2006 SUZUKI SX4 PPL

Downloaded from www.Manualslib.com manuals search engine Air Conditioning System: Automatic Type 7B-69
DTC B1541: Back-Up Power Supply Circuit MalfunctionS6RW0D7224018
Wiring Diagram
DTC Detecting Condition and Trouble Area
NOTE
When checking DTC after connecting battery cable, be sure to turn ignition switch from OFF to ON and
from ON to OFF at least once, or DTC B1541 will be detected.

DTC Troubleshooting
12V5V
WHTG20-7 2
31G201 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 30WHT/RED [B]
I7RW01722011-01
[B]: Back-up power supply circuit 2. Main fuse
1. HVAC control module 3. Circuit fuse
DTC Detecting Condition Trouble Area
• Back-up power supply voltage is lower than specified value continuously.
• When connect battery with vehicle and then, turn ignition switch to ON
position for first time.• Battery voltage supply circuit
• 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) Turn ignition switch to ON position for 20 sec. or more.
2) Ignition switch turned OFF and connect scan tool to
DLC.
3) Turn ON ignition switch and check DTC.
Is there DTC B1541?Go to Step 3. Intermittent trouble.
Check for intermittent
referring to “Intermittent
and Poor Connection
Inspection in Section
00”.
3Battery voltage supply circuit check
1) Disconnect connector from HVAC control module with
ignition switch turned OFF.
2) Check for proper connection to back-up power supply
circuit terminal of HVAC control module connector.
3) If OK, measure voltage between back-up power supply
circuit terminal of HVAC control module connector and
vehicle body ground.
Is voltage 10 – 14 V?Substitute a known-
good HVAC control
module and recheck.Back-up power supply
circuit is open or
shorted to ground.

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 Air Conditioning System: Automatic Type 7B-71
DTC Detecting Condition and Trouble Area
DTC TroubleshootingDTC detecting condition Trouble area
Serial communication signal is higher than or lower than specified value for
specified time continuously.• Back-up power supply circuit
• Serial communication circuit
•BCM
• Information display
• HVAC control module
Step Action Yes No
1Was “Air Conditioning System Check” performed?Go to Step 2. Go to “Air Conditioning
System Check”.
2Back-up power supply circuit fuse check
1) Check back-up power supply circuit fuse for blowing.
Is fuse(s) blown?Replace blown fuse and
check for short in back-
up power supply circuit.Go to Step 3.
3Wire harness check
1) Turn ignition switch to OFF position.
2) Disconnect connectors from BCM, information display
and HVAC control module.
3) Check for proper connection to serial communication
circuit terminal of BCM, information display and HVAC
control module connectors.
4) If OK, check that serial communication circuit is as
follows.
• Wiring harness resistance of serial communication
circuit is less than 3 Ω
• Insulation resistance between serial communication
circuit terminal and vehicle body ground is Infinity
• Circuit voltage of serial communication circuit is 0 - 1
V with ignition switch turned ON
Are they in good condition?Go to Step 4. Serial communication
circuit is open, short or
high resistance.
4Serial communication signal check
1) Connect connectors to BCM and HVAC control module
with ignition switch turned OFF.
2) Turn ignition switch to ON position.
3) Check that serial communication signal is outputted from
BCM referring to “Voltage Check” under “Inspection of
BCM and Its Circuits in Section 10B”.
Is serial communication signal outputted?Replace information
display.Go to Step 5.
5Communication data check
1) Connect connector to information display with ignition
switch turned OFF.
2) Check that serial communication signal is outputted from
BCM referring to “Voltage Check” under “Inspection of
BCM and Its Circuits in Section 10B”.
Is serial communication signal outputted?Substitute a known-
good HVAC control
module and recheck.Substitute a known-
good BCM and recheck.

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 Air Conditioning System: Automatic Type 7B-73
DTC B1557: VSS Signal FailureS6RW0D7224023
DTC Detecting Condition and Trouble Area
DTC Troubleshooting
DTC B1561: ECT Signal FailureS6RW0D7224024
DTC Detecting Condition and Trouble Area
DTC TroubleshootingDTC detecting condition Trouble area
HVAC control module receives invalid data of VSS signal from BCM. • VSS circuit
• VSS
• 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 P0500 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 ECT signal from BCM. • ECT sensor circuit
• ECT 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 P0116, P0117 or P0118 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 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.

