light ACURA CSX 2006 Service Repair Manual


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20-170Exterior Trim
Emblem/Sticker Replacement
FRONT ’’A’’ EMBLEM
REAR ’’A’’ EMBLEM
CSX EMBLEM
FRONT GRILLE BASE REAR ’’A’’ EMBLEM
ADHESIVE
TAPE
TRUNK LIDCLIP
CSX EMBLEM
Edge of the trunk lid
20 (0.79) ACURA EMBLEM
SCREWS
33
(1.3) 24
(0.94)
55
(2.17)
Edge of the inner taillight
Edge of the trunk lid
ACURA EMBLEM TYPE-S EMBLEM
(For some models)
Unit: mm (in.)
Adhesive tape: Thickness 0.8 mm (0.03 in.)
FRONT ’’A’’ EMBLEM
Edge of the trunk lidEdge of the inner taillight
104.5
(4.12)
21 (0.83)
17 (0.67)
22 (0.87)
CSX EMBLEM
TYPE-S EMBLEM
(For some models)
NOTE: When removing the emblems, take care not to scratch the body.1. To remove the front ‘‘A’’ emblem, remove the front grille (see page 20-160).
2. Clean the body surface with a shop towel dampened in isopropyl alcohol. After cleaning, keep oil, grease, and water from getting on the surface.
3. Apply the emblem where shown.
4. After installing the front ‘‘A’’ emblem, reinstall the front grille.
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HVAC (Heating, Ventilation, andAir Conditioning)
Climate Control
HVAC (Heating, Ventilation, and Air Conditioning)
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Special Tools . 21-2
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Component Location Index . 21-3
A/C Service
Tips and Precautions . 21-6
A/C System Inspection . 21-6
A/C Refrigerant Oil Replacement . 21-7
A/C Line Replacement . 21-8
General Troubleshooting Information . 21-9
DTC Troubleshooting Index . 21-15
Symptom Troubleshooting Index . 21-16
System Description . 21-19
Circuit Diagram . 21-26
DTC Troubleshooting . 21-28
Climate Control Power and Ground Circuit
Troubleshooting . 21-53
Navigation Communication Line Circuit
Troubleshooting . 21-54
Radiator and A/C Condenser Fan Low Speed Circuit
Troubleshooting . 21-56
A/C Condenser Fan High Speed Circuit Troubleshooting . 21-60
A/C Compressor Clutch Circuit Troubleshooting . 21-62
A/C Signal Circuit Troubleshooting . 21-64
In-car Temperature Sensor Test . 21-67
In-car Temperature Sensor Replacement . 21-67
Outside Air Temperature Sensor Test . 21-68
Outside Air Temperature Sensor Replacement . 21-68
Sunlight Sensor Test . 21-69
Sunlight Sensor Replacement . 21-69
Evaporator Temperature Sensor Test . 21-70 ............
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Power Transistor Test . 21-71
Air Mix Control Motor Test . 21-72
Air Mix Control Motor
Replacement . 21-72
Mode Control Motor Test . 21-73
Mode Control Motor Replacement . 21-73
Recirculation Control Motor Test . 21-74
Recirculation Control Motor Replacement . 21-74
Climate Control Unit Removal/Installation . 21-75
Dust and Pollen Filter Replacement . 21-75
Blower Unit Removal/Installation . 21-76
Blower Unit Component Replacement . 21-77
Evaporator Core Replacement . 21-78
Expansion Valve Replacement . 21-80
Heater Unit/Core Replacement . 21-81
A/C Compressor Replacement . 21-83
A/C Compressor Clutch Check . 21-85
A/C Compressor Clutch Overhaul . 21-86
A/C Compressor Thermal Protector
Replacement . 21-87
A/C Compressor Relief Valve Replacement . 21-87
A/C Condenser Replacement . 21-88
Receiver/Dryer Desiccant Replacement . 21-89
Refrigerant Recovery . 21-90
System Evacuation . 21-91
System Charging . 21-92
Refrigerant Leak Check . 21-93
A/C System Noise Check . 21-97
A/C System Test . 21-99
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ÃŽ
21-5
EVAPORATOR CORE
(Located in the heater unit)
EVAPORATOR TEMPERATURE
SENSOR HEATER UNIT/CORE
RECIRCULATION
CONTROL MOTOR
POWER TRANSISTOR
AIR MIX CONTROL MOTOR DUST AND POLLEN FILTER
CLIMATE CONTROL UNIT
SUNLIGHT SENSOR
IN-CAR TEMPERATURE SENSOR MODE CONTROL MOTORBLOWER UNIT
EXPANSION VALVE
Replacement, page 21-78
Test, page 21-70 Replacement, page 21-81
Test, page 21-74
Replacement,page 21-74
Test, page 21-71
Test, page 21-72
Replacement, page 21-72 Replacement,
page 21-75
Removal/Installation, page 21-75
Test, page 21-69
Replacement, page 21-69
Test, page 21-67
Replacement, page 21-67 Test, page 21-73
Replacement, page 21-73Removal/Installation,
page 21-76
Component Replacement, page 21-77
Replacement, page 21-80
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How to Use the Self-diagnostic Function without the HDS
Except Type S model
Type S model
Canceling the Self-diagnostic Function
21-11
AUTO BUTTON AUTO INDICATOR MODE BUTTON
TEMPERATURE INDICATOR
RECIRCULATION BUTTON A/C BUTTON
MODE BUTTON TEMPERATURE INDICATOR
RECIRCULATION BUTTON
A/C BUTTON AUTO BUTTON
AUTO INDICATOR
The climate control unit has a self-diagnostic function. To run the self-diagnostic function, do the following:
