G52 SUZUKI SWIFT 2008 2.G Service User Guide

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
65 431516 14 13 12 11
G52
789101920121112
65 431718 16 15 14 13
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.

Downloaded from www.Manualslib.com manuals search engine 7B-62 Air Conditioning System: Automatic Type
DTC B1541: HVAC Control Module Back-Up Power Supply MalfunctionS7RS0B7224017
Wiring Diagram
DTC Detecting Condition and Trouble Area
DTC Troubleshooting11
Position sensor circuit check
1) Check air flow control actuator position sensor circuit
referring to Step 1 to Step 5 and Step 10 to Step 11 of
“DTC B1512: Air flow Control Actuator (Position Sensor)
and/or Its Circuit Malfunction”.
Is it in good condition? Go to Step 12. Repair circuit.
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
WHT/RED
2 17812910
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G52
789101920121112
65 431718 16 15 14 13
G51
3
G52-16
I5RS0A722015-01
1. HVAC control module
2. Junction block assembly 3. Circuit fuse
DTC Detecting Condition Trouble Area
Back-up power supply voltage is lo wer than specified value continuously. • Battery voltage supply circuit
• HVAC control module
StepAction YesNo
1 DTC check
1) Turn ON ignition switch for 20 sec. or more.
2) Ignition switch turned OF F and connect scan tool to
DLC.
3) Turn ON ignition switch and check DTC.
Is there DTC B1541? Go to Step 2.
Intermittent trouble.
Check for intermittent
referring to “Intermittent
and Poor Connection
Inspection in Section
00”.
2 Battery voltage 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 “G52-16” terminal.
3) If OK, measure voltage between “G52-16” terminal of HVAC control module connector and vehicle body
ground.
Is voltage 10 – 14 V? HVAC control module
faulty.
Circuit fuse blown and/
or “WHT/RED” wire
circuit open or short.

Downloaded from www.Manualslib.com manuals search engine Air Conditioning System: Automatic Type 7B-63
DTC B1546: A/C Refrigerant Pressure MalfunctionS7RS0B7224018
DTC Detecting Condition and Trouble Area
DTC Troubleshooting
DTC B1551: Serial Communication Circuit MalfunctionS7RS0B7224019
Wiring DiagramDTC detecting condition Trouble area
A/C refrigerant pressure sensor signal voltage is lower t han specified value
even though outside air temperature is higher than specified value for
specified time continuously. • Insufficient of refrigerant
• A/C refrigerant pressure sensor
• Outside air temperature sensor
• HVAC control module
Step
Action YesNo
1 A/C refrigerant pressure and outside air temperature
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” and “Outside Air Temp” varies displayed on scan tool.
Is displayed each va ries described varies in “Scan Tool
Data”? Go to Step 2.
Check the amount of
refrigerant and system
for leaks.
2 A/C system performance check
1) Check A/C system performance referring to “A/C System
Performance Inspection”.
Is check result satisfactory? Go to Step 3.
Repair or replace
defective part.
3 A/C refrigerant pressure sensor check
1) Check A/C refrigerant pressure sensor referring to “A/C
Refrigerant Pressure Sensor and Its Circuit Inspection”.
Is check result satisfactory? Go to Step 4.
A/C refrigerant pressure
sensor faulty.
4 Outside air temperature sensor check
1) Check outside air temperature sensor referring to
“Information Display (Clock) Removal and Installation in
Section 9C”.
Is check result satisfactory? HVAC control module
faulty.
Outside air temperature
sensor faulty.
YEL17812910
65 431516 14 13 12 11
G52
789101920121112
65 431718 16 15 14 13
G51
G51-7
12V
2
3
G37-11
I5RS0A722016-01
1. HVAC control module 2. BCM3. Information display

Downloaded from www.Manualslib.com manuals search engine Air Conditioning System: Automatic Type 7B-67
Inspection of HVAC Control Module and Its CircuitS7RS0B7224026
HVAC control module and its circuits can be checked at HVAC control module wiring couplers by measuring voltage.
CAUTION!
HVAC control module can not be checked by itself. It is strictly prohibited to connect voltmeter to
HVAC control module with couplers disconnected from it.

