2010 Double Cab w/ JBL

I have a 2010 Tacoma double cab with the JBL system and I recently installed pioneer z120bt head unit. I have two issues I am trying to work through and would appreciate any help.

1. I can hear a real faint hiss when I am driving and have the radio volume really low or am on the bluetooth. I notice it as I accelerate. I am wondering if this would mean the amp needs tuned (how do you do that on the JBL system??) or something with the ground.

2. I paired my HTC EVO with the z120bt and it is clear as can be for me, but the other party hears static when I am not talking. Any idea how to fix that?

As always, thanks in advance.

 

i know your fustration. I think it is probably the stock amp you are having trouble with. It is a POS for sure. I did the same thing...sort of. Installed a new HU and ran it on the factory amp / speakers for about 2 weeks before I could get the rest of the stuff put in. Some results. After I bypassed the factory amp and installed new speakers and amp the problem was gone. No idea why but the factory amp sucks and could be causing the problem

 

Did that just fix the hiss or were you having problems with your bluetooth also? I am not sure what is involved in replacing the amp or how costly something like that is. I wish I could retune the damn thing somehow, but I guess that would first require being able to find the damn thing

 

How did you hook the Pioneer up to the JBL, did you use the JBL interface box?

 

Yes, I used the TA07SR

 

I had the same problem in 4Runner with JBL and put a wire around the ground shield on the RCA plugs and ran to ground to a separate ground.

 

bookmonke, I am not sure I follow. I am willing to try about anything right now. What is the ground shield on the RCA plug? Where did you get the separate ground? Right now I ground all my wires back to the factory stereo ground wiring

 

You know how the RCA plugs on the JBL interface have a center and out part, wrap a wire around the outer part put electrical tape over and ground the other end to some metal, this is a completely new wire. Hope that makes more sense, it is hard to explain.

 

I think I follow you, so essentially you are grounding the active RCA plugs by wrapping a wire around the metal outer part and running to a ground somewhere. Am I following you?

 

Yes, you can test quickly just by touching wire to the RCA and to ground with a clip or test probe.

 

Thanks I will give it a try, did this also help your bluetooth call quality? The other party hears statci when I talk and I did not have that on my factory unit.

 

I think that is just the bluetooth, it seems bad on other end.