2019 Kia Sedona EXFACTORY OEM SERVICE PROCEDURE

Section 94 (Audio/Video/Navigation (AVN) System): Troubleshooting: Sound

WARNING: This page is about a different car, the 2020 Kia Sedona. However, it is still accessible from the selected car via links, so may be relevant.
  1. Features/Misdiagnose cases
    Inspection Description
    (1) System features
    1. Ignition ON (H/U → B+, ACC Power on), H/U Power ON → Sound for Radio, Media, Navigation, Voice Guidance.
    2. External amp is attached at the trunk. External amp communicates with H/U via CAN (Control Area Network)

      (* External amp location may vary)
    (2) Misdiagnose cases
    1. Mute or irregular sound might occur if customer have changed sound settings (position, tone, bass, middle, treble) (This is normal, yet misdiagnosed)
    2. Poor sound quality if low-quality soundtrack is played

      (Example: Application like I-MEPS will provide poor sound quality. Customers using BT stream to play I-MEPS claims H/U replacement for low sound quality)
  2. Sound output - Common
    Inspection Description
    (1) Vehicle modification
    1. Check vehicle modification (Front Panel, Black box, Mic, Taxi meter, etc.)
    (2) Duplicate issue
    1. Check sound/noise output
    2. Check H/U settings
    (3) Check H/U/Amp/Cable
    1. Check defect of 1) H/U, 2) amp, 3) connector defect in order (Ext. amp spec)
    2. Check defect of 1) H/U, 2) connector (For Internal amp)
    (4) Defect caused by Ext. parts N/A
    (5) Check part defect
    1. Check defect by replacing H/U
  3. Sound Output_ Noise (H/U_Ext. Amp)
    Inspection Procedure Description
    (1) Duplicate issue
    1. Check H/U Setting

      (Internal/External amp)
    G13046605Courtesy of KIA MOTORS AMERICA, INC.
    1. Check H/U Setting (Internal/External amp)
      1. Setting → Sound - Check position, tone settings
      2. Set position, tone to 'center'.

        →User may have changed settings to mute speakers

      3. Reset setting by pressing center button, then check sound
  4. 3. Sound Output_Noise (External AMP_Cable)
    Inspection Procedure Description
    (2) Inspect H/U/AMP/Cable
    1. AMP

      (External AMP)
    G13046606Courtesy of KIA MOTORS AMERICA, INC.
    1. Check AMP (External amp)
    1. Review defect

    (1) Check amp battery and ACC voltage (9V - 16V) → Vehicle issue if unable to read voltage
    (2) Check audio output → Amp issue if no audio output - Check speaker impedance → If not normal, check wire/cable, speaker (disconnect the cable and test)
    (2) Inspect H/U/AMP/Cable
    2. Cable
    (External amp)
    G13046607G13046608Courtesy of KIA MOTORS AMERICA, INC.KIA MOTORS AMERICA, INC.
    1. Check cable (External amp)
      1. AMP ↔ H/U Line inspection

    (1) MMCAN +/-: Check open/short using multi-meter
    (2) SPDIF +/-: Check open/short using multi-meter
    (3) NAVI +/-: Check open/short using multi-meter
    →Issue occurs (=Open) -> Cable wiring issue
    G13046607G13046608Courtesy of KIA MOTORS AMERICA, INC.KIA MOTORS AMERICA, INC.
    (2) Check cable connection
    3. Cable connection
    (Internal/External amp)
    G13046609G13046610G13046611Courtesy of KIA MOTORS AMERICA, INC.KIA MOTORS AMERICA, INC.KIA MOTORS AMERICA, INC.
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    When to See a Mechanic

    Stop DIY work and contact a certified mechanic immediately if any of the following apply:

    • • You smell fuel, burning insulation, or see smoke.
    • • Brakes feel soft, pull hard to one side, or make grinding noises.
    • • The engine overheats, stalls repeatedly, or misfires under load.
    • • You are missing required tools, torque specs, or safe lifting equipment.
    • • You are not confident in the next step or safety outcome.