2006 SUZUKI SX4 temperature sensor

Downloaded from www.Manualslib.com manuals search engine Air Conditioning System: Automatic Type 7B-67
DTC B1514: Air Flow Control Actuator (Motor) and/or Its Circuit MalfunctionS6RW0D7224016
Wiring Diagram
DTC Detecting Condition and Trouble Area
DTC Troubleshooting
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
41
[D]
I6RW0C722007-01
[D]: Air flow actuator motor drive circuit 2. Air flow control actuator 4. To other sensors
1. HVAC control module 3. To temperature control actuator
DTC Detecting Condition Trouble Area
Motor of air flow control actuator does not move longer than specified time. • Air flow control actuator circuit
• Air flow control linkage
• Air flow control actuator
• HVAC unit
• HVAC control module
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 B1512 detected together?Go to “DTC B1512: Air
flow 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 air flow control actuator and
HVAC control module.
3) Check for proper connection to actuator motor drive
circuit terminals of air flow control actuator and HVAC
control module connectors.
4) If OK, check that actuator motor drive circuit of air flow
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 air flow 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.

Downloaded from www.Manualslib.com manuals search engine 7B-68 Air Conditioning System: Automatic Type
DTC B1520 / B1521 / B1522: Temperature / Blower Speed / Air Flow Selector MalfunctionS6RW0D7224017
DTC Detecting Condition and Trouble Area
DTC Troubleshooting5Wire harness check
Check position sensor circuit of temperature control actuator
for condition referring to Step 2 of “DTC B1512: Air flow
Control Actuator (Position Sensor) and/or Its Circuit
Malfunction”.
Is it in good condition?Go to Step 6. Repair or replace.
6Air Flow control actuator check
1) Check 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. Step Action Yes No
DTC Detecting Condition Trouble Area
When internal malfunction is detected in the
HVAC control module.• Temperature selector included in HVAC control module (DTC
B1520)
• Blower speed selector included in HVAC control module (DTC
B1521)
• Air flow selector included in HVAC control module (DTC B1522)
Step Action Yes No
1Was “Air Conditioning System Check” performed?Go to Step 2. Go to “Air Conditioning
System Check”.
2DTC check
1) Clear DTC referring to “DTC Clearance”.
2) Recheck DTC.
Are DTC B1520, B1521 and/or B1522 still detected?Substitute a known
good HVAC control
module and recheck.Intermittent trouble.
Check for intermittent
referring to “Intermittent
and Poor Connection
Inspection in Section
00”.

Downloaded from www.Manualslib.com manuals search engine 7B-70 Air Conditioning System: Automatic Type
DTC B1546: A/C Refrigerant Pressure MalfunctionS6RW0D7224019
DTC Detecting Condition and Trouble Area
DTC Troubleshooting
DTC B1551: Serial Communication Circuit MalfunctionS6RW0D7224020
Wiring DiagramDTC detecting condition Trouble area
• A/C refrigerant pressure sensor signal voltage is lower than specified value
even though outside air temperature is higher than specified value for
specified time continuously.
• Insufficient refrigerant in A/C system• Insufficient of refrigerant
• A/C refrigerant pressure sensor
• Outside air 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”.
2DTC check
1) Connect scan tool to DLC with ignition switch turned
OFF.
2) Turn ignition switch to ON position and check DTC in
BCM.
Is DTC B1141 or B1142 (BCM) detected?Go to applicable DTC
diag. flow.Go to Step 3.
3DTC check
Check DTC in ECM.
Is DTC P0532 or P0533 detected?Go to applicable DTC
diag. flow.Go to Step 4.
4A/C refrigerant pressure and outside air temperature
data check
1) Start engine and select “DATA LIST” mode on scan tool.
2) Check “Refrigerant Pressure” and “Outside Air Temp”
displayed on scan tool.
Are values of A/C refrigerant pressure sensor and outside air
temperature within specified ranges indicated in “Scan Tool
Data”?Substitute a known-
good HVAC control
module and recheck.Check the amount of
refrigerant and system
for leaks.
12V
G20
G20-13YEL
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
1
2 3
[S]WHT/REDWHTG20-7
12V5V
[B]4 4
I7RW01722012-02
[B]: Back-up power supply circuit 1. HVAC control module 3. Information display
[S]: Serial communication circuit 2. BCM 4. Circuit fuse

