Content .. 482 483 484 485 ..

Acura CSX. Manual - part 484

＊０１

＊０２

ＳＮＲ９ＡＮ１Ｇ１０５０００１６６８５ＦＡＡＴ００

−

YES

21-54

Climate Control

Navigation Communication Line Circuit Troubleshooting

NAVIGATION UNIT CONNECTOR F (5P)

CLIMATE CONTROL UNIT 32P CONNECTOR

RED

BLU

YEL

BLU

RED

CLIMATE CONTROL UNIT 32P CONNECTOR

NAVIGATION UNIT CONNECTOR D (12P)

BLU

YEL

BLU

YEL

RED

1. Operate the climate control system in several

modes.

Go to step 2.

Do the self-diagnostic with the HDS (see page

21-10) or climate control unit (see page 21-11).

2. Do the Navi system link (see page 23-135).

• ’06-08 models: Go to step 3.
• ’09 model: Go to step 7.

Go to step 13.

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

4. Disconnect navigation unit connector F (5P).

5. Disconnect climate control unit 32P connector.

6. Check for continuity between the following

terminals of climate control unit 32P connector and
navigation unit connector F (5P).

32P:

5P:

No. 28

No. 4

No. 29

No. 2

No. 30

No. 3

Go to step 11.

Repair open in the wire(s) between the

climate control unit and the navigation unit.

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

8. Disconnect navigation unit connector D (12P).

9. Disconnect climate control unit 32P connector.

10. Check for continuity between the following

terminals of climate control unit 32P connector and
navigation unit connector D (12P).

32P:

12P:

No. 28

No. 6

No. 29

No. 12

No. 30

No. 5

Go to step 11.

Repair open in the wire(s) between the

climate control unit and the navigation unit.

Wire side of female terminals

Is the climate contr ol system OK ?

Is the Air -Con icon r ed?

Is ther e continuity?

08/08/21 14:42:24 61SNR030_210_0055

＊０３

＊０４

−

YES

21-55

CLIMATE CONTROL UNIT 32P CONNECTOR

RED

YEL

BLU

CLIMATE CONTROL UNIT 32P CONNECTOR

RED

BLU

YEL

JUMPER WIRE

11. Check for continuity between body ground and

climate control unit 32P connector terminals No. 28,
29, and No. 30 individually.

Repair short to body ground in the wire(s)

between the climate control unit and the navigation
unit.

Go to step 12.

12. Reconnect climate control unit 32P connector.

13. ’06-08 models: Disconnect navigation unit

connector F (5P).
’09 model: Disconnect navigation unit connector D
(12P).

14. Connect climate control unit 32P connector

terminals No. 28, 29, and No. 30 with a jumper wire.

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

16. Press the RECIRCULATION and OFF buttons.

Troubleshoot the navigation system: ’06-08

models (see page 23-130), ’09 model (see page
23-346).

Substitute a known-good climate control unit,

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

Wire side of female terminals

Is ther e continuity?

Does the RECIRCULAT ION indicator tur n on?

08/08/21 14:42:25 61SNR030_210_0056

０１

０２

ＳＮＲ９Ａ００Ｇ１０１１０２４９１１２ＦＡＡＴ１０

−

YES

21-56

Climate Control

Radiator and A/C Condenser Fan Low Speed Circuit Troubleshooting

RADIATOR FAN RELAY 4P SOCKET

JUMPER WIRE

BRN

NOTE:

• Do not use this troubleshooting procedure if the A/C

compressor is inoperative. Refer to the symptom
troubleshooting index.

• Before performing symptom troubleshooting, check

for powertrain DTCs (see page 11-3).

1. Check the No. 7 (20 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 2.

Replace the fuses, and recheck. If the fuses

blow again, check for a short in the No. 7 (20 A) and
No. 36 (10 A) fuses circuit.

2. Remove the radiator fan relay from the under-hood

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

Go to step 3.

Replace the radiator fan relay.

3. Connect the HDS to the DLC.

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

5. Turn on the A/C.

6. Check the FAN LOW CTRL in the PGM-FI Data List

with the HDS.

Go to step 7.

Substitute a known-good ECM/PCM (see page

11-7), and retest. If the symptom/indication goes
away with a known-good ECM/PCM, replace the
original ECM/PCM (see page 11-228).

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

8. Measure the voltage between the radiator fan relay

4P socket terminal No. 1 and body ground.

Go to step 9.

Replace the under-hood fuse/relay box

(see page 22-65).

9. Connect the radiator fan relay 4P socket terminals

No. 1 and No. 2 with a jumper wire.

Go to step 10.

Go to step 19.

Ar e the f uses OK ?

Is the r elay OK ?

Is the F AN LOW CT RL on?

Is ther e batter y voltage?

Do the A/ C condenser and r adiator f ans r un on
low?

08/08/21 14:42:25 61SNR030_210_0057

０３

０４

−

YES

21-57

RADIATOR FAN RELAY 4P SOCKET

ECM/PCM CONNECTOR A (44P)

PUR

JUMPER WIRE

10. Disconnect the jumper wire.

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

12. Measure the voltage between the radiator fan relay

4P socket terminal No. 3 and body ground.

Go to step 13.

Go to step 37.

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

14. Reinstall the radiator fan relay.

15. Jump the SCS line with the HDS.

NOTE: This step must be done to protect the engine
control module (ECM)/powertrain control module
(PCM) from damage.

16. Disconnect ECM/PCM connector A (44P).

17. Connect the ECM/PCM connector A (44P) terminal

No. 4 to body ground with a jumper wire.

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

Check for loose wires or poor connections at

ECM/PCM connector A (44P) terminal No. 4. If the
connections are good, substitute a known-good
ECM/PCM, and recheck. If the symptom/indication
goes away, replace the original ECM/PCM
(see page 11-228).

Repair open in the wire between the radiator

fan relay and the ECM/PCM.

19. Disconnect the jumper wire.

20. Reinstall the radiator fan relay.

21. Disconnect the radiator fan 2P connector.

22. Turn the ignition switch to ON (II), then set the A/C

button and fan control dial ON.

Terminal side of female terminals

Is ther e batter y voltage?

Do the A/ C condenser and r adiator f ans r un on
low?

08/08/21 14:42:26 61SNR030_210_0058

Content .. 482 483 484 485 ..