What he said ^^^^^^ Plus check what voltage you have at the battery with the engine at 2K rpm.
Check the connectors for corrosion.
And the ECU
Diagnostics
Great info as usual Phil, but if the solenoid has to be energised to remove it, what happens if the solenoid is faulty and cannot be energised?As a short circuit in the solenoid wiring is given as a possible cause for both these error codes, it might be worth checking this out first, including testing the resistance of the solenoid itself.
A resistance check between terminals 9 & 12 at the (largest) ECU connector (when disconnected, obviously) should give a result between 0.2Ω and 10.0Ω.
In case you thought you might remove it, note that the solenoid must be energised for it to be removed/replaced otherwise you won’t be able to engage/disengage it from the shift fork.
https://www.rangerovers.net/threads/magna-steyr-dd295-transfer-box-teardown.41233/#post-349450
Phil
That’s a good point. I suspect the most difficulty you would have is when installing it, rather than removing it. When I did the teardown post shown in the link above, I managed to get the solenoid out without energising it, but it needed a lot of fiddling. That was with the transfer box conveniently sat on a workbench, and I wouldn’t fancy trying it lying under a vehicle with fluid dripping down my arm. For getting it back in you would, of course, be able to energise it because you wouldn’t be re-installing a faulty solenoid. Apparently, there is a diagnostic service function included in 'approved diagnostic equipment' called “transfer case – solenoid replacement” which energises it for you once you’ve plugged the solenoid connector in.
Thanks Phil. I have to say that seems to be a crazy bit of design
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