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Aftermarket Radio and Keyless Entry

Fit I.C.E. Threads discussing in-car electronics including audio, video, security, and navigation systems for the Honda Fit/Jazz

Aftermarket Radio and Keyless Entry

  #1  
Old 09-02-2016, 10:37 PM
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Aftermarket Radio and Keyless Entry

Hi all, thanks for any help you can provide.

I replaced the OEM speakers and head unit with a Kenwood unit recommended by Crutchfield. Now the ignition works strangely. Keyless entry works fine, but if i try to start the car with the keys in my pocket, it just beeps and the Keyless Entry light comes on in the dash.

If I hold the Key up to the start button, I can get the car to start, but the error light stays on and if someone opens and closes a door, I get a "No key" indicator with beeps.

Did the OEM head include some sort of antenna for this system, and if so, is there a way to make it work with an aftermarket stereo?

(I did put a new battery in the key fob just to check)
 
  #2  
Old 09-03-2016, 04:30 PM
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Take your stock radio and plug it in again (temporary), see if everything returns to normal.
 
  #3  
Old 09-03-2016, 09:37 PM
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That's good advice. I've been advised by my vendor that there's a problem with the batch of wiring harnesses mine came from, so when that comes in, I'll take it all apart and try the original radio again.
 
  #4  
Old 09-04-2016, 11:31 AM
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Look for blown fuses in all fuse boxes (there are at least 3)

"Back-up" fuse in engine compartment fusebox blown??
 

Last edited by ezone; 09-04-2016 at 11:35 AM.
  #5  
Old 09-06-2016, 04:46 PM
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I tried re-installing the factory radio the other day - didn't have the keycode so Im not sure its a good test. I may have to go back in next week.

Checked all the fuses under the hood and under the dash that had anything to do with "back" or "Smart" and didn't find anything blown.
 
  #6  
Old 09-06-2016, 08:20 PM
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didn't have the keycode
What is that? Radio unlock code?
Does the original radio have a touchscreen?
With the ignition powered up, just hold the radio power button down for about 3 seconds to unlock it.

If it does not have all of the correct power sources (i.e. blown fuse), the radio may not come on or may not unlock.


Is the car a 15 or 16? Trim level?

Since you only messed with the radio, I would only expect fuses blown that have to do with the radio.

here's the fuses I found to do with the audio system on a 2015 USA GK5 EXL CVT (without navi)

Battery terminal fuses A1 (100A), A2 (70A)

engine compartment box
b21 (15A)

Dash aux box d4 (30A) d1-3 (50A)

Dash fusebox c3 (10A), c34 (7.5A), c37 (7.5A)


I use a simple 12v test light for checking most of the small fuses, fairly simple and super quick. No fuse removal necessary.
I also tend to check ALL the fuses in a fusebox this way, without knowing or caring which fuse is used for what system...because so many systems use multiple fuses.
If/when I find a blown one, replace it, retest it, and keep checking the rest of them.


HTH
 
  #7  
Old 09-07-2016, 03:10 PM
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Thank you for the reply. I should have provided specs up front - it's a 2015 USA EX, six-speaker without Navi, so it's got the seven-inch OEM radio. Upon reconnect, it requires the radio unlock code, which I have not gotten from the dealer yet.

Thanks for the fuse suggestions - I will do that when the weather gets better.

The test light is a great idea! Do you unplug the negative terminal on the battery first?

It's very strange - the keyless entry works in that I can unlock the car remotely, but I have to hold the key right up to the ignition button to get it to start. The key error light stays on and if you open a door while it's running, the car beeps and a "No Key" light flashes in the odometer side of the readout.
 
  #8  
Old 09-07-2016, 07:55 PM
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Upon reconnect, it requires the radio unlock code, which I have not gotten from the dealer yet.
I've never had to use a code to unlock one of those.

No code needed as long as the other necessary control units in the car power up. Just turn the ignition on (start the engine), hold the radio power button on for a few seconds and once the radio 'shakes hands' with the rest of the control units and decides it's still in the car it belongs in, it will unlock.

But the pushbutton start has to work correctly first....and it does not (and it shares at least one of the fuses listed previously), so the radio probably won't unlock. Once this is corrected, the radio would be expected to unlock electronically with the above method again.


The test light is a great idea! Do you unplug the negative terminal on the battery first?
Maybe you should google for some of the basics on how to use a 12v test light.

If looking for B+, the other end must be hooked to a ground. It does not have to be the battery post, as the entire car body is 'chassis ground'. Much of the visible bare steel under a dash will be a part of the ground.

Conversely, If searching for a ground with the test light, the other end would need to be connected to a B+ source.


Did you check the fuses I listed in the previous reply?
 

Last edited by ezone; 09-07-2016 at 07:57 PM.
  #9  
Old 09-19-2016, 05:09 PM
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Hi there,

I have checked the fuses myself and had a Honda mechanic do it as well. They are all good. The mechanic theorizes that there is a part of the ignition system in the OEM radio itself, but he can't go to tech support above his level without making a ticket and charging labor.
 
  #10  
Old 09-20-2016, 12:00 PM
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Does any of this from the Owner's Manual apply to you?
http://i.imgur.com/UMDI96d.png (pg. 92)

I can't speak from experience, but I remember a post by DucktapeMaster saying he drove around without a Head Unit and had normal operations.

https://www.fitfreak.net/forums/3rd-...ml#post1324866

I'm looking into swapping my Head Unit too, so I'm interested in solving this.
 
  #11  
Old 09-20-2016, 05:19 PM
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They don't apply. There's no problem with keyless entry. It's only keyless ignition. I can lock and unlock the doors remotely.
 
  #12  
Old 09-20-2016, 07:47 PM
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The mechanic theorizes that there is a part of the ignition system in the OEM radio itself,
This is not the case. The car should start and run without the factory radio connected, as someone else noted earlier (when everything else is working correctly)

I wonder if the mis-built aftermarket radio harness caused a communication network fault?
This could get expensive if it took out any control units.

Put the original radio back in as the factory built it, show up at the dealer expecting warranty to cover the pushbutton start not working right......and just play dumb. LOL

Wait, the dealer already knows your car has been messed with? OOoooh, that may hurt.
 
  #13  
Old 02-16-2017, 08:58 AM
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Originally Posted by David Simmons View Post
Hi all, thanks for any help you can provide.

I replaced the OEM speakers and head unit with a Kenwood unit recommended by Crutchfield. Now the ignition works strangely. Keyless entry works fine, but if i try to start the car with the keys in my pocket, it just beeps and the Keyless Entry light comes on in the dash.

If I hold the Key up to the start button, I can get the car to start, but the error light stays on and if someone opens and closes a door, I get a "No key" indicator with beeps.

Did the OEM head include some sort of antenna for this system, and if so, is there a way to make it work with an aftermarket stereo?

(I did put a new battery in the key fob just to check)
What was the resolution?
 
  #14  
Old 05-06-2017, 04:54 PM
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Talking Solution!

User JimReeves found a solution! It worked for me and I've added photos. My own fault for not making sure EVERYTHING was plugged back in on the lower panel.

If you remove the piece below the heating controls where the aux jack and 12V are, you should see that on the top of it (not behind where the rest of the plugs are) there is a plug that is designed to have a connector slid sideways onto it.

For me the end of the plug was black and there were two wires coming out of it (blue & red).

I missed putting on this connector as it didn't plug into the back like the rest of them and I assumed it was an extra for a different radio package.

In the end I found a wiring diagram and noticed that one connection was missing which was this one.


 
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