Ac control SUZUKI SWIFT 2005 2.G Service Workshop Manual

Downloaded from www.Manualslib.com manuals search engine 7B-52 Air Conditioning System: Automatic Type
DTC B1504: Sunload Sensor and/or Its Circuit MalfunctionS7RS0B7224012
Wiring Diagram
DTC Detecting Condition and Trouble Area
DTC Troubleshooting7
Evaporator temperature sensor check
1) Check evaporator temperature sensor referring to
“Evaporator Thermistor (Evaporator Temperature
Sensor) Inspection”.
Is it in good condition? HVAC control module
faulty.
Evaporator temperature
sensor faulty.
Step Action Yes No
5V
PNK G52-2
G52-5
YEL/BLK
2
1
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1. HVAC control module
2. Sunload sensor
DTC Detecting Condition Trouble Area
Sunload sensor signal voltage is higher than or lower than specified value for
specified time continuously. • Sunload sensor circuit
• Sunload sensor
• HVAC control module
Step
Action YesNo
1 Sunload sensor power supply circuit check
1) Disconnect sunload sensor connector.
2) Check for proper connection to sunload sensor at “PNK”
and “YEL/BLK” wire terminals.
3) If OK, measure voltage between “PNK” wire terminal of sunload sensor connector and vehicle body ground with
ignition switch turned ON.
Is voltage 4 – 6 V? Go to Step 5.
Go to Step 2.
2 Sunload sensor power supply circuit check
1) Disconnect connector from HVAC control module with
ignition switch turned OFF.
2) Check for proper connection to HVAC control module connector at “G52-2” and “G52-5” terminals.
3) If OK, measure resistance between “PNK” wire terminal of sunload sensor connector and “G52-2” terminal of
HVAC control module connector.
Is resistance below 5
Ω? Go to Step 3. “PNK” wire open or high
resistance circuit.
3 Sunload sensor power supply circuit check
1) Measure resistance between “PNK” wire terminal of
sunload sensor connector and vehicle body ground.
Is resistance infinity? Go to Step 4. “PNK” wire shorted to
ground circuit.

Downloaded from www.Manualslib.com manuals search engine Air Conditioning System: Automatic Type 7B-53
DTC B1511: Temperature Control Actuator (Position Sensor) and/or Its Circuit MalfunctionS7RS0B7224013
Wiring Diagram
DTC Detecting Condition and Trouble Area4
Sunload sensor power supply circuit check
1) Measure voltage between “PNK” wire terminal of
sunload sensor connector and vehicle body ground with
ignition switch turned ON.
Is voltage 0 V? Go to Step 5. “PNK” wire shorted to
other circuit.
5 Sunload sensor signal circuit check
1) Disconnect HVAC control modul e connector with ignition
switch turned OFF.
2) Measure resistance between “YEL/BLK” wire terminal of sunload sensor connector and vehicle body ground.
Is resistance infinity? Go to Step 6. “YEL/BLK” wire shorted
to ground circuit.
6 Sunload sensor signal circuit check
1) Measure resistance between “G52-5” terminal of HVAC
control module connector and “YEL/BLK” wire terminal
of sunload sensor connector.
Is resistance below 5
Ω? Go to Step 7. “YEL/BLK” wire open or
high resistance circuit.
7 Sunload sensor signal circuit check
1) Measure voltage between “YEL/BLK” wire terminal of
sunload sensor connector and vehicle body ground with
ignition switch turned ON.
Is voltage 0 V? Go to Step 8.
“YEL/BLK” wire shorted
to other circuit.
8 Sunload sensor check
1) Check sunload sensor referring to “Sunload Sensor
Inspection”.
Is it in good condition? HVAC control module
faulty.
Sunload sensor faulty.
Step
Action YesNo
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G51
M 12V
5V 5V
YEL
WHT
GRY/BLU
GRY/RED
2
1
ORN
G51-3
G51-4
G52-1
G52-13
G52-3
3
4
I5RS0A722013-01
1. HVAC control module 2. Temperature control actuator 3. To air flow control actuator4. To other sensors
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

