Subaru 2001 IMPREZA User manual

FUJI HEAVY INDUSTRIES LTD. G1830GE6
2001 IMPREZA SERVICE MANUAL QUICK REFERENCE INDEX
BODY SECTION
This service manual has been prepared
to provide SUBARU service personnel
with the necessary information and data
for the correct maintenance and repair
of SUBARU vehicles.
This manual includes the procedures
for maintenance, disassembling, reas-
sembling, inspection and adjustment of
components and diagnostics for guid-
ance of experienced mechanics.
Please peruse and utilize this manual
fully to ensure complete repair work for
satisfying our customers by keeping
their vehicle in optimum condition.
When replacement of parts during
repair work is needed, be sure to use
SUBARU genuine parts.
All information, illustration and specifi-
cations contained in this manual are
based on the latest product information
available at the time of publication
approval.
HVAC SYSTEM
(HEATER, VENTILATOR AND A/C) AC
HVAC SYSTEM (AUTO A/C)
(DIAGNOSTICS) AC
AIRBAG SYSTEM AB
AIRBAG SYSTEM (DIAGNOSTICS) AB
SEAT BELT SYSTEM SB
LIGHTING SYSTEM LI
WIPER AND WASHER SYSTEMS WW
ENTERTAINMENT ET
COMMUNICATION SYSTEM COM
GLASS/WINDOWS/MIRRORS GW
BODY STRUCTURE BS
INSTRUMENTATION/DRIVER INFO IDI
SEATS SE
SECURITY AND LOCKS SL
IMMOBILIZER (DIAGNOSTICS) IM
SUNROOF/T-TOP/CONVERTIBLE TOP
(SUNROOF) SR
EXTERIOR/INTERIOR TRIM EI

2001 IMPREZA SERVICE MANUAL QUICK REFERENCE INDEX
BODY SECTION
G1830GE6
EXTERIOR BODY PANELS EB
CRUISE CONTROL SYSTEM CC
CRUISE CONTROL SYSTEM
(DIAGNOSTICS) CC

HVAC SYSTEM (AUTO A/C)
(DIAGNOSTICS) AC
Page
1. Basic Diagnostic Procedure........................................................................2
2. General Description ....................................................................................3
3. Electrical Components Location..................................................................6
4. A/C Control Module I/O Signal....................................................................8
5. Diagnostics Chart for Diagnosis System...................................................18
6. Diagnostics for A/C System Failure ..........................................................22
7. Diagnostic Procedure for Actuators ..........................................................30
8. Diagnostic Procedure for Sensors ............................................................36
9. Symptom Related Diagnostic....................................................................46

AC-2
HVAC SYSTEM (AUTO A/C) (DIAGNOSTICS)
BASIC DIAGNOSTIC PROCEDURE
1. Basic Diagnostic Procedure
A: PROCEDURE
Step Check Yes No
1 START INSPECTIONS.
1)Perform pre-inspection.
2)Perform self-diagnosis. <Ref. to AC-18,
SELF-DIAGNOSIS MODE, Diagnostics Chart
for Diagnosis System.>
Dose self-diagnosis operate? Go to step 2. <Ref. to AC-22, A/
C AND/OR SELF-
DIAGNOSIS SYS-
TEMS DO NOT
OPERATE, Diag-
nostics for A/C
System Failure.>
2 CONFIRM MALFUNCTION PART.
Confirm malfunction part with self-diagnosis. Can the malfunction part be confirmed? Repair the mal- function part
according to each
diagnostics chart.
Go to step 3.
3 CHECK COMPARTMENT TEMPERATURE.
1)Turn A/C switch ON.
2)Set temperature at maximum cold position.
3)Check compartment temperature changes.
Is the compartment tempera-
ture changed? Go to step 4. <Ref. to AC-26, COMPARTMENT
TEMPERATURE
IS NOT
CHANGED OR A/
C SYSTEM DOES
NOT RESPOND
QUICKLY, Diag-
nostics for A/C
System Failure.>
4 CHECK A/C SYSTEM RESPONSE.
Change the temperature setting, and check
response of A/C system.
Dose A/C system respond
quickly? A/C system is OK. <Ref. to AC-26, COMPARTMENT
TEMPERATURE
IS NOT
CHANGED OR A/
C SYSTEM DOES
NOT RESPOND
QUICKLY, Diag-
nostics for A/C
System Failure.>

