LEMON Manuals: Even more car manuals for everyone
Home >> Acura >> 2020 >> ILX >> Repair and Diagnosis >> Accessories & Equipment >> Infotainment >> Audio System - Symptom Troubleshooting (1 Of 2) (Except Hybrid) >> Symptom Troubleshooting >> Audio System Symptom Troubleshooting - Audio system sound is weak or distorted (display is normal) (With Navigation) (2016 2017 2018 2019 2020 2021 2022)

Audio System Symptom Troubleshooting - Audio system sound is weak or distorted (display is normal) (With Navigation) (2016 2017 2018 2019 2020 2021 2022)

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

NOTE: 

  1. 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, AUX, 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 AUX mode

    Go to Auxiliary input sound is low or cannot be heard 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.

  2. Speaker output check

    -1. Go into the System Diagnostic Mode, and use the speaker check mode .

    Did all speakers produce a tone normally?

    YES 

    Go to step 4.

    NO 

    Go to step 3.

  3. 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 8.

    NO 

    Go to step 12.

  4. Shorted wire check (PRE ELS 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-navigation unit to prevent damaging the CD/DVD player's load mechanism.

    Stereo amplifier connector B (28P)
    Audio-navigation unit connector A (24P)
    Audio-navigation unit connector B (8P)

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

    Test condition OFF mode
      Stereo amplifier connector B (28P): disconnected
      Audio-navigation unit connector A (24P): disconnected
      Audio-navigation unit connector B (8P): disconnected
    Connector  Test circuit  Terminal 
    Audio-navigation unit connector A (24P) RL PRE+ ELS No. 5 (YEL)
    RL PRE- ELS No. 6 (PUR)
    RR PRE+ ELS No. 9 (ORN)
    RR PRE- ELS No. 10 (BLU)
    Connector  Test circuit  Terminal 
    Audio-navigation unit connector B (8P) CTR PRE+ No. 1 (BLK)
    CTR PRE- No. 3 (WHT)
    SUB W PRE+ ELS No. 5 (GRN)
    SUB W PRE- ELS No. 7 (RED)
    GHH461542Courtesy of HONDA, U.S.A., INC.
    GHH461543Courtesy of HONDA, U.S.A., INC.

    Is there continuity?

    YES 

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

    NO 

    The PRE ELS wires are not shorted to ground. Go to step 5.

  5. Shorted wire check (PRE+ ELS lines to PRE- ELS lines)

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

    Test condition OFF mode
      Stereo amplifier connector B (28P): disconnected
      Audio-navigation unit connector A (24P): disconnected
      Audio-navigation unit connector B (8P): disconnected
    Test circuits  Connector: Audio-navigation unit connector A (24P) 
    Test point 1  Test point 2 
    RL PRE+ ELS to RL PRE- ELS No. 5 (YEL) No. 6 (PUR)
    RR PRE+ ELS to RR PRE- ELS No. 9 (ORN) No. 10 (BLU)
    Test circuits  Connector: Audio-navigation unit connector B (8P) 
    Test point 1  Test point 2 
    CTR PRE+ to CTR PRE- No. 1 (BLK) No. 3 (WHT)
    SUB W PRE+ ELS to SUB W PRE- ELS No. 5 (GRN) No. 7 (RED)
    GHH461544Courtesy of HONDA, U.S.A., INC.
    GHH461545Courtesy of HONDA, U.S.A., INC.

    Is there continuity?

    YES 

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

    NO 

    The PRE+ ELS and the PRE- ELS wires are not shorted. Go to step 6.

  6. Open wire check (PRE ELS lines)

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

    Test condition OFF mode
      Stereo amplifier connector B (28P): disconnected
      Audio-navigation unit connector A (24P): disconnected
      Audio-navigation unit connector B (8P): disconnected
    Test circuit  Test point 1:Audio-navigation unit connector A (24P)  Test point 2:Stereo amplifier connector B (28P) 
    RL PRE+ ELS No. 5 (YEL) No. 7 (YEL)
    RL PRE- ELS No. 6 (PUR) No. 21 (PUR)
    RR PRE+ ELS No. 9 (ORN) No. 6 (ORN)
    RR PRE- ELS No. 10 (BLU) No. 20 (BLU)
    Test circuit  Test point 1:Audio-navigation unit connector B (8P)  Test point 2:Stereo amplifier connector B (28P) 
    CTR PRE+ No. 1 (BLK) No. 11 (BLK)
    CTR PRE- No. 3 (WHT) No. 25 (WHT)
    SUB W PRE+ ELS No. 5 (GRN) No. 10 (GRN)
    SUB W PRE- ELS No. 7 (RED) No. 24 (RED)
    GHH461546Courtesy of HONDA, U.S.A., INC.
    GHH461547Courtesy of HONDA, U.S.A., INC.
    GHH461548Courtesy of HONDA, U.S.A., INC.