Downloaded from www.Manualslib.com manuals search engine 7B-54 Air Conditioning System: Automatic Type
DTC TroubleshootingStep Action YesNo
1 Position sensor power supply circuit check
1) Disconnect temperature control actuator connector.
2) Check for proper connection to temperature control
actuator at “WHT”, “YEL” and “ORN” wire terminals.
3) If OK, measure voltage between “WHT” wire terminal of temperature control actuator connector and vehicle body
ground with ignition switch turned ON.
Is voltage 4 – 6 V? Go to Step 6.
Go to Step 2.
2 Position sensor power supply circuit check
1) Disconnect air flow control actuator connector with
ignition switch turned OFF.
2) Measure voltage between “WHT” wire terminal of temperature control actuator connector and vehicle body
ground with ignition switch turned ON.
Is voltage 4 – 6 V? Air flow control actuator
faulty.
Go to Step 3.
3 Position sensor power supply circuit check
1) Disconnect connector from HVAC control module with
ignition switch turned OFF.
2) Check for proper connection to HVAC control module connector at “G52-1”, “G52-3” and “G52-13” terminals.
3) If OK, measure resistance between “WHT” wire terminal of temperature control actuator connector and “G52-1”
terminal of HVAC control module connector.
Is resistance below 5
Ω? Go to Step 4. “WHT” wire open or
high resistance circuit.
4 Position sensor power supply circuit check
1) Measure resistance between “WHT” wire terminal of
temperature control actuator connector and vehicle body
ground.
Is resistance infinity? Go to Step 5.
“WHT” wire shorted to
ground circuit.
5 Position sensor power supply circuit check
1) Measure voltage between “WHT” wire terminal of
temperature control actuator connector and vehicle body
ground with ignition switch turned ON.
Is voltage 0 V? Go to Step 6.
“WHT” wire shorted to
other circuit.
6 Position sensor signal circuit check
1) Connect HVAC control module connector with ignition
switch turned OFF.
2) Measure voltage between “YEL” wire terminal of temperature control actuator connector and vehicle body
ground with ignition switch turned ON.
Is voltage 4 – 6 V? Go to Step 10. Go to Step 7.
7 Position sensor signal circuit check
1) Disconnect connector from HVAC control module with
ignition switch turned OFF.
2) Measure resistance between “YEL” wire terminal of temperature control actuator connector and “G52-13”
terminal of HVAC control module connector.
Is resistance below 5
Ω? Go to Step 8. “YEL” wire open or high
resistance circuit.