1. Make sure the ignition switch is in LOCK (0).
2. Press and hold the AUTO and RECIRCULATION buttons, turn the ignition switch to ON (II), then release the AUTO and RECIRCULATION buttons.
3. All LCD segments come on for 2 seconds, then self-diagnostic function begins.
NOTE: The blower motor will run at various speeds when in the self-diagnostic mode, regardless of what the
panel is displaying. If there is any problem in the system, the temperature indicator will light up the segment (A through P) and AUTO indicator corresponding to the error. The temperature indicator will then alternate every second between
displaying ‘‘88’’ (all segments lit) and the error code segment (A through P) and AUTO indicator. To determine
the meaning of the DTC, refer to checking for DTCs.
 If there are no problems detected, the segments will not illuminate, and the system will appear to be turned off.
4. Turn the ignition switch to LOCK (0) to cancel the self-diagnostic function. After completing repair work, run the self-diagnostic function again to make sure that there are no other DTCs.
(cont’d)
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Checking for DTCs
DTC
(Temperature Indicator
Segment and AUTO
Indicator) Detection Item
21-12Climate Control
General Troubleshooting Information (cont’d)
AUTO INDICATOR
NM
TEMPERATURE INDICATOR
EG C
D
H
P
K
L
F
B A
J
The temperature display indicates single or multiple DTCs. If indicator segments A, C, E, G, J, M, and AUTO are on at
the same time, there may be an open in the common ground wire. If no DTCs are present, the indicator remains blank.
A An open in the in-car temperature sensor circuit (see page 21-31)B A short in the in-car temperature sensor circuit (see page 21-32)
C An open in the outside air temperature sensor circuit (see page 21-33)
D A short in the outside air temperature sensor circuit (see page 21-34) E An open in the sunlight sensor circuit (see page 21-35)F A short in the sunlight sensor circuit (see page 21-36)
G An open in the evaporator temperature sensor circuit (see page 21-37) H A short in the evaporator temperature sensor circuit (see page 21-39) J An open in the air mix control motor circuit (see page 21-40)
K A short in the air mix control motor circuit (see page 21-41) L A problem in the air mix control linkage, door, or motor (see page 21-42)
M An open or short in the mode control motor circuit (see page 21-44) N A problem in the mode control linkage, doors, or motor (see page 21-46) P A problem in the blower motor circuit (see page 21-47)
A and AUTO An open in the recirculation control motor circuit (see page 21-52) B and AUTO A problem in the recirculation control linkage, door, or motor (see page 21-51)
C and AUTO Climate control unit internal error (see page 21-28)
D and AUTO Climate control unit lost communication with gauge control module (TACH) (ILLUMI message) (see page 21-28)
E and AUTO A short in the recirculation control motor circuit (see page 21-29) F and AUTO Climate control unit lost communication with gauge control module (TACH) (ECT message) (see page 21-28)
J and AUTO Climate control unit lost communication with gauge control module (TACH) (VSP message) (see page 21-28)
K and AUTO Communication bus line error (see page 22-106) L and AUTO Climate control unit lost communication with gauge control module (TACH) (NE message) (see page 21-28)
08/08/21 14:40:58 61SNR030_210_0013
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Displaying Sensor Inputs at the Climate Control Unit
Check these items before using the sensor input display mode
To run the sensor input display mode, follow these steps
21-13
The climate control unit has a mode that displays the sensor inputs it receives. This mode shows you what data the
climate control unit is receiving from each of the sensors, one at a time, and it can help you determine if a sensor is
faulty.1. Turn the ignition switch to ON (II), and check the recirculation door function; press the recirculation button to switch from FRESH to RECIRC. The air volume and sound should change slightly.
