Voice guidance is not workin on Maps

If the phone is paired to the car, it is very possible then that the maps are attempting to send the instructions to the vehicle speakers. If you look at the route information at the bottom of the screen, and you scroll upwards, you should see several buttons, including nearby POIs and other buttons for the map. On the bottom right I have a button for Audio, and it allows you to set the volume right there, and I'll test later on, but I'm pretty sure that it allows you set the audio source.

Okay, I'm guessing that when you say Sound in Settings, you are referring to the sound in Maps? If you go to Settings>Maps, then select Driving & Navigation, the Navigation Voice volume is set there. Also, is the phone paired to Bluetooth in your vehicle? And lastly, what troubleshooting have you tried?

If you don't see a choice for audio to Bluetooth, I would check with Honda. I've read numerous posts about how infamous Honda's are with Bluetooth connections with the iPhone. They may need to check to see if you have the most current software for your audio system. I would go out and check my vehicle, but we are getting quite a snowstorm here in the Midwest, and I'm not going out in the driveway to check my vehicle.

You're welcome. Glad you were able to identify the problem. What is the year/make of the vehicle you are using the BT in? Is this a stock radio in the car, or an aftermarket device?

What do you mean it isn't working? You are not hearing the guidance, or it does not show the route, or what? You need to provide more information, as well as indicate what troubleshooting you have already tried so people are not recommending things you have already tried.

As a side note, I just used my Apple Maps on Thursday for a 3 hour trip and the voice guidance was working just fine on an iPhone X with iOS 11.2.5.

You're welcome. If I come up with any additional information, I'll post it here.