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Acura CSX. Manual - part 489

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21-73

Mode Control Motor Test

Mode Control Motor Replacement

MODE CONTROL MOTOR

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

Climate Control

Recirculation Control Motor Test

Recirculation Control Motor
Replacement

RECIRCULATION CONTROL MOTOR

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

Climate Control Unit Removal/
Installation

Dust and Pollen Filter Replacement

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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21-76

Climate Control

Blower Unit Removal/Installation

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

Content .. 487 488 489 490 ..