2. Set the temperature control knob to the desired test temperature. When selecting the test temperature, note these items:
 ‘‘Lo’’ temperature setting will default to MAX COOL, VENT, and RECIRC.
 ‘‘Hi’’ temperature setting will default to MAX HOT, FLOOR, and FRESH.
 19 through 31 °C settings will use the automatic climate control logic.
3. Turn the ignition switch to LOCK (0).
1. Turn the ignition switch to LOCK (0).
2. Press and hold both the AUTO and MODE buttons, then start the engine.
3. After the engine starts, release both buttons. The display panel will flash the sensor number and then the value for that sensor. Record the value displayed.
4. To advance to the next sensor, press the A/C button. Sensor Item Displayed Value1 Mode Positioning BIT
2 In-car Temperature °C
3 Outside Air Temperature °C
4 Solar Radiation Sensor Value: Dark = 00, Flashlight = 04, Cloudy = 10, Sunny = 65 10 kcal/m ·h
5 Evaporator Outlet Air Temperature °C
6 Air Mix Opening (Low value indicates cooler air distribution, higher value indicates warmer air distribution) % of opening
7 Recirculation Opening % of opening
8 Vehicle Speed (Vehicle must be driven to display speed) km/h
9 Engine Coolant Temperature °C
A Vent Temperature Air Out (TAO) °C
NOTE:  The sensor values will be displayed in degrees Celsius (°C) or an alphanumeric code. Use the chart to convert the value to degrees Fahrenheit (°F).
 If the sensor value displays ‘‘Er’’ this indicates there is an open or short in the circuit or sensor. Check for DTCs using the HDS, or use the climate control self-diagnostic function.
 If necessary, compare the sensor input display to a known-good vehicle under the same test conditions.
 If the sensor is out of the normal range, refer to the sensor test or substitute a known-good sensor, and recheck.
5. To cancel the sensor input display mode, press the AUTO button or turn the ignition switch to LOCK (0). (cont’d)
2
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) Checking the DTCs by HDSDTC Detection Item or Symptom ECU DTC type Page
21-15
DTC Troubleshooting Index
B1200 Communication bus line error Climate control
unit Loss of
communication(see page 22-107)
B1202 Climate control unit internal error Climate control
unit Internal error (see page 21-28)
B1205 Climate control unit lost communication with gauge control module (TACH)
(VSP/NE message) Climate control
unit
Loss of
communication(see page 21-28)
B1206 Climate control unit lost communication with gauge control module (TACH) (ECT
message) Climate control
unit
Loss of
communication(see page 21-28)
B1207 Climate control unit lost communication with gauge control module (TACH)
(ILLUMI message) Climate control
unit
Loss of
communication(see page 21-28)
B1220 A short in the recirculation control motor circuit Climate control
unitSignal error (see page 21-29)
B1225 An open in the in-car temperature sensor circuit Climate control
unitSignal error (see page 21-31)
B1226 A short in the in-car temperature sensor circuit Climate control
unitSignal error (see page 21-32)
B1227 An open in the outside air temperature sensor circuit Climate control
unitSignal error (see page 21-33)
B1228 A short in the outside air temperature sensor circuit Climate control
unitSignal error (see page 21-34)
B1229 An open in the sunlight sensor circuit Climate control unitSignal error (see page 21-35)
B1230 A short in the sunlight sensor circuit Climate control unitSignal error (see page 21-36)
B1231 An open in the evaporator temperature sensor circuit Climate control
unitSignal error (see page 21-37)
B1232 A short in the evaporator temperature sensor circuit Climate control
unitSignal error (see page 21-39)
B1233 An open in the air mix control motor circuit Climate control unitSignal error (see page 21-40)
B1234 A short in the air mix control motor circuit Climate control unitSignal error (see page 21-41)