Downloaded from www.Manualslib.com manuals search engine Air Conditioning System: Automatic Type 7B-55
DTC B1512: Air flow Control Actuator (Position Sensor) and/or Its Circuit MalfunctionS7RS0B7224014
Wiring Diagram
DTC Detecting Condition and Trouble Area8
Position sensor signal circuit check
1) Measure resistance between “YEL” wire terminal of
temperature control actuator connector and vehicle body
ground.
Is resistance infinity? Go to Step 9. “YEL” wire shorted to
ground circuit.
9 Position sensor signal circuit check
1) Measure voltage between “YEL” wire terminal of
temperature control actuator connector and vehicle body
ground with ignition switch turned ON.
Is voltage 0 V? Go to Step 10. “YEL” wire shorted to
other circuit.
10 Position sensor ground circuit check
1) Connect HVAC control module connector with ignition
switch turned OFF.
2) Measure resistance between “ORN” wire terminal of temperature control actuator connector and vehicle body
ground.
Is resistance below 5
Ω? Go to Step 12. Go to Step 11.
11 Position sensor ground circuit check
1) Measure resistance between “G52-3” terminal of HVAC
control module connector and vehicle body ground.
Is resistance below 5
Ω? “ORN” wire open or high
resistance circuit.
HVAC control module
faulty.
12 Temperature control actuator check
1) Check temperature control actuator referring to
“Temperature Control Actuator Inspection”.
Is it in good condition? HVAC control module
faulty.
Temperature control
actuator faulty.
Step Action Yes No
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G51
M 12V
5V 5V
WHT/BLU
WHT
BRN/WHT
BRN/YEL
2
1
ORN
G51-1
G51-2
G52-1
G52-14
G52-3
3
4
I5RS0A722014-01
1. HVAC control module 2. Air flow control actuator3.To temperature control actuator 4. To other sensors
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-56 Air Conditioning System: Automatic Type
DTC TroubleshootingStep Action YesNo
1 Position sensor power supply circuit check
1) Disconnect air flow control actuator connector.
2) Check for proper connection to air flow control actuator
at “WHT”, “WHT/BLU” and “ORN” wire terminals.
3) If OK, measure voltage between “WHT” wire terminal of air flow control actuator connector and vehicle body
ground with ignition switch turned ON.
Is voltage 4 – 6 V? Go to Step 6.
Go to Step 2.
2 Position sensor power supply circuit check
1) Disconnect temperature control actuator connector with
ignition switch turned OFF.
2) Measure voltage between “WHT” wire terminal of air flow control actuator connector and vehicle body ground with
ignition switch turned ON.
Is voltage 4 – 6 V? Temperature control
actuator faulty.
Go to Step 3.
3 Position sensor power supply circuit check
1) Disconnect connector from HVAC control module with
ignition switch turned OFF.
2) Check for proper connection to HVAC control module connector at “G52-1”, “G52-3” and “G52-14” terminals.
3) If OK, measure resistance between “WHT” wire terminal of air flow control actuator connector and “G52-1”
terminal of HVAC control module connector.
Is resistance below 5
Ω? Go to Step 4. “WHT” wire open or
high resistance circuit.
4 Position sensor power supply circuit check
1) Measure resistance between “WHT” wire terminal of air
flow control actuator connector and vehicle body ground.
Is resistance infinity? Go to Step 5. “WHT” wire shorted to
ground circuit.
5 Position sensor power supply circuit check
1) Measure voltage between “WHT” wire terminal of air flow
control actuator connector and vehicle body ground with
ignition switch turned ON.
Is voltage 0 V? Go to Step 6. “WHT” wire shorted to
other circuit.
6 Position sensor signal circuit check
1) Connect HVAC control module connector with ignition
switch turned OFF.
2) Measure voltage between “WHT/BLU” wire terminal of air flow control actuator connector and vehicle body
ground with ignition switch turned ON.
Is voltage 4 – 6 V? Go to Step 10. Go to Step 7.
7 Position sensor signal circuit check
1) Disconnect connector from HVAC control module with
ignition switch turned OFF.
2) Measure resistance between “WHT/BLU” wire terminal of air flow control actuator connector and “G52-14”
terminal of HVAC control module connector.
Is resistance below 5
Ω? Go to Step 8. “WHT/BLU” wire open
or high resistance
circuit.

Downloaded from www.Manualslib.com manuals search engine Air Conditioning System: Automatic Type 7B-57
DTC B1513: Temperature Control Actuator and/or Its Circuit MalfunctionS7RS0B7224015
Wiring Diagram
DTC Detecting Condition and Trouble Area8
Position sensor signal circuit check
1) Measure resistance between “WHT/BLU” wire terminal
of air flow control actuator connector and vehicle body
ground.
Is resistance infinity? Go to Step 9. “WHT/BLU” wire
shorted to ground
circuit.
9 Position sensor signal circuit check
1) Measure voltage between “WHT/BLU” wire terminal of
air flow control actuator connector and vehicle body
ground with ignition switch turned ON.
Is voltage 0 V? Go to Step 10. “WHT/BLU” wire
shorted to other circuit.
10 Position sensor ground circuit check
1) Connect HVAC control module connector with ignition
switch turned OFF.
2) Measure resistance between “ORN” wire terminal of air flow control actuator connector and vehicle body ground.
Is resistance below 5
Ω? Go to Step 12. Go to Step 11.
11 Position sensor ground circuit check
1) Measure resistance between “G52-3” terminal of HVAC
control module connector and vehicle body ground.
Is resistance below 5
Ω? “ORN” wire open or high
resistance circuit.
HVAC control module
faulty.
12 Air flow control actuator check
1) Check air flow control actuator referring to “Air Flow
Control Actuator Inspection”.
Is it in good condition? HVAC control module
faulty.
Air flow control actuator
faulty.
Step Action Yes No
7812910
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G51
M 12V
5V 5V
YEL
WHT
GRY/BLU
GRY/RED
2
1
ORN
G51-3
G51-4
G52-1
G52-13
G52-3
3
4
I5RS0A722013-01
1. HVAC control module 2. Temperature control actuator 3. To air flow control actuator 4. To other sensors
DTC Detecting Condition Trouble Area
Difference between target opening an d actual opening is higher than
specified value even though temperature control actuator has operated for 16
seconds. • Temperature control actuator circuit
• Temperature control linkage
• Temperature control actuator
• HVAC unit
• HVAC control module

Downloaded from www.Manualslib.com manuals search engine 7B-58 Air Conditioning System: Automatic Type
DTC Troubleshooting
NOTE
• When DTC B1502, B1503 and B1514 are indicated together, it is possible that “ORN” wire circuit open.
• When DTC B1514 is indicated together, it is possible that “WHT” wire circuit open.