Voltage Check
1) Remove HVAC control module referring to “HVAC Control Module Removal and Installation”.
2) Check voltage at each terminal.
NOTE
As each terminal voltage is affected by the battery voltage, confirm that it is 11 V or more when ignition
switch is ON.

7812910
65 431516 14 13 12 11
G52
789101920121112
65 431718 16 15 14 13
G51
1
2
I5RS0A722017-02
1. HVAC control module2. HVAC control module connector (viewed from harness side)
Terminal Wire Color CircuitNormal
Vo l ta g e Condition
G51-1 BRN/WHT Air flow control actuator
(DEF) 10 – 14 V
Ignition switch turned ON, ai
r flow control actuator is
working in operation fr om VENT to DEF position
0 – 1 V Ignition switch turned ON, except the above condition
G51-2 BRN/YEL Air flow control actuator
(FACE) 10 – 14 V
Ignition switch turned ON, ai
r flow control actuator is
working in operation fr om DEF to VENT position
0 – 1 V Ignition switch turned ON, except the above condition
G51-3 GRY/BLU Temperature control
actuator (COOL) 10 – 14 VIgnition switch turned ON, temperature control
actuator is working in ope
ration from HOT to COOL
position
0 – 1 V Ignition switch turned ON, except the above condition
G51-4 GRY/RED Temperature control
actuator (HOT) 10 – 14 VIgnition switch turned ON, temperature control
actuator is working in operation from COOL to HOT
position
0 – 1 V Ignition switch turned ON, except the above condition
G51-5 PPL/WHT Serial communication line
of data link connector 10 – 14 V Ignition switch turned ON
G51-6 — — — —
G51-7 YEL Serial communication line
of BCM Refer to “Inspection of BCM a
nd its Circuits in Section 10B”

Downloaded from www.Manualslib.com manuals search engine Air Conditioning System: Automatic Type 7B-69
Terminal Wire Color CircuitNormal
Vo l ta g e Condition
G52-1 WHT Output of 5 V power
source for air flow control
actuator position sensor
and temperature control
actuator position sensor 4 – 6 V Ignition switch turned ON
G52-2 PNK Output of 5 V power
source for sunload sensor 4 – 6 V Ignition switch turned ON
G52-3 ORN Ground for sensors Below 0.3 V Ignition switch turned ON
G52-4 WHT/BLK Evaporator temperature
sensor signal 3.45 – 3.65 V
Ignition switch turned ON, evaporator temperature 0
°
C (32 °F)
2.55 – 2.85 V Ignition switch turned ON, evaporator temperature
15
°C (59 ° F)
1.7 – 2.1 V Ignition switch turned ON, evaporator temperature
30
°C (86 ° F)
G52-5 YEL/BLK Sunload sensor signal
G52-6 PNK/BLK Inside air temperature
sensor signal About 2.0 V
Ignition switch turned ON, room temperature 25
°C
(77 °F)
About 2.8 V Ignition switch turned ON, room temperature 0
°C
(32 °F)
G52-7 — — — —
G52-8 RED/BLK Electric power source 10 – 14 V Ignition switch turned ON
G52-9 — — — —
G52-10 — — — —
G52-11 BLK/ORN Ground for HVAC control
module Below 0.3 V Ignition
switch turned ON
G52-12 — — — —
G52-13 YEL Temperature control
actuator position sensor
signal About 4.0 V
Ignition switch turned ON, temperature selector MAX
COOL position
About 2.0 V Ignition switch turned ON, temperature selector MAX
HOT position
G52-14 WHT/BLU Air flow control actuator
position sensor signal About 4.0 V
Ignition switch turned ON
, air flow selector VENT
position
About 1.6 V Ignition switch ON, air flow selector DEF position
G52-15 — — — —
G52-16 WHT/RED Electric power source for
back-up 10 – 14 V Full-time