Downloaded from www.Manualslib.com manuals search engine 7B-72 Air Conditioning System: Automatic Type
DTC B1552: HVAC Control Module Check Sum ErrorS6RW0D7224021
DTC Detecting Condition and Trouble Area
DTC Troubleshooting
DTC B1553: CAN Communication Circuit MalfunctionS6RW0D7224022
DTC Detecting Condition and Trouble Area
DTC TroubleshootingDTC detecting condition Trouble area
Data received by HVAC control module from BCM is erroneous continuously. • BCM
• HVAC control module
Step Action Yes No
1Was “Air Conditioning System Check” performed?Go to Step 2. Go to “Air Conditioning
System Check”.
2Serial communication signal data check
1) Connect scan tool to DLC with ignition switch turned
OFF.
2) Start engine and select “DATA LIST” mode on scan tool.
3) Check “Refrigerant Pressure”, “Vehicle Speed”, “Coolant
Temp” and “Outside Air Temp” displayed on scan tool.
Are values of A/C refrigerant pressure sensor and outside air
temperature within specified ranges indicated in “Scan Tool
Data”?Intermittent trouble.
Check for intermittent
referring to “Intermittent
and Poor Connection
Inspection in Section
00”Substitute a known-
good HVAC control
module and recheck.
If DTC is still detected
substitute a known-
good BCM and recheck.
DTC detecting condition Trouble area
HVAC control module receives error code from BCM continuously. • CAN communication circuit
•BCM
•ECM
• Combination meter
• HVAC control module
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) Check DTC in BCM.
Is DTC U0073 (No.0073), U0100 (No.0100) and/or U0155
(No.0155) detected?Go to applicable DTC
diag. flow.Substitute a known-
good HVAC control
module and recheck.

Downloaded from www.Manualslib.com manuals search engine 7B-74 Air Conditioning System: Automatic Type
DTC B1562: Outside Air Temperature Signal FailureS6RW0D7224025
DTC Detecting Condition and Trouble Area
DTC Troubleshooting
DTC B1563: A/C Refrigerant Pressure Signal FailureS6RW0D7224026
DTC Detecting Condition and Trouble Area
DTC TroubleshootingDTC detecting condition Trouble area
HVAC control module receives invalid data of outside air temperature signal
from BCM.• Outside air temperature sensor
circuit
• Outside air 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”.
2DTC check
1) Connect scan tool to DLC with ignition switch turned
OFF.
2) Check DTC in BCM.
Is DTC B1141 or B1142 detected?Go to applicable DTC
diag. flow.Substitute a known-
good HVAC control
module and recheck.
DTC detecting condition Trouble area
HVAC control module receives invalid data of A/C refrigerant pressure signal
from BCM.• A/C refrigerant pressure sensor
circuit
• A/C refrigerant pressure sensor
• HVAC control module
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) Check DTC in ECM.
Is DTC P0532 or P0533 detected?Go to applicable DTC
diag. flow.Substitute a known-
good HVAC control
module and recheck.

Downloaded from www.Manualslib.com manuals search engine Air Conditioning System: Automatic Type 7B-77
G20-8 BLU/WHTElectric load signal for
blower motor10 – 14 V• Ignition switch turned ON, blower speed selector
OFF or 1st position
• Ignition switch turned ON, blower speed selector
from 1st to 2nd position
0 – 2 V• Ignition switch turned ON, blower speed selector
between 3rd and HIGH position
• Ignition switch turned ON, blower speed selector
from 3rd to 2nd position
G20-9 WHT/BLKEvaporator temperature
sensor signalApprox. 2.6 VIgnition switch turned ON, evaporator temperature 0
°C (32 °F)
Approx. 1.7 VIgnition switch turned ON, evaporator temperature
15 °C (59 °F)
Approx. 1.0 VIgnition switch turned ON, evaporator temperature
30 °C (86 °F)
G20-10 PNK/BLKInside air temperature
sensor signalApprox. 2.5 VIgnition switch turned ON, room temperature 25 °C
(77 °F)
Approx. 3.7 VIgnition switch turned ON, room temperature 0 °C
(32 °F)
G20-11 — — —
G20-12 WHTOutput of 5 V power
source for air flow control
actuator position sensor
and temperature control
actuator position sensor4 – 6 V Ignition switch turned ON
G20-13 YELSerial communication line
of BCMRefer to “Reference waveform No. 2: Automatic Type”.
G20-14 — — — —
G20-15 BRN/YELAir flow control actuator
(FACE)10 – 14 VIgnition switch turned ON, air flow control actuator is
working in operation from “DEF” to “FACE” position
0 – 1 VIgnition switch turned ON, except the above
condition
G20-16 BRN/WHTAir flow control actuator
(DEF)10 – 14 VIgnition switch turned ON, air flow control actuator is
working in operation from “FACE” to “DEF” position
0 – 1 VIgnition switch turned ON, except the above
condition
G20-17 GRNAir intake actuator
(FRESH AIR)0 – 1 VIgnition switch turned ON, air intake selector “FRE”
position
10 – 14 VIgnition switch turned ON, air intake selector “REC”
position
G20-18 REDAir intake actuator
(RECIRCULATION AIR)0 – 1 VIgnition switch turned ON, air intake selector “REC”
position
10 – 14 VIgnition switch turned ON, air intake selector “FRE”
position
G20-19 GRN/REDAir intake actuator (MIX
AIR)10 – 14 VIgnition switch turned ON, air intake selector “FRE”
or “REC” position
0 – 1 VIgnition switch turned ON, air intake selector is
working in operation from “FRE” to “REC” or “REC”
to “FRE” position
G20-20 — — — —
G20-21 GRN/WHT A/C switch signal Refer to “Reference waveform No. 1: Automatic Type”.
G20-22 RED/BLK Electric power source 10 – 14 V Ignition switch turned ON
G20-23 BLK/ORNGround for HVAC control
moduleBelow 0.5 V Ignition switch turned ON
G20-24 ORN Ground for sensors Below 0.5 V Ignition switch turned ON Terminal Wire Color CircuitNormal
Vo l ta g eCondition

