Safety Warning
DIY auto repair can cause serious injury, fire, or vehicle damage. These guides are for informational purposes only. Always follow OEM torque specs, wear PPE, and consult a certified mechanic if you are unsure. You are solely responsible for your safety.
Unit Check: Display
This performs additional checks on the communication bus between the control unit and the display. In addition, the internal electronics and touch screen functionality are confirmed.
- When the connection is NG, first check for loose terminals at the navigation unit, the navigation display, the audio unit, and the CD changer connections. Next check for an open or short in the communication line between the navigation unit, the navigation display, the audio unit, and the CD changer. If you find the line to have an open or short, replace the affected shielded harness.
- If the ROM or RAM is NG, replace the navigation display.
- The version represents the software version in the display.
- Six CD connection checks the status of the connection between the CD changer and the audio unit. An NG represents an open in that circuit.
- Display Lid indicates if the front display panel is Open or Closed. This should always say, "Close".
Radio
If the NG is indicated, check for loose audio unit connectors.
NO RELATED
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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.