What the heck does that tow haul button do besides sitting there waitting for me to press it, and depress it all the time? Is there a real purpose for this, or is it just one of those things you dont really need? Any help?
I believe that it merely changes how the transmission is controlled. If you believe what you read here, it merely changes shift points. I don't know if it changes when the coverter is locked/unlocked, or any fuel or timing maps. The vehicle is so new it's hard to find good info.
I believe that it merely changes how the transmission is controlled. If you believe what you read here, it merely changes shift points. I don't know if it changes when the coverter is locked/unlocked, or any fuel or timing maps. The vehicle is so new it's hard to find good info.
Its not like Toyota would put it in the Owner's Manual or a salesman should know what he's selling and explain it to you. It's disappointing to see the amount of basic vehicle functions that have obviously been overlooked by salespeople on here.
Tow/Haul changes the shift points in the transmission so that each gear holds longer. It also quickens your throttle response. The advantage is that if you are hauling a trailer you won't have to shift as often and you'll have a little more power.
__________________
Tundra Truck Pro
MODS: Line-X, Sirius, Dual Flowmasters
Its not like Toyota would put it in the Owner's Manual or a salesman should know what he's selling and explain it to you. It's disappointing to see the amount of basic vehicle functions that have obviously been overlooked by salespeople on here.
Tow/Haul changes the shift points in the transmission so that each gear holds longer. It also quickens your throttle response. The advantage is that if you are hauling a trailer you won't have to shift as often and you'll have a little more power.
Most sales people have no idea but truckman261 is right on the money... The Tow/Haul also downshifts more aggressively when slowing, using the engine to help slow the truck("engine braking").
Customers always tell me "that switch just turns the overdrive off"
I just smile then on the test drive I show the customer the difference the Tow/Haul makes and then they will usally agree.
Thanks guys, thats what I thought it does, the day I bought my Tundra I was so excited about my new truck I probably didnt listen to him anyways, my owners manual is in my truck with my "wife" I was just wondering about that this morning so thought I would ask, thanks very much.
I'm surprised there aren't more people that share the love for the Tow/Haul button. It's my favorite button! I drive real curvy, fun roads though Rancho Santa Fe everyday. I really appreciate the quicker response, and assisted braking.
There are some things to be aware of when using the tow/haul mode.
1st, the tow/haul mode does not work in "S" mode, only in drive.
2nd, Tow/haul mode changes the changes the shift points in all gears when up shifting from 1-6 th gear.
3rd, when down shifting the shift points are changed with tow/haul mode from 6th-5th, 5th-4th and 4th-3rd gear, no changes in downshifting in the other gears.
There are some things to be aware of when using the tow/haul mode.
1st, the tow/haul mode does not work in "S" mode, only in drive.
2nd, Tow/haul mode changes the changes the shift points in all gears when up shifting from 1-6 th gear.
3rd, when down shifting the shift points are changed with tow/haul mode from 6th-5th, 5th-4th and 4th-3rd gear, no changes in downshifting in the other gears.
This is good info! I've been towing around my little utility trailer the past two weekends - it's about 1000 pounds, plus had it loaded with about 1500 pounds - and I was using S4 with TOW/HAUL on. It seemed to not do much.
But, now I'm confused! The manual seems to indicated that you should tow with the S mode. If that's so, what's the point of the tow/haul button?
I'll have to play with tow/haul on the way in to work tomorrow with nothing behind it...
This is good info! I've been towing around my little utility trailer the past two weekends - it's about 1000 pounds, plus had it loaded with about 1500 pounds - and I was using S4 with TOW/HAUL on. It seemed to not do much.
But, now I'm confused! The manual seems to indicated that you should tow with the S mode. If that's so, what's the point of the tow/haul button?
I'll have to play with tow/haul on the way in to work tomorrow with nothing behind it...
thanks much,
ben
In S mode, it lets you control the transmission to get the most out of each gear. In Tow/Haul mode, yes it changes the shift points to hold in each gear longer and get better take offs, but the main benefit is that it lowers the point when overdrive kicks in. That way when going up and down hills or different elevations, there is less gear hunting and therefore much better fuel economy while towing, because we all know MPGs go down when you have a load behind you.
__________________ Adam Dunker Internet Sales Manager
2007 CrewMax SR5 4x4 Slate Metallic, Headrest DVDs, Spray-in Liner, Bull Bar w/KC Titanium Driving Lights, Black Nerf Bars, 3" Toytec Lift, BF Goodrich T/A KO All Terrains, aFe Cold Air Intake, Gear Alloy Wheels, OEM Fender Flares, Pace Edwards Roll-Back Cover
Oh, I forgot. I wanted to agree on the lack of knowledge seemed to be passed between salesperson to customer on their truck. I know not all areas of the country are "truck" towns, but a basic knowledge of what a person sells would seem to help when someone wants to buy one. I always spend a good 30-45 minutes demonstrating the vehice and the features to each customer(I just love to show the difference between our truck with Trac turned off and on). At delivery, I spend probably another 20 minutes making sure the customer knows how to work everything and ask three to four times before they leave if they have any questions. I know it is a lot to take in at one time, but I tell them not to be ashamed it they have questions about their vehicle, as I do the same sometimes, and I am trained on them.
