2005 Sienna Kenwood DDX9704S install questions

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hermanadad
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2005 Sienna Kenwood DDX9704S install questions

Post by hermanadad » Tue Apr 17, 2018 9:51 pm

I just installed Maestro RR with the toyota harness and my new Kenwood HU. I have a 2005 Sienna Limited with the 10 speaker JBL synthesis. It did not have Nav or a back up camera. However I installed a new non-oem backup camera. I followed the instructions, although there was nothing specific about a non-oem camera. I connected the camera power directly to the ACC (blue/white) wire coming from the HU and going to the harness so the camera would always have power when the radio was on.

The camera is working, however when I put it into reverse the screen does NOT automatically switch to the back up camera view, nor does it show the gridlines. I always have to hit the camera button to get the back up view.

I went to the camera settings on the Kenwood HU to be sure those where the settings I had chosen. Should I switch the camera from the blue/white lines to the purple/white lines coming from the HU and connected to the maestro harness?

Also, the HU says that the OBD is not being read and is providing no data from the car. I've checked the connections and all seems fine. I've unplugged and replugged, and even disconnected the negative on the battery terminal.

Any suggestions?

Thanks in advance.

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billr
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Re: 2005 Sienna Kenwood DDX9704S install questions

Post by billr » Wed Apr 18, 2018 10:01 am

hi there, we talked on the phone however I will respond here for others who are curious. Sometimes the Reverse signal is not on the data bus of the vehicle and in your situation that is the case. Getting the reverse signal at the tail light is fine, you'll just run that wire to the Kenwood's reverse wire (purple/white stripe).

As for the OBD2 issue, I would recommend doing a reset on the RR module. you can reset the module through the radio settings: Vehicle Setup>Maestro Features>Maestro Module>Master Reset
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hermanadad
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Re: 2005 Sienna Kenwood DDX9704S install questions

Post by hermanadad » Thu Apr 26, 2018 9:44 pm

Ok just a few things to follow up on my post. After doing a lot of questions and answers and digging around here's what I found out about my 2005 Sienna.

On My OBD connector I have the following pins populated coming from the vehicle:

4 Chassis Ground 12 TS -- Never figured out what this is
5 Signal Ground 13 TC -- Timing Check advanced angle adjustment ABS Codes
6 CAN High 14 CAN Low
7 K-Line ISO 9141-2 15 L-Line ISO 9141-2
16 Power

These where the pins I had and WHAT THEY SHOULD NORMALLY be. The thing to know is that in 2008 CAN became the standard. Prior to that it was hit or miss as to whether a car might have CAN or ISO. Toyota especially seems to have flip flopped around depending on the vehicle. It appears that a 2006 Sienna likely has CAN but I can't confirm that.

I happen to have an OBDII reader made by Foseal and I was using OBDCarDoctor (a free app) and while I was fooling around with the App I noticed that it actually would tell me what the protocol was being used by my car. This was after much trial and error trying to get this to work, especially since my Foseal OBD wifi connector was giving me RPM's speed, gas mileage, efficiency and a whole host of other data. That was through the paid app DashCommand.

What I found out was that despite having wires in the CAN area of the OBDII that the OBDII was communicating via ISO 9141-2 and NOT can. That Foseal OBDII connector is pretty cheap and the OBDCarDoctor app is free so it would be a cheap way for you to find out how your car is communicating.

One of the main reasons I paid the money for the harness was to get OBD communication to the head unit.

Obviously someone, specifically OBDCarDoctor and DashCommand and probably a whole host of other car apps, have figured out how to take the ISO data off the toyota and provide the info that Maestro is using through CAN. It would be great if Maestro in the future adds ISO support as clearly others have figured it out. Would really open up their ability to add more cars that they support.

One other thing, when resetting Maestro through the kenwood head unit, the maestro settings are in a very weird place Gear button -->Settings --> AV Settings --> Maestro

Not sure whey they are in the AV settings but there they are. It was driving me crazy that I couldn't find it and it just never occurred to me to look there. I swear I tried everything but the A/V settings at least 3-4 times and then finally I just said I'm going to go through each and everything methodically and not skip anything. Sure enough there it was. Hope that helps someone.

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billr
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Re: 2005 Sienna Kenwood DDX9704S install questions

Post by billr » Fri Apr 27, 2018 9:56 am

thank you for all the good information, you really went above and beyond.
For our gauge info we only read High Speed CAN messaging and not ISO and there are no plans to be backwards compatible.
As for the settings menu, each radio manufacturer has their own way to get to the Maestro menu and it can get pretty confusing especially if you don't access those menu's regularly.
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cdlenfert
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Re: 2005 Sienna Kenwood DDX9704S install questions

Post by cdlenfert » Mon May 21, 2018 11:31 am

@hermanadad is spot on with his assessment. I have a 2006 Sienna and it also cannot read from the OBDII connection. It's unfortunate that there are no plans for the Maestro unit to optionally work with the ISO connection. At a minimum it would be nice to not represent compatibility with a pre 2008 Sienna. Everything on the Maestro website said it would work with my 06 but that's simply not the case.

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Re: 2005 Sienna Kenwood DDX9704S install questions

Post by JustinFerroni » Tue May 22, 2018 9:05 am

Vehicle has been removed from our Coverage List.
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