AC-3
HVAC SYSTEM (AUTO A/C) (DIAGNOSTICS)
GENERAL DESCRIPTION
2. General Description
A: CAUTION
1) Never connect the battery in reverse polarity.
•The Auto A/C control module will be destroyed
instantly.
2) Do not disconnect thebattery terminals while the
engine is running.
•A large counter electro motive force will be gen-
erated in the alternator, and this voltage may dam-
age electronic parts such as A/C control module.
3) Before disconnecting the connectors of each
sensor and the A/C control module, be sure to turn
off the ignition switch.
•Otherwise, the Auto A/C control module may be
damaged.
4) Every Auto A/C-related part is a precision part.
Do not drop them.
5) Airbag system wiring harness is routed near the
A/C control panel (A/C control module)and junction
box.
CAUTION:
•All Airbag system wiring harness and con-
nectors are colored yellow. Do not use electri-
cal test equipment on these circuits.
•Be careful not to damage Airbag system wir-
ing harness when servicing the A/C control
panel (A/C control module) and junction box.
B: INSPECTION
Before performing diagnosis, check the following
items which might affect engine problems.
1. BATTERY
1) Measure battery voltage and specific gravity of
electrolyte.
Standard voltage: 12 V
Specific gravity: Above 1.260
2) Check the condition of the fuses for A/C, heater
and other fuses.
3) Check the condition of the harnesses and har-
ness connectors connection.
2. ASPIRATOR HOSE
1) Make sure that the aspirator hose is securely
connected to the heater unit by inserting a hand
from the driver's compartment and secure as nec-
essary.
2) Turn ignition switch to ON and push “A/C”
switch.
3) Turn temperature control dail to maximum hot
position.
4) Turn air flow control dial to “DEF”position.
5) Turn fan speed control dial to 4TH position.
6) Firmly hold a thin thread (b) in front of the in-ve-
hicle sensor suction port (a) forthe auto A/C control
unit and check that the thread moves towards the
port indicating that air is being sucked into the port.
NOTE:
•Ensure the thread does not get sucked into the
port.
•Hold the thread approximately 5 mm (0.02 in)
away from the port when the suction force is not
very strong.
HV0027
20
25
30

AC-4
HVAC SYSTEM (AUTO A/C) (DIAGNOSTICS)
GENERAL DESCRIPTION
7) If the thread does not move at all, remove the
auto A/C control unit <Ref. to AC-26, REMOVAL,
Control Unit.> and check for improper connection
of the aspirator hose (a) and auto A/C control unit
and secure as necessary.
3. REFRIGERANT LINE
Check contact for refrigerant line (A).
4. CONTROL LINKAGE
1) Check state of mode door linkage.
2) Check state of air mix door linkage.
3) Check state of intake door linkage.
(a)
HV0028
(A)
HV0029

AC-5
HVAC SYSTEM (AUTO A/C) (DIAGNOSTICS)
GENERAL DESCRIPTION
5. CONTROL SWITCHES
Start and warm up engine completely.
1) Inspection using switches.
2) Compressor operation inspection
3) Illumination control inspection
No. Point to check Switch operation Judgement standard
1 Fan speed control dial OFF position A/C switch LED goes out.
•Fan speed: OFF
•Compressor: OFF
Fan speed control dial 1st → 2nd →3rd →4th Fan speed changes 1st → 2nd →3rd →4th
2Fan speed control dial and temperature con-
trol dial
A. Fan speed control dial auto position.
B. Temperature control dial maximum cold posi-
tion
•Outlet air: Cool
•Fan speed: 4th
•Compressor: ON
C. Turn temperature control dial from maximum
cold position to maximum hot position gradually.
•Outlet air: Cool →Hot
•Fan speed: AUTO
•Compressor: ON
D. Temperature control dial maximum hot position •Outlet air: Hot •Fan speed: 4th
•Compressor: ON
3 Air flow control dial Air flow control dial VENT →BI-LEVEL →HEAT
→DEF/HEAT →DEF Air flow outlet changes from VENT →BI-
LEVEL →HEAT →DEF/HEAT →DEF.
4FRESH/RECIRC
switch FRESH/RECIRC switch ON Changes from RECIRC →FRESH, or FRESH
→RECIRC.
No. Point to check Switch operation Judgement standard
1 Compressor A. A/C switch ON
B. Fan speed control dial 1st-4th Compressor: ON
No. Point to check Switch operation Judgement standard
1 Illumination Lighting switch ON Illumination light illuminates.