Downloaded from www.Manualslib.com manuals search engine Wiring Systems: 9A-18
G: Instrument panel harness (RHD)
G: Instrument panel harness
J/B
9
10
G33
G32 G34 G35
(TO E37)
G36
(TO E38)
G31 G29
G23
G53
G22
G21
G28G59
G20G52G27
G54
G261112G03
(TO L33)G04
(TO L32)
G46
G01
G02
G42
G43
(TO L51) G10
G47
G11
G13G49
G14
G09G25 G24G15
G12G50
G48
G17
G16G51
G19
G18
G06
G05
G
G09
G37
A
BManual A/C
Auto A/C
AB
I7RS0B910906-01
No./Color Connective position No./ColorConnective position
G01/GRN Air intake control ac tuatorG26/YEL Driver inflator
G02/N Keyless receiver G27/N COMB switch
G03/N Floor harness (To L33) G28/GRY COMB meter
G04/YEL Floor harness (To L32) G29/GRN (IF
EQPD) Front fog light switch
G05/N Blower motor G31/N J/C
G06/N Blower motor resister G32/N J/B
G09/N Evaporator temperature sensor G33/N J/B
G10/BLK Passenger inflator G34/N J/B
G11/N Hazard switch G35/GRY Main harness (To E37)
G12/BLU Audio G36/N Main harness (To E38)
G13/N Navigation G37/BLU BCM
G14/GRN Multi information display G42/N (IF
EQPD) KLS ECM
G15/GRY J/C G43/GRY (IF
EQPD) Floor harness (To L51)
G16/N or BLU J/C G46/N Blower motor controller
G17/N J/C G47/BLK Diode
G18/GRN HVAC control switch G48/N Temperature control actuator
G19/BRN Blower speed selector G49/GRN Air flow control actuator
G20/BLK DLC G50/N Inside air temperature sensor
G21/N IG switch G51/GRY Auto A/C unit
G22/N Main switch (Key switch) G52/GRY Auto A/C unit
G23/BLK COMB switch G53/N Sunload sensor
G24/BLK ICM G54/N (IF
EQPD) Steering angle sensor
G25/N COMB switch G59/N (IF
EQPD) J/C

Downloaded from www.Manualslib.com manuals search engine 9A-19 Wiring Systems:
G: Instrument panel harness (LHD)
G: Instrument panel harness
J/B
9
10
G33
G32 G34 G35
(TO E37)
G36
(TO E38)
G29
G40
G23
G53
G22 G21
G28
G20G52
G27G39 G26
G31
1112G03
(TO L33)G04
(TO L32)
G46
G02
G42
G43
(TO L51)
G10
G47G11
G13G01
G14
G49
G50G48
G25
G24
G12
G17
G16G51G19
G18
G06
G05
G
G09
G37
I5RS0C910910-03
No./Color Connective position No./ColorConnective position
G01/GRN Air intake control ac tuatorG26/YEL Driver inflator
G02/N Keyless receiver G27/N COMB switch
G03/N Floor harness (To L33) G28/GRY COMB meter
G04/YEL Floor harness (To L32) G29/GRN (IF
EQPD) Front fog light switch
G05/N Blower motor G31/N J/C
G06/N Blower motor resister G32/N J/B
G09/N Evaporator temperature sensor G33/N J/B
G10/BLK Passenger inflator G34/N J/B
G11/N Hazard switch G35/GRY Main harness (To E37)
G12/BLU Audio G36/N Main harness (To E38)
G13/N Navigation G37/BLU BCM
G14/GRN Multi information display G39/N (IF
EQPD) DRL controller
G15/GRY J/C G40/N (IF
EQPD) Headlight leveling switch
G16/N J/C G42/N (IF
EQPD) KLS ECM
G17/N J/C G43/GRY (IF
EQPD) Floor harness (To L51)
G18/GRN HVAC control switch G46/N Blower motor controller
G19/BRN Blower speed selector G47/BLK Diode
G20/BLK DLC G48/N Temperature control actuator
G21/N IG switch G49/GRN Air flow control actuator
G22/N Main switch (Key switch) G50/N Inside air temperature sensor
G23/BLK COMB switch G51/GRY Auto A/C unit
G24/BLK ICM G52/GRY Auto A/C unit
G25/N COMB switch G53/N Sunload sensor

