[BeamerMseries]

Hello to everyone

I am new to this forum and I live in London. I just recently (Month ago) purchased a 2008 318i M sport. I installed a Kenwood (all in Satnav, Bluetooth, DVD) Single Din through an Audio Specialist.

The problem is whenever I approach a traffic lights the engine cuts off and as soon as I clutch in, the engine fires up BUT it shuts down my whole audio system. It will then take about 10 secs to reboot itself and would start playing normally. This is quiet annoying everytime the the audio shuts out cause of the start stop system. The audio specialist couldnt figure it out and I am totally lost when it comes to electronics.

Any suggestions is greatly appreciated.

Thank you all for the help

Kind regards
H

[ctuna]

I would be looking at the engine problem first.
Do you have any idea of what this guy used for connection points
for power.

[cole92]

Accessories must turn off then during clutch in, wire to ignition and you should be set (verify with meter). There will be a switched 12v somewhere in the vehicle that doesn't power off during clutch in.

Originally Posted by ctuna

I would be looking at the engine problem first.
Do you have any idea of what this guy used for connection points
for power.

His vehicle has the start/stop system.

[BeamerMseries]

Originally Posted by ctuna

I would be looking at the engine problem first.
Do you have any idea of what this guy used for connection points
for power.

He just used the standard BMW audio wiring which was already in there. He said that my battery might be a bit low and to try a new battery. The new battery cost around £200. I am not sure why I should require a new battery, when my car starts straight away and no warning lights on dash board.

This issue is only happening when the car comes to a stop and the engines cuts out to save fuel!!! the audio is still playing when the engine is shut out BUT as soon as it fires up, it shuts out the audio!!!

I am so confused.

[cole92]

Originally Posted by BeamerMseries

He just used the standard BMW audio wiring which was already in there. He said that my battery might be a bit low and to try a new battery. The new battery cost around £200. I am not sure why I should require a new battery, when my car starts straight away and no warning lights on dash board.

This issue is only happening when the car comes to a stop and the engines cuts out to save fuel!!! the audio is still playing when the engine is shut out BUT as soon as it fires up, it shuts out the audio!!!

I am so confused.

Read my post.

[BeamerMseries]

Originally Posted by cole92

Read my post.

Thank you so much on your prompt response. I will take it back to the audio place and ask them to do what you mentioned.

Once again thank you all

Kind regards
H

[fdriller9]

What is the start stop system? Are you talking about NIC?

[BeamerMseries]

Originally Posted by *********

What is the start stop system? Are you talking about NIC?

Hi

Start Stop system - Its there as a fuel efficiency system.

Everytime you come to a stop, the engine will automatically cut off to save fuel (providing the car is in neutral). As soon as you are ready to move, you clutch in and the engine fires up to drive.

[fdriller9]

Originally Posted by BeamerMseries

Hi

Start Stop system - Its there as a fuel efficiency system.

Everytime you come to a stop, the engine will automatically cut off to save fuel (providing the car is in neutral). As soon as you are ready to move, you clutch in and the engine fires up to drive.

Wait so the engine physically shuts off? Like if you were to turn your car off and take the key out?

The feature I was talking about, Neutral Idle Control (NIC), disengages the drive train when coming to a stop and re-engages it when starting up.

I wonder if the Start Stop feature superseded NIC because NIC sucks. Alot.

[cole92]

Originally Posted by *********

Wait so the engine physically shuts off? Like if you were to turn your car off and take the key out?

The feature I was talking about, Neutral Idle Control (NIC), disengages the drive train when coming to a stop and re-engages it when starting up.

I wonder if the Start Stop feature superseded NIC because NIC sucks. Alot.

Yes, physically shuts off. States are getting it this year I believe.

[luster]

Simply needs to tap into a new 12v source thats not affected by the start/stop system.

I believe (I'm probably wrong) the stock head unit does tap into accessory power, but uses canbus for ACC power (as in when canbus tells it the car is shutdown, it shuts down)

As a side note, what extra strain does the start/stop put on the motor, what part wears out sooner? I drove an audi with the same system and always wondered what the achilles heal would be for a system like this.

[BeamerMseries]

Originally Posted by luster

Simply needs to tap into a new 12v source thats not affected by the start/stop system.

I believe (I'm probably wrong) the stock head unit does tap into accessory power, but uses canbus for ACC power (as in when canbus tells it the car is shutdown, it shuts down)

As a side note, what extra strain does the start/stop put on the motor, what part wears out sooner? I drove an audi with the same system and always wondered what the achilles heal would be for a system like this.

I always thought about the strain on the starter motor with the start stop system.

initially the lighter puts out a constant power, however there is a drop in the voltage when the engine powers up. The car is going back to the audio place in two weeks time. I will post the outcome.

[luster]

Originally Posted by BeamerMseries

the lighter puts out a constant power, however there is a drop in the voltage when the engine powers up. The car is going back to the audio place in two weeks time. I will post the outcome.