2005 SUZUKI SWIFT Inspection

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Description for Each Step
Step 1. Customer complaint analysis
Talk to customer, and then record details of the problem.
Customer questionnaire (Example)
NOTE
The from is a standard sample. It should be modified according to conditions characteristic of each
market.

Step 2. Visual inspection
As a preliminary step, be sure to perform visual check of th e items that support proper function of the air conditioning
referring to “Visual Inspection”.
Step 3. DTC check
Check DTC referring to “DTC Check”.
Step 4. Troubleshooting malfunction
Based on the DTC, perform an applicable DTC diagnostic flow and locate the cause of the trouble, namely in a sensor,
wire harness, connector, actuat or, HVAC control module or other part and repair faulty parts.
Step 5. A/C system symptom diagnosis
Check any part or system suspected to be a possible cause referring to “A/C System Symptom Diagnosis”.
Step 6. Check for intermittent problem
Check any part where an intermittent trouble is easy to oc cur (e.g., wire harness, connector, etc.), referring to
“Intermittent and Poor Connection Inspection in Sect ion 00” and related circuit of trouble cord recorded.
I4RH01722014-01

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Step 7. Final confirmation test
Confirm if the problem symptom is troubleshoot and the A/C system is free from any abnormal conditions. If there
existed DTC, clear the DTC. Then , check if the DTC is still detected and if there is any other DTC.
Visual InspectionS7RS0B7224009
Check visually the following parts and systems.
DTC B1502: Inside Air Temperature Sensor and/or Its Circuit MalfunctionS7RS0B7224010
Wiring Diagram
DTC Detecting Condition and Trouble Area
DTC Troubleshooting
NOTE
When DTC B1503, B1513 and B1514 are indicated together, it is possible that “ORN” wire circuit open.

Inspection item Correction
• Refrigerant ---- leakage and amount
• A/C pipe or hose ---- disconnection, looseness and deterioration
• A/C compressor drive belt ---- looseness and damage Refer to “Compressor Drive Belt Inspection and
Adjustment”.
• Battery ---- fluid level and corrosion of terminal
• Connectors of electric wire harn ess ---- disconnection and friction
• Fuses ---- burning
• Parts ---- installation and damage
• Other parts that can be checked visually
5V
PNK/BLK
ORN G52-6
G52-3
2
1
3
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1. HVAC control module
2. Inside air temperature sensor 3. To other sensors
DTC Detecting Condition Trouble Area
Inside air temperature sensor signal voltage is higher than or lower than
specified value for specified time continuously. • Inside air temperature sensor circuit
• Inside air temperature sensor
• HVAC control module
Step
Action YesNo
1 Inside air temperature sensor signal circuit check
1) Disconnect inside air temperature sensor connector.
2) Check for proper connection to inside air temperature
sensor at “PNK/BLK” and “ORN” wire terminals.
3) If OK, measure voltage between “PNK/BLK” wire terminal of inside air temp erature sensor connector and
vehicle body ground with ignition switch turned ON.
Is voltage 4 – 6 V? Go to Step 5.
Go to Step 2.

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DTC B1503: A/C Evaporator Air Temperature Sensor and/or Its Circuit MalfunctionS7RS0B7224011
Wiring Diagram2
Inside air temperature sensor signal 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 “G52-6” and “G52-3” terminals.
3) If OK, measure resistance between “PNK/BLK” wire terminal of inside air temp erature sensor connector and
“G52-6” terminal of HVAC control module connector.
Is resistance below 5
Ω? Go to Step 3. “PNK/BLK” wire open or
high resistance circuit.
3 Inside air temperature sensor signal circuit check
1) Measure resistance between “PNK/BLK” wire terminal of
inside air temperature sensor connector and vehicle
body ground.
Is resistance infinity? Go to Step 4.
“PNK/BLK” wire shorted
to ground circuit.
4 Inside air temperature sensor signal circuit check
1) Measure voltage between “PNK/BLK” wire terminal of
inside air temperature sensor connector and vehicle
body ground with ignition switch turned ON.
Is voltage 0 V? Go to Step 5.
“PNK/BLK” wire shorted
to other circuit.
5 Inside air temperature sensor ground circuit check
1) Connect HVAC control module connector with ignition
switch turned OFF.
2) Measure resistance between “ORN” wire terminal of inside air temperature sensor connector and vehicle
body ground.
Is resistance below 5
Ω? Go to Step 7. Go to Step 6.
6 Inside air temperature 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.
7 Inside air temperature sensor check
1) Check inside air temperature sensor referring to “Inside
Air Temperature Sensor Inspection”.
Is it in good condition? HVAC control module
faulty.
Inside air temperature
sensor faulty.
Step Action Yes No
5V
WHT/BLK
ORN G52-4
G52-3
2
1
3
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1. HVAC control module
2. Evaporator temperature sensor 3. To other sensors

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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.

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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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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

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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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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

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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
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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

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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