Acura CSX. Manual — part 478
01
02
−
−
−
−
−
−
YES
NO
YES
NO
YES
NO
21-30
Climate Control
BLK
YEL
RED
CLIMATE CONTROL UNIT 32P CONNECTOR
BLK
YEL
RED
CLIMATE CONTROL UNIT 32P CONNECTOR
9. Check for continuity between body ground and the
climate control unit 32P connector terminals No. 7,
19, and No. 31 individually.
Repair short to body ground in the wire(s)
between the climate control unit and the
recirculation control motor.
Go to step 10.
10. Check for continuity between the climate control
unit 32P connector terminals as follows.
From terminal
To terminals
7
19, 31
19
31
Repair the short in the wires.
Go to step 11.
11. Turn the ignition switch to ON (II), and measure the
same terminals for voltage to body ground.
Repair short to power in the wire(s) between
the climate control unit and the recirculation
control motor. This short may also damage the
climate control unit. Repair the short to power
before replacing the climate control unit.
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
Is ther e continuity?
Is ther e continuity between any of the ter minals?
Is ther e any voltage?
08/08/21 14:42:15 61SNR030_210_0031
01
*01
SNR9A00K711000Y1225FAAT00
−
−
−
−
−
−
−
−
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
Is DT C B1225 or A indicated?
Is the in-car temper atur e sensor OK ?
Is ther e continuity?
Is ther e continuity?
08/08/21 14:42:15 61SNR030_210_0032
01
02
SNR9A00K711000Y1226FAAT00
−
−
−
−
−
−
−
−
DTC B1226 or DTC indicator B:
YES
NO
YES
NO
YES
NO
YES
NO
21-32
Climate Control
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
Is DT C B1226 or B indicated?
Is the in-car temper atur e sensor OK ?
Is ther e continuity?
Is ther e continuity?
08/08/21 14:42:16 61SNR030_210_0033
01
SNR9A00K711000Y1227FAAT00
−
−
−
−
−
−
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.
Wire side of female terminals
Wire side of female terminals
Is DT C B1227 or C indicated?
Is the outside air temper atur e sensor OK ?
Is ther e continuity?
08/08/21 14:42:16 61SNR030_210_0034
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