00imolaM5

Hello,

Somwhat new. I have a Nav problem, I have posted before and just now getting around to looking into correcting this problem.

My Nav is tracking 180 deg out. i.e. Going north, the map tracks south.

I cant remember who, but some kind gentlemen advised for me to check the wheel sensor wiring. Any other possibilites come to mind? Of course the Dealer wanted to sell me a new Nav System. We I am a definate newbie, however with some mechanical skills. I maintained my Volvo, but my first BMW (M5) is a bit more sofisticated. So any advise, instructions or ideas would be appreciated as I tool up to do some maintenance this weekend. I guess a good place to start would be which sensor and wheel ? .. Ok, dont hit me too hard, I do have the Tis disc, but have not found any data concerning this yet.

Hank
South Louisiana
2000 Titanium M5
2000 Imola Red M5 (project)

DouglasABaker

Hi Hank,

Sounds like the reverse indicator wire is wired to the wrong place.

Go into the Nav service menu: Menu, Settings, press and hold Menu. In there (under functions, I think) you'll find a setting for wheel speed sensor.

You need to make sure it is positive when you are going forward and negative when you are going backwards. Obviously it should change from 0 when you are moving.

If it is always 0 (it won't be, but just in case) then you need to move the wire in pin 11 (brown wire w/ red stripe) of the purple harness into pin #10.

If it is just the wrong sign, then you need to check pin #1 of the harness. It should be ~6V when you are in reverse, and 0V when you aren't. It is supposed to be wired to your back-up lights, but I'm afraid I can't tell you where specifically...

Hope this helps,

Doug

ard

Have you checked the GPS antenna connections?

Also, you might consider picking up a Mark 3 Nav unit for real cheap- folks upgrading to the Mark4 will let them go reasonably.

00imolaM5

Thanks, I will check this out ! Btw, I did not mention that the previous owner upgraded to 16X9 Mk IV. And it has probably never worked correctly since the upgrade.

DesiOC

I am actually having a problem with my NAV. Every time I try to go to the NAV menu, it goes into "thinking" mode and never succeeds getting into the NAV secton. If I go back to the main menu then it does not allow me the option of the NAV again, untill I restart the car.


I have tried to eject the NAV disk but, to no avail.


Any pearls of wisdom to sort out my possessed NAV.

Cheers,
Manu

__________________
(oOO\(llll)(llll)/OOo)


2001 BMW M5
2005 Honda S2000
2005 VW Touareg

"Never let weekness convince you of lack of strength"

richie_rvf

Possibly a stupid question but are you sure you have selected the option to point the map in the car direction as opposed to tracking north?

If you have it set to track north then if you head south the car will appear to go the opposite way on screen.

@ Manu, you could try to do a software upgrade, or maybe a full re-boot by disconnecting the battery.

DesiOC

Thanks Richie,

Disconnecting the battery did not seem to help, it there any other way to eject the NAV CD?

__________________
(oOO\(llll)(llll)/OOo)


2001 BMW M5
2005 Honda S2000
2005 VW Touareg

"Never let weekness convince you of lack of strength"

richie_rvf

You sure there is a disc in there?

How long did you disconnect it for, I think that can have a bearing, at least half an hour apparently.

You could also try holding your finger on the eject button for some time.

DesiOC

If I leave the battery disconnected for 30mins are there other implications?

RE: Finger on the eject button untill it went blue, no luck!

__________________
(oOO\(llll)(llll)/OOo)


2001 BMW M5
2005 Honda S2000
2005 VW Touareg

"Never let weekness convince you of lack of strength"

DouglasABaker

No issue with disconnecting the battery except you will need to reset the time / date and you will lose your trip odometer.

Sounds to me like your Nav unit is on the way out. Can you borrow someone elses MK3/4 to try in your car and make sure it is ok?

d-

DouglasABaker

I'll post the solution once more: Go into the diagnostic menu and check your wheel speed sensor.

If it is positive when you go forward and negative when you are in reverse, then you need to learn how to use your Nav unit

I suspect you'll find it is negative going forward and positive in reverse, which means that pin#1 of the magenta harness is not getting a 5+V signal when it should (which is when the reverse lights are on).

The only other option is that your Nav unit needs to be replaced, but I'd check the wheel speed sensor first.

btw - you asked which wheel: Front Left.

d-

00imolaM5

I did the sensor check as advised and it all appears to work properly. But it reveled possibly where the problem is.

This is what the system shows

Sats 00
GPS Reciever Error

Im assuming since the moving map works but is 180 out, that maybe the nav unit has gone kerplunk. A couple of questions,

Any other trobleshooting im missing?
If the Nav unit is bad, is there anyone who repairs them?
If I have to replace the Nav reciever, what items are required to move up from the MkIV to a later generation.

Thanks for the help !