Content .. 479 480 481 482 ..

Acura CSX. Manual - part 481

＊０２

ＳＮＲ９Ａ００Ｋ７１１０００Ｙ１２３５ＦＡＡＴ００

−

YES

DTC B1235 or DTC indicator L:

21-42

Climate Control

RED

CLIMATE CONTROL UNIT 32P CONNECTOR

BLK

GRY

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 air mix 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.

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 air mix control motor 7P connector.

7. Disconnect the climate control unit 32P connector.

A Problem in

the Air Mix Control Linkage, Door, or Motor

Wire side of female terminals

Is ther e any voltage?

Is DT C B1235 or L indicated?

08/08/21 14:42:19 61SNR030_210_0043

０１

０２

−

YES

21-43

AIR MIX CONTROL MOTOR 7P CONNECTOR

PNK

LT BLU

CLIMATE CONTROL UNIT 32P CONNECTOR

LT BLU

PNK

LT BLU

PNK

CLIMATE CONTROL UNIT 32P CONNECTOR

8. 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. 9

No. 2

No. 11

No. 1

Go to step 9.

Repair open in the wire(s) between the

climate control unit and the air mix control
motor.

9. Check for continuity between body ground and the

climate control unit 32P connector terminals No. 9
and No. 11 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. Test the air mix control motor (see page 21-72).

Substitute a known-good climate control unit,

and recheck. If the symptom/indication goes away,
replace the original climate control unit.

Replace the air mix control motor (see page

21-72), or repair the air mix control linkage or
door.

Wire side of female terminals

Is ther e continuity?

Is the air mix contr ol motor OK ?

08/08/21 14:42:20 61SNR030_210_0044

＊０１

ＳＮＲ９Ａ００Ｋ７１１０００Ｙ１２３９ＦＡＡＴ００

−

DTC B1239 or DTC indicator M:

YES

21-44

Climate Control

MODE CONTROL MOTOR 7P CONNECTOR

BLU

PUR

ORN

LT GRN

RED

PUR

BLU

RED

ORN

LT GRN

CLIMATE CONTROL UNIT 32P CONNECTOR

An Open or

Short in the Mode 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 mode control motor
circuit.

5. Turn the ignition switch to LOCK (0).

6. Test the mode control motor (see page 21-73).

Go to step 7.

Replace the mode control motor (see page

21-73).

7. Disconnect the mode 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 mode control motor 7P connector.

32P:

7P:

No. 19

No. 7

No. 20

No. 3

No. 21

No. 4

No. 22

No. 5

No. 23

No. 6

Go to step 10.

Repair open in the wire(s) between the

climate control unit and the mode control motor.

Wire side of female terminals

Is DT C B1239 or M indicated?

Is the mode contr ol motor OK ?

Is ther e continuity?

08/08/21 14:42:20 61SNR030_210_0045

０２

０３

−

YES

21-45

RED

ORN

BLU

PUR

LT GRN

CLIMATE CONTROL UNIT 32P CONNECTOR

RED

ORN

BLU

PUR

LT GRN

CLIMATE CONTROL UNIT 32P CONNECTOR

10. Check for continuity between body ground and the

climate control unit 32P connector terminals
No. 19, 20, 21, 22, and No. 23 individually.

Repair short to body ground in the wire(s)

between the climate control unit and the mode
control motor.

Go to step 11.

11. Check for continuity between the climate control

unit 32P connector terminals as follows.

From terminal

To terminals

20, 21, 22, 23

21, 22, 23

22, 23

Repair the short in the wires.

Go to step 12.

12. 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 mode control motor.
This short may also damage the climate control
unit. Repair the short to power before replacing the
climate control unit.

Check for loose wires or poor connections at

the climate control unit 32P connector and at the
mode 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.

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 14:42:20 61SNR030_210_0046

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