Downloaded from www.Manualslib.com manuals search engine 7B-78 Air Conditioning System: Automatic Type
G20-25 PNK Sunload sensor signalApprox. 3.5 VIgnition switch turned ON, amount of insolation is
500 W/m2
Approx. 5 VIgnition switch turned ON, amount of insolation is 0
W/m2
G20-26 BLK/RED Rear defogger indicator0 – 1 V Ignition switch turned ON, rear defogger switch OFF
10 – 14 V Ignition switch turned ON, rear defogger switch ON
G20-27 YELTemperature control
actuator position sensor
signalApprox. 0.5 VIgnition switch turned ON, temperature selector
“MAX COOL” position
Approx. 4.5 VIgnition switch turned ON, temperature selector
“MAX HOT” position
G20-28 WHT/BLUAir flow control actuator
position sensor signalApprox. 0.5 VIgnition switch turned ON, air flow selector “FACE”
position
Approx. 4.5 VIgnition switch turned ON, air flow selector “DEF”
position
G20-29 GRY Blower motor controller0 – 1 VIgnition switch turned ON, blower speed selector
OFF position
2 – 3.5 VIgnition switch turned ON, blower speed selector
between 1st and 6th position
Approx. 10.0
VIgnition switch turned ON, blower speed selector 7th
and HIGH position
G20-30 BLU/REDBlower motor control
voltage feedback10 – 14 VIgnition switch turned ON, blower speed selector
OFF position
Approx. 8.1 VIgnition switch turned ON, blower speed selector 1st
position
Approx. 6.8 VIgnition switch turned ON, blower speed selector 2nd
position
Approx. 5.5 VIgnition switch turned ON, blower speed selector 3rd
position
Approx. 4.0 VIgnition switch turned ON, blower speed selector 4th
position
Approx. 2.6 VIgnition switch turned ON, blower speed selector 5th
position
Approx. 1.2 VIgnition switch turned ON, blower speed selector 6th
position
Approx. 0.2 VIgnition switch turned ON, blower speed selector 7th
and HIGH position Terminal Wire Color CircuitNormal
Vo l ta g eCondition

Downloaded from www.Manualslib.com manuals search engine 7B-80 Air Conditioning System: Automatic Type
HVAC Unit ComponentsS6RW0D7226002
1
10
1
29
9
8
3
29
21
3
20 20
20
19
23
22
5*
4
28*15 16*
30
29*
30
17*
18*2 1312 11
5*
26
2725
1424
29
67
*
I6RW0C722008-01
1. Blower upper case 9. Air intake control link 17. Expansion valve 25. Inside air temperature sensor
2. Blower lower case 10. Air intake control door 18. Expansion pipe 26. Aspirator
3. Heater unit upper case 11. Blower motor 19.Air flow control actuator 27. Aspirator hose
4. Heater unit lower case 12. Blower motor cap 20. Air flow control links 28. Drain hose
5. Foot duct 13. Blower motor controller 21. Air flow control door assembly 29. Packing
6. HVAC air filter (if equipped) 14. Heater core 22. Temperature control actuator 30. O-ring
: Apply compressor oil.
7. Cover (without HVAC air
filter)15. Evaporator 23. Temperature control link : Do not reuse.