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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 - Auxiliary input sound is low or cannot be heard(Without Navigation with Touch Screen) (2019 2020 2021 2022)

Audio System Symptom Troubleshooting - Auxiliary input sound is low or cannot be heard(Without Navigation with Touch Screen) (2019 2020 2021 2022)

Auxiliary input sound is low or cannot be heard 

NOTE: 

  1. Problem verification 1

    -1. Turn the vehicle to the ON mode.

    -2. Turn on the audio system, and connect an auxiliary accessory to the auxiliary input jack.

    Does the display change to the AUX mode?

    YES 

    Go to step 2.

    NO 

    The failure is duplicated, go to step 4.

  2. Problem verification 2

    -1. Check the auxiliary audio source sound.

    Is the sound normal?

    YES 

    Intermittent failure, the system is OK at this time.

    NO 

    The failure is duplicated, go to step 3.

  3. Determine possible failure area (auxiliary audio accessory, others)

    -1. Substitute a known-good auxiliary audio accessory and/or auxiliary stereo cable, and recheck.

    Is the sound normal?

    YES 

    Original auxiliary audio accessory or auxiliary stereo cable is faulty.

    NO 

    The failure is duplicated, go to step 9.

  4. Determine possible failure area (auxiliary jack assembly, others)

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

    -2. Disconnect the auxiliary accessory from the auxiliary input jack.

    -3. Disconnect the following connector.

    Auxiliary jack assembly 5P connector

    -4. Turn the vehicle to the ON mode.

    -5. Turn on the audio system.

    -6. Connect terminals A and B with a jumper wire.

    Terminal A Auxiliary jack assembly 5P connector No. 4 (YEL)
    Terminal B Auxiliary jack assembly 5P connector No. 5 (WHT)
    GHH461627Courtesy of HONDA, U.S.A., INC.

    Does the display change to the AUX mode?

    YES 

    Replace the auxiliary jack assembly .

    NO 

    Go to step 5.

  5. Determine possible failure area (AUX DET line, others)

    -1. Remove the jumper wire.

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

    Test condition Vehicle ON mode
      Auxiliary jack assembly 5P connector: disconnected
    Test circuit AUX DET
    Test point 1 Auxiliary jack assembly 5P connector No. 5 (WHT)
    Test point 2 Body ground
    GHH461628Courtesy of HONDA, U.S.A., INC.

    Is there about 3.0 V?

    YES 

    The AUX DET wire is OK. Go to step 7.

    NO 

    Go to step 6.

  6. Open wire check (AUX DET line)

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

    Test condition Vehicle ON mode
      Auxiliary jack assembly 5P connector: disconnected
    Test circuit AUX DET
    Test point 1 Audio unit connector C (20P) No. 16 (WHT)
    Test point 2 Body ground
    GHH461629Courtesy of HONDA, U.S.A., INC.

    Is there about 3.0 V?

    YES 

    Repair an open in the wire.

    NO 

    Replace the audio unit .

  7. Determine possible failure area (AUX GND line, others)

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

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

    Test condition Vehicle OFF (LOCK) mode
      Auxiliary jack assembly 5P connector: disconnected
    Test circuit AUX GND
    Test point 1 Auxiliary jack assembly 5P connector No. 4 (YEL)
    Test point 2 Body ground
    GHH461630Courtesy of HONDA, U.S.A., INC.

    Is there continuity?

    YES 

    Replace the audio unit .

    NO 

    Go to step 8.

  8. Open wire check (AUX GND line)

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

    Test condition Vehicle OFF (LOCK) mode
      Auxiliary jack assembly 5P connector: disconnected
    Test point 1 Audio unit connector C (20P) No. 6 (YEL)
    Test point 2 Body ground
    GHH461631Courtesy of HONDA, U.S.A., INC.

    Is there continuity?

    YES 

    Repair an open in the wire.

    NO 

    Replace the audio unit .

  9. Shorted wire check (AUX SGND, AUX R CH, AUX L CH lines)

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

    -2. Disconnect the auxiliary accessory from the auxiliary input jack.

    -3. Disconnect the following connectors.

    Audio unit connector C (20P)
    Auxiliary jack assembly 5P connector

    -4. Check for continuity between these test points and body ground individually.

    Test condition Vehicle OFF (LOCK) mode
      Audio unit connector C (20P): disconnected
      Auxiliary jack assembly 5P connector: disconnected
    Connector  Test circuit  Terminal 
    Audio unit connector C (20P) AUX SGND No. 8 (PNK)
    AUX R CH No. 17 (BLU)
    AUX L CH No. 18 (GRN)
    GHH461632Courtesy of HONDA, U.S.A., INC.

    Is there continuity?

    YES 

    There is a short to body ground in the wire(s). Replace the affected shielded harness.

    NO 

    The AUX SGND, AUX L CH, and AUX R CH wires are not shorted to ground. Go to step 10.

  10. Shorted wire check (SH AUX line to another lines)

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

    Test condition Vehicle OFF (LOCK) mode
      Audio unit connector C (20P): disconnected
      Auxiliary jack assembly 5P connector: disconnected
    Test circuit SH AUX, AUX L CH
    Test point 1 Audio unit connector C (20P) No. 7 (GRY)
    Test point 2 Audio unit connector C (20P) No. 18 (GRN)
    Test circuit SH AUX, AUX R CH
    Test point 1 Audio unit connector C (20P) No. 7 (GRY)
    Test point 2 Audio unit connector C (20P) No. 17 (BLU)
    GHH461633Courtesy of HONDA, U.S.A., INC.

    Is there continuity?

    YES 

    There is a short in the wires. Replace the affected shielded harness.

    NO 

    The SH AUX wire is OK. Go to step 11.

  11. Shorted wire check (AUX SGND line to another lines)

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

    Test condition Vehicle OFF (LOCK) mode
      Audio unit connector C (20P): disconnected
      Auxiliary jack assembly 5P connector: disconnected
    Test circuit AUX SGND, AUX L CH
    Test point 1 Audio unit connector C (20P) No. 8 (PNK)
    Test point 2 Audio unit connector C (20P) No. 18 (GRN)
    Test circuit AUX SGND, AUX R CH
    Test point 1 Audio unit connector C (20P) No. 8 (PNK)
    Test point 2 Audio unit connector C (20P) No. 17 (BLU)
    GHH461634Courtesy of HONDA, U.S.A., INC.

    Is there continuity?

    YES 

    There is a short in the wires. Replace the affected shielded harness.

    NO 

    The AUX SGND wire is not shorted. Go to step 12.

  12. Open wire check (AUX lines)

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

    Test condition Vehicle OFF (LOCK) mode
      Audio unit connector C (20P): disconnected
      Auxiliary jack assembly 5P connector: disconnected
    Test circuit  Test point 1:Audio unit connector C (20P)  Test point 2:Auxiliary jack assembly 5P connector 
    AUX SGND No. 8 (PNK) No. 3 (RED)
    AUX R CH No. 17 (BLU) No. 1 (BLK)
    AUX L CH No. 18 (GRN) No. 2 (WHT)
    GHH461635Courtesy of HONDA, U.S.A., INC.
    GHH461636Courtesy of HONDA, U.S.A., INC.

    Is there continuity?

    YES 

    The AUX wires are OK. Go to step 13.

    NO 

    There is an open in the wire(s). Repair or replace the affected harness.

  13. Auxiliary jack assembly check

    -1. Substitute a known-good auxiliary jack assembly .

    -2. Reconnect all the connectors, and recheck.

    Does the symptom go away?

    YES 

    Replace the original auxiliary jack assembly.

    NO 

    Replace the audio unit .

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