Mk3 to MkIV Upgrade Problem (or ..have I bought a lemon?)

Riggers · #1 05-16-2007, 01:09 PM

Hello,
The problem I have is regarding installing a MkIV Nav computer in a 2002 Range Rover..... I know, I know, please be kind!
I bought a MkIV from Ebay & swapped it with the existing Mk3 in the car. Now the computer screen remains blank (black) all the time. ie when I open the car door, put the key in the ignition to the R position or start the engine.
The MkIV unit does have the red power light on & it makes no difference whether I have the Nav disk in or not.
If I replace it with the Mk3 unit all works normally.
Is it .....

off... or

....

Any help / ideas gratefully received!

Thank you.

Riggers
Range Rover Vogue 2002

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Brian-bmw · #2 05-16-2007, 01:51 PM

If you never see the red power light on the MKIV, it may be dead. At least it accepts and ejects the disks, which means it is getting power.

Another possible scenario is that the MKIV is coded for the monochrome system. A smart dealer can re-code it, or you can search-out a couple threads on this forum that explain how to modify the OS update disk to force it to load the OS for the color nav system.

KiwiJochen · #3 05-16-2007, 03:19 PM

I can help ypu re-code it.
If the Mk4 is a BMW nav drive, you may need to re-code it in a BMW, as it detects vehicle type and loads the software according to vehicle type.

So I can point you to how to load BMW software onto the unit, and how to re-code it to colour operation when in a BMW.

I am not sure what will happen in a Rover!

To recode it, you will need an ibus interface and a special version of my NavCoder software

Riggers · #4 05-16-2007, 03:27 PM

Brian-BMW,
Thank you for your VERY quick response!
Since my post (& before I read your reply) I have powered down the car, disconnected the battery (neg first then Pos) & left it for 5 minutes then reconnected. Still nothing.
Red power light is on but Computer screen stays blank/black.
Before the power down I briefly got a light blue screen with all the functions, except Navigation, showing but as I turned the selector knob to the SET position the screen disappeared never to be seen again!
Does that infomation help at all?
Is there any way of checking if the MkIV unit is a monochrome one or not or definately needs re-coding as I could always return the unit to the seller.

Thank you.

Riggers
Range Rover Vogue 2002

Riggers · #5 05-16-2007, 04:33 PM

KiwiJochen, thank you for your reply.
Please see my reply to Brian-BMW..... do you think that re-coding would be the answer?

I've had enough playing with cars tonight, time to:

Riggers
Range Rover Vogue 2002

KiwiJochen · #6 05-16-2007, 04:53 PM

Hi, recoding will fix it.

To confirm that the nav is functional, watch the red power light on the nav.
Exit the car, turn key off, shut all doors but leave boot open.
Observe red LED on nav. it will blink, and after 60 seconds, will blink rapidly, then go out.

Then use your key to unlock the car, or open a door. Look back at the nav. Has the red LED come back on?
If so, then the nav has recognised and responded to the 'wake up' message on the databus.

If the nav powers down and wakes up OK, then this indicates the nav CPU is working fine, and the databus interface is fine.

If the red LED glows steady and never blinks, the nav main board is faulty.

If you have confirmed the CPU is OK, remove the nav and look for a label with a chassis number on it. Often the nav coding is printed on this label BMWC01S = colour, BMWM01S = monochrome

If CPU is OK and nav is coded for mono, then a recode will fix it.

Jochen

Riggers · #7 05-16-2007, 04:59 PM

Cripes... you guys are quick replying!
I'll run through that sequence in daylight tomorrow but from memory the light sequence runs exactly as you said & the code on the unit that I remember seeing was "BMWNRR...." but I will confirm tomorrow.

NINCHS · #8 05-16-2007, 07:34 PM

just a thought. what side of the drive is the eject button on? Some people sell MK4's on ebay that are out of a 7-series and the eject button is on the opposite side. The drive is also a bit thicker than the Mk3.

I have read that these drives wont work. I dont know if they are Idrive or what but some MK4's on ebay are not a plug and play swap.

Riggers · #9 05-17-2007, 12:56 AM

As you view the front of the drive, the eject button is on the left hand side. Which, I think, is standard?

NINCHS · #10 05-17-2007, 01:56 AM

Quote:

Originally Posted by Riggers

As you view the front of the drive, the eject button is on the left hand side. Which, I think, is standard?

if it looks like this you are cool.

http://cgi.ebay.com/ebaymotors/BMW-M...spagenameZWDVW

This is the wrong one. Sometimes sold as a MK4 on ebay:

http://cgi.ebay.com/ebaymotors/BMW-D...em260117581282

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