Temperature Control Actuator (Position Sensor) and/or Its Circuit MalfunctionS6RW0D7224013
Wiring DiagramStep Action Yes No
1Was “Air Conditioning System Check” performed?Go to Step 2. Go to “Air Conditioning
System Check”.
2Wire harness check
1) Turn ignition switch to OFF position.
2) Disconnect connectors from sunload sensor and HVAC
control module.
3) Check for proper connection to each signal circuit
terminal and ground circuit terminal of sunload sensor
and HVAC control module connectors.
4) If OK, check that sunload sensor circuit is as follows.
• Wiring harness resistance of each sunload sensor
signal circuit and ground circuit is less than 3 Ω
• Insulation resistance of each sunload sensor signal
circuit and ground circuit between sunload sensor
connector and vehicle body ground is Infinity
• Circuit voltage of each sunload sensor signal circuit
and ground circuit is 0 – 1 V with ignition switch turned
ON
Are they in good condition?Go to Step 3. Sunload sensor power
supply circuit and/or
signal circuit are open,
short or high resistance.
3Sunload sensor power supply voltage check
1) Connect connector to HVAC control module with ignition
switch turned OFF.
2) Turn ignition switch to ON position.
3) Measure voltage between signal terminal and ground
terminal of sunload sensor connector.
Is voltage 4.5 – 5.5 V?Go to Step 4. Substitute a known-
good HVAC control
module and recheck.
4Sunload sensor check
1) Check sunload sensor for performance referring to
“Sunload Sensor Inspection”.
Is it in good condition?Substitute a known-
good HVAC control
module and recheck.Replace sunload
sensor.
G20
1 2 3 4 5 6 7 8 9 10 11 12 13 14
15 16 17 18 19 20 21 24 23 22 25 26 27 28 29 30
GRY/BLUGRY/RED
5V5V
12V
ORN
WHT
YEL
G20-12
G20-27
G20-24
G20-1G20-2
2
[P]
[S]3
4
[G]
1
I6RW0C722004-01
[P]: Position sensor power supply circuit [G]: Position sensor ground circuit 2. Temperature control actuator 4. To other sensors
[S]: Position sensor signal circuit 1. HVAC control module 3. To air flow control actuator

Downloaded from www.Manualslib.com manuals search engine 7B-62 Air Conditioning System: Automatic Type
DTC Detecting Condition and Trouble Area
DTC Troubleshooting
NOTE
• When DTC B1502, B1503, B1504 and B1512 are indicated together, it is possible that sensor ground
circuit is open.
• When DTC B1512 is indicated together, it is possible that position sensor power supply circuit is
open.

DTC Detecting Condition Trouble Area
Temperature control actuator position sensor signal voltage is higher than or
lower than specified value for specified time continuously.• Temperature control actuator circuit
• Temperature control actuator
• HVAC control module
Step Action Yes No
1Was “Air Conditioning System Check” performed?Go to Step 2. Go to “Air Conditioning
System Check”.
2Wire harness check
1) Turn ignition switch to OFF position.
2) Disconnect connectors from temperature control
actuator and HVAC control module.
3) Check for proper connection to position sensor power
supply, signal and ground circuit terminals of
temperature control actuator and HVAC control module
connectors.
4) If OK, check that position sensor of temperature control
actuator circuit is as follows.
• Wiring harness resistance of each position sensor
power supply, signal and ground circuit is less than 3
Ω
• Insulation resistance of each position sensor power
supply, signal and ground circuit is infinity between
temperature control actuator connector and vehicle
body ground
• Circuit voltage of each position sensor power supply,
signal and ground circuit is 0 - 1 V with ignition switch
turned ON
Are they in good condition?Go to Step 3. Position sensor power
supply, signal circuit
and/or ground circuit are
open, short or high
resistance.
3Position sensor of temperature control actuator power
supply voltage check
1) Connect connector to HVAC control module.
2) Turn ignition switch to ON position.
3) Measure voltage between.
• Position sensor power supply terminal and position
sensor ground terminal of temperature control
actuator connector
• Position sensor signal terminal and position sensor
ground terminal of temperature control actuator
connector
Is voltage 4.5 – 5.5 V?Go to Step 4. Go to Step 5.

