Thread: Stuck in low range

I'm pleased to report mine is working again but not without some grief from a second hand ECU I purchased out of UK as "in working order when removed from the car"......sounds familiar? Before putting it in my car I decided to remove the cover, and sure enough there were signs of getting very hot. On seeing the singe marks on the board I decided not to risk it and have since purchase the most recent version locally here in Perth.

Finallyrangie, have you taken the cover off the ECU as a visual inspection?

Well done, glad you managed to get everything working again.

I've had the cover off of three of the ones I've got, there doesn't seem to be any visual evidence of any problems, but I am happy to admit I'm no Electronic genius, the pictures I've seen of damaged ones on the Web do seem to be quite blatant though.

I'm not going to give up, just not sure how to proceed.

Originally Posted by finallyrangie

Well done, glad you managed to get everything working again.

I've had the cover off of three of the ones I've got, there doesn't seem to be any visual evidence of any problems, but I am happy to admit I'm no Electronic genius, the pictures I've seen of damaged ones on the Web do seem to be quite blatant though.

I'm not going to give up, just not sure how to proceed.

Where are you taking your voltage measurements from?

I have a trouble shooting guide downloaded from somewhere, the 12v going in and all the earth connections seem to be correct, there are 4 larger wire connections in pair above and below the 12v input wires, these I believe power the transfer case motor in each direction, one pair clockwise, the other anti clockwise, these according to the paperwork should be either 0 or 12v, which seems perfectly logical, except they give 7.9v out of all 4, apparently all the time.

This suggested to me that the ecu was cactus, but I now have 4 that all give the same result, so I'm trying to figure out what could cause that outside of the computer.

I have a trouble shooting guide downloaded from somewhere, the 12v going in and all the earth connections seem to be correct, there are 4 larger wire connections in pair above and below the 12v input wires, these I believe power the transfer case motor in each direction, one pair clockwise, the other anti clockwise, these according to the paperwork should be either 0 or 12v, which seems perfectly logical, except they give 7.9v out of all 4, apparently all the time.

This suggested to me that the ecu was cactus, but I now have 4 that all give the same result, so I'm trying to figure out what could cause that outside of the computer.

Okay, rather than keeping on with the same thing, could it be a problem with the speed sensor on the transfer case?

I'm looking for other possibilities, as I've tried the ecu and motor change and got nowhere.

Is that the 2 bladed sensor on the back of the transfer case or is that a temp sensor?

So many sensors butit can't tell me what's wrong!

I'm not sure what documentation you have. But here are the extracted pages from RAVE. Good luck!

Thanks for the documents, almost the same as the ones I've got but it never hurts to read it again.

I'm waiting for a new speed sensor to get here this week and I will try that, this issue might have to take a back seat as the dreaded death wobbles appeared at the weekend, it never rains!