What does it mean when 4WD is flashing?
A lot of the time, a flashing 4WD light is no reason to be alarmed, because it simply means that the system is working as designed. On vehicles where four-wheel drive is only activated on demand — that is to say, when traction conditions require it — this light shows up to tell you that it’s been activated.
How fast can you drive on 4HI?
The owners manual will clearly tell you not to drive in 4 wheel drive on “clean, dry pavement”. There is no maximum speed while in 4HI but in 4LO the fastest you should go is 45 mph.
Why is the 4 wheel drive not working on my Toyota Tundra?
Didn’t use the 4 wheel drive for the past 6 months and when I pushed the 4Hi button, all I get is flashing light and NO 4 wheel drive. Followed the suggestions on this thread to no avail. There are distinct sounds of the actuators trying to engage / disengage when the buttons is engaged / disengaged.
What to do if your Toyota Tundra actuator is not working?
Have a friend push the 4WD button while you are doing this. Oftentimes, this will get the actuator working again, and if it does, be sure to use 4WD a few times in the following days to keep it from sticking again. Figure 1. Try manually engaging the actuator first. If your actuator still isn’t working after a little tapping, move on to Step 2.
How to test for vacuum in two wheel drive Toyota Tundra?
Check for continuity on your ADD relay between terminals 2 and 6, as well as 1 and 3, and apply 12 volts of continuity between terminals 1 and 4. If the relay fails these tests, it will need to be replaced. To test for vacuum in two wheel drive, disconnect the two hoses and put a hand vacuum pump on the driver’s side, then apply 15 lbs of vacuum.
How often should I put my Toyota Tundra in 4WD?
It ended up being around $2500 and took about 3 days. It works now and the told me that I need to put it into 4wd at least once a month for just a little bit to keep that actuator switch active and avoid corrosion. Bilstein 6112/5160 trd sway bar and ride rite bags.