How to avoid Dsp/Amp reboots during engine crank?

Snoopy Singh · 08-07-2016, 04:56 AM

I have tried signal sensing through speaker inputs for remote as well as the pin 13 remote behind the idrive to turn on my Dsp/Amp. Either way works great, but both have the same behaviour during engine crank.

When I unlock the car, Idrive wakes up, Dsp powers on which then in turn powers the amp on. When I put the key into the slot and crank the engine, all the current being drawn by the starter results in the Dsp/Amp rebooting. It takes around 15/20 seconds for Dsp to reboot because of a 1 or 2 second engine crank which is very annoying.

I was thinking if I could add a time delay relay on the remote wire going to the Dsp this could solve the issue.

Anyone have any thoughts?

Thanks

kaigoss69 · 08-09-2016, 02:10 PM

Sounds like you may need a new battery.

6spdcoupe · 08-10-2016, 11:29 PM

^^ I would have to agree. Shouldn't have that problem at all and I've never seen it before of several dozens that we installed.

taibanl · 08-12-2016, 10:41 PM

Has happened on my car since day 1. I have a theory that its intentional to preserve starting voltage on certain cars (diesel?)

Snoopy Singh · 08-13-2016, 04:42 AM

Thanks for your replies guys. my battery is almost new, only a few months old. My amp/dsp is connected to the main positive battery terminal. (Main + lug on the actual battery not the fused distribution block) Could this cause any issues?

Quote:

Has happened on my car since day 1. I have a theory that its intentional to preserve starting voltage on certain cars (diesel?)

Any idea's on things to try to solve this?

Thanks

08-07-2016, 04:56 AM	#1
Snoopy Singh Private 6 Rep 93 Posts Drives: 06 E92 335D Join Date: Jan 2013 Location: Scotland iTrader: (0)	How to avoid Dsp/Amp reboots during engine crank? I have tried signal sensing through speaker inputs for remote as well as the pin 13 remote behind the idrive to turn on my Dsp/Amp. Either way works great, but both have the same behaviour during engine crank. When I unlock the car, Idrive wakes up, Dsp powers on which then in turn powers the amp on. When I put the key into the slot and crank the engine, all the current being drawn by the starter results in the Dsp/Amp rebooting. It takes around 15/20 seconds for Dsp to reboot because of a 1 or 2 second engine crank which is very annoying. I was thinking if I could add a time delay relay on the remote wire going to the Dsp this could solve the issue. Anyone have any thoughts? Thanks
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08-09-2016, 02:10 PM	#2
kaigoss69 Brigadier General 301 Rep 3,969 Posts Drives: '08 335i Join Date: Jul 2008 Location: JAX iTrader: (6)	Sounds like you may need a new battery. __________________ Mobridge DA2 > JBL MS-8 > ARC XDi 600/4 > JBL Gti 408 Mids & Vifa OT19 Tweeters; PG Ti2 1600.5 > Morel HCW-10 & IDMax 15
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08-10-2016, 11:29 PM	#3
6spdcoupe tends to get irritable 205 Rep 800 Posts Drives: 21 M5C,18 M550,14 F15 Join Date: Nov 2009 Location: Central Jersey iTrader: (2)	^^ I would have to agree. Shouldn't have that problem at all and I've never seen it before of several dozens that we installed. __________________ AC Schnitzer/Eibach/M Performance/RaceChip/Compustar/Drone/BimmerTech/FireTV/Helix/Dynaudio/Micro-Precision/Jehnert/Audiomobile
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08-12-2016, 10:41 PM	#4
taibanl Brigadier General 281 Rep 4,121 Posts Drives: BMW Join Date: Sep 2010 Location: NA iTrader: (4)	Has happened on my car since day 1. I have a theory that its intentional to preserve starting voltage on certain cars (diesel?)
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