B1235 A problem in the air mix control linkage, door, or motor Climate control
unitSignal error (see page 21-42)
B1239 An open or short in the mode control motor circuit Climate control
unitSignal error (see page 21-44)
B1240 A problem in the mode control linkage, doors, or motor Climate control
unitSignal error (see page 21-46)
B1241 A problem in the blower motor circuit Climate control unitSignal error (see page 21-47)
B2983 A problem in the recirculation control motor linkage, door, or motor Climate control
unitSignal error (see page 21-51)
B2986 An open in the recirculation control motor circuit Climate control
unitSignal error (see page 21-52)
08/08/21 14:40:58 61SNR030_210_0016
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Climate Control Unit Inputs and Outputs
Cavity Wire
color Terminal
name Description Signal
21-24Climate Control
System Description (cont’d)
CLIMATE CONTROL UNIT 32P CONNECTOR
1 GRY ILL Power source for illumination With lighting switch ON: battery
voltage
2 BRN RrDEF Ry Drives rear window defogger relay
3 LT GRN IG2 IG2 power source With ignition switch ON (II): battery voltage
5 BLK GND Ground for climate control unit (G504)
6 RED ACS Outputs A/C ON signal
7 BLK S5V Outputs sensor 5V With ignition switch ON (II): about 5V
8 BRN Teva Detects evaporator temperature sensor signal
9 LT BLU M-COOL Drives air mix control motor COOL side Drive on COOL side: 7 V 15 V
10 WHT M-VENT Drives mode control motor VENT side Drive on VENT side: about 14.5 V
11 PNK M-HOT Drives air mix control motor HOT side Drive on HOT side: 7 V 15 V
12 GRN M-DEF Drives mode control motor DEF side Drive on DEF side: about 14.5 V
13 YEL BLW-G Outputs power transistor gate
14 BLU BLW-V Feedback signal of power transistor drain voltage
15 ORN REC Drives recirculation control motor REC side Drive on REC side: about 14.5 V
16 PUR FRS Drives recirculation control motor FRESH side Drive on FRESH side: about 14.5 V
18 RED ILL Ground for illumination
19 RED S-COM Ground exclusive for sensor
20 BLU MODE 4 Inputs mode motor signal 4
Wire side of female terminals
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Cavity Wirecolor Terminal
name Description Signal
21-25
21 PUR MODE 3 Inputs mode motor signal 3
22 LT GRN MODE 2 Inputs mode motor signal 2
23 ORN MODE 1 Inputs mode motor signal 1
24 PUR Tsun Detects sunlight sensor signal
25 BLU Tam Detects outside air temperature
sensor signal
26 LT BLU Tr Detects in-car sensor signal
27 GRY AMD-P Air mix control motor potentiometer signal Drive on HOT side: about 4.5 V
Drive on COOL side: about 1.5 V
28 RED AC SO SO for navigation communication (A/C side receiving)
29 BLU AC CLK CLK for navigation communication
30 YEL AC SI SI for navigation communication (A/C side transmission)
31 YEL RFD-P Recirculation control motor potentiometer signal
32 PNK B-CAN CAN communication
: With navigation
08/08/21 14:41:02 61SNR030_210_0026
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21-27
RED
(With navigation system)
30 29 28
F3 F2 F4
NAVIGATION UNIT
CLKSO
BLU
RED
YEL 12 V
PURBLU
LT GRN
BRN
BRN
BLU
REAR WINDOW DEFOGGER RELAY DASH LIGHTS
BRIGHTNESS
CONTROLLER
GRY
1
RED 18
2
32 6
PNK 5
3
19 20 21
22 23
12 10 15 16
31 9 11 27 7 24 8 26 25 13 14
G5041
1 2 2
2
YEL
RED REDPNK
LT BLU
RED RED
WHT BLU
LT GRN
PUR
ORN GRN RED
YEL
ORN GRY
PNK
LT BLU YEL
BLU
4
2
1
S-COM
REC
FRS FRD-P S5V
S-COM
M-DEF
M-VENT
MODE 4 MODE 2
MODE 3 MODE 1
2 2 1
BRN
PUR BLK
RED BLK
5V
1
3 5
4 6 1 2
3 5 BLK
CLIMATE CONTROL UNIT 1
2 1
RED
G401GRN
3
WHT
5
3
1
2
BLK
S5V
AMD-P
M-HOT
M-COOLS-COM WHT
7 7
7
DRIVING
CIRCUIT BLOWER
MOTOR
POWER
TRANSISTOR
OUTSIDE AIR
TEMPERATURE SENSOR
AIR MIX
CONTROL
MOTOR
RECIRCULATION
CONTROL
MOTOR
MODE
CONTROL
MOTOR
IN-CAR
TEMPERATURE SENSOR
EVAPORATOR
TEMPERATURE SENSOR
SUNLIGHT SENSOR
No. 14 (7.5 A)
In the under-dash
fuse/relay box SI
: CAN line
B-CAN
08/08/21 14:41:04 61SNR030_210_0028
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