__________________ Adam Dunker Internet Sales Manager
2007 CrewMax SR5 4x4 Slate Metallic, Headrest DVDs, Spray-in Liner, Bull Bar w/KC Titanium Driving Lights, Black Nerf Bars, 3" Toytec Lift, BF Goodrich T/A KO All Terrains, aFe Cold Air Intake, Gear Alloy Wheels, OEM Fender Flares, Pace Edwards Roll-Back Cover
General
During tow/haul control, the ECM controls the engine output, transmission shift schedule and shift timing to ensure drivability when a trailer is towed. The tow/haul control includes a throttle control, shift schedule control, wide open throttle shift timing control and AI-SHIFT control.
** The conditions required for tow/haul control to operate are as follows:
- Shift position: D position (Tow/haul control does not operate in the S position).
- TOW/HAUL pattern select switch: ON
** The TOW/HAUL indicator light is used to inform the driver that tow/haul control is operating.
Throttle Control
Throttle control changes the relationship between the accelerator pedal depression angle and the throttle valve opening angle.
** During tow/haul control, the throttle valve opening is increased by throttle control. As a result, acceleration performance is ensured.
Shift Schedule Control
The shift schedule control changes the upshift and downshift schedules during tow/haul control.
** For the upshift schedule, the upshift timing is changed to higher vehicle speeds, enhancing the use of lower gears. As a result, drivability is ensured.
** For the downshift schedule, the downshift timing is change to a wider throttle valve opening angle, enhancing the use of higher gears. As a result, the frequency of gear changes is reduced, allowing optimal shift quality.
Wide Open Throttle Shift Timing Control
Due to wide open throttle shift timing control, upshift timing is delayed to make use of high engine power when the accelerator pedal is fully opened.
** Wide open throttle shift control operates in 1st, 2nd and 3rd during tow/haul control.
11. AI (Artificial Intelligence)-SHIFT Control
General
In addition to shift pattern changes due to tow/haul control, AI-SHIFT control determines optimal transmission control based on input signals and automatically changes the shift pattern. As a result, a high caliber of transmission operation is achieved.
** The AI-SHIFT control includes a road condition support control and a driver’s intention support control.
** AI-SHIFT control is effect only with the shift lever in the D position, based on the accelerator and brake operation data. AI-SHIFT control will be canceled when the driver selects the S mode.
Road Condition Support Control
Under road condition support control, the ECM determines throttle valve opening angle and the vehicle speed whether the vehicle is being driven uphill or downhill.
1) When a trailer is not being towed:
** To achieve an optimal drive force while driving uphill, this control prevents the transmission from up-shifting to 4th, 5th or 6th gear.
** To achieve an optimal engine braking effect while driving downhill, this control automatically downshifts the transmission to 5th, 4th or 3rd gear.
2) When a trailer is being towed:
** To achieve an optimal drive force while driving uphill, this control prevents the transmission from up-shifting.
** To achieve an optimal engine braking effect while driving downhill, this control automatically downshifts the transmission.
** In addition to the shift pattern changes due to the road condition support control, the shift pattern is further changed when the tow/haul control is turned ON.
Driver’s Intention Support Control
1) When a trailer is not being towed Driver’s intention support control estimates the driver’s intention based on the accelerator operation and vehicle condition and selects a shift pattern that is well-suited to each driver.
2) When a trailer is being towed During tow/haul control operation, the driver’s intention support control ensures drivability while towing a trailer by determining the driver’s intention based on accelerator pedal operation and vehicle condition and performs the controls shown below:
Control= Sudden Accelerator Pedal Depress Control
Operation= When the driver operates (presses) the accelerator pedal quickly, this control causes the transmission to downshift rapidly to improve acceleration response.
Available for= 4th to 6th
Control= Sudden Accelerator Pedal Release Control
Operation= When the driver releases the accelerator quickly, this control makes it easy for the transmission to hold the gear, which improves engine braking force and re-acceleration response.
Available for= 3rd to 6th
Control= Sudden Deceleration Downshift Control
Operation= When the driver decelerates the vehicle suddenly, this control downshifts rapidly, which improves engine braking force and re-acceleration response.
Available for= 3rd to 6th
Throttle Control Throttle control changes the relationship between the accelerator pedal depression angle and the throttle valve opening angle.
** During tow/haul control, the throttle valve opening is increased by throttle control. As a result, acceleration performance is ensured.
Ha!! I knew it messed with the Throttle Body, I just could never remember where I read it. A new button to push when I want to go faster...
Tow/Haul button
07 Salsa Red Pearl 5.7 DC..TRD, Leather, JBL radio.
Linear Mode