Downloaded from www.Manualslib.com manuals search engine Air Conditioning System: Automatic Type 7B-63
DTC B1512: Air flow Control Actuator (Position Sensor) and/or Its Circuit MalfunctionS6RW0D7224014
Wiring Diagram
DTC Detecting Condition and Trouble Area4Temperature control actuator check
1) Check position sensor of temperature control actuator
for performance referring to “Temperature Control
Actuator and Its Circuit Inspection”.
Is it in good condition?Substitute a known-
good HVAC control
module and recheck.Replace temperature
control actuator.
5Position sensor of temperature control actuator power
supply voltage check
1) Turn ignition switch to OFF position.
2) Disconnect connector from air flow control actuator.
3) Turn ignition switch to ON position.
4) Measure voltage between.
• Position sensor power supply terminal and position
sensor ground terminal of temperature control
actuator connector
• Position sensor signal terminal and position sensor
ground terminal of temperature control actuator
connector
Is voltage 4.5 – 5.5 V?Check air flow control
actuator and its circuit.Substitute a known-
good HVAC control
module and recheck. Step Action Yes No
G20
1 2 3 4 5 6 7 8 9 10 11 12 13 14
15 16 17 18 19 20 21 24 23 22 25 26 27 28 29 30
BRN/YELBRN/WHT
5V5V
12V
ORN
WHTG20-12
G20-28
G20-24
G20-15G20-16
WHT/BLU 2
3
4
[P]
[G][S]1
I6RW0C722005-01
[P]: Position sensor power supply circuit [G]: Position sensor ground circuit 2. Air flow control actuator 4. To other sensors
[S]: Position sensor signal circuit 1. HVAC control module 3. To temperature control actuator
DTC Detecting Condition Trouble Area
Air flow control actuator position sensor signal voltage is higher than or lower
than specified value for specified time continuously.• Air flow control actuator circuit
• Air flow control actuator
• HVAC control module

Downloaded from www.Manualslib.com manuals search engine 7B-64 Air Conditioning System: Automatic Type
DTC Troubleshooting
NOTE
• When DTC B1502, B1503, B1504 and B1511 are indicated together, it is possible that sensor ground
circuit is open.
• When DTC B1511 is indicated together, it is possible that position sensor power supply circuit is
open.

Step Action Yes No
1Was “Air Conditioning System Check” performed?Go to Step 2. Go to “Air Conditioning
System Check”.
2Wire harness check
1) Turn ignition switch to OFF position.
2) Disconnect connectors from air flow control actuator and
HVAC control module.
3) Check for proper connection to position sensor power
supply, signal and ground circuit terminals of air flow
control actuator and HVAC control module connectors.
4) If OK, check that position sensor of air flow control
actuator circuit is as follows.
• Wiring harness resistance of each position sensor
power supply, signal and ground circuit is less than 3
Ω
• Insulation resistance of each position sensor power
supply, signal and ground circuit is infinity between air
flow control actuator connector and vehicle body
ground
• Circuit voltage of each position sensor power supply,
signal and ground circuit is 0 - 1 V with ignition switch
turned ON
Are they in good condition?Go to Step 3. Position sensor power
supply, signal circuit
and/or ground circuit are
open, short or high
resistance.
3Position sensor of air flow control actuator power
supply voltage check
1) Connect connector to HVAC control module with ignition
switch turned OFF.
2) Turn ignition switch to ON position.
3) Measure voltage between.
• Position sensor power supply terminal and position
sensor ground terminal of air flow control actuator
connector
• Position sensor signal terminal and position sensor
ground terminal of air flow control actuator connector
Is voltage 4.5 – 5.5 V?Go to Step 4. Go to Step 5.
4Air flow control actuator check
1) Check position sensor of air flow control actuator for
performance referring to “Air Flow Control Actuator and
Its Circuit Inspection”.
Is it in good condition?Substitute a known-
good HVAC control
module and recheck.Replace air flow control
actuator.

