jcadd wrote:Just been reading all the write ups about flashing 4x4 light
I have a July 2011 sr5 and my light comes on after 30 to 40 minutes of driving in 2 wheel drive every time I use it.
If I turn off the motor then back on the light stops flashing, drive another 30 to 40 minutes and it starts flashing again.
Sometimes the light won't come on when I engage 4x4
My Hilux has only done 4 shallow water crossings about 8 months ago and none since, about which time the problem started. And has given the same scenario ever since.
I've had it to Toyota 3 times and they can not find any code faults in the computer to indicate what is coursing the problem.
Sounds like from what I've read here that water getting in to the A D D (not sure what this stands for) is the problem,
I might bring this to the attention of my local Toyota Service Department tomorrow.
Thanks
Dave
rbass87 wrote:Ok thanks a heap for your help. The water would have been in there only for about 3 days until it was drained out, so I wouldnt have thought there would have been any corrosion damage or anything along those lines. Why does the sr5 have this system and not the sr?
mickgibbo00 wrote:I had similar problem with me MY12 SR5 D4D over the last 1-2 weeks.
The 4x4 light started flashing orange after about 2.5 days driving on a 5300km/6.5 day trip from Darwin to Wollongong.
Turning the ignition on and off or changing from 2H to 4H or 4L would remove the light but it would not stay off.
Looking on the forum I could only see issues with water in the A.D.D. being reported and the above item about shift being incomplete. As I breather extensions some time ago and the breathers weren't damaged I was reasonably confident it wasn't the A.D.D.
Throughout the rest of the trip the 4x4 light started flashing after 30 mins of ignition being on.
With a bit of testing the A.D.D and transfer case was working fine and we continued our trip to Wollongong including a little bit of time on Fraser Island where we used 4H and 4L without issue. When in 4H or 4L the light didn't come on.
With the ute booked in for a service at Toyota on Monday just past I asked Toyota to investigate.
Upon picking up the ute, the only comment I had was a low voltage fault which they cleared...possibly due to the dual battery setup.
On Tuesday the 4x4 light started flashing so I took it straight to Toyota while it was still flashing. After leaving the car for 2hrs I went back to hear that the 4L and 4H sensor in the transfer case was bad and needed replacing. To save costs I left in in over night (parts from Sydney) and with the vehicle not being ready to late Wednesday I picked it up this morning at a cost of $500.
This afternoon, 15 mins prior to Toyota closing for Christmas, the light came on again.
I took the car in and they stayed 1.5hrs investigating and offered a courtesy car. In the end the installed a temporary replacement 4x4 Computer Control Module to see if it solves the issue.
Hopefully we find a solution soon.
Has anyone else there had the issue which wasn't caused by water in the A.D.D?
Thank you and I hope this assists others.
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