AC-6
HVAC SYSTEM (AUTO A/C) (DIAGNOSTICS)
ELECTRICAL COMPONENTS LOCATION
3. Electrical Components Location
A: LOCATION
1. ENGINE COMPARTMENT
(2)
(1)
(3)
(2)
(4)
(1)
(3)
HV0030
(1) A/C compressor (3) Pressure switch
(2) A/C relay (4) Ambient sensor

AC-7
HVAC SYSTEM (AUTO A/C) (DIAGNOSTICS)
ELECTRICAL COMPONENTS LOCATION
2. PASSENGER COMPARTMENT
(7)
(7)
(2)
(3)
(4) (6)
(5)
(1)
(6)
(5)
(4)
(3) (2)
(1)
(8)
HV0031
(1) Evaporator sensor (4) Intake door actuator (7) Sunload sensor
(2) Blower motor (5) Air mix door actuator (8) In-vehicle sensor
(built-in Auto A/C control module)
(3) Blower motor resistor (6) Mode door actuator

AC-8
HVAC SYSTEM (AUTO A/C) (DIAGNOSTICS)
A/C CONTROL MODULE I/O SIGNAL
4. A/C Control Module I/O Signal
A: ELECTRICAL SPECIFICATION
HV0032
10
20 19 18 17 16 15 14 13 12 11
987654 321
10
16 15 14 13 12 11 9
87654 321
To B283 : b To B282 : a
Content Connector &
Terminal No. Signal (V)
Battery power supply (Memory
back-up) b1—b12 Battery voltage, 13 —14 (engine running)
IGN power supply a8—b12 Battery voltage (ignition switch ON),
13 —14 (engine running)
ACC power supply
(OFF: ignition in START or diag-
nosis system reset) b2—b12 Battery voltage, 0 (engine cranking), Battery voltage (during engine starts)
A/C control module ground circuit b12—body 0 (ignition switch ON) —circuit constantly grounded
Sensor ground circuit b17—body 0 (ignition switch ON) —continuity exists
Ambient sensor b9—b17 Approx. 3.3 (disconnect connector, and ignition switch ON)Evaporator sensor b7—b17
Thermometer b15—b12
Sunload sensor b16—b17 Approx. 4.2 (disconnect connector, and ignition switch ON)
Air mix door actuator b5—b1 Battery voltage (ignition switch ON)
Air mix door actuator P.B.R. a4—b17 Approx. 5.5
Mode door actuator b6—b17 Battery voltage (ignition switch ON)
Mode door actuator P.B.R. a12—b17 Approx. 5.5
Intake door FRS voltage a15—a7 Battery voltage (CIRC switch OFF)
Intake door CIRC voltage a7—a15 Battery voltage (CIRC switch ON)
Blower fan relay b14—body Battery voltage (ignition switch ON)
A/C relay b3—b12 0 (ignition and A/C switches ON)
Battery voltage (A/C switch OFF)
Illumination control signal b10—b20 Battery voltage (ignition and lighting switches ON)
Rear defogger a13—b12 0 (IGN ON, R Def SW ON)

