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.
Navigation System Symptom Troubleshooting - Audio-navigation unit illumination does not work (2016 2017 2018)
Audio-navigation unit illumination does not work
NOTE:
- Check the vehicle 12 volt battery condition first .
- Check for B-CAN DTCs and resolve them before troubleshooting.
- Check the connectors for poor connections or loose terminals.
- Problem verification
-1. Turn the vehicle to the ON mode.
-2. Turn the combination lighting switch to the parking light position (
).
-3. Check if the audio-navigation unit are illuminated.
Are the audio-navigation unit illuminated?
YES
Intermittent failure, the audio-navigation unit is OK at this time.
NO
The failure is duplicated, go to step 2.
- Determine possible failure area (interior lights circuit, others)
-1. Check if several other buttons that are not related to the audio system are illuminated.
Are the buttons illuminated?
YES
Go to step 3.
NO
Troubleshoot the interior lights.
- Determine possible failure area (audio-navigation unit, others)
-1. Go into the System Diagnostic Mode, and use the Vehicle Status to check the ILL (Illumination) .
Does the ILL signal change from [0] to [1] when the combination light switch is turned to the parking light position (
YES
Replace the audio-navigation unit .
NO
Go to step 4.
- Open wire check (B-CAN_H, B-CAN_L lines)
-1. Turn the combination lighting switch off.
-2. Turn the vehicle to the OFF (LOCK) mode.
-3. Disconnect the following connectors.
Gauge control module 32P connector Audio-navigation unit connector B (20P) -4. Check for continuity between test points 1 and 2.
Test condition Vehicle OFF (LOCK) mode Gauge control module 32P connector: disconnected Audio-navigation unit connector B (20P): disconnected Test circuit 1 Test point 1 Gauge control module 32P connector No. 23 Test point 2 Audio-navigation unit connector B (20P) No. 13 Test circuit 2 Test point 1 Gauge control module 32P connector No. 24 Test point 2 Audio-navigation unit connector B (20P) No. 3 Is there continuity?
YES
Replace the audio-navigation unit .
NO
Repair an open in the wire(s) between the audio-navigation unit and the gauge control module.
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.