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.
Factory Diagnostic Screen In Line Diag
If the vehicle left the factory in the factory diagnostic mode, you will see this screen every time you turn the vehicle to the ON mode. Sometimes this screen also appears after you replace the audio unit with a new or remanufactured unit.
When the audio unit is powered up for the first time at the factory or a remanufactured audio unit is installed, the factory diagnosis screen (In Line Diag) appears. Normally the factory does the steps necessary to verify proper operation and terminate the factory diagnosis. Until the proper confirmation sequence is done, the screen appears every time you turn the vehicle to the ON mode.
Follow these steps to prevent the screen from appearing in the future:
1. Press and hold the INFO button, the SETTING button, and the BACK button for about 3 seconds. Then Select Diagnosis Items screen appears.
2. Press and hold the SETTING button until the In Line Diag Setting screen appears.
3. Set the In Line Diag Setting to Complete, then select Return twice to exit the diagnostic mode. The In Line Diag should not appear again.
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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.