AC-9
HVAC SYSTEM (AUTO A/C) (DIAGNOSTICS)
A/C CONTROL MODULE I/O SIGNAL
B: SCHEMATIC
1. AIR CONDITIONER AUTO A/C LHD MODEL
GL46-20A
A/C(ALH)-01 A/C(ALH)-01
GOr
RW
GOr
10
BrY
11
Br
12
L
9
F31
FB-19
F/B FUSE NO. 17
(IG)
FB-20
F/B FUSE NO. 17
(IG)
FB-34
F/B FUSE NO. 1 (B)
F/B FUSE NO. 2 (B)
TO POWER SUPPLY ROUTING
Br
AIR
CONDITIONING
RELAY
RW 2
GOr 1
GR 3
BR 4
B50
B87
GOr
F45 B62
LY
A6
Br
D27
B282
A: B: B283 AUTO A/C
CONTROL MODULE
LYB4
BrY
B3
GOrA8
GR
B14
BYB11
RLA16
BLOWER MOTOR
RELAY
GR
A9
MAGNET
CLUTCH
COMPRESSOR
THERMAL
PROTECTOR
BrY16BrY
Br 15
A:
D:
ENGINE
CONTROL
MODULE
(TURBO
ENGINE
MODEL)
ENGINE
CONTROL
MODULE
(NON-TURBO
ENGINE
MODEL)
B134
B137
LY
B27
GR
C30
BrA17
A:
B:
C:
B134
B135
B136 B275
FAN CONTROL
AMP
BY 2
1RL
4
B
BR
BLOWER MOTOR
1
BY 2
REF.TO GND-03
L
3
Y2
GOr1
F24
B275
(GRAY)(GRAY)
2
1
34
F79
1 2
F24
123
B50
2
1
34
(GRAY)
123456789
10
11 12 13 14 15 16 17 18 19 20
B282 (GRAY)
12345678
9
10 11 12 13 14 15 16
A: B283 B:
B135
B:
B134
A:
1234
10 11 12
19 20 21
13
56
14 15
7
89
16 17 18 22
RELAY HOLDER (BLACK)
F31
1 2
3 4
5 6
7
8
9
10
11 12
13 14
15
16
17
18
19 20
21 22
23
24
25
26
27 28
29
30
D: B137
12 789
56
34
10 11 12 19 20 21
29 30 31
13 14 15 16 17
27 28
18
22 23 24 25 26
BrY
2
1
F79
PRESSURE SWITCH
Y
TB
NA
NA
TB
NA
TB
:TURBO ENGINE MODEL
: NON-TURBO ENGINE MODEL
TB
NA
TB
NA
TB
TB
NA NA
NA
B87
1
2
1
2
F45
12345 6789 10 11
12 13 14 15 16 17 18 19 20 21 22 23 24
A: B134
1 2 3 4 5 6 7 8
9 10 11 12 13 14 15 16 17 18 19 20 21 22 23
24 25 26 27 28 29 30 31 32 33 34 35
5467
8
21
9
3
10
22 23
11 12 13 14 15
24 25 26 27
16 17 18
28 29
19 20
21 30
B136
C:
567
8
21
9
4
3
10
2422 23 25
11 12 13 14 15
26 27 28
16 17 18 19
20 21
B
:
:
:
:
:

AC-10
HVAC SYSTEM (AUTO A/C) (DIAGNOSTICS)
A/C CONTROL MODULE I/O SIGNAL
GL46-20B
A/C(ALH)-02 A/C(ALH)-02
B282
A: B: B283
YG
AUTO A/C CONTROL MODULE
B2
A13 A14 RL
R
(GRAY)
123456789
10
11 12 13 14 15 16 17 18 19 20
B282 (GRAY)
12345678
9
10 11 12 13 14 15 16
A: B283
B:
TO POWER SUPPLY ROUTING
LR
FB-8
M/B FUSE NO. 2
(B)
LR
FB-9
F/B FUSE NO. 2
(B)
FB-17
F/B FUSE NO. 18
(IG)
YG
LR
B1
FB-27
F/B FUSE NO. 9
(ACC)
GB
GY
B19
REF.TO R/DEF(L)-01
B10 B20 B
VREF.TO ILM(L)-01
GE
(GREEN)
(BROWN)
(BROWN) C: B56
12 78956
34
10 11 12
19 20 21
13 14 15 16 17 18
22 23 24
GY C17
B56
C:
TRANSMISSION
CONTROL
MODULE (AT)
BRBR 16
B22
E3
BRBR 16
F60
E3
BRBR D2
B209
F76
B17
GB 3
BR 2
GY 1
MT
TB
NA
AT
TB
NA
VEHICLE SPEED
SENSOR (MT)
SMJ
B17
2
1
34
B17
12 3
NA TB
F60
B22
1234
5678
9
10 11 12
13 14 15 16
:TURBO ENGINE MODEL
: NON-TURBO ENGINE MODEL
TB
NA
TB
NA
::
BR

