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Transfercase problem
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Posted 3/17/2015 5:19 PM
ADDE4x4
Member




Date registered: Oct 2014
Location: Sweden , Norduppland, Gimo
Vehicle(s): Look below
Posts: 10

Transfercase problem

Hi

I am having  problem with my G400-02 that i hope someone can help with.

The probem have incurred a few times and starts with the cars engine stops and the varning "transfer case in neutal" shows.

when i have pulled at the cables to the TC th problem have disappeared but now it is constant.

I have changed the cables between the TC and the controlbox and allso the grownd cabla that was rusted away.

how do I find the problem 

can Mercedes se if the controlbox for the TC is ok or if the problem is in the electric motor in the TC?

Why do you need to program the control box and the electric motor in the TC after a change.

 

/ Andreas

 

#227285
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Author
Posted 3/17/2015 6:26 PM
NHDave
Extreme Veteran




Date registered: Dec 2013
Location: Seacoast NH.
Vehicle(s): 2004 AMG
Posts: 464
300
Re: Transfercase problem

Seeing how your ground wire was rusted away and replaced, the control unit may have lost contact with the shifter motor, it might need to be reestablished using Star/Das. Just like adding a new shifter motor, it needs to recognized once again.
Seems it's the simplest option at the moment. After that, it could be the motor or the control module.
Best of luck
NHD
#227290 - in reply to #227285
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Author
Posted 3/20/2015 5:50 PM
ADDE4x4
Member




Date registered: Oct 2014
Location: Sweden , Norduppland, Gimo
Vehicle(s): Look below
Posts: 10

RE: Transfercase problem

Problem solved
Just needed to erase the errorcodes in the TC and autommatic transmision (over 250 errors for CAN interution).

/ Andreas
#227339 - in reply to #227285
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Author
Posted 3/20/2015 9:28 PM
fernweh



Date registered: Apr 2006
Location: Calabasas, CA - Centenario, BCS - Luebeck, Germany
Vehicle(s): Few Mercedes-Benz, a Toyota Amphibious and a Vespa
2000
RE: Transfercase problem

ADDE4x4 - 3/20/2015 2:50 PM

Problem solved
Just needed to erase the errorcodes in the TC and autommatic transmision (over 250 errors for CAN interution).

/ Andreas


The TC control unit needs to learn the position of the shift motor.
I believe it can be done, by holding down the shift button a bit longer than necessary, for both modes HI & LOW.

The replacement of that short harness, between the shift motor and the control unit, eliminated my TC problems. Most the time it is a CAN bus communication error (bad connections), and concerned owners
start replacing the shift motor and/or the TC control unit....for nothing.

Karl
#227343 - in reply to #227339
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