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.
Center switch panel button illumination does not work
NOTE:
- Check the vehicle battery condition first .
- Check the connectors for poor connections or loose terminals.
- Problem verification
-1. Turn the vehicle to the ON mode.
-2. Turn the combination light switch to the parking light position.
-3. Check if the navigation switch panel buttons are illuminated.
Are the buttons illuminated?
YES
Intermittent failure, the system 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.
- Open wire check (ILLUMI+ line)
-1. Turn the combination light switch off.
-2. Turn the vehicle to the OFF (LOCK) mode.
-3. Disconnect the following connector.
Center switch panel 5P connector -4. Turn the vehicle to the ON mode.
-5. Turn the combination light switch to the parking light position.
-6. Measure the voltage between test points 1 and 2.
Test condition Vehicle ON mode Test circuit ILLUMI+ Test point 1 Center switch panel 5P connector No. 1 (YEL) Test point 2 Body ground Is there battery voltage?
YES
The ILLUMI+ wire is OK. Go to step 4.
NO
Repair an open in the wire between the No. D25 (7.5 A) fuse in the passenger's under-dash fuse/relay box and the center switch panel.
- Open wire check (ILL- (LED) line)
-1. Turn the combination light switch off.
-2. Turn the vehicle to the OFF (LOCK) mode.
-3. Disconnect the following connector.
Gauge control module connector A (32P) -4. Check for continuity between test points 1 and 2.
Test condition Vehicle OFF (LOCK) mode Center switch panel 5P connector: disconnected Gauge control module connector A (32P): disconnected Test circuit ILL- (LED) Test point 1 Center switch panel 5P connector No. 3 (PUR) Test point 2 Gauge control module connector A (32P) No. 13 (PUR) Is there continuity?
YES
Replace the center switch panel .
NO
Repair an open in the wire between the center switch panel 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.