Content .. 480 481 482 483 ..

Acura CSX. Manual - part 482

０１

ＳＮＲ９Ａ００Ｋ７１１０００Ｙ１２４０ＦＡＡＴ００

−

DTC B1240 or DTC indicator N:

YES

21-46

Climate Control

CLIMATE CONTROL UNIT 32P CONNECTOR

GRN

WHT

MODE CONTROL MOTOR 7P CONNECTOR

WHT

GRN

A Problem in

the Mode Control Linkage, Doors, or Motor

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 mode control motor 7P connector.

7. Disconnect the climate control unit 32P connector.

8. Check for continuity between the following

terminals of climate control unit 32P connector and
the mode control motor 7P connector.

32P:

7P:

No. 10

No. 1

No. 12

No. 2

Go to step 9.

Repair open in the wire(s) between the

climate control unit and the mode control motor.

Wire side of female terminals

Is DT C B1240 or N indicated?

Is ther e continuity?

08/08/21 14:42:21 61SNR030_210_0047

０２

０１

ＳＮＲ９Ａ００Ｋ７１１０００Ｙ１２４１ＦＡＡＴ００

−

YES

DTC B1241 or DTC indicator P:

21-47

WHT

GRN

CLIMATE CONTROL UNIT 32P CONNECTOR

BLOWER MOTOR 2P CONNECTOR

JUMPER WIRE

GRN

9. Check for continuity between body ground and the

climate control unit 32P connector terminals No. 10
and No. 12 individually.

Repair short to body ground in the wire(s)

between the climate control unit and the mode
control motor.

Go to step 10.

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

Substitute a known-good climate control unit,

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

Replace the mode control motor (see page

21-73), or repair the mode control linkage or
doors.

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 blower motor circuit.

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

6. Check the No. 9 (40 A) fuse in the under-hood

fuse/relay box, and the No. 36 (10 A) fuse in the
under-dash fuse/relay box.

Go to step 7.

Replace the fuses, and recheck. If the fuses

blow again, check for a short in the No. 9 (40 A) and
No. 36 (10 A) fuses circuit.

7. Connect the blower motor 2P connector terminal

No. 2 to body ground with a jumper wire.

A Problem in

the Blower Motor Circuit

Wire side of female terminals

Is ther e continuity?

Is the mode contr ol motor OK ?

Is DT C B1241 or P indicated?

Ar e the f uses OK ?

08/08/21 14:42:21 61SNR030_210_0048

０２

０３

０４

−

YES

21-48

Climate Control

POWER TRANSISTOR 4P CONNECTOR

BLK

POWER TRANSISTOR 4P CONNECTOR

BLK

JUMPER WIRE

GRN

BLU

YEL

CLIMATE CONTROL UNIT 32P CONNECTOR

8. Turn the ignition switch to ON (II).

Go to step 9.

Go to step 24.

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

10. Disconnect the jumper wire.

11. Disconnect the power transistor 4P connector.

12. Check for continuity between the power transistor

4P connector terminal No. 2 and body ground.

Go to step 13.

Check for an open in the wire between the

power transistor and body ground. If the wire is OK,
check for poor ground at G401 (see page 22-64).

13. Connect the power transistor 4P connector

terminals No. 2 and No. 4 with a jumper wire.

14. Turn the ignition switch to ON (II).

Go to step 15.

Repair open in the GRN wire between the

power transistor and the blower motor.

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

16. Disconnect the jumper wire.

17. Disconnect the climate control unit 32P connector.

18. Check for continuity between body ground and the

climate control unit 32P connector terminals No. 13
and No. 14 individually.

Repair short to body ground in the wire(s)

between the climate control unit and the power
transistor.

Go to step 19.

Wire side of female terminals

Does the blower motor r un?

Is ther e continuity?

Does the blower motor r un at high speed?

Is ther e continuity?

08/08/21 14:42:22 61SNR030_210_0049

０５

０６

０７

−

YES

21-49

BLU

YEL

BLU

YEL

POWER TRANSISTOR 4P CONNECTOR

CLIMATE CONTROL UNIT 32P CONNECTOR

BLU

YEL

CLIMATE CONTROL UNIT 32P CONNECTOR

BLOWER MOTOR 2P CONNECTOR

WHT

19. Check for continuity between the following

terminals of the climate control unit 32P connector
and the power transistor 4P connector.

32P:

4P:

No. 13

No. 1

No. 14

No. 3

Go to step 20.

Repair open in the wire(s) between the

climate control unit and the power transistor.

20. Turn the ignition switch to ON (II).

21. Measure the voltage between body ground and the

climate control unit 32P connector terminals No. 13
and No. 14 individually.

Repair short to power in the wire(s).

Go to step 22.

22. Reconnect the climate control unit 32P connector.

23. Test the power transistor (see page 21-71).

Check for loose wires or poor connections at

the climate control unit 32P connector and at the
power transistor 4P 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.

Replace the power transistor.

24. Disconnect the jumper wire.

25. Disconnect the blower motor 2P connector.

26. Measure the voltage between the blower motor 2P

connector terminal No. 1 and body ground.

Replace the blower motor.

Go to step 27.

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

28. Remove the blower motor relay from the under-

hood fuse/relay box, and test it (see page 22-70).

Go to step 29.

Replace the blower motor relay.

Wire side of female terminals

Is ther e continuity?

Is ther e voltage?

Is the power tr ansistor OK ?

Is ther e batter y voltage?

Is the r elay OK ?

08/08/21 14:42:22 61SNR030_210_0050

Content .. 480 481 482 483 ..