Pioneer avicw8400 in 17 forester with HK non nav

Group using the SU1 and SU2 firmware* see specific firmware for full feature list.
User avatar
billr
ADS Team
Posts: 404
Joined: Mon Feb 05, 2018 9:18 am

Re: Pioneer avicw8400 in 17 forester with HK non nav

Post by billr » Fri Dec 14, 2018 3:49 pm

when you update the radio you won't have to reflash the Maestro.

As for what could be causing the difference in speed I don't know...it's really odd. I would call Pioneer and have a talk with someone there to see what else could be affecting the Pioneer. And do the update anyway, it's possible that they have fixes for minor things and they just don't list it, one of those things could the cause of the issue.
William (Bill) Repicky
Automotive Data Solutions Technical Support
MECP Master Certified
ASE A6 Certified
866-427-2999

Voyles
New User
Posts: 13
Joined: Tue Aug 28, 2018 10:10 pm

Re: Pioneer avicw8400 in 17 forester with HK non nav

Post by Voyles » Tue Dec 18, 2018 12:17 pm

The speed on the navigation gps also never goes above 50 mph, even if I drive 70. Is there a setting I can change some where?

Voyles
New User
Posts: 13
Joined: Tue Aug 28, 2018 10:10 pm

Re: Pioneer avicw8400 in 17 forester with HK non nav

Post by Voyles » Tue Dec 18, 2018 4:50 pm

I just talked to Pioneer and they told me the GPS pulls speed from the VSS within the navigation screen. They suggested cutting the vss wire all together and let the GPS antenna get a speed that’s accurate. There is someone else with the exact problem with the same unit. I don’t know what i’m missing here. Could there be something wrong with my harness? :x

User avatar
billr
ADS Team
Posts: 404
Joined: Mon Feb 05, 2018 9:18 am

Re: Pioneer avicw8400 in 17 forester with HK non nav

Post by billr » Tue Dec 18, 2018 5:30 pm

Try what Pioneer suggested and see if that fixes the issue. If it still reads the wrong speed maybe there is something wrong with the radio. If you really feel that there is an issue with the wire harness return it and get a new one, there shouldn't be an issue with that.
William (Bill) Repicky
Automotive Data Solutions Technical Support
MECP Master Certified
ASE A6 Certified
866-427-2999

Voyles
New User
Posts: 13
Joined: Tue Aug 28, 2018 10:10 pm

Re: Pioneer avicw8400 in 17 forester with HK non nav

Post by Voyles » Tue Dec 18, 2018 6:30 pm

eprudden Is having a similar issue with the speed on his GPS/w8400.

I don’t know how the software works within the maestro rr unit to know the impact of cutting the vss wire. I just don’t want to cut wire to only solder them back up.

User avatar
billr
ADS Team
Posts: 404
Joined: Mon Feb 05, 2018 9:18 am

Re: Pioneer avicw8400 in 17 forester with HK non nav

Post by billr » Tue Dec 18, 2018 6:36 pm

the VSS wire is just there for radios that need to use it, it doesn't effect how the Maestro unit works. Many radios now have moved away from using the VSS wire and solely relying on the GPS antenna.
William (Bill) Repicky
Automotive Data Solutions Technical Support
MECP Master Certified
ASE A6 Certified
866-427-2999

Voyles
New User
Posts: 13
Joined: Tue Aug 28, 2018 10:10 pm

Re: Pioneer avicw8400 in 17 forester with HK non nav

Post by Voyles » Wed Dec 19, 2018 10:43 am

Bill,
1.Do you know if the vss wire from the radio side goes straight to the 20 pin car side (Pin 19 I think).

2. Does the vss wire go through the module?

3. What color is the wire on subaru side of the harness for the vss?

I am hoping to tear the radio out after Christmas and cut the vss wire. Or possibly cut the wire before and after the module and join them back up. Pioneer mentioned that the module, if it runs through it, it can affect the speed pulse.

4. Additional question. I still haven't cut the blue wire on the 6 pin. If this is a ground, would that go back to the module and mess with the vss? I haven't hooked the blue wire in the main harness up as the other blue is hooked up.

Can you recommend an approach to minimize effort when I have time to tackle this again?

User avatar
billr
ADS Team
Posts: 404
Joined: Mon Feb 05, 2018 9:18 am

Re: Pioneer avicw8400 in 17 forester with HK non nav

Post by billr » Wed Dec 19, 2018 11:26 am

The VSS signal is read off the High Speed CAN wires at the OBD2 plug. That's why the VSS signal went away when you removed the OBD2 plug originally. So there is no VSS wire in the Subaru harness...we just read it from the data bus of the vehicle.
As for the Blue antenna turn on lead affecting the VSS signal, I see no way of that happening.

So I would cut the Pink wire coming from the Maestro (VSS wire) and use the GPS antenna to give you the speed information for the radio.
William (Bill) Repicky
Automotive Data Solutions Technical Support
MECP Master Certified
ASE A6 Certified
866-427-2999

Voyles
New User
Posts: 13
Joined: Tue Aug 28, 2018 10:10 pm

Re: Pioneer avicw8400 in 17 forester with HK non nav

Post by Voyles » Thu Dec 20, 2018 11:00 am

Ok, I’m confused when you say there’s no vss wire in my Subaru. I was under the impression from other readings that I do have a vss wire somewhere.

I’m currently getting a speed pulse somehow to the radio.l, just not correct. Is that coming from the vss wire now? That’s why I asked I’d the vss wire went through the maestro rr module. The instructions do call a vss wire to be connected for installation.

User avatar
billr
ADS Team
Posts: 404
Joined: Mon Feb 05, 2018 9:18 am

Re: Pioneer avicw8400 in 17 forester with HK non nav

Post by billr » Fri Dec 21, 2018 9:07 am

it sounds like it would be better for all if you just called us and we can explain it over the phone
William (Bill) Repicky
Automotive Data Solutions Technical Support
MECP Master Certified
ASE A6 Certified
866-427-2999

Post Reply

Return to “Subaru”