AC-11
HVAC SYSTEM (AUTO A/C) (DIAGNOSTICS)
A/C CONTROL MODULE I/O SIGNAL
GL46-20C
A/C(ALH)-03 A/C(ALH)-03
(GRAY) (BLACK)
123456789
10
11 12 13 14 15 16 17 18 19 20
B282 (GRAY)
12345678
9
10 11 12 13 14 15 16
A:A: B283 B:
B282
A: B: B283 AUTO A/C CONTROL MODULE
BP B9
RB7
GR B16
B17
A11
BP BP
BL BL
4
BL
2
BP
1
F78
AMBIENT SENSOR SUNLOAD
SENSOR i11
B: COMBINATION
METER
BL
1
2
i51
YB
B12
BP
B11
BL
B8
F45
B62
i1
B36
1 2
F78
B256
i51
(BLACK)
YB 12 YB BP 22 BP
BL 21 BL
GR 2GR
GR
EVAPORATION
THERMO SWITCH
BL
1
2
B256
R
BL
YB
5
F45
12345 67 8 9 10 11
12 13 14 15 16 17 18 19 20 21 22 23 24
B36
1234567 8 9 10 11
12 13 14 15 16 17 18 19 20 21 22 23 24
(GREEN)B: i11
1 2 3 4 5 6 7 8 9 10 11 12 13 14
15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30
-COM
LCD(OUTTEMP)
I/FI/F

AC-12
HVAC SYSTEM (AUTO A/C) (DIAGNOSTICS)
A/C CONTROL MODULE I/O SIGNAL
GL46-20D
A/C(ALH)-04 A/C(ALH)-04
B15
LgR A7
GY B5
BL A15
RY
L
A12
A4
LW B6
AUTO A/C CONTROL MODULE
1 2
B91
FRESH/RECIRC
ACTUATOR
A: B282 B: B283
BL
LgR
B293
B77
BB12
REF.TO GND-01•02
WGWG
3
E8
THERMOMETER
WGWG 10
B21
E2
WGWG 15
F61
E2
WGWG J1
B209
F76
TB
NA
TB
NA
SMJ
B77
MODE ACTUATOR
LW 1
3RY
2
B
B293
AIR MIX
ACTUATOR
1GY
L3
B
2
(GRAY)
123456789
10
11 12 13 14 15 16 17 18 19 20
B282 (GRAY)
12345678
9
10 11 12 13 14 15 16
A: B283 (BLACK)
F61
B:
1
2
3
(BLACK)
(LIGHT GRAY) B91
1
3456
2
12
3
B21
12 34
56
78
9
10 11 12
13 14 15 16
17 18 19 20
E8
B
(LIGHT GRAY)

