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.
USB input sound is low or cannot be heard (with navigation)
- Check the vehicle battery condition first (see 12 VOLT BATTERY TEST ).
- Check the connectors for poor connections or loose terminals.
- Not all players and player functions work with the USB adapter. Please see the owner's manual for more information.
- Turn the ignition switch ON (II).
- Check to see if there is a specific speaker that has no sound.
Do all speakers make a sound?
YES -go to step 3.
NO -Go to no sound is heard from the speaker(s) (see NO SOUND IS HEARD FROM THE SPEAKER(S) (DISPLAY IS NORMAL) (WITH NAVIGATION) ).
- Turn the ignition switch to LOCK (0).
- On the customer's vehicle, connect the customer's USB device to the USB adapter.
- Turn the ignition switch to ON (II).
- Turn on the audio-navigation unit.
- Press the AUX button until USB appears on the navigation display.
- Check if the USB device can be operated with the audio-navigation unit (Folders of Files UP/DOWN, etc.).
Can you operate the USB device, and is the sound normal?
YES -Intermittent failure the USB device is OK at this time.
NO -lf you can operate the USB device, but there is no sound, go to step 9. If you cannot operate the USB device, go to USB device does not function (see USB DEVICE DOES NOT FUNCTION (WITH NAVIGATION) ).
- Turn the ignition switch to LOCK (0).
- Connect the customer's USB device to a known-good vehicle (same year/trim) that is equipped with a USB adapter, and check the USB device operation.
Is the USB device working properly in the known-good vehicle?
YES -go to step 11.
NO -USB device is faulty. Also check the USB cable and USB adapter connector condition.
- Return to the customer's vehicle.
- Remove the audio-navigation unit (see AUDIO-NAVIGATION UNIT REMOVAL/INSTALLATION ), and disconnect audio-navigation unit connector E (14P).
- Disconnect USB adapter unit connector A (14P).
- Check for continuity between body ground and audio-navigation unit connector E (14P) according to the table.AUDIO-NAVIGATION UNIT CONNECTOR CHART
Audio-navigation unit connector Wire color E5 BLK E6 WHT E13 RED E14 GRN Is there any continuity?
YES -There is a short in the wire(s) between audio-navigation unit and USB adapter unit. Replace the affected shielded harness.
NO -go to step 15.
- Check for continuity between the terminals of audio-navigation unit connector E (14P) according to the table.AUDIO-NAVIGATION UNIT CONNECTOR CHART
From terminal (wire color) To terminal (wire color) E4 (GRY) E5 (BLK), E6 (WHT), E13 (RED), E14 (GRN) E5 (BLK) E6 (WHT), E13 (RED), E14 (GRN) E6 (WHT) E13 (RED), E14 (GRN) E13 (RED) E14 (GRN) Is there continuity between any of the terminals?
YES -There is a short in the wires between the audio-navigation unit and the USB adapter unit. Replace the affected shielded harness.
NO -go to step 16.
- Check for continuity between audio-navigation unit connector E (14P) and USB adapter unit connector A (14P) according to the table.AUDIO-NAVIGATION UNIT CONNECTOR CHART
Audio-navigation unit connector USB adapter unit connector Wire color E5 A5 BLK E6 A6 WHT E13 A13 RED E14 A14 GRN
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.