sensor ACURA CSX 2006 Service Repair Manual

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21-26Climate Control
Circuit Diagram
PNK
RED/BLK
12
1 2
Q6
1 2
GRN/REDRED
IG2 HOT in ON (II)
CAN HI
CAN LO
FAN HI ACC L
FAN LO A14
A4
A5 13
A/C COMPRESSOR
2
RED/WHT
BLU
F26 MICU
1
19
21
A37
A36
BLK
A9 A33 A16 A19 PNK
WHT RED
1
23
RED
LT GRN
5V
BLK
VCC6
ACPD
TW2 GRN12
SG BLK
No. 15
(7.5 A)
(20 A) No. 6 A/C DIODE A
GRY RED
WHT
LT GRN
BRN
42 3 5
1 IG2
BAT
ORNNo. 36 (10 A)
BRN
BLK RED
BLU
2
1
G301 ECM/PCM
BATTERY
No. 1 (BAT) (100 A)
24
2
3
PUR
13
41 No. 9 (40 A)
No. 2 (IG) (50 A)
1
3
42
WHT
BLK
G301
No.20(7.5A)
1
3
2
4
PUR
UNDER-HOOD FUSE/RELAY BOX IGNITION SWITCH
UNDER-DASH
FUSE/RELAY BOX
RADIATOR
FAN RELAY
FAN CONTROL
RELAY
A/C
CONDENSER
FAN RELAY A/C
COMPRESSOR
CLUTCH RELAY
BLOWER
MOTOR
RELAY
RADIATOR
FAN
MOTOR
PGM-FI
SUB
RELAY
A/C
CONDENSER
FAN
MOTOR
ENGINE
COOLANT
TEMPERATURE
(ECT) SENSOR 2A/C PRESSURE
SENSOR
GAUGE
CONTROL
MODULE
(TACH)
A/C
COMPRESSOR
CLUTCH
UNDER-DASH
FUSE/RELAY
BOX
THERMAL
PROTECTOR
A/C
DIODE B
H1 C3 Q16
G12
D1
F11 F14 F12 F2 F7 F20 E8 F1 J2 No. 7 (20 A)
08/08/21 14:41:03 61SNR030_210_0027
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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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DTC B1225 or DTC indicator A:
YES
NO
YES
NO YES
NO
YES
NO
21-31
IN-CAR TEMPERATURE SENSOR 2P CONNECTOR
LT BLU LT BLU
CLIMATE CONTROL UNIT 32P CONNECTOR
IN-CAR TEMPERATURE SENSOR 2P CONNECTOR RED
RED
CLIMATE CONTROL UNIT 32P CONNECTOR
An Open in
the In-car Temperature Sensor Circuit
1. Clear the DTC with the HDS.
2. Turn the ignition switch to LOCK (0), and then turn
to ON (II).
3. Do the self-diagnostic with the HDS (see page 21-10) or climate control unit (see page 21-11).
4. Check for DTCs.
Go to step 5.
Intermittent failure, check for loose wires or
poor connections on the in-car temperature sensor
circuit.
5. Turn the ignition switch to LOCK (0).
6. Remove the in-car temperature sensor (see page 21-67), and test it (see page 21-67).
Go to step 7.
Replace the in-car temperature sensor.
7. Disconnect the climate control unit 32P connector. 8. Check for continuity between the climate control
unit 32P connector terminal No. 26 and the in-car
temperature sensor 2P connector terminal No. 1.
Go to step 9.
Repair open in the wire between the climate
control unit and the in-car temperature sensor.
9. Check for continuity between the climate control unit 32P connector terminal No. 19 and the in-car
temperature sensor 2P connector terminal No. 2.
Check for loose wires or poor connections at
the climate control unit 32P connector and at the
outside air temperature sensor 2P connector. If the
connections are good, substitute a known-good
climate control unit, and recheck. If the symptom/
indication goes away, replace the original climate
control unit.
Repair open in the wire between the climate
control unit and the in-car temperature sensor.
