What is the reason for no sound when connecting Bluetooth in Haval Big Dog?

[McAmara]

Haval Big Dog connecting Bluetooth with no sound may be due to failure to connect to the Bluetooth headset or the Bluetooth headset speaker having no sound. Failure to connect to the Bluetooth headset: You can try re-pairing. First, turn off the Bluetooth headset and then long press the multifunction button to activate the Bluetooth headset for re-pairing with the phone. Then restart the phone to clear the previous Bluetooth headset information and search for Bluetooth again. Bluetooth headset speaker having no sound: Re-pair the phone with the Bluetooth, adjust the phone volume, and ensure the Bluetooth headset stays within a 10-meter range of the phone. If the Bluetooth headset has low battery or no power, charge it for a while using the charger, then long press the multifunction button for more than three seconds to turn it on.

[VanManuel]

I've noticed many car owners encounter the issue of Bluetooth connecting without sound. For the Haval Big Dog, there are several key areas to check: First, verify if the phone volume is turned up sufficiently, as phone and car audio volumes are adjusted separately. Then, navigate to the car's infotainment settings to check if the Bluetooth connection status shows a paired audio device – if only call audio is connected without media playback, there'll naturally be no sound. Once, I accidentally triggered the mute function via steering wheel controls and spent ages figuring it out. Also, remember to delete old Bluetooth pairings and reconnect, as stale connections can occasionally glitch. Outdated infotainment systems may also cause compatibility issues – a quick system upgrade at the 4S dealership usually resolves this.

[LeGeorge]

Bluetooth having no sound is quite frustrating. First, try completely turning off and restarting your phone's Bluetooth, and also reset the car's infotainment system to factory settings. Then, focus on checking two key areas: whether the car's audio output channel is incorrectly selected—sometimes it accidentally switches to radio mode; and whether the phone app has sufficient audio permissions, especially for iPhones which require separate media playback authorization in the settings. Last time, a thick phone case was found blocking the signal, causing intermittent sound loss. If that doesn’t work, it might be due to poor contact in the car's amplifier module, requiring disassembly of the dashboard for inspection. For those who have modified their audio systems, pay attention to grounding issues in the wiring.

[DiDylan]

Oh, I have so much experience with this. First, check if your phone's music app hasn't switched to Bluetooth output—many Android devices default to the speaker. The car speakers themselves might also be faulty; try playing a song from a USB drive to determine if it's a hardware issue. Many people don't know that holding down the call button on the steering wheel can mute the sound. Also, after a phone system update, you might need to re-pair the device, especially with iOS upgrades, which often cause this issue. The funniest one was when a kid accidentally switched the audio output to the rear headphone jack, and it took half a day to figure that out.

[DiAmara]

Divide the troubleshooting into three levels: Primary check includes mobile media volume + vehicle media volume; Intermediate operations involve deleting pairing records, restarting the vehicle system (hold the power button for 10 seconds), and testing with another phone; The ultimate solution is to inspect the main unit wiring harness connector. Pay special attention that Haval vehicle systems have a separate Bluetooth media volume setting, located on the second page of the sound menu. If there is sound during calls but no media sound, it indicates an unsuccessful AVRCP protocol handshake. Those who have changed the vehicle system theme should remember to restore default settings. A burnt-out relay can also cause the amplifier to lose power.

[TeaganRose]

Suddenly no sound while driving can be nerve-wracking. Don't panic: Press the car's infotainment screen with two fingers simultaneously for five seconds to enter engineering mode and check Bluetooth logs; try connecting different phones to rule out device issues; inspect fuse F37 in the fuse box. Common causes include phone power-saving modes restricting background playback, or media muting when the car microphone occupies the audio channel. If it shows connected but no sound, unplug and reconnect the fiber optic connector behind the head unit. For modified audio systems, check if the amplifier's REM wire is loose. As a last resort, use the secret key combination ##4636## to reset the entire module.