AC-13
HVAC SYSTEM (AUTO A/C) (DIAGNOSTICS)
A/C CONTROL MODULE I/O SIGNAL
2. AIR CONDITIONER AUTO A/C RHD MODEL
GR46-20A
A/C(ARH)-01 A/C(ARH)-01
GOr
RW
GOr
10
BrY12
Br11
L
9
F31
FB-19
F/B FUSE NO. 17
(IG)
FB-20
F/B FUSE NO. 17
(IG)
FB-34
F/B FUSE NO. 1 (B)
F/B FUSE NO. 2 (B)
TO POWER SUPPLY ROUTING
BrR
AIR
CONDITIONING
RELAY
RW 2
GOr 1
GR 3
BR 4
B50
B87
GOr
F45 B62
PB
A6
BrR
D27
B282
A: B: B283 AUTO A/C
CONTROL MODULE
PBB4
BrY
B3
GOrA8
GR
B14
BWB11
RLA16
BLOWER MOTOR
RELAY
GR
A9
MAGNET
CLUTCH
COMPRESSOR
THERMAL
PROTECTOR
BrY
6BrY
Br 16
A:
D:
ENGINE
CONTROL
MODULE
(TURBO
ENGINE
MODEL)
ENGINE
CONTROL
MODULE
(NON-TURBO
ENGINE
MODEL)
B134
B137
PB
B27
GRC30
BrRA17
A:
B:
C:
B134
B135
B136 B275
FAN CONTROL
AMP
BW 2
1RL
4
B
BR
BLOWER MOTOR
1
BW 2
B
REF.TO GND-03
L
3
BrY1
Lg2
F24
B275
(GRAY)(GRAY)
2
1
34
F79
12
F24
123
B50
2
1
34
(GRAY)
123456789
10
11 12 13 14 15 16 17 18 19 20
B282 (GRAY)
12345678
9
10 11 12 13 14 15 16
A: B283 B:
B135
B:
B134
A:
1234
10 11 12
19 20 21
13
56
14 15
7
89
16 17 18 22
RELAY HOLDER (BLACK)
F31
1 2
3 4
5 6
7
8
9
10
11 12
13 14
15
16
17
18
19 20
21 22
23
24
25
26
27 28
29
30
D: B137
12 78956 34
10 11 12 19 20 21
29 30 31
13 14 15 16 17
27 28 18 22 23 24 25 26
GOr
2
1
F79
PRESSURE SWITCH
Lg
TB
NA
NA
TB
NA
TB
:TURBO ENGINE MODEL
: NON-TURBO ENGINE MODEL
TB
NA
TB
NA
TB
TB
NA NA
NA
B87
1
2
1
2
A: B134
1 2 3 4 5 6 7 8
9 10 11 12 13 14 15 16 17 18 19 20 21 22 23
24 25 26 27 28 29 30 31 32 33 34 35
5467
821 93
10
22 23
11 12 13 14 15
24 25 26 27
16 17 18
28 29
19 20
21 30
B136
C:
567
821 94
3
10 2422 23 25 11 12 13 14 15 26 27 28 16 17 18 19
20 21
(BLACK)
F45
15 16 17 18
1 2 3 4 5 6 7 8
9 10 11 12 13 14
:: :
::

AC-14
HVAC SYSTEM (AUTO A/C) (DIAGNOSTICS)
A/C CONTROL MODULE I/O SIGNAL
GR46-20B
A/C(ARH)-02 A/C(ARH)-02
B56
C:
B282
A: B: B283
YG
AUTO A/C CONTROL MODULE
B2
A13 A14 RL
R
(GRAY)
123456789
10
11 12 13 14 15 16 17 18 19 20
B282 (GRAY)
12345678
9
10 11 12 13 14 15 16
A: B283
B:
TO POWER SUPPLY ROUTING
LR
MB-10
M/B FUSE NO. 2
(B)
FB-17
F/B FUSE NO. 18
(IG)
YG
LR
B1
FB-27
F/B FUSE NO. 9
(ACC)
GB
GY
B19
REF.TO R/DEF(R)-01
B10
B20
VREF.TO ILM(ROI)-01
ILM(RWI)-01
GE
(GREEN)
(BROWN) C: B56
12 78956 34
10 11 12
19 20 21 13 14 15 16 17 18
22 23 24
GY C17
TRANSMISSION
CONTROL
MODULE (AT)
GWBR
BR 16
B22
E3
B17
GB 3
GW 2
GY 1
MT
AT
VEHICLE SPEED
SENSOR (MT)
B17
2
1
34
B17
12 3
NA TB B22
1234
5678
9
10 11 12
13 14 15 16
:TURBO ENGINE MODEL
: NON-TURBO ENGINE MODEL
TB
NA
:
: WITHOUT ILLUMINATION CONTROL
MODEL
WITH ILLUMINATION CONTROL
MODEL : YL
: B
1
*
1
*
::

AC-15
HVAC SYSTEM (AUTO A/C) (DIAGNOSTICS)
A/C CONTROL MODULE I/O SIGNAL
GR46-20C
A/C(ARH)-03 A/C(ARH)-03
(GRAY)
123456789
10
11 12 13 14 15 16 17 18 19 20
B282 (GRAY)
12345678
9
10 11 12 13 14 15 16
A:A: B283 B:
B282
A: B: B283 AUTO A/C CONTROL MODULE
Or B9
RB7
GR B16
B17 A11
Or Or
YB YB
14
YB
1
Or
2
F78
AMBIENT SENSOR SUNLOAD
SENSOR
YB
1
2
i51
F45
B62
i2
B37
1 2
F78
B256
i51
(BLACK)
W23 W
Or 24 Or
YB 26 YB
GR 25 GR
GR
EVAPORATION
THERMO SWITCH
YB
1
2
B256
R
YB
W
13
(GREEN)B: i11
1 2 3 4 5 6 7 8 9 10 11 12 13 14
15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30
(BLACK)
F45
15 16 17 18
1234 5 6 7 8
9 10 11 12 13 14
21
9
32
i2
1234 56
10 11 12 13 14 15
7
16
23 30
19 20
22 26 27 28 29
8
17
24 31
18
25
i11
B: COMBINATION
METER
W
B12
Or
B11
YB
B8
-COM
LCD(OUTTEMP)
I/FI/F

