2013 Tacoma problems

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meisner
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2013 Tacoma problems

Post by meisner » Tue Apr 09, 2019 8:49 pm

Vehicle: 2013 Tacoma w/out JBL
Aftermarkeet Headunit: Kenwood DNX995S
Harness: TO1
Steering wheel control: Maestro RR
Firmware: ADS-RR(SR)-TOY01-DS (512) (3.1)
Hardware: RR (512)

I soldered the TO1 to the Kenwood harness and found the Kenwood HU would not power up. I used a VOM to test the pins at the HU and found that Black was a good ground, yellow was 12V constant, but red was only ~4.7V.

After pulling the harness and bringing it back to the bench to trace wires, I discovered yellow wire is fed from the unused 12-pin unused connector on the TO1 harness. It also goes to the 3-pin (Black/Red/Yellow) harness on the RR.

The firmware flashed with no problem (version above).

The RR is blinking what appears to be a correct sequence...when I push the steering wheel buttons on the left side of the steering wheel, they blink green once, twice or three times based on the button. The buttons on the right cause a red blink(s), again based on the button pushed.

Any thoughts??? I am stumped right now since the RR is a 'black box' to me.

Thanks,
Steve

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Dara DeGrand
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Re: 2013 Tacoma problems

Post by Dara DeGrand » Wed Apr 10, 2019 10:18 am

Can you be more specific about what problems you're experiencing?
Dara DeGrand
Maestro Technical Support Manager
Automotive Data Solutions Inc.
8400 Bougainville, QC
T 514.807.2888
TF 866.427.2999

meisner
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Re: 2013 Tacoma problems

Post by meisner » Wed Apr 10, 2019 11:07 am

and found the Kenwood HU would not power up
That is my current issue.

If I put the head unit with the existing harness on the bench and apply 12v to the unused 12-pin harness, the head unit powers up fine. Using the TO1 harness plugged into the Tacoma wiring, it does not.

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Dara DeGrand
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Re: 2013 Tacoma problems

Post by Dara DeGrand » Wed Apr 10, 2019 11:24 am

Sorry I missed that. Let's test the power on the maestro side to see what kind of voltage we're putting out and rule out poor connections.

With the RR/harness installed in the vehicle and the key on, meter the heavy gauge red and yellow wires on the RR's black 3-pin plug. What voltage do you have on each of those wires?

Also, on the TO1 harness, there is a red/black wire populated next to the yellow. What voltage do you have on that wire when the key is on?
Dara DeGrand
Maestro Technical Support Manager
Automotive Data Solutions Inc.
8400 Bougainville, QC
T 514.807.2888
TF 866.427.2999

meisner
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Posts: 6
Joined: Tue Apr 09, 2019 8:27 pm

Re: 2013 Tacoma problems

Post by meisner » Wed Apr 10, 2019 5:31 pm

I also took pictures of all sorts of details, so let me know if you want any posted here.

At the Maestro 3-pin power connector, the Yellow was 13V, Black is a good ground and Red was 1.093V.

The Red/Black wire was showing 13V. All of this was with the engine running.

meisner
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Re: 2013 Tacoma problems

Post by meisner » Wed Apr 10, 2019 10:15 pm

I just realized I cited the wrong wire in the second paragraph my first post:
After pulling the harness and bringing it back to the bench to trace wires, I discovered yellow wire is fed from the unused 12-pin unused connector on the TO1 harness.
That should have said the Red wire is fed from the unused 12-pin connector. All yellow wires are showing the proper/expected 12V.

From the wire tracing and the voltages measured, it sure seems as though it is expected to power the Red wire from the unused 12-pin harness. The odd voltages I am seeing now feels more like a backfeed coming thru some other path.

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Dara DeGrand
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Re: 2013 Tacoma problems

Post by Dara DeGrand » Thu Apr 11, 2019 8:21 am

The red/black triggers the heavy gauge red wire on the maestro's 3-pin to output voltage; it's just a sipmle relay output. I recommend doing a reset on the Rr.

Disconnect all plugs from the Rr. Push and hold the button on the RR, and keep holding it as you plug the 3-pin power connector. Keep holding the button until the light on the Rr flashes red fast, then let it go. It should go green, then go out, indicating the reset is successful. Reconnect everything and give it a try.
Dara DeGrand
Maestro Technical Support Manager
Automotive Data Solutions Inc.
8400 Bougainville, QC
T 514.807.2888
TF 866.427.2999

meisner
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Re: 2013 Tacoma problems

Post by meisner » Thu Apr 11, 2019 8:30 am

Reset worked fine, but still getting 1+V on the red wire at the Maestro connector.

meisner
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Re: 2013 Tacoma problems

Post by meisner » Thu Apr 11, 2019 1:14 pm

Found the issue. One of the 6 (or 8) pin connectors on the side of the maestro had a bad connection. The female side seemed to not be pushed in all the way on one of the connectors. I pulled the pin out and reset it and now things are working fine.

That was frustrating!

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Dara DeGrand
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Re: 2013 Tacoma problems

Post by Dara DeGrand » Thu Apr 11, 2019 2:11 pm

Ahh! I'm so sorry for the trouble, but glad you found it and got it going!
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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