Help - -removed radio- - now engine won't crank

**jsp** · 10th October 2011, 03:14 PM

There was a basic head unit which had a built in amp and powered the front and rear door speakers.

the only one I have fiddled with personally is the mid system, which only has a black amp in the rear left compartment, which looks like and I would say its a fair bet is the same as this one from a bmw BMW LEAR E46 325i AMP Amplifier 65128383871 | eBay

The mid system to my knowledge only has one box of tricks in the back, and that's the above amp, which has no smarts, accepts 5v inputs and outputs to speakers in the doors and the center speaker. For all intensive purposes you could put in a standard amp, as there is 12volts, a power on line, and speaker lines, and 5v inputs, all you need, but you would either have to make up a few cross overs or find an amp with specific speaker outputs to match the low/mid/high range speakers. the aerial for the radio runs up to the front of the car and plugs directly into the head unit.

Once you start looking at the system with the nav screen there's lots of boxes of tricks in the back - I am not familiar with that setup.

I just had a look at RAVE and its a bit confusing, there may be the rear radio unit for the sat nav system, and it might be the same radio unit on the low line radio system. But on the mid system like mine, its incorporated into the head unit.

its easy enough to tell if your car has a mid system and is missing the rear amp, just grab the big multipin plug, look up the pin out in rave, measure the speaker pins and see if you get the correct ohm's values, measure the two 12v rails to see if ones always on and ones head unit switched, then check the inputs, easiest done with an analogue volt meter as like my car you will see the needle flapping about to the music.

**salty1960** · 10th October 2011, 07:08 PM

I will test the unit like you suggest, but I have a fivea on it being the poverty pack.
The wiring in the boot looks unused. - - the Powerful RR dude on youtube shows a HSE just like mine and point out that there is nothing in the rear compartment.

See :
Range Rover L322 HSE replacement head unit with Satnav DVD (Type

Sound system aside for now - -hows this for another twist of technology.

I charged the RR battery and tested that it started last night before I went to bed. All seemed well. Left it for the missus to use today. - -I get the phone call (hate those calls after I have been playing with car)

"I stoped to adjust the seats, etc and must have bumped the low range as now its says it's stuck in neutral" she says.

I get home and run quickly through the manual instructions for getting it out of some towing neutral techno bable. - -no luck, everytime I put the fuse back in No37 it causes the problem to come back.

I get home and read the threads and see that the fuse shouldn't be in 37!!!
Mia culpa ! I think I put it in last night whilst I was thrashing fuses around the cabin!!!!!!

This is a crash course in RR systems.

Stephen

**jx2mad** · 17th October 2011, 02:49 PM

My L322 seems to have the amp in the rear missing because there are a number of plugs floating around loose. However my radio works fine. Jim

**salty1960** · 12th November 2011, 04:05 PM

Well i think I lost the bet. The plug in the rear compartment (that wasn't connected to anything) appears corroded. I suspec the amp was pulled out when failed.
The radio works and I can listen to it with my improvised earpiece. So I am confident I just need to replace the amp.- - -But as per post above it has separate outputs to Front L & R, Front(tweeters) L&R, Back Doors Low Range L&R, and Back doors High range)

So I need to make sure the replacement amp has the correct crossovers to suit !!
I am not sure if there would be much difference between the E46 amp and a RR. - -I am guessing that the cross over & balancing of tweeters, etc is going to be slightly different. - -

Has anybody done this swap? - -Would I be better making up the cross overs and using aftermarket amps?

Any thoughts appreciated

**jsp** · 12th November 2011, 11:50 PM

I would bet its the same.......

**salty1960** · 13th November 2011, 09:01 PM

I might order that sucker and give it a try.

This site below details a similar amp operation - - not sure about the balancing of the different speakers still.

BMW E46 10-Channel Amp

It calls pin 10 as Antenna - - I guess that measn Attenna power ?
as the L322 manual calls pin 10 radio on!

The Ebay Item talks about might need reflashing. - -I wouldn't think these are programmable! Isn't it a dumb box?

**jsp** · 13th November 2011, 10:39 PM

Well the few I have looked at are just straight amps nothing more

tebone · 14th November 2011, 11:51 AM

Originally Posted by jsp

My car has the mid stereo, which is the stacker in the glove box and another cd player in the middle, above the lcd panel for trip computer and radio display. In the back passenger side compartment there is a black box with a big squareish plug, thats the amp. If you have the same setup as me, and you describe the exact same fault as mine, pull that black box out (bit of a bugger to get at some of the nuts) and trace the two power lines and earth, as most likely the permanent 12 volt line has a bad track underneath the plug on the sub-board and you will need to retrace it.

I have fixed 2 units with this fault now.

Hi JSP,
I am not sure if you can help me?

I replaced the amp in the 02 vogue and still didn't work but after a few days the DSP on the front lcd panel appeared and stereo worked fined.
Then it disappeared. The radio/cd only plays for 2 minutes than switches off. Then you turn stereo off/on and it works for another 2 minutes but the DSP will not display on the lcd screen. I've had the battery checked which was ok.

Have you any suggestions?

Regards Paul

**jsp** · 14th November 2011, 12:33 PM

Sorry if its the big screened vogue setup with satnav then I can't help you, its a rather complex setup and in my view more complex than it needs to be by a mile.

I got asked about an 05 with fibre connections the other day - again way over my head.

The mid system is great as its like a conventional car setup with low level outputs from the head unit and a bog standard amp in the back.

i believe the one in your car has a digital amp that does all fancy things like digital volume control where the head unit tells the ibus what volume it wants and the amp picks up from the ibus and does so accordingly etc.

tebone · 15th November 2011, 08:56 AM

Thanks anyway JSP,
Last night I disconnect the battery and waited 20 mins for a reset. I reconnected the battery now the radio doesn't work at all as before it use to come on for 2 minutes.
I been on other forums searching. No one seems to know the direct cause for the dsp not beening displayed. They suggest replacing amp, tv module etc etc $$$$. I already replaced the amp which the dsp did display after a week and than disappeared.

Who knows whats going on?

Regards Paul

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