413 Set the external storage device to this product. Refer to Inserting and ejecting an SD memory card on page8 Refer to Plugging and unplugging a USB storage device onpage 94 Turn the source off. Refer to Selecting a source on page 115 Display the “System” setting screen. Refer to Displaying the “System” setting screen on page376 Touch [System Information].7 Touch [Firmware Update].8 Touch [Continue] to display the data transfermode.Follow the on-screen instructions to finish updating thefirmware.p If an error message appears on the screen, touch the displayand perform the above steps again.Checking the connections ofleadsCheck that the leads are properly connected between thisproduct and vehicle.1 Display the “System” setting screen. Refer to Displaying the “System” setting screen on page372 Touch [System Information].3 Touch [Connection Status]. IlluminationDisplays the status of headlights or small lamps of thevehicle.Displaying the “Audio” settingscreen1 Press the button.2 Touch , and then .Using fader/balance adjustment1 Display the “Audio” setting screen. Refer to Displaying the “Audio” setting screen on page 412 Touch [Fader/Balance].p Only the balance can be adjusted when “On” is selected in“Rear Speaker”. Touch [Balance] and skip to step 4. Refer to Setting the rear speaker output on page 41.3 Touch or to adjust the front/rear speakerbalance.p Set “Front” and “Rear” to “0” when using a dual speakersystem.4 Touch or to adjust the left/right speakerbalance. You can also set the value by dragging the pointon the displayed table.Switching sound muting/attenuationYou can automatically mute or attenuate the AV source volumeand the iPhone or smartphone application volume when thenavigation outputs the guidance voice.The default setting is “ATT”.1 Display the “Audio” setting screen. Refer to Displaying the “Audio” setting screen on page 412 Touch [Mute Level].3 Touch the item. ATT:The volume becomes 20 dB lower than the current volume. Mute:The volume becomes 0. Off:The volume does not change.Adjusting source levelsSLA (source level adjustment) lets you adjust the volume level ofeach source to prevent radical changes in volume when switch-ing between sources.p Settings are based on the FM tuner volume level, whichremains unchanged.p This function is not available when the FM tuner is selectedas the AV source.1 Compare the FM tuner volume level with thelevel of the source.2 Display the “Audio” setting screen. Refer to Displaying the “Audio” setting screen on page 413 Touch [Source Level Adjuster].4 Touch or to adjust the source volume.p If you directly touch the area where the cursor can be moved,the SLA setting will be changed to the value of the touchedpoint.p “+4” to “–4” is displayed as the source volume is increasedor decreased.p The default setting is “0”.Setting the rear speaker outputA rear speaker output of this product can be turned on or off.The default setting is “On”.1 Display the “Audio” setting screen. Refer to Displaying the “Audio” setting screen on page 412 Touch [Rear Speaker] to switch “On” or “Off”.p If “Off” is selected, the rear speaker adjustment is not availa-ble in “Speaker Level”, “Time Alignment” and “Crossover”.Setting the subwoofer outputThis product is equipped with a subwoofer output mechanism,which can be turned on or off.The default setting is “On”.1 Display the “Audio” setting screen. Refer to Displaying the “Audio” setting screen on page 412 Touch [Subwoofer] to switch “On” or “Off”.p If “Off” is selected, the rear speaker adjustment is not availa-ble in “Speaker Level”, “Time Alignment” and “Crossover”.System settings Audio adjustments