Step Action YesNo
1 DTC check
1) Connect scan tool to DLC with ignition switch turned
OFF.
2) Turn ON ignition switch and check DTC.
Is there DTC B1511? Go to applicable DTC
diag. flow.
Go to Step 2.
2 Visual check
1) 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 3.
Obstruction in operating
range of actuator
linkage, actuator linkage
faulty and/or internal
fault of HVAC unit.
3 Wire harness check
1) Disconnect connector from temperature control actuator
with ignition swit ch turned OFF.
2) Check for proper connection to temperature control actuator connector at “GRY /BLU” and “GRY/RED” wire
terminals.
3) If OK, measure voltage between “GRY/BLU” wire terminal of temperature control actuator connector and
vehicle body ground with ignition switch turned ON when
temperature selector is operation to COOL direction.
Is voltage 10 – 14 V? Go to Step 7.
Go to Step 4.
4 Wire harness check
1) Disconnect connector from HVAC control module with
ignition switch turned OFF.
2) Check for proper connection to HVAC control module connector at “G51-3” and “G51-4” terminals.
3) If OK, measure resistance between “GRY/BLU” wire terminal of temperature control actuator connector and
“G51-3” terminal of HVAC control module connector.
Is resistance below 5
Ω? Go to Step 5. “GRY/BLU” wire open or
high resistance circuit.
5 Wire harness check
1) Measure resistance between “GRY/BLU” wire terminal
of temperature control actuator connector and vehicle
body ground.
Is resistance infinity? Go to Step 6.
“GRY/BLU” wire shorted
to ground circuit.
6 Wire harness check
1) Measure voltage between “GRY/BLU” wire terminal of
temperature control actuator connector and vehicle body
ground with ignition switch turned ON.
Is voltage 0 V? Go to Step 7.
“GRY/BLU” wire shorted
to other circuit.

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7Wire harness check
1) Connect connector to HVAC control module with ignition
switch turned OFF.
2) Measure voltage between “GRY/RED” wire terminal of temperature control actuator connector and vehicle body
ground with ignition switch turned ON when temperature
selector is operation to HOT direction.
Is voltage 10 – 14 V? Go to Step 11. Go to Step 8.
8 Wire harness check
1) Disconnect connector from HVAC control module with
ignition switch turned OFF.
2) Check for proper connection to HVAC control module connector at “G51-3” and “G51-4” terminals.
3) If OK, measure resistance between “GRY/RED” wire terminal of temperature control actuator connector and
“G51-4” terminal of HVAC control module connector.
Is resistance below 5
Ω? Go to Step 9. “GRY/RED” wire open
or high resistance
circuit.
9 Wire harness check
1) Measure resistance between “GRY/RED” wire terminal
of temperature control actuator connector and vehicle
body ground.
Is resistance infinity? Go to Step 10. “GRY/RED” wire
shorted to ground
circuit.
10 Wire harness check
1) Measure voltage between “GRY/RED” wire terminal of
temperature control actuator connector and vehicle body
ground with ignition switch turned ON.
Is voltage 0 V? Go to Step 11. “GRY/RED” wire
shorted to other circuit.
11 Position sensor circuit check
1) Check temperature control actuator position sensor
circuit referring to Step 1 to Step 5 and Step 10 to Step
11 of “DTC B1511: Temperature Control Actuator
(Position Sensor) and/or Its Circuit Malfunction”.
Is it in good condition? Go to Step 12. Repair circuit.
12 Temperature control actuator check
1) Check temperature control actuator referring to
“Temperature Control Actuator Inspection”.
Is it in good condition? HVAC control module
faulty.
Temperature control
actuator faulty.
Step Action Yes No

Downloaded from www.Manualslib.com manuals search engine 7B-60 Air Conditioning System: Automatic Type
DTC B1514: Air Flow Control Actuator and/or Its Circuit MalfunctionS7RS0B7224016
Wiring Diagram
DTC Detecting Condition and Trouble Area
DTC Troubleshooting
NOTE
• When DTC B1502, B1503 and B1513 are indicated together, it is possible that “ORN” wire circuit open.
• When DTC B1513 is indicated together, it is possible that “WHT” wire circuit open.