Downloaded from www.Manualslib.com manuals search engine Wiring Systems: 9A-64
B-3 Rear Defogger Circuit DiagramS7RS0B910E012
L42
O013
BLK/RED
O02
1
O06
1
20
1
2
4
3
20A RR
DEF
41
Relay
17
BRN
G3717
G337
BLK/REDBLK/RED
L058
REAR DEF
HVAC control
unit
BLK/ORN
10
BLK/ORN
G15
J/C B
B
BLK
G18
G51
J/B
B
A
BR
J/B side connector (BCM)
Manual A/C
Auto A/C
ABC
BCM
BB
C
G18
G52B
C
C7
10B
B
C8
20
BC9
11
C
Auto
unit
I7RS0B910943-01

Downloaded from www.Manualslib.com manuals search engine 9A-91 Wiring Systems:
E-2 Auto A/C System Circuit DiagramS7RS0B910E033
12G53
G51
G52
G51
G52 G52 G51
251211
11
15
17
12V
198
REDGRN
RED/BLK
GRN/RED
RED/YEL
RED/YELRED/BLK
RED/BLKBLU/WHT
M
7133G01
8G34
ILL
Auto A/C panel
Sunload sensor
DLC Auto
unit
Air intake control actuator
BACK
10A24
"A-5"
PW
"A-5"BW"D-4"RY
18
GRN/WHT
"A-8"GW
ECMBCMBCM
BLK/ORN
YEL/BLKPNK
5
PPL/WHT
PPL/WHT
BLK/ORNBLK/YEL
5V 5V
12V
J/B
7
YEL
YEL
"A-8"Y
109
G31
J/C
D
D
G15
J/C
B
B
BLK
BLK
G31
J/C
C
C
G16
J/C
C
C
G15
J/C
A A
11
BLK
A
G16
J/C
A
A
J/C
BG31B B
16
5
I7RS0B910932-01

Downloaded from www.Manualslib.com manuals search engine Wiring Systems: 9A-92
G091
2
346
1698G52 G51
G52 G52
G51 G51G52
1
3
7
G495
6
M
G48
M
2
31141413
341
M
2G46
5G33
WHT/RED
WHT/RED
BLK/WHT
GRY/REDGRY/BLUWHTWHT/BLUBRN/WHTBRN/YELWHT/BLKGRN
WHTYELWHTWHT/BLU
GRNGRNBLKGRNGRN
BLK/YELBLK/YEL
BLK/WHTGRYBLK/WHTBLU/RED
Blower motor controller
A/C
DiodeAutounit
Blower
motor
15A RADIO
Evaporator
temperature
sensor Air flow control
actuator
Temperature
control actuator
40
635
71 2
G47
G051
2 1
5V5V
5V5V 12V
12V
12V
J/B
J/B
G326
1 2
5
3
30A HTR
FAN
4
10A
38IG2
SIG
Blowermotorrelay
E39
7
G349
G15
J/C
912
A
A
BLK
11
A
BLKBLK
BLU
J/C
B BG16
B
G16
J/C
DDDD
G17
J/C
B
B
Individual circuit fuse box (No.1)
G502
1
PNK/BLK
Inside air
temperature
sensor
5V
I7RS0B910946-02