Downloaded from www.Manualslib.com manuals search engine Table of Contents 8- i
8
Section 8
CONTENTS
Restraint
Precautions ................................................. 8-1
Precautions............................................................. 8-1
Precautions on Restraint ....................................... 8-1
Seat Belts ................................................. 8A-1
Precautions........................................................... 8A-1
Precautions on Service and Diagnosis of Seat
Belt .................................................................... 8A-1
General Description ............................................. 8A-2
Seat Belt Construction ........................................ 8A-2
Diagnostic Information and Procedures ............ 8A-3
Repair and Inspection Required after
Accident ............................................................ 8A-3
Repair Instructions .............................................. 8A-4
Front Seat Belt Components ............................... 8A-4
Front Seat Belt Removal and Installation ............ 8A-5
Front Seat Belt Inspection................................... 8A-6
Rear Seat Belt Components ............................... 8A-7
Rear Seat Belt Removal and Installation ............ 8A-8
Rear Seat Belt Inspection ................................... 8A-8
Specifications....................................................... 8A-8
Tightening Torque Specifications ........................ 8A-8
Air Bag System ........................................ 8B-1
Precautions........................................................... 8B-1
Precautions on Service and Diagnosis of Air
Bag System....................................................... 8B-1
Precautions on Handling and Storage of Air
Bag System Components ................................. 8B-1
Precautions on Disposal of Air Bag and Seat
Belt Pretensioner .............................................. 8B-5
General Description ............................................. 8B-5
Air Bag System Construction .............................. 8B-5
Air Bag System Block Diagram ........................... 8B-6
Air Bag System Input / Output Table .................. 8B-7
Schematic and Routing Diagram ........................ 8B-8
Air Bag System Wiring Circuit Diagram .............. 8B-8
Component Location ......................................... 8B-11
Air Bag System Components, Wiring and
Connectors Location ....................................... 8B-11
Diagnostic Information and Procedures .......... 8B-12
Air Bag Diagnostic System Check .................... 8B-12
Air Bag Diagnostic System Check Flow ............ 8B-13
DTC Table ......................................................... 8B-14DTC Check........................................................ 8B-18
DTC Clearance ................................................. 8B-18
Scan Tool Data ................................................. 8B-18
“AIR BAG” Warning Light Comes ON Steady ... 8B-19
“AIR BAG” Warning Light Does Not Come ON .. 8B-22
Serial Data Link Circuit Check .......................... 8B-23
DTC B1013: SDM Internal Failure .................... 8B-25
DTC B1014: “AIR BAG” Warning Light Circuit .. 8B-26
DTC B1016: Power Supply Voltage too High.... 8B-26
DTC B1017: Power Supply Voltage too Low .... 8B-27
DTC B1021: Front Air Bag Deployment
Record............................................................. 8B-28
DTC B1024 / B1025: Side Air-Bag
Deployment Record ........................................ 8B-29
DTC B1026: Seat Belt Pretensioner
Activation Record ............................................ 8B-29
DTC B1027: Number of Deployment Times
Exceeded Limit................................................ 8B-30
DTC B1031: Driver Air Bag Circuit High
Resistance ...................................................... 8B-31
DTC B1032: Driver Air Bag Circuit Low
Resistance ...................................................... 8B-33
DTC B1033: Driver Air Bag Circuit Shorted to
Ground ............................................................ 8B-35
DTC B1034: Driver Air Bag Circuit Shorted to
Power Supply .................................................. 8B-37
DTC B1041: Passenger Air Bag Circuit High
Resistance ...................................................... 8B-40
DTC B1042: Passenger Air Bag Circuit Low
Resistance ...................................................... 8B-43
DTC B1043: Passenger Air Bag Circuit
Shorted to Ground........................................... 8B-45
DTC B1044: Passenger Air Bag Circuit
Shorted to Power Supply ................................ 8B-46
DTC B1051 / B1055: Seat Belt Pretensioner
Circuit High Resistance ................................... 8B-48
DTC B1052 / B1056: Seat Belt Pretensioner
Circuit Low Resistance.................................... 8B-51
DTC B1053 / B1057: Seat Belt Pretensioner
Shorted to Ground........................................... 8B-52
DTC B1054 / B1058: Seat Belt Pretensioner
Circuit Shorted to Power Supply ..................... 8B-54
DTC B1061 / B1065: Side-Air Bag Circuit
High Resistance .............................................. 8B-55