The actuator is what signals the light to turn on or off. While you have to manually turn this feature on and off, once it is on, it automatically detects wheel spin and distributes torque between front and rear wheels to suppress unnecessary wheel spin and control skidding. A-TRAC stands for “Active Traction Control” and comes standard on some of Toyota’s 4-wheel-drive models. Tundra 4wd Actuator Problems - YotaTech.com; Tundra 4wd Problems - YotaTech.com Hi folks, My 2015 Highlander XLE with 52k miles is completely stock, nothing but scheduled service (except for the external temp sensor that was swapped by the dealer), just threw a CEL and displayed TRAC OFF and Check AWD System on the dash display. The problem is that the ABS light is on, Traction light is on and 4Hi and 4Li are flashing in any position 2WD, 4Hi and 4Lo. ... 2007 4.7l toyota tundra, vsc light flashing, engine light on, ... My toyota tundra 2008 check engine light, TSA off light, 4Lo light and the traction control symbol light all came on this morning when I started the truck. Related Discussions. Very slow off line and would go up to abot 55 or 60 mph. toyota tundra 4 wheel drive light flashing. I have a 2007 Toyota Tundra and the "vsc off" light stays on and the 4 wheel drive Hi and lo light flash. If you get leaks or the unit fails to engage, the actuator will need to be replaced. Although my truck did not die on me I had the same weird flashing lights. It may light up for a brief period and then go off, or it may flash while it is operating. The the next day I get in it it comes back only this time I had no power! If I try to drive the truck it won't go over 30-35 mph. If your fluids are in good shape and the light still won't go off, move on to Step 2. It is common for the traction control light to come when the check engine light on your Toyota comes on. Just fix the check engine light problem, and your Trac Off light will reset as well. All lights came on at the same time. Next, test for four wheel drive by repeating the steps on the passenger side. The TCS warning light will pop on when the system detects a loss of traction, like in snowy or rainy weather. failure Late model Tundra, Tacoma, FJ Cruiser and 4Runners equipped with part-time 4WD are, especially at higher mileage, more susceptible to 4WD failure than their older brethren. Won't shift into 4wd, traction control is clearly not working and neither is the ABS system. the transfer case is not coming all the in or out of 4wd sometimes you can tap on the transfer with a hammer in front or around the the black box located on the transfer case The actuator should hold the pressure without leaking. Traction button held for another 3-5 seconds (sliding truck OFF light and TRAC OFF light): No controls. Traction button held for 3-5 seconds (Auto LSD light comes on as well as sliding truck OFF light): If the computer detects wheel spin, engine output will NOT decrease. The traction control gets disabled, but that doesn't mean a problem with the Trac system. 4HI/4LO lights flashing, Traction Control light is on (indicating traction control is off) and ABS light is on. If i remeber right mine had 4 lo light on, VSC off light on and somethin else but it wasnt a check engine light. Same thing happening here. Typically the light is seen when the system intervenes to maintain traction. I was freakin out. Trac Off and Check Engine Light on Toyota. Home; Uncategorized; toyota tundra 4 wheel drive light flashing so i unhooked the … read more Step 2 – Check your actuator. 2011 Tundra … A faulty actuator not only signals your 4WD system to engage and disengage, it also serves to turn the 4WD light on and off. 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