Radio unit rebooting on cranking

Here is the problem. I come to the truck, turn on the radio. It takes about 5-7 seconds for the radio to reboot and show the backup camera screen so I plugging the phone and now I ready to roll. I'm starting the engine and guess what - radio is rebooting. Wait few seconds ready to roll back, mess up with clutch and truck is stalling. Cranking it but now backup camera is gone again and screen is not showing the image while the head unit is rebooting for the next 5-7 seconds. Pisses me off.

Is it something wrong with connecting the ACC with ST1 at the ignition switch via diode so when I turn the key to START the ACC will not loose the power. Do you see anything wrong in this concept?

 

Uhh, why are you wiring it like that? Is there something wrong with the original wire?

 

Start the truck, mess with the phone, 5bseconds is gone. Don't stall.

Done.

Alternatively, look through your back window and don't worry about staring at a screen.

 

Sounds like a failing battery to me.

Have someone crank the truck while you have a multimeter across the terminals, report back voltage seen.

 

I mead to add "blue line with diode". The issue is that AM1 disconnects ACC when switch is moved to position ST1. Because of that all elements powered via ACC fuse will loose power while cranking and that includes my radio. I want the radio to be powered in any key position except OFF. Right now the radio is powered only in key position ACC and IG1

 

Agree. You could also "jump start" the engine and see if it still happens

 

OK, this scenario is one of many other related to radio rebooting while cranking. There are others like talking on the phone hands free, listening to the radio traffic, watching porn DVD, man, whatever. It was not a question about changing habit but any issues that the mod could create.

 

So you say the ACC is already powered while cranking? That changes all. I'm glad I asked, because I was sure it was not. Easy to check it by pulling out the Starter fuse.

 

I don't think your suppose to wire anything to the starter wire. Its only there to power the starter for a couple seconds. If the acc is overloaded than a relay should be used to power your source.

 

Most vehicles cut power to everything during cranking. The easiest way to bypass it is just connect the yellow and red wires. You'll just need to remember er to turn the radio off 2hen you're parking.

 

Connect to the black and red it doesn't lose power when cranking. But you will lose radio function in ACC position. If you add the diode there every thing tied in the ACC circuit will have power when cranking. You need to put 2 diodes at radio power wire. I'll draw a diagram.

 

This will let the radio work in ACC position and isolate the ignition power. But it needs to be done at the back of the radio.

 

Thank you, this is ideal solution but with one change. Instead black and read I would use wire fused by 4WD (I have my DRL powered from it). DRL stay on while cranking (I verified that). My original diagram has a flaw: using ST1 as alternative power is wrong as at the time of turning a key it is possible that ACC will turn off before ST1 is powered. That split second power loss can reboot the radio. IG1 or IG2 is powered without interruption when the key is in ON or START position.

Thank you @mechanicjon for suggestion.

Oh, and I forgot to mention that because I don't have anything connected to 4WD fuse originally (I have all manual) only my added DRL I replaced this fuse with 3.5A. The data spec for my radio says Max Current Used = 15A so I might swap this fuse back to 15A

 

I'm going to do this mod myself. The stereo boot time is irritating to say the least.

 

No, you missed the point. IF the voltage to the radio is dropping below it's minimum threshold it will reboot. Adding another known good battery to the test during the jump will help keep the voltage up during the crank. If it fixes the problem I'd change the battery and clean all the battery / cables (BOTH Ends) connections. IF it still reboots I'd then look elsewhere.

 

The radio is suppose to shut off when you're cranking the engine to start though. Once the key returns back to its 2nd position the radio will boot up. Its confusing to me why you have the starter wire also connected to the acc wire like that.

 

The ACC circuit loses power in the start position. It's not an issue of low battery.

If you read all the post. It's discussed that the starter wire is not the best wire to connect to.

 

use a relay to power the radio, use ign1 to trigger the relay to power radio.

 

Then it will not work in the ACC position. A diode as drawn will do just fine.

 

I guess, I just don't like to cut up factory wiring. Rather use a posi-tap.