Acura CSX. Manual — part 489
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21-73
21-73
Mode Control Motor Test
Mode Control Motor Replacement
MODE CONTROL MOTOR
A
B
A
B
NOTE: Before testing, check for HVAC DTCs (see page
21-9).
1. Disconnect the 7P connector from the mode control
motor.
Incorrectly applying power and ground to
the mode control motor will damage it.
Follow the instructions carefully.
2. Connect battery power to terminal No. 1 of the
mode control motor, and ground terminal No. 2;
the mode control motor should run smoothly, and
stop at Vent. If it doesn’t, reverse the connections;
the mode control motor should run smoothly, and
stop at Defrost. When the mode control motor
stops running, disconnect battery power
immediately.
3. If the mode control motor did not run in step 2,
remove it, then check the mode control linkage and
doors for smooth movement.
• If the linkage and doors move smoothly, replace
the mode control motor (see page 21-73).
• If the linkage or doors stick or bind, repair them
as needed.
• If the mode control motor runs smoothly, go to
step 4.
4. Use a digital multimeter with an output of 1 mA or
less at the 20 k
range. With the mode control
motor running as in step 2, check for continuity
between terminals No. 3, 4, 5, and 6 and terminal
No. 7 individually. There should be continuity for a
moment at each terminal as the motor moves past
the switch’s terminal.
5. If there is no continuity for a moment at each
terminal, replace the mode control motor (see page
21-73).
1. Remove the glove box (see page 20-104).
2. Remove the wire harness clip (A), the self-tapping
screws, and the passenger’s heater duct (B).
3. Disconnect the 7P connector (A) from the mode
control motor (B). Remove the self-tapping screws
and the mode control motor from the heater unit.
4. Install the motor in the reverse order of removal.
Make sure the pin on the motor is properly
engaged with the linkage. After installation, make
sure the motor runs smoothly.
08/08/21 14:43:38 61SNR030_210_0074
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Recirculate: About 4.0 V
Fresh:
About 1.0 V
21-74
21-74
Climate Control
Recirculation Control Motor Test
Recirculation Control Motor
Replacement
RECIRCULATION CONTROL MOTOR
A
B
NOTE: Before testing, check for HVAC DTCs (see page
21-9).
1. Disconnect the 7P connector from the recirculation
control motor.
Incorrectly applying power and ground to
the recirculation control motor will damage it.
Follow the instructions carefully.
2. Connect battery power to terminal No. 1 of the
recirculation control motor, and ground terminal
No. 2; the recirculation control motor should run,
and stop at Recirculate. If it doesn’t, reverse the
connections; the recirculation control motor should
run, and stop at Fresh. When the recirculation
control motor stops running, disconnect battery
power immediately.
3. If the recirculation control motor did not run in step
2, remove it, then check the recirculation control
linkage and door for smooth movement.
• If the linkage and door move smoothly, replace
the recirculation control motor (see page 21-74).
• If the linkage or door sticks or binds, repair them
as needed.
• If the recirculation control motor runs smoothly,
go to step 4.
4. Measure the resistance between terminals No. 5
and No. 7. It should be between 4.2 to 7.8 k
.
5. Reconnect the recirculation control motor 7P
connector, then turn the ignition switch to ON (II).
6. Using the backprobe set, measure the voltage
between terminals No. 3 and No. 7.
7. If either the resistance or voltage readings are not
as specified, replace the recirculation control motor
(see page 21-74).
1. Remove the glove box (see page 20-104) and the
kick panel (see page 20-66).
2. Disconnect the 7P connector (A) from the
recirculation control motor (B). Remove the self-
tapping screws and the recirculation control motor
from the blower unit.
3. Install the motor in the reverse order of removal.
Make sure the pin on the motor is properly
engaged with the linkage. After installation, make
sure the motor runs smoothly.
08/08/21 14:43:38 61SNR030_210_0075
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21-75
21-75
Climate Control Unit Removal/
Installation
Dust and Pollen Filter Replacement
B
A
A
A
B
1. Remove the center panel:
• ’06-08 models with navigation (see page 23-155)
• ’06-08 models without navigation (see page
23-80)
• ’09 model with navigation (see page 23-355)
• ’09 model without navigation (see page 23-256)
2. Remove the dials (A), the self-tapping screws, and
the climate control unit (B).
3. Install the control unit in the reverse order of
removal. After installation, operate the various
functions to see whether works properly.
4. Run the self-diagnostic function to confirm that
there are no problems in the system (see page
21-11).
1. Open the glove box. Remove the glove box stop on
each side, then let the glove box hang down
(see page 20-104).
2. Remove the dust and pollen filter assembly (A)
from the evaporator.
3. Remove the filter (A) from the housing (B), and
replace the filter.
4. Install the filter in the reverse order of removal.
Make sure that there is no air leaking out of the
evaporator.
08/08/21 14:43:39 61SNR030_210_0076
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02
03
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21-76
Climate Control
Blower Unit Removal/Installation
A
A
A
B
B
A
1. Remove the glove box (see page 20-104).
2. Cut the plastic cross brace (A) in the glove box
opening with diagonal cutters in the area shown,
and discard it.
3. Remove the bolts and the glove box frame (A).
4. Remove the wire harness clip (A), the self-tapping
screws, and the passenger’s heater duct (B).
5. Disconnect the connector (A) from the blower
motor. Remove the wire harness clip (B).
Cut here.
08/08/21 14:43:40 61SNR030_210_0077
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