Acura CSX. Manual — part 579

＊０２

＊０３

＊０４

＋

＋

＋

＋

−

−

−

−

−

−

−

−

YES

NO

YES

NO

YES

NO

YES

NO

23-33

AM/FM ANTENNA AMPLIFIER 3P CONNECTOR

ANT

B

AM/FM ANTENNA AMPLIFIER 3P CONNECTOR

ANT

B

AUDIO UNIT CONNECTOR G (3P)

AM/FM ANTENNA AMPLIFIER 3P CONNECTOR

ANT

B

ANT

B

10. Remove the audio unit (see page 23-80). Check that

the antenna lead is properly connected.

Go to step 10.

Reconnect the connector, and recheck the

function.

11. Disconnect the antenna cable 3P connector from

the AM/FM antenna amplifier (see page 23-87).

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

13. Turn on the audio unit.

14. Measure the voltage between the AM/FM antenna

lead connector terminal No. 3 at the AM/FM
antenna amplifier and body ground.

Go to step 19.

Go to step 15.

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

16. Disconnect audio unit connector G (3P).

17. Check for continuity between the AM/FM antenna

amplifier connector (3P) terminal No. 3 and body
ground.

Repair short to body ground in the wire

between the audio unit and the AM/FM antenna
amplifier.

Go to step 18.

18. Check for continuity between audio unit connector

G (3P) terminal No. 3 and the AM/FM antenna
amplifier 3P connector terminal No. 3.

Substitute a known-good audio unit

(see page 23-80), and recheck.

Repair open in the wire between the audio

unit and the AM/FM antenna amplifier.

Terminal side of female terminals

Terminal side of female terminals

Terminal side of female terminals

Terminal side of female terminals

Is it connected pr oper ly?

Is ther e batter y voltage?

Is ther e continuity?

Is ther e continuity?

08/08/21 14:04:39 61SNR030_230_0036

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＊０７

＊０８

−

−

−

−

−

−

−

−

YES

NO

YES

NO

YES

NO

YES

NO

23-34

Audio System

AUDIO UNIT CONNECTOR G (3P)

RF IN

AUDIO UNIT CONNECTOR G (3P)

RF IN

RF SH

AUDIO UNIT CONNECTOR G (3P)

AM/FM ANTENNA AMPLIFIER 3P CONNECTOR

RF SH

RF SH

AUDIO UNIT CONNECTOR G (3P)

AM/FM ANTENNA AMPLIFIER 3P CONNECTOR

RF IN

RF IN

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

20. Disconnect audio connector G (3P).

21. Check for continuity between audio unit connector

G (3P) terminal No. 1 and body ground.

Replace the antenna lead and/or sublead.

Go to step 22.

22. Check for continuity between audio unit connector

G (3P) terminals No. 1 and No. 2.

Replace the antenna lead and/or sublead.

Go to step 23.

23. Check for continuity between audio unit connector

G (3P) terminal No. 2 and the AM/FM antenna
amplifier 3P connector terminal No. 2.

Replace the antenna lead and/or sublead.

Go to step 24.

24. Check for continuity between audio unit connector

G (3P) terminal No. 1 and the AM/FM antenna
amplifier 3P connector terminal No. 1.

Replace the AM/FM antenna amplifier

(see page 23-87), and recheck. If the reception is
still poor, replace the audio unit (see page 23-80).

Replace the antenna lead and/or sublead.

Terminal side of female terminals

Terminal side of female terminals

Terminal side of female terminals

Terminal side of female terminals

Terminal side of female terminals

Terminal side of female terminals

Is ther e continuity?

Is ther e continuity?

Is ther e continuity?

Is ther e continuity?

08/08/21 14:04:39 61SNR030_230_0037

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＋

−

−

−

−

−

−

−

−

Audio unit power switch will not turn on (No
information display and no sound) (with
navigation)

YES

NO

YES

NO

YES

NO

YES

NO

23-35

NAVIGATION UNIT CONNECTOR A (17P)

B BACK UP (WHT)

ACC RADIO (PUR)

NOTE:

• Check the vehicle battery condition first.
• Check the connectors for poor connections or loose

terminals.

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

2. Push the power switch ON to see if the navigation

unit turns ON.

Intermittent failure, the system is OK at this

time.

Go to step 3.

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

4. Check the No. 23 (10 A) fuse in the under-hood

fuse/relay box and No. 35 (7.5 A) fuse in the under-
dash fuse/relay box.

Go to step 5.

Replace the fuse(s), and recheck.

5. Remove the navigation unit (see page 23-155).

Check that the navigation unit is properly
connected.

NOTE:

• Eject all the discs before removing the navigation

unit to prevent damaging the CD player’s load
mechanism.

• Remove the PC card before removing the

navigation unit.

Go to step 6.

Reconnect the connector, and recheck the

function.

6. Disconnect navigation unit connector A (17P)

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

8. Measure the voltage between body ground and

navigation unit connector A (17P) terminals No. 14
and No. 17 individually.

Go to step 9.

Repair open in the wire(s) between the No. 23

(10 A) fuse in the under-hood fuse/relay box and
the No. 35 (7.5 A) in the under-dash fuse/relay box
and the navigation unit.

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

10. Reconnect navigation unit connector A (17P).

Wire side of female terminals

Does the navigation unit display oper ate pr oper ly,
and does the audio sound nor mal?

Ar e the f uses OK ?

Is it connected pr oper ly?

Is ther e batter y voltage on both ter minals?

08/08/21 14:04:39 61SNR030_230_0038

＊１０

ＳＮＲ９ＡＮＪＪ１０３００００００００ＦＡＡＴ０５

−

−

−

−

−

−

−

−

YES

NO

YES

NO

YES

NO

YES

NO

Audio unit power switch will not turn on (No
information display and no sound) (without
navigation)

23-36

23-36

Audio System

RADIO GND (BLK)

NAVIGATION UNIT CONNECTOR A (17P)

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

12. Measure the voltage between navigation unit

connector A (17P) terminal No. 9 and body ground.

Replace the navigation unit (see page 23-155).

Repair open in the wire between navigation

unit connector A (17P) terminal No. 19 and body
ground (G505).

NOTE:

• Check the vehicle battery condition first.
• Check the connectors for poor connections or loose

terminals.

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

2. Push the power switch ON to see if audio unit turns

ON.

Intermittent failure, the system is OK at this

time.

Go to step 3.

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

4. Check the No. 23 (10 A) fuse in the under-hood

fuse/relay box and the No. 35 (7.5 A) fuse in the
under-dash fuse/relay box.

Go to step 5.

Replace the fuse(s), and recheck.

5. Remove the audio unit (see page 23-80). Check that

the audio unit is properly connected.

NOTE: Eject all the discs before removing the audio
unit to prevent damaging the CD player’s load
mechanism.

Go to step 6.

Reconnect the connector, and recheck the

function.

Wire side of female terminals

Is ther e less than 0.1 V on both ter minals?

Does the audio unit oper ate pr oper ly, and does the
audio sound nor mal?

Ar e the f uses OK ?

Is it connected pr oper ly?

08/08/21 14:04:40 61SNR030_230_0039