7812910
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G51
M 12V
5V 5V
WHT/BLU
WHT
BRN/WHT
BRN/YEL
2
1
ORN
G51-1
G51-2
G52-1
G52-14
G52-3
3
4
I5RS0A722014-01
1. HVAC control module 2. Air flow control actuator3. To temperature control actuator 4. To other sensors
DTC Detecting Condition Trouble Area
Difference between target opening and actual opening is higher than
specified value even though air flow control actuator has operated for 16
seconds. • Air flow control actuator circuit
• Air flow control linkage
• Air flow control actuator
• HVAC unit
• HVAC control module
Step
Action YesNo
1 DTC check
1) Connect scan tool to DLC with ignition switch turned
OFF.
2) Turn ON ignition switch and check DTC.
Is there DTC B1512? Go to applicable DTC
diag. flow.
Go to Step 2.
2 Visual check
1) 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 3.
Obstruction in operating
range of actuator
linkage, actuator linkage
faulty and/or internal
fault of HVAC unit.
3 Wire harness check
1) Disconnect connector from air flow control actuator with
ignition switch turned OFF.
2) Check for proper connection to air flow control actuator
connector at “BRN/WHT” and “BRN/YEL” wire terminals.
3) If OK, measure voltage between “BRN/WHT” wire terminal of air flow control actuator connector and
vehicle body ground with ignition switch turned ON when
air flow selector is operation to DEF direction.
Is voltage 10 – 14 V? Go to Step 7.
Go to Step 4.

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4Wire harness check
1) Disconnect connector from HVAC control module with
ignition switch turned OFF.
2) Check for proper connection to HVAC control module connector at “G51-1” and “G51-2” terminals.
3) If OK, measure resistance between “BRN/WHT” wire terminal of air flow contro l actuator connector and “G51-
1” terminal of HVAC control module connector.
Is resistance below 5
Ω? Go to Step 5. “BRN/WHT” wire open
or high resistance
circuit.
5 Wire harness check
1) Measure resistance between “BRN/WHT” wire terminal
of air flow control actuator connector and vehicle body
ground.
Is resistance infinity? Go to Step 6.
“BRN/WHT” wire
shorted to ground
circuit.
6 Wire harness check
1) Measure voltage between “BRN/WHT” wire terminal of
air flow control actuator connector and vehicle body
ground with ignition switch turned ON.
Is voltage 0 V? Go to Step 7.
“BRN/WHT” wire
shorted to other circuit.
7 Wire harness check
1) Connect connector to HVAC control module with ignition
switch turned OFF.
2) Measure voltage between “BRN/YEL” wire terminal of air flow control actuator connector and vehicle body ground
with ignition switch turned ON when air flow selector is
operation to FACE direction.
Is voltage 10 – 14 V? Go to Step 11. Go to Step 8.
8 Wire harness check
1) Disconnect connector from HVAC control module with
ignition switch turned OFF.
2) Check for proper connection to HVAC control module connector at “G51-1” and “G51-2” terminals.
3) If OK, measure resistance between “BRN/YEL” wire terminal of air flow contro l actuator connector and “G51-
2” terminal of HVAC control module connector.
Is resistance below 5
Ω? Go to Step 9. “BRN/YEL” wire open or
high resistance circuit.
9 Wire harness check
1) Measure resistance between “BRN/YEL” wire terminal of
air flow control actuator connector and vehicle body
ground.
Is resistance infinity? Go to Step 10. “BRN/YEL” wire shorted
to ground circuit.
10 Wire harness check
1) Measure voltage between “BRN/YEL” wire terminal of air
flow control actuator connector and vehicle body ground
with ignition switch turned ON.
Is voltage 0 V? Go to Step 11. “BRN/YEL” wire shorted
to other circuit.
Step Action Yes No