    Is there continuity

    YES 

    The PRE ELS wires are OK. Go to step 7.

    NO 

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

  7. 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 .

  8. Shorted wire check (PRE ELS 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-navigation unit to prevent damaging the CD player's load mechanism.

    Stereo amplifier connector B (28P)
    Audio-navigation 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-navigation unit connector A (24P): disconnected
    Connector  Test circuit  Terminal 
    Audio-navigation unit connector A (24P) FL PRE+ ELS No. 15 (WHT)
    FL PRE- ELS No. 16 (BLK)
    FR PRE+ ELS No. 19 (RED)
    FR PRE- ELS No. 20 (GRN)
    GHH461549Courtesy of HONDA, U.S.A., INC.

    Is there continuity?

    YES 

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

    NO 

    The PRE ELS wires are not shorted to ground. Go to step 9.

  9. Shorted wire check (PRE+ ELS lines to PRE- ELS lines)

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

    Test condition OFF mode
      Stereo amplifier connector B (28P): disconnected
      Audio-navigation unit connector A (24P): disconnected
    Test circuits  Connector: Audio-navigation unit connector A (24P) 
    Test point 1  Test point 2 
    FL PRE+ ELS to FL PRE- ELS No. 15 (WHT) No. 16 (BLK)
    FR PRE+ ELS to FR PRE- ELS No. 19 (RED) No. 20 (GRN)
    GHH461550Courtesy of HONDA, U.S.A., INC.

    Is there continuity?

    YES 

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

    NO 

    The PRE+ ELS and the PRE- ELS wires are not shorted. Go to step 10.

  10. Open wire check (PRE ELS lines)

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

    Test condition OFF mode
      Stereo amplifier connector B (28P): disconnected
      Audio-navigation unit connector A (24P): disconnected
    Test circuit  Test point 1:Audio-navigation unit connector A (24P)  Test point 2:Stereo amplifier connector B (28P) 
    FL PRE+ ELS No. 15 (WHT) No. 9 (WHT)
    FL PRE- ELS No. 16 (BLK) No. 23 (BLK)
    FR PRE+ ELS No. 19 (RED) No. 8 (RED)
    FR PRE- ELS No. 20 (GRN) No. 22 (GRN)
    GHH461551Courtesy of HONDA, U.S.A., INC.
    GHH461552Courtesy of HONDA, U.S.A., INC.

    Is there continuity

    YES 

    The PRE ELS wires are OK. Go to step 11.

    NO 

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

  11. 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 .

  12. 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 connectors.

    Stereo amplifier connector A (18P)
    Stereo amplifier connector C (8P)

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

    Test condition OFF mode
      Stereo amplifier connector A (18P): disconnected
      Stereo amplifier connector C (8P): 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)
    CTR SPKR+ No. 11 (PUR)
    CTR SPKR- No. 18 (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)
    Connector  Test circuit  Terminal 
    Stereo amplifier connector C (8P) SATL TWEETER+ No. 3 (GRY)
    SATL TWEETER- No. 4 (ORN)
    SATR TWEETER+ No. 1 (YEL)
    SATR TWEETER- No. 2 (WHT)
    GHH461558Courtesy of HONDA, U.S.A., INC.
    GHH461559Courtesy 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.

    NO 

    The SPKR wires, the TWEETER wires, and the SUB WOOFER wires are not shorted to ground. Go to step 13.

  13. 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 6 '->Infinity
    FR TWEETER+, FR TWEETER- No. 16 (WHT) No. 17 (PUR) About 6 '->Infinity
    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 '
    Test circuits  Test point 1:Stereo amplifier connector C (8P)  Test point 2:Stereo amplifier connector C (8P)  Resistance 
    SATL TWEETER+, SATL TWEETER- No. 3 (GRY) No. 4 (ORN) About 4 '
    SATR TWEETER+, SATR TWEETER- No. 1 (YEL) No. 2 (WHT) About 4 '
    GHH461565Courtesy of HONDA, U.S.A., INC.

    Is the resistance OK?

    YES 

    Go to step 15.

    NO 

    Go to step 14.

  14. 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 .

  15. 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 .

scientia non olet · About LEMON Manuals