Audio System Symptom Troubleshooting - No sound is heard from the speaker(s) (display is normal) (With Navigation and Stereo Amplifier) | 2012-2016 CR-V RM1/RM4,RE5/RE6 HONDA CR-V Service Manual

1.

Problem verification:

Problem verification

?1.	Turn the vehicle to the ON mode.

?2.	Turn on the audio system, and check for sound in each mode (AM/FM and CD).

Is the sound OK in each mode?


	YES

Intermittent failure, the system is OK at this time. Check for loose connections at the audio-navigation unit and speaker(s).?


	NO: No sound is heard in all modes

The failure is duplicated in all modes, go to step 2.


	NO: No sound is heard in AM/FM mode

Go to Poor AM or FM radio reception interference troubleshooting.?


	NO: No sound is heard in CD mode

Go to Audio disc does not play troubleshooting.?

2.

Determine possible failure area (volume level, others):

Determine possible failure area (volume level, others)

?1.	Check that the volume is not set to the MIN level.

Is it at the MIN level?


	YES

Raise the volume level, and recheck the function.?


	NO

Go to step 3.

3.

Determine possible failure area (audio-navigation unit, others):

Determine possible failure area (audio-navigation unit, others)

?1.	Go into the System Diagnostic Mode, and use the Speaker Check diagnosis to check the speakers.

Did all speakers produce a tone?


	YES

Replace the audio-navigation unit.?


	NO: No sound is heard from all the speakers

Go to step 4.


	NO: No sound is heard from some of the speaker(s)

Go to step 11.

4.

Fuse check:

Fuse check

?1.	Turn the vehicle to the OFF (LOCK) mode.

?2.

Check the following fuses.

Fuse	No. A13 (20 A)
Location	Under-hood fuse/relay box

Is the fuse OK?


	YES

Go to step 5.


	NO

Replace the fuse, and recheck. If the fuse blows again, check for a short in the No. A13 (20 A) fuse circuit.?

5.

Open wire check (+B AUDIO AMP line):

Open wire check (+B AUDIO AMP line)

?1.

Measure the voltage between test points 1 and 2.

Test condition	Vehicle OFF (LOCK) mode

Test point 1	Stereo amplifier connector A (18P) No. 3
Test point 2	Body ground

Is there battery voltage?


	YES

The +B AUDIO AMP wire is OK. Go to step 6.


	NO

Repair an open in the wire between the No. A13 (20 A) fuse in the under-hood fuse/relay box and the stereo amplifier.?

6.

Open wire check (GND line):

Open wire check (GND line)

?1.	Turn the vehicle to the ON mode.

?2.

Measure the voltage between test points 1 and 2.

Test condition	Vehicle ON mode

Test point 1	Stereo amplifier connector A (18P) No. 1
Test point 2	Body ground

Is there less than 0.2 V?


	YES

The GND wire is OK. Go to step 7.


	NO

Repair an open in the wire between the stereo amplifier and body ground: (G503).?

7.

Determine possible failure area (SWD+B line, others):

Determine possible failure area (SWD+B line, others)

?1.	Turn the vehicle to the ON mode.

?2.

Measure the voltage between test points 1 and 2.

Test condition	Vehicle ON mode


Test point 1	Stereo amplifier connector B (24P) No. 13
Test point 2	Body ground

Is there battery voltage?


	YES

The SWD+B wire is OK. Go to step 8.


	NO

Go to step 9.

8.

Stereo amplifier check (substitution):

Stereo amplifier check (substitution)

?1.	Turn the vehicle to the OFF (LOCK) mode.

?2.	Substitute a known-good stereo amplifier.

Does the symptom go away?


	YES

Replace the original stereo amplifier.?


	NO

Replace the audio-navigation unit.?

9.

Open wire check (SWD+B line):

Open wire check (SWD+B line)

?1.

Measure the voltage between test points 1 and 2.

Test condition	Vehicle ON mode


Test point 1	Audio-navigation unit connector A (24P) No. 21
Test point 2	Body ground

Is there battery voltage?


	YES

Repair an open in the wire between the stereo amplifier and the audio-navigation unit.?


	NO

The SWD+B wire is not open. Go to step 10.

10.

Shorted wire check (SWD+B line):

Shorted wire check (SWD+B line)

?1.	Turn the vehicle to the OFF (LOCK) mode.

?2.

Disconnect the following connectors.

NOTE: Eject the disc before disconnecting the audio-navigation unit to prevent damaging the CD player's load mechanism.

Audio-navigation unit connector A (24P)

Stereo amplifier connector B (24P)

?3.

Check for continuity between test points 1 and 2.

Test condition	Vehicle OFF (LOCK) mode

	Audio-navigation unit connector A (24P): disconnected
	Stereo amplifier connector B (24P): disconnected
Test point 1	Audio-navigation unit connector A (24P) No. 21
Test point 2	Body ground

Is there continuity?


	YES

Repair a short in the wire between the stereo amplifier and the audio-navigation unit.?


	NO

Replace the audio-navigation unit.?

11.

Shorted wire check (SPKR lines, TWEETER lines, SUB WOOFER lines):

Shorted wire check (SPKR lines, TWEETER lines, SUB WOOFER lines)

?1.	Turn the vehicle to the OFF (LOCK) mode.

?2.

Disconnect the following connector.

Stereo amplifier connector A (18P)

?3.

Check for continuity between these test points and body ground individually.

Test condition	Vehicle OFF (LOCK) mode
	Stereo amplifier connector A (18P): disconnected

Connector	Terminal
Stereo amplifier connector A (18P)	No. 13
	No. 6
	No. 12
	No. 5
	No. 14
	No. 7
	No. 15
	No. 8
	No. 16
	No. 9
	No. 17
	No. 10
	No. 4
	No. 2

Is there continuity?


