2020 Kia Optima Plug-In Hybrid EXFACTORY OEM SERVICE PROCEDURE

Power/Display Defect

  1. System features/Misdiagnose cases
    Inspection Description
    (1) System features
    1. IGN ON (H/U B+, ACC Power on), H/U Power must be ON. (Normal display - No lines, broken character, white screen)
    2. IGN OFF (B+, ACC Power off), H/U Power must be OFF (No power on/off by itself)
    (2) Misdiagnose cases
    1. Vehicle modification affects multimedia (Black box, custom navigation, custom mic)
    2. Battery is drained
    3. Multimedia switch is OFF on fuse box
  2. No power on
    Inspection Description
    (1) Duplicate issue
    1. Duplicate issue during IGN ON (BATT, ACC Power on) is it intermittent?
    → If unable to duplicate, proceed with test driving
    (2) External/Environmental issue
    • Vehicle modification
    • Cable connection
    		  
    1. Vehicle modification
      1. Custom Navigation installed/black box power on/Reception related modification
    2. Fuse box - Multimedia Fuse
      1. Check multimedia fuse in the fuse box

      → Replace fuse and re-test

    3. Main cable (Connection/Power)
    G13363698G13363699Courtesy of KIA MOTORS AMERICA, INC.KIA MOTORS AMERICA, INC.
    1. Check connection status of H/U main power (B)

      → If connection is loose or disabled, reconnect and check

    2. If connection status is normal, contact may be bad, So shake the cable and check

    → If defect is dependent on shaking cable, check cable and connector
    G13363698G13363699Courtesy of KIA MOTORS AMERICA, INC.KIA MOTORS AMERICA, INC.

    H/U Input power(Approx. 14.4V) (Yellow: B+, Red: ACC)→If no power, check cable connection
    →If power is good, replace H/U
    (3) TSB application
    1. Check related TSB, apply latest H/W and S/W
    (4) Check H/U defect
    1. Replace H/U
  3. Power does not turn off
    Inspection Description
    (1) Duplicate issue
    1. Duplicate issue during IGN ON (BATT, ACC Power on), is it intermittent?
    → If unable to duplicate, proceed with test driving
    (2) External/Environmental issue
    • Vehicle modification
    • Cable connection
    1. Vehicle modification
      1. Custom Navigation installed/black box power on/Reception related modification
    2. Main cable connection (Connection/Power)
    G13363700Courtesy of KIA MOTORS AMERICA, INC.
    H/U Power (Approx. 14.4V) (Yellow: B+, Red: ACC)→If no power, check cable connection→If power is good, replace H/U
    (3) TSB
    1. Check related TSB, apply latest H/W and S/W
    (4) Check H/U defect
    1. Replace H/U
  4. Power on/off by itself
    Inspection Description
    (1) Duplicate issue
    1. At Gear P, power on and see if problem duplicates
    2. Duplicate issue using steering wheel
    → If unable to duplicate, proceed with test driving
    (2) External/Environmental issue
    • Vehicle modification
    • Cable connection
    • Related parts
    		  
    1. Vehicle modification
      1. Custom Navigation installed/black box power on/Reception related modification
    2. Main cable (Connection/Power)
      1. Check connection status of H/U main power (B)

        → If connection is loose or disabled, reconnect and check

      2. If connection status is normal, contact may be bad, So shake the cable and check

      → If defect is dependent on shaking cable, check cable and connector

    3. Check related parts. (Handle remote controller, clock spring.)
    1. Rotate handle while the vehicle is not moving, and check defect

    → If defect is dependent on handle rotation, Check related parts.(Handle remote controller, clock spring.)→ If they have no problem, replace H/U(Foreign matter or internal defect is suspected) Defective clock spring and damaged cable has caused defect.
    * Clock spring: Electrical device to control handle remote controller switch and supply power to horn and air bag controller.
    G13363701G13363702Courtesy of 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.