AC-16
HVAC SYSTEM (AUTO A/C) (DIAGNOSTICS)
A/C CONTROL MODULE I/O SIGNAL
GR46-20D
A/C(ARH)-04 A/C(ARH)-04
B15
LgR A7
GY B5
BL A15
RY
L
A12
A4
LW
B
B6
AUTO A/C CONTROL MODULE
1 2
B91
FRESH/RECIRC
ACTUATOR
A: B282 B: B283
BL
LgR
B293
B77
BB12
REF.TO GND-01•02
WGWG
3
E8
THERMOMETER
WGWG 10
B21
E2
WGWG 15
B21
E2
TB
NA
TB
NA
B77
MODE ACTUATOR
LW 1
3RY
2
B
B293
AIR MIX
ACTUATOR
1GY
L3
B
2
(GRAY)
123456789
10
11 12 13 14 15 16 17 18 19 20
B282 (GRAY)
12345678
9
10 11 12 13 14 15 16
A: B283 B:
1
2
3
(BLACK)
B91
1
3456
2
12
3
B21
12 34
56
78
9
10 11 12
13 14 15 16
17 18 19 20
E8 (LIGHT GRAY)
TB
NA
:TURBO ENGINE MODEL
: NON-TURBO ENGIN MODEL
TB
NA
TB
NA
: (BLACK)
: (LIGHT GRAY)

AC-17
HVAC SYSTEM (AUTO A/C) (DIAGNOSTICS)
A/C CONTROL MODULE I/O SIGNAL

AC-18
HVAC SYSTEM (AUTO A/C) (DIAGNOSTICS)
DIAGNOSTICS CHART FOR DIAGNOSIS SYSTEM
5. Diagnostics Chart for Diagnosis System
A: SELF-DIAGNOSIS MODE
(1)
(6)
(5)
(4)(3)(2)
HV0033
(1) Air flow control dial (3) A/C switch (5) Temperature control dial
(2) Rear window defogger switch (4) FRESH/RECIRC switch (6) Fan speed control dial
Step Check Yes No
1 SELECT CONTROL PANEL TO SELF-DIAG-
NOSIS MODE.
1)Turn fan speed control dial to OFF position.
2)Start engine and press rear window defogger
switch for at least 5 seconds. The rear window
defogger switch must be pressed within 10
seconds after starting engine.
Does the self-diagnosis mode
operate? Go to step 2. <Ref. to AC-22, A/ C AND/OR SELF-
DIAGNOSIS SYS-
TEMS DO NOT
OPERATE, Diag-
nostics for A/C
System Failure.>
2 CHECK LED ILLUMINATION.
Make sure that all switch LED illuminate (RHD
model) or blink (LHD model) on control panel.
Do all LED illuminate or blink? Go to step 3. Check the switch
LED.
3 CHECK SENSORS MALFUNCTION.
1)Turn fan speed control dial to AUTO position.
2)If system has the trouble for each sensor,
rear window defogger switch LED is turned off.
3)If system has no trouble, rear window defog-
ger switch LED is illuminated.
Does rear window defogger
switch LED illuminate? Go to step 5. Go to step 4.
4 CONFIRM MALFUNCTIONING SENSOR.
1)Turn fan speed control dial to 1st position.
2)Turn air flow control dial to each mode posi-
tion, check each switch LED illumination
according to sensor check table. <Ref. to AC-
20, SENSOR CHECK TABLE, SELF-DIAGNO-
SIS MODE, Diagnostics Chart for Diagnosis
System.>
Do FRESH/RECIRC and A/C
switch LED illuminate when
turning the dial to each mode
position?
Go to step 5. Repair malfunc-
tioning sensor.
<Ref. to AC-36,
Diagnostic Proce-
dure for Sensors.>