	YES

Repair a short to body ground in the wire(s) between the stereo amplifier and the speaker(s).?


	NO

The SPKR, the TWEETER, and the SUB WOOFER wires are not shorted to ground. Go to step 12.

12.

Determine possible failure area (speaker, others) 1:

Determine possible failure area (speaker, others) 1

?1.	Check the speaker(s) with no sound for any damage.

Is there any damage?


	YES

Replace the faulty speaker(s).?


	NO

Go to step 13.

13.

Determine possible failure area (speaker, others) 2:

Determine possible failure area (speaker, others) 2

?1.	Test the speaker(s).

Is the speaker(s) OK?


	YES

Go to step 14.


	NO

Replace the faulty speaker(s).?

14.

Open wire check (SPKR lines, TWEETER lines, SUB WOOFER lines):

Open wire check (SPKR lines, TWEETER lines, SUB WOOFER lines)

?1.	Reconnect the front door speaker 2P connector(s), the tweeter 2P connector, the rear speaker 2P connector(s), and the subwoofer 2P connector.

?2.

Measure the resistance between test points 1 and 2.

Test condition	Vehicle OFF (LOCK) mode
	Stereo amplifier connector A (18P): disconnected

Test point 1: Stereo amplifier connector A (18P)	Test point 2: Stereo amplifier connector A (18P)	Resistance
No. 13	No. 6	About 4 ?
No. 12	No. 5	About 4 ?
No. 14	No. 7	About 4 ?
No. 15	No. 8	About 4 ?
No. 16	No. 9	About 4 ?
No. 17	No. 10	About 4 ?
No. 4	No. 2	About 2 ?

Is the resistance OK?


	YES

The SPKR, the TWEETER, and the SUB WOOFER wires are OK. Go to step 15.


	NO

Repair an open in the wire between the stereo amplifier and the speaker(s).?

15.

Open wire check (PRE lines):

Open wire check (PRE lines)

?1.

Disconnect the following connectors.

NOTE: Eject the disc before disconnecting the audio-navigation unit to prevent damaging the CD player's load mechanism.

Stereo amplifier connector B (24P)

Audio-navigation unit connector A (24P)

Audio-navigation unit connector B (8P)

?2.

Check for continuity between test points 1 and 2.

Test condition	Vehicle OFF (LOCK) mode
	Stereo amplifier connector A (18P): disconnected
	Stereo amplifier connector B (24P): disconnected
	Audio-navigation unit connector A (24P): disconnected
	Audio-navigation unit connector B (8P): disconnected

Test point 1: Audio-navigation unit connector A (24P)	Test point 2: Stereo amplifier connector B (24P)
No. 15	No. 23
No. 16	No. 11
No. 19	No. 20
No. 20	No. 8
No. 5	No. 21
No. 6	No. 9
No. 9	No. 18
No. 10	No. 6

Test point 1: Audio-navigation unit connector B (8P)	Test point 2: Stereo amplifier connector B (24P)
No. 5	No. 17
No. 7	No. 5

Is there continuity?


	YES

The PRE wires are not open. Go to step 16.


	NO

There is an open in the wire(s) between the audio-navigation unit and the stereo amplifier. Replace the affected shielded harness.?

16.

Shorted wire check (PRE lines):

Shorted wire check (PRE lines)

?1.

Check for continuity between these test points and body ground individually.

Test condition	Vehicle OFF (LOCK) mode
	Stereo amplifier connector A (18P): disconnected
	Stereo amplifier connector B (24P): disconnected
	Audio-navigation unit connector A (24P): disconnected
	Audio-navigation unit connector B (8P): disconnected

Connector	Terminal
Audio-navigation unit connector A (24P)	No. 15
	No. 16
	No. 19
	No. 20
	No. 5
	No. 6
	No. 9
	No. 10

Connector	Terminal
Audio-navigation unit connector B (8P)	No. 5
Audio-navigation unit connector B (8P)	No. 7

Is there continuity?


	YES

There is a short to body ground in the wire(s) between the stereo amplifier and the audio-navigation unit. Replace the affected shielded harness.?


	NO

The PRE wires are not shorted to ground. Go to step 17.

17.

Shorted wire check (SH PRE line to another lines)

?1.

Check for continuity between test points 1 and 2.

Test condition	Vehicle OFF (LOCK) mode
	Stereo amplifier connector A (18P): disconnected
	Stereo amplifier connector B (24P): disconnected
	Audio-navigation unit connector A (24P): disconnected
	Audio-navigation unit connector B (8P): disconnected

Test point 1 Audio-navigation unit connector A (24P)	Test points 2 Audio-navigation unit connector A (24P)
No. 17	No. 15, No. 16
No. 18	No. 19, No. 20
No. 7	No. 5, No. 6
No. 8	No. 9, No. 10

Test point 1 Audio-navigation unit connector B (8P)	Test points 2 Audio-navigation unit connector B (8P)
No. 6	No. 5, No. 7

Is there continuity between any of the terminals?


	YES

There is a short in the wires between the stereo amplifier and the audio-navigation unit. Replace the affected shielded harness.?


	NO

The SH PRE wires and the PRE wires are OK. Go to step 18.

18.

Stereo amplifier check (substitution):

Stereo amplifier check (substitution)

?1.	Substitute a known-good stereo amplifier.

?2.	Reconnect all the connectors, and recheck.

Does the symptom go away?


	YES

Replace the original stereo amplifier.?


	NO

Replace the audio-navigation unit.?