I bought my GC 2007 limited crd around a month ago from toyota had the service 4wd system message toyota gave it to jeep who informed my wife they reflashed firmware great get home test low range and it worked........ go bush on the weekend inthe snow try to engage low and low and behold service 4wd system and no action from the selector motor spent the day only driving where toyotas could go in high range
anyway tonight i decided to try this trick it is from this thread somewhere but also found it on a us forum. i have engaged and disengaged low seven or eight times so far to see if it worked so far so good
. message on jeeps facebook page from Andrew Buckwell.
1. Turned my car on (engine running) checked that the 4wd service message was still occurring when I pulled the low 4wd)
2. turned my car off keys out. opened the bonnet.
3. Went to the fuse box under the bonnet took fuse labelled fdcm/ediff out.
4.Shut bonnet, got in my car started it with the fuse out put it in drive, drove 2 meters forward then put it in reverse drove 2 m backwards (be aware you will get the service 4wd light without pulling up the lever as you are driving).
5. Turned my car off keys out, went to the bonnet put fuse back in and shut bonnet .
6. Started my car put it in drive got the car rolling just below 5 mph (as this makes it easier to activate low 4wd -- read manual) put it into neutral while rolling and pulled the low 4wd switch -- it worked