Toyota tundra no throttle response

Toyota tundra no throttle response DEFAULT

NOTE Electronic Throttle Control System ETCS may also be referred to as Electronic Throttle Control System Intelligent ETCSI or ETCSi

Last Updated on Thu, 30 Sep 2021 | Toyota Sequoia 2001

Land Cruiser, Sequoia & Tundra 4.7L V8

ETCS consists of throttle body, accelerator pedal position sensor, Throttle Position (TP) sensor, throttle control motor, magnetic clutch and Engine Control Module (ECM). ETCS uses the ECM to calculate throttle valve opening in the throttle body in relation to driving conditions. ETCS controls operation of idle speed control system, cruise control system, traction control system (if equipped) and vehicle skid control system (if equipped). Accelerator pedal position sensor is mounted on throttle body and is integrated with throttle lever which attaches to the throttle cable. See Fig. 5 . Accelerator pedal position sensor consists of 2 sensors which delivers input signals to the ECM. TP sensor delivers input signals to ECM to indicate throttle valve opening.

ECM uses these input signals to operate throttle control motor to obtain proper operating speeds in relation to accelerator pedal position and engine speed, obtain proper idle speed, and operate cruise control system, traction control system (if equipped) and vehicle skid control system (if equipped). Throttle control motor is mounted on side of throttle body and operates throttle valve on throttle body by use of a magnetic clutch.

In the event of an ETCS malfunction, Malfunction Indicator Light (MIL) will be illuminated and Diagnostic Trouble Code (DTC) will be stored in ECM. MIL is displayed as an engine icon on instrument cluster on instrument panel. See TESTING PROCEDURE under SELF-DIAGNOSTIC SYSTEM in appropriate SELF-DIAGNOSTICS article for retrieval of DTCs. If malfunction exists, magnetic clutch will be disengaged, allowing spring pressure to close the throttle valve. When magnetic clutch is disengaged, throttle control motor will not operate the throttle valve. If ETCS is shut off, accelerator pedal may be used to operate throttle valve for vehicle operation in limp mode by using limp mode lever on throttle body. See Fig. 5 .

2001 ENGINE PERFORMANCE Theory & Operation

2002 Tundra Throttle Body Diagram

Fig. 5: Locating Electronic Throttle Control System Components On Throttle Body (Land Cruiser, Sequoia & Tundra 4.7L V8)

Courtesy of TOYOTA MOTOR SALES, U.S.A., INC.

Fig. 5: Locating Electronic Throttle Control System Components On Throttle Body (Land Cruiser, Sequoia & Tundra 4.7L V8)

Courtesy of TOYOTA MOTOR SALES, U.S.A., INC.

2001 MR2 With Sequential Manual Transaxle & 4Runner

NOTE: On MR2 models, there are 2 types of manual transaxles used. The standard type manual transaxle in which the driver operates the clutch and shifts the transaxle, and the sequential manual transaxle, which is electronically controlled. The clutch is operated and transaxle is shifted hydraulically by moving the shift lever forward or backward. The sequential manual transaxle may be identified by the shift lever pattern and shift lever pattern consists of "R", "N", "S" and "+" in place of the conventional type shift lever pattern and there is no clutch pedal.

On all models, ETCS consists of throttle body, accelerator pedal position sensor, Throttle Position (TP) sensor, throttle control motor, magnetic clutch and Engine Control Module (ECM). ETCS uses the ECM to calculate throttle valve opening in the throttle body in relation to driving conditions. ETCS controls idle speed and cruise control system operation. Accelerator pedal position sensor is mounted on throttle body and is integrated with throttle lever, which attaches to the throttle cable. See Fig. 6 and Fig. 7 . Accelerator pedal position sensor consists of 2 sensors which deliver input signals to the ECM. TP sensor delivers input signals to ECM to indicate throttle valve opening.

ECM uses these input signals to operate throttle control motor to obtain proper operating speeds in relation to

2001 ENGINE PERFORMANCE Theory & Operation accelerator pedal position and engine speed, obtain proper idle speed, and provide cruise control operation. Throttle control motor is mounted on side of throttle body and operates throttle valve on throttle body by use of a magnetic clutch.

In the event of an ETCS malfunction, Malfunction Indicator Light (MIL) will be illuminated and Diagnostic Trouble Code (DTC) will be stored in ECM. MIL is displayed as an engine icon on instrument cluster on instrument panel. See TESTING PROCEDURE under SELF-DIAGNOSTIC SYSTEM in appropriate SELF-DIAGNOSTICS article for retrieval of DTCs. If malfunction exists, magnetic clutch will be disengaged, allowing spring pressure to close the throttle valve. When magnetic clutch is disengaged, throttle control motor will not operate the throttle valve