Downloaded from www.Manualslib.com manuals search engine Air Conditioning System: Automatic Type 7B-65
DTC B1513: Temperature Control Actuator (Motor) and/or Its Circuit MalfunctionS6RW0D7224015
Wiring Diagram
DTC Detecting Condition and Trouble Area5Position sensor of temperature control actuator power
supply voltage check
1) Turn ignition switch to OFF position.
2) Disconnect connector from temperature control actuator.
3) Turn ignition switch to ON position.
4) Measure voltage between.
• Position sensor power supply terminal and position
sensor ground terminal of air flow control actuator
connector
• Position sensor signal terminal and position sensor
ground terminal of air flow control actuator connector
Is voltage 4.5 – 5.5 V?Check temperature
control actuator and its
circuit.Substitute a known-
good HVAC control
module and recheck. Step Action Yes No
G20
1 2 3 4 5 6 7 8 9 10 11 12 13 14
15 16 17 18 19 20 21 24 23 22 25 26 27 28 29 30
GRY/BLUGRY/RED
5V5V
12V
ORN
WHT
YEL
G20-12
G20-27
G20-24
G20-1G20-2
2
[D]
3
41
I6RW0C722006-02
[D]: Temperature control actuator motor drive circuit 2. Temperature control actuator 4. To other sensors
1. HVAC control module 3. To air flow control actuator
DTC Detecting Condition Trouble Area
Motor of temperature control actuator does not move longer than specified
time.• Temperature control actuator circuit
• Temperature control linkage
• Temperature control actuator
• HVAC unit
• HVAC control module

Downloaded from www.Manualslib.com manuals search engine 7B-66 Air Conditioning System: Automatic Type
DTC Troubleshooting
Step Action Yes No
1Was “Air Conditioning System Check” performed?Go to Step 2. Go to “Air Conditioning
System Check”.
2DTC check
1) Connect scan tool to DLC with ignition switch turned
OFF.
2) Turn ignition switch to ON position and check DTC.
Is DTC B1511 detected together?Go to “DTC B1511:
Temperature Control
Actuator (Position
Sensor) and/or Its
Circuit Malfunction”.Go to Step 3.
3Visual Check
Check if there is any obstruction in operating range of
actuator linkage and if actuator linkage operates smoothly.
Is it in good condition?Go to Step 4. Obstruction in operating
range of actuator
linkage, actuator linkage
faulty and/or internal
fault of HVAC unit.
4Wire harness check
1) Turn ignition switch to OFF position.
2) Disconnect connectors from temperature control
actuator and HVAC control module.
3) Check for proper connection to actuator motor drive
circuit terminals of temperature control actuator and
HVAC control module connectors.
4) If OK, check that actuator motor drive circuit of
temperature control actuator is as follows.
• Wiring harness resistance of each actuator motor
drive circuit is less than 3 Ω
• Insulation resistance of each actuator motor drive
circuit is infinity between temperature control actuator
connector and vehicle body ground
• Circuit voltage of each actuator motor drive circuit is 0
– 1 V with ignition switch turned ON
Are they in good condition?Go to Step 5. Actuator motor drive
circuit(s) is open, short
or high resistance.
5Wire harness check
Check position sensor circuit of temperature control actuator
for condition referring to Step 2 of “DTC B1511: Temperature
Control Actuator (Position Sensor) and/or Its Circuit
Malfunction”.
Is it in good condition?Go to Step 6. Repair or replace.
6Temperature control actuator check
1) Check temperature control actuator for performance
referring to “Temperature Control Actuator and Its Circuit
Inspection”.
Is it in good condition?Substitute a known-
good HVAC control
module and recheck.Replace temperature
control actuator.