Audio System Symptom Troubleshooting - Audio system sound is weak or distorted (display is normal) (Without Navigation with Touch Screen) (2016 2017 2018 2019 2020 2021 2022)

Audio system sound is weak or distorted (display is normal)

NOTE:

Check the vehicle battery condition first .
Set the fader and the balance positions to the center.
Check the connectors for poor connections or loose terminals.

Problem verification
-1. Press the engine start/stop button to select the ON mode.

-2. Turn on the audio system, and check for sound in each mode (AM/FM, XM, or Bluetooth audio).

Is the sound weak or distorted in each mode?

YES: Sound is weak or distorted in all modes

The failure is duplicated, go to step 2.

YES: Sound is weak or distorted in AM/FM mode

Go to AM/FM radio display is blank or no station information is displayed troubleshooting .

YES: Sound is weak or distorted in XM mode

Go to Poor or no sound with XM radio (Audio unit does display XM channels) troubleshooting .

YES: Sound is weak or distorted in Bluetooth audio mode

Go to No sound when Bluetooth audio is used troubleshooting .

NO

Intermittent failure, the system is OK at this time.
Speaker output check
-1. Go into the System Diagnostic Mode, and use the speaker check mode .

Did speakers produce a tone only from left side or right side?

YES

Go to step 3.

NO

Go to step 7.

Shorted wire check (PRE lines)

-1. Press the engine start/stop button to select the OFF mode.

-2. Disconnect the following connectors.

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

Stereo amplifier connector B (28P)

Audio unit connector A (24P)

-3. Check for continuity between these test points and body ground individually.

Test condition	OFF mode
	Stereo amplifier connector B (28P): disconnected
	Audio unit connector A (24P): disconnected

Connector	Test circuit	Terminal
Audio unit connector A (24P)	FL PRE+	No. 15 (BRN)
	FL PRE-	No. 16 (YEL)
	FR PRE+	No. 19 (GRN)
	FR PRE-	No. 20 (RED)

Courtesy of HONDA, U.S.A., INC.

Is there continuity?

YES

Repair a short to body ground in the wires between the audio unit and the stereo amplifier.

The PRE wires are not shorted to ground. Go to step 4.

Shorted wire check (PRE+ lines to PRE- lines)

-1. Check for continuity between test points 1 and 2.

Test condition	OFF mode
	Stereo amplifier connector B (28P): disconnected
	Audio unit connector A (24P): disconnected

Test circuits	Connector: Audio unit connector A (24P)
Test circuits	Test point 1	Test point 2
FL PRE+ to FL PRE-	No. 15 (BRN)	No. 16 (YEL)
FR PRE+ to FR PRE-	No. 19 (GRN)	No. 20 (RED)

Courtesy of HONDA, U.S.A., INC.

Is there continuity?

YES

Repair a short in the wires between the audio unit and the stereo amplifier.

The PRE+ and the PRE- wires are not shorted. Go to step 5.

Open wire check (PRE lines)

-1. Check for continuity between test points 1 and 2.

Test condition	OFF mode
	Stereo amplifier connector B (28P): disconnected
	Audio unit connector A (24P): disconnected

Test circuit	Test point 1:Audio unit connector A (24P)	Test point 2:Stereo amplifier connector B (28P)
FL PRE+	No. 15 (BRN)	No. 9 (BRN)
FL PRE-	No. 16 (YEL)	No. 23 (YEL)
FR PRE+	No. 19 (GRN)	No. 8 (GRN)
FR PRE-	No. 20 (RED)	No. 22 (RED)

Courtesy of HONDA, U.S.A., INC.

Courtesy of HONDA, U.S.A., INC.

Is there continuity

YES

The PRE wires are OK. Go to step 6.

Repair an open in the wire(s) between the audio unit and the stereo amplifier.

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 unit .

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

-1. Press the engine start/stop button to select the OFF 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	OFF mode
	Stereo amplifier connector A (18P): disconnected

Connector	Test circuit	Terminal
Stereo amplifier connector A (18P)	FL SPKR+	No. 5 (LT GRN)
	FL SPKR	No. 6 (PNK)
	FL TWEETER+	No. 14 (RED)
	FL TWEETER-	No. 15 (PNK)
	FR SPKR+	No. 13 (GRY)
	FR SPKR	No. 2 (BRN)
	FR TWEETER+	No. 16 (WHT)
	FR TWEETER-	No. 17 (PUR)
	RL SPKR+	No. 10 (YEL)
	RL SPKR	No. 9 (BRN)
	RR SPKR+	No. 8 (BLU)
	RR SPKR	No. 7 (ORN)
	SUB WOOFER+	No. 2 (GRN)
	SUB WOOFER	No. 4 (RED)

Courtesy of HONDA, U.S.A., INC.

Is there continuity?

YES

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

The SPKR wires, the TWEETER wires, and the SUB WOOFER wires are not shorted to ground. Go to step 8.

Determine possible failure area (SPKR lines, TWEETER lines, SUB WOOFER lines, others)

-1. Measure the resistance between test points 1 and 2.

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

Test circuits	Test point 1:Stereo amplifier connector A (18P)	Test point 2:Stereo amplifier connector A (18P)	Resistance
FL SPKR+, FL SPKR	No. 5 (LT GRN)	No. 6 (PNK)	About 2 '
FR SPKR+, FR SPKR	No. 13 (GRY)	No. 2 (BRN)	About 2 '
FL TWEETER+, FL TWEETER-	No. 14 (GRY)	No. 15 (PNK)	About 3.3 '
FR TWEETER+, FR TWEETER-	No. 16 (WHT)	No. 17 (PUR)	About 3.3 '
RL SPKR+, RL SPKR	No. 10 (YEL)	No. 9 (BRN)	About 2 '
RR SPKR+, RR SPKR	No. 8 (BLU)	No. 7 (ORN)	About 2 '
SUB WOOFER+, SUB WOOFER	No. 2 (GRN)	No. 4 (RED)	About 2 '

Courtesy of HONDA, U.S.A., INC.

Is the resistance OK?

YES

Go to step 10.

Go to step 9.

Speaker check
-1. Test the speaker on the faulty speaker lines .

Is the speaker OK?

YES

Repair faulty speaker wire(s) between the stereo amplifier and the speaker(s).

NO

Replace the speaker .
Speaker visual check
-1. Remove the speaker that is duplicating the failure, and check the speaker for any damage.

Is there any damage?

YES

Replace the faulty speaker .

NO

Replace the stereo amplifier .