Wire side of female terminals
Wire side of female terminals
Wire side of female terminals
Wire side of female terminals
I s DT C B1225 or A i nd i cat ed ?
Is t he i n-car t emper at ur e sensor OK ? Is there continuity?
Is there continuity?
08/08/21 14:42:15 61SNR030_210_0032
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DTC B1226 or DTC indicator B:
YES
NO
YES
NO YES
NO
YES
NO
21-32Climate Control
DTC Troubleshooting (cont’d)
LT BLU
CLIMATE CONTROL UNIT 32P CONNECTOR
RED LT BLU
CLIMATE CONTROL UNIT 32P CONNECTOR
A Short in the
In-car Temperature Sensor Circuit
1. Clear the DTC with the HDS.
2. Turn the ignition switch to LOCK (0), and then turn
to ON (II).
3. Do the self-diagnostic with the HDS (see page 21-10) or climate control unit (see page 21-11).
4. Check for DTCs.
Go to step 5.
Intermittent failure.
5. Turn the ignition switch to LOCK (0).
6. Remove the in-car temperature sensor (see page 21-67), and test it (see page 21-67).
Go to step 7.
Replace the in-car temperature sensor.
7. Disconnect the climate control unit 32P connector. 8. Check for continuity between body ground and the
climate control unit 32P connector terminal No. 26.
Repair short to body ground in the wire
between the climate control unit and the in-car
temperature sensor.
Go to step 9.
9. Check for continuity between the climate control unit 32P connector terminals No. 19 and No. 26.
Repair short in the wires between the climate
control unit and the in-car temperature sensor.
Substitute a known-good climate control unit,
and recheck. If the symptom/indication goes away,
replace the original climate control unit.
Wire side of female terminals
Wire side of female terminals
I s DT C B1226 or B i nd i cat ed ?
Is t he i n-car t emper at ur e sensor OK ? Is there continuity?
Is there continuity?
08/08/21 14:42:16 61SNR030_210_0033
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DTC B1227 or DTC indicator C:
YES
NO
YES
NO YES
NO
21-33
YEL
OUTSIDE AIR TEMPERATURE SENSOR 2P CONNECTOR CLIMATE CONTROL UNIT 32P CONNECTOR
BLU
An Open in
the Outside Air Temperature Sensor Circuit
1. Clear the DTC with the HDS.
2. Turn the ignition switch to LOCK (0), and then turn
to ON (II).
3. Do the self-diagnostic with the HDS (see page 21-10) or climate control unit (see page 21-11).
4. Check for DTCs.
Go to step 5.
Intermittent failure, check for loose wires or
poor connections on the outside air temperature
sensor circuit.
5. Turn the ignition switch to LOCK (0).
6. Remove the outside air temperature sensor (see page 21-68), and test it (see page 21-68).
Go to step 7.
Replace the outside air temperature sensor.
7. Disconnect the climate control unit 32P connector. 8. Check for continuity between the climate control
unit 32P connector terminal No. 25 and the outside
air temperature sensor 2P connector terminal No. 1.
Go to step 9.
Repair open in the wire between the climate
control unit and the outside air temperature
sensor.
(cont’d)
Wire side of female terminalsWire side of female terminals
I s DT C B1227 or C i nd i cat ed ?
Is t he out si d e ai r t emper at ur e sensor OK ? Is there continuity?
08/08/21 14:42:16 61SNR030_210_0034
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YES
NO YES
NO
YES
NO
DTC B1228 or DTC indicator D:
21-3421-34Climate Control
DTC Troubleshooting (cont’d)
PNK
OUTSIDE AIR TEMPERATURE SENSOR 2P CONNECTOR RED
CLIMATE CONTROL UNIT 32P CONNECTOR
9. Check for continuity between the climate control
unit 32P connector terminal No. 19 and the outside
air temperature sensor 2P connector terminal No. 2.
Check for loose wires or poor connections at
the climate control unit 32P connector and at the
outside air temperature sensor 2P connector. If the
connections are good, substitute a known-good
climate control unit, and recheck. If the symptom/
indication goes away, replace the original climate
control unit.
