Acura CSX. Manual — part 480
01
02
−
−
−
−
YES
NO
YES
NO
21-38
Climate Control
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 ther e continuity?
Is ther e continuity?
08/08/21 14:42:18 61SNR030_210_0039
01
02
SNR9A00K711000Y1232FAAT00
−
−
−
−
−
−
−
−
DTC B1232 or DTC indicator H:
YES
NO
YES
NO
YES
NO
YES
NO
21-39
BRN
CLIMATE CONTROL UNIT 32P CONNECTOR
RED
BRN
CLIMATE CONTROL UNIT 32P CONNECTOR
A Short in the
Evaporator 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 evaporator temperature sensor
(see page 21-78), and test it (see page 21-70).
Go to step 7.
Replace the evaporator 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. 8.
Repair short to body ground in the wires
between the climate control unit and the
evaporator temperature sensor.
Go to step 9.
9. Check for continuity between the climate control
unit 32P connector terminals No. 8 and No. 19.
Repair short in the wires between the climate
control unit and the evaporator 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 B1232 or H indicated?
Is the evapor ator temper atur e sensor OK ?
Is ther e continuity?
Is ther e continuity?
08/08/21 14:42:19 61SNR030_210_0040
01
SNR9A00K711000Y1233FAAT00
−
−
−
−
−
−
DTC B1233 or DTC indicator J:
YES
NO
YES
NO
YES
NO
21-40
Climate Control
AIR MIX CONTROL MOTOR 7P CONNECTOR
GRY
BLK
GRY
RED
BLK
RED
CLIMATE CONTROL UNIT 32P CONNECTOR
An Open in
the Air Mix Control Motor 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 air mix control motor
circuit.
5. Turn the ignition switch to LOCK (0).
6. Test the air mix control motor (see page 21-72).
Go to step 7.
Replace the air mix control motor (see page
21-72).
7. Disconnect the air mix control motor 7P connector.
8. Disconnect the climate control unit 32P connector.
9. Check for continuity between the following
terminals of the climate control unit 32P connector
and the air mix control motor 7P connector.
32P:
7P:
No. 7
No. 5
No. 19
No. 7
No. 27
No. 3
Check for loose wires or poor connections at
the climate control unit 32P connector and at the air
mix control motor 7P 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(s) between the
climate control unit and the air mix control
motor.
Wire side of female terminals
Wire side of female terminals
Is DT C B1233 or J indicated?
Is the air mix contr ol motor OK ?
Is ther e continuity?
08/08/21 14:42:19 61SNR030_210_0041
*01
SNR9A00K711000Y1234FAAT00
−
−
−
−
−
−
−
−
DTC B1234 or DTC indicator K:
YES
NO
YES
NO
YES
NO
YES
NO
21-41
RED
CLIMATE CONTROL UNIT 32P CONNECTOR
BLK
GRY
A Short in the
Air Mix Control Motor 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. Test the air mix control motor (see page 21-72).
Go to step 7.
Replace the air mix control motor (see page
21-72).
7. Disconnect the air mix control motor 7P connector.
8. Disconnect the 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. 27 individually.
Repair short to body ground in the wire(s)
between the climate control unit and the air mix
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, 27
19
27
Repair the short in the wires.
Go to step 11.
Wire side of female terminals
Is DT C B1234 or K indicated?
Is the air mix contr ol motor OK ?
Is ther e continuity?
Is ther e continuity between any of the ter minals?
08/08/21 14:42:19 61SNR030_210_0042
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