Hi,

After changing my alternator and front diff I got the following fault message:
Transmission range chane not available.

I connected my obd reader and the error is 0902 clutch actuator-circuit low.

The battery was disconected for 2 weeks prior to new alternator fitting.


Any clues?

Thanks in advance.

I wonder if the removal of the battery for 2 weeks has caused the transfer box control module to forget its calibration? You should probably get it looked at by a suitable garage in case it's something more involved though.

The method for calibrating the transfer box control module (on the D3 at least) is:

Quote:

Clutch and Range Change Mechanism Calibration
In order for the range change mechanism to function correctly, the transfer box control module must be calibrated to the
mechanical dimensions of the transfer box that it is connected to.

This procedure will need to be followed if one of the following occurs:

. The vehicle is first assembled
. The switch is changed
. The transfer box control module is changed
. The transfer box or range position sensor is changed
. Vehicle or transfer box control module fault has caused the transfer box to revert to an undefined range.

Calibration can be carried out using the service tool or by following this procedure:

. Switch ignition to position II without the engine running
. Select automatic or manual transmission neutral
. Depress the throttle pedal fully
. Press and hold the range change switch for 5 or more seconds to allow calibration to start
. When the calibration is heard to start, the switch and throttle pedal can be released
. Upon adopting high range, start the engine and wait 30 seconds while the first calibration of the clutch in high
range is done. While this calibration process is in progress, no shifting is accepted
. Switch ignition off and wait 15 seconds
. Start engine
. Perform a range change to low range. Wait 30 seconds while the first calibration of the clutch in low range is done.
While this calibration process is in progress, no shifting is accepted
. Switch ignition off and wait 15 seconds
. Range and clutch calibration is now complete.

Thanks for the reply,

No luck with the calibration, so tomorrow I will go to a LR dealer to see what they say about the error codes,

ECU, actuator motor, solenoid or position sensor one has to be!

Regards

New transmission ECU and new actuator motor solved the problem.

Now I have a dilemma... left the car in a friend's garage to change the alternator and front diff and he returned the car with the transmission fault, 30 miles more on the odometer, the terrain response knob was up and they washed the engine bay.

He wasn't able to fix the fault so I left the car in the Land Rover dealership to solve the problem.


Who do you think should pay the bill at the dealership?

Regards

Are you sure it was the transmission ECU that was changed and not the transfer box ECU? The transfer box ECU is in the engine bay behind the battery and can easily be drowned if the engine bay is washed because the water protection isn't very good. The transmission ECU is actually inside the gearbox so to change it requires draining the box, then the ECU change then refilling the box with £200+ worth of special ZF transmission fluid. 2008 MY Java Black TDV8 HSE

Yes, it was the transfer case ecu that was replaced.

Well I'd have a frank discussion with your friend then. Looks as if he may have got the ECU wet when he washed the engine bay. The other parts probably didn't need to have been changed but franchised dealers do tend to change multiple parts first without going step by step. 2008 MY Java Black TDV8 HSE

They first changed the motor which they tested first and was faulty.

Tomorrow I will talk to him and see how things are going to be solved.

Thanks

Hi, I am sharing my experience, a few years later this post, in case it can help others. (05 RR Sport)

Same inicial problem, alternator gone and loads of error messages once the new one was fitted. My local garage changed the alternator and managed to get rid of most of them apart from a transfer and suspension errors (see picture attached). He could get no further and recommend me to take it to the official LR garage to diagnose these errors.

Click image to enlarge

The described procedure from RRSTDV8 has fixed my RRSTDV6 (2005) completley!
...tank YOU!