Repair open in the wire between the climate
control unit and the outside air temperature
sensor. 1. Clear the DTC with the HDS.
2. Turn the ignition switch to LOCK (0), and then turn
to ON (II).
3. Do the self-diagnostic with the HDS (see page 21-10) or climate control unit (see page 21-11).
4. Check for DTCs.
Go to step 5.
Intermittent failure.
5. Turn the ignition switch to LOCK (0).
6. Remove the outside air temperature sensor (see page 21-68), and test it (see page 21-68).
Go to step 7.
Replace the outside air temperature sensor.
7. Disconnect the climate control unit 32P connector.A Short in the
Outside Air Temperature Sensor Circuit
Wire side of female terminals
Wire side of female terminals
Is there continuity?
I s DT C B1228 or D i nd i cat ed ?
Is t he out si d e ai r t emper at ur e sensor OK ?
08/08/21 14:42:16 61SNR030_210_0035
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YES
NO
YES
NO YES
NO
YES
NO
DTC B1229 or DTC indicator E:
21-3521-35
CLIMATE CONTROL UNIT 32P CONNECTOR
BLU
RED
CLIMATE CONTROL UNIT 32P CONNECTOR
BLU
SUNLIGHT SENSOR 2P CONNECTORPUR
PUR
CLIMATE CONTROL UNIT 32P CONNECTOR
8. Check for continuity between body ground and the
climate control unit 32P connector terminal No. 25.
Repair short to body ground in the wire
between the climate control unit and the outside air
temperature sensor.
Go to step 9.
9. Check for continuity between the climate control unit 32P connector terminals No. 19 and No. 25.
Repair short in the wires between the climate
control unit and the outside air temperature
sensor.
Substitute a known-good climate control unit,
and recheck. If the symptom/indication goes away,
replace the original climate control unit. 1. Clear the DTC with the HDS.
2. Turn the ignition switch to LOCK (0), and then turn
to ON (II).
3. Do the self-diagnostic with the HDS (see page 21-10) or climate control unit (see page 21-11).
4. Check for DTCs.
Go to step 5.
Intermittent failure, check for loose wires or
poor connections on the sunlight sensor circuit.
5. Turn the ignition switch to LOCK (0).
6. Disconnect the sunlight sensor 2P connector.
7. Disconnect the climate control unit 32P connector.
8. Check for continuity between the climate control unit 32P connector terminal No. 24 and the sunlight
sensor 2P connector terminal No. 2.
Go to step 9.
Repair open in the wire between the climate
control unit and the sunlight sensor.
(cont’d)An Open in
the Sunlight Sensor Circuit
Wire side of female terminals
Wire side of female terminals
Wire side of female terminalsWire side of female terminals
Is there continuity?
Is there continuity? I s DT C B1229 or E i nd i cat ed ?
Is there continuity?
08/08/21 14:42:17 61SNR030_210_0036
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YES
NO
YES
NO
YES
NO
YES
NO
DTC B1230 or DTC indicator F:
21-3621-36Climate Control
DTC Troubleshooting (cont’d)
SUNLIGHT SENSOR 2P CONNECTOR
RED
RED
CLIMATE CONTROL UNIT 32P CONNECTOR
PUR
CLIMATE CONTROL UNIT 32P CONNECTOR
9. Check for continuity between the climate control
unit 32P connector terminal No. 19 and the sunlight
sensor 2P connector terminal No. 1.
Go to step 10.
Repair open in the wire between the climate
control unit and the sunlight sensor.
10. Reconnect the sunlight sensor 2P connector.
11. Reconnect the climate control unit 32P connector.
12. Test the sunlight sensor (see page 21-69).
Check for loose wires or poor connections at
the climate control unit 32P connector and at the
sunlight sensor 2P connector. If the connections are
good, substitute a known-good climate control unit,
and recheck. If the symptom/indication goes away,
replace the original climate control unit.
