2012 Toyota Tacoma Parking Brake is "n/a"

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bshiplet
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2012 Toyota Tacoma Parking Brake is "n/a"

Post by bshiplet » Fri Nov 25, 2016 12:57 am

After completing the connections between a Maestro RR and a Pioneer AVIC-8200NEX using the T01 solution in a 2012 Toyota Tacoma, everything works except the parking brake detection. As a result, I cannot perform the initial Android Auto setup as the head unit does not 'see' the parking brake.

When I go into the OEM info screens and view the output from the Maestro, the "Parking Brake" entry shows "N/A". All other functions seem to work and I've ensured the head unit is flashed with the most recently available firmware (1.01) and have used the website to flash the Maestro with the latest firmware as well (ADS-RR(SR)-TY01-DS v02.10). I've also checked continuity for the light green wire from the head unit plug to the Maestro plug, so it seems to be either the Maestro isn't sensing the application of the parking brake or it isn't communicating its status properly.

I could run a wire and connect the radio directly to the parking brake in the truck, but as the Maestro is advertised as supporting the parking brake status, I'd prefer to get it working as intended.

Any suggestions?

Thanks!
Ben

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Dara DeGrand
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Re: 2012 Toyota Tacoma Parking Brake is "n/a"

Post by Dara DeGrand » Sat Nov 26, 2016 10:30 am

I will need to check with our engineering team on Monday. It should work; If you have access to a multi-meter, it would be great if you could take a reading of that wire. The parking brake should send a ground when the parking brake is applied. Since we're not detecting it on your data bus, I'm curious what the wire reads?
Dara DeGrand
Maestro Technical Support Manager
Automotive Data Solutions Inc.
8400 Bougainville, QC
T 514.807.2888
TF 866.427.2999

boricuastock
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Re: 2012 Toyota Tacoma Parking Brake is "n/a"

Post by boricuastock » Mon Jul 24, 2017 11:03 pm

I have a 2008 Tacoma non jbl and am having this same issue. How should I reside this or what should I test for. I have a avic 8200. Everything else seems to work fine.

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Dara DeGrand
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Re: 2012 Toyota Tacoma Parking Brake is "n/a"

Post by Dara DeGrand » Tue Jul 25, 2017 9:14 am

Upon further investigation, this is a common issue with Tacomas and FJ cruisers. They do not have a BCM, so the parking brake status is not on a data line; when it's not on data, we can't sense if it's on or off to generate the signal for you. To get the radio to see it, you will simply need to hook up the radio's parking brake input to the parking brake wire in the truck.
Dara DeGrand
Maestro Technical Support Manager
Automotive Data Solutions Inc.
8400 Bougainville, QC
T 514.807.2888
TF 866.427.2999

boricuastock
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Re: 2012 Toyota Tacoma Parking Brake is "n/a"

Post by boricuastock » Tue Jul 25, 2017 11:12 am

Thanks for the reply on that. One follow-up question I have is if I connect the sensor wire off the parking brake to the input side of the Maestro manually would that allow it to sense it (I am assuming there is a wire in the harness to tap on the input side), or does it have to come through the data line for the maestro to sense it properly? If that is possible I would like to do that over put it directly to the headunit so that both could sense the parking brake.

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Dara DeGrand
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Re: 2012 Toyota Tacoma Parking Brake is "n/a"

Post by Dara DeGrand » Tue Jul 25, 2017 11:43 am

There is no need to hook the parking brake to the maestro. We don't need to see it. Just hook the radio's parking brake to the truck parking brake, and leave the light green on the RR disconnected.
Dara DeGrand
Maestro Technical Support Manager
Automotive Data Solutions Inc.
8400 Bougainville, QC
T 514.807.2888
TF 866.427.2999

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