When the light comes on after blinking for 1 minute: Malfunction in the tire pressure warning system. Stuck in 4wd and the light is flashing 4lo. 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. The only line I found on the actuator is about 6 inches long and goes to a small line, which I thought was a vent tube after tracking it. However, the starter eventually failed. When I push the 4wd hi button, light flashing without engaging. my 2002 toyota tundra 2wd/4hi light started blinking when i tried putting it back into 2wd after the last time is used the 4wd. Have the vehicle inspected by your Toyota dealer immediately. Yellow 4lo constant flashing. It sounds like you need to check the ADD indicator switch on the front axle. The "clang" I normally heard when my 4WD engaged is absent. 4wd hi light flashing, but will not engage. I put it up on jacks to … - I began noticing intermittent issues with the 4HI/4LO and/or the VSC OFF lights flashing (also accompanied with a solid traction control warning light) which started the first winter I owned the truck and seemed to happen when the truck was cold and would often go away once warmed up. ... Toyota Tundra Forums. I have an 06 and it’s stuck in 4x4 won’t come out and the 4lo and 4hi is flashing . When the light comes on: Low tire inflation pressure such as. Actuate ADD--light still blinking until ADD indicator switch closes, then turns on solid. When I had the 2WD/4HI/4LO switch slightly past the 2WD part, it was flashing the 4HI and 4LO lights. I've read that it is probably something to do with the transfer case actuator. Just to add a note about things that result in the 4hi and 4lo lights flashing, my 2010 5.7 SR5 did this a couple of times, then the starter failed. Just happened, tried switching - Answered by a verified Toyota Mechanic The sequence that the 4WD ECU goes through is like this: Actuate 4HI--light blinks and ECU waits until 4HI indicator switch closes. Tundra 2009. The flashing light was gone as soon as I started the truck after the install. Tundra Solutions Forum - the best community to talk, mods, price, repair and research your Toyota! Mark helpful. The indicator light stops flashing after the ENGINE START STOP switch has been turned to ACCESSORY or IGNITION ON mode to indicate that the system has been canceled. 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. Natural causes; Flat tire; Immediately stop the vehicle in a safe place. - 2005 Toyota Tundra 4x4 ex cab. After some rough driving on some mountain roads, I discovered my 4WD isn't working. 2009 5.7L Rock Warrior, Black, cold/ tow package. ... 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