Replace the sunlight sensor (see page 21-69). 1. Clear the DTC with the HDS.
2. Turn the ignition switch to LOCK (0), and then turn
to ON (II).
3. Do the self-diagnostic with the HDS (see page 21-10) or climate control unit (see page 21-11).
4. Check for DTCs.
Go to step 5.
Intermittent failure.
5. Turn the ignition switch to LOCK (0).
6. Disconnect the sunlight sensor 2P connector.
7. Disconnect the climate control unit 32P connector.
8. Check for continuity between body ground and the climate control unit 32P connector terminal No. 24.
Repair short to body ground in the wire
between the climate control unit and the sunlight
sensor.
Go to step 9.A Short in the
Sunlight Sensor Circuit
Wire side of female terminals
Wire side of female terminals
Wire side of female terminals
Is there continuity?I s t he sunl i ght sensor OK ? I s DT C B1230 or F i nd i cat ed ?
Is there continuity?
08/08/21 14:42:17 61SNR030_210_0037
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YES
NO
YES
NO YES
NO
YES
NO
DTC B1231 or DTC indicator G:
21-3721-37
RED
PUR
CLIMATE CONTROL UNIT 32P CONNECTOR
9. Check for continuity between the climate control
unit 32P connector terminals No. 19 and No. 24.
Repair short in the wires between the climate
control unit and the sunlight sensor.
Go to step 10.
10. Reconnect the sunlight sensor 2P connector.
11. Reconnect the climate control unit 32P connector.
12. Test the sunlight sensor (see page 21-69).
Substitute a known-good climate control unit,
and recheck. If the symptom/indication goes away,
replace the original climate control unit.
Replace the sunlight sensor (see page 21-69). 1. Clear the DTC with the HDS.
2. Turn the ignition switch to LOCK (0), and then turn
to ON (II).
3. Do the self-diagnostic with the HDS (see page 21-10) or climate control unit (see page 21-11).
4. Check for DTCs.
Go to step 5.
Intermittent failure, check for loose wires or
poor connections on the evaporator temperature
sensor circuit.
5. Turn the ignition switch to LOCK (0).
6. Remove the evaporator temperature sensor (see page 21-78), and test it (see page 21-70).
Go to step 7.
Replace the evaporator temperature
sensor.
(cont’d)An Open in
the Evaporator Temperature Sensor Circuit
Wire side of female terminals
Is there continuity?
I s t he sunl i ght sensor OK ? I s DT C B1231 or G i nd i cat ed ?
Is t he ev apor at or t emper at ur e sensor OK ?
08/08/21 14:42:18 61SNR030_210_0038
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µ
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YES
NO
YES
NO
21-38Climate Control
DTC Troubleshooting (cont’d)
BRN
BRN
EVAPORATOR TEMPERATURE SENSOR 2P CONNECTOR CLIMATE CONTROL UNIT 32P CONNECTOR
RED
EVAPORATOR TEMPERATURE SENSOR 2P CONNECTOR RED
CLIMATE CONTROL UNIT 32P CONNECTOR
7. Disconnect the climate control unit 32P connector.
8. Check for continuity between the climate control
unit 32P connector terminal No. 8 and the
evaporator temperature sensor 2P connector
terminal No. 2.
Go to step 9.
Repair open in the wire between the climate
control unit and the evaporator temperature
sensor. 9. Check for continuity between the climate control
unit 32P connector terminal No. 19 and the
evaporator temperature sensor 2P connector
terminal No. 1.
Check for loose wires or poor connections at
the climate control unit 32P connector and at the
evaporator temperature sensor 2P connector. If the
connections are good, substitute a known-good
climate control unit, and recheck. If the symptom/
indication goes away, replace the original climate
control unit.
Repair open in the wire between the climate
control unit and the evaporator temperature
sensor.
Wire side of female terminals
Wire side of female terminals
Wire side of female terminals
Wire side of female terminals
Is there continuity?
Is there continuity?
08/08/21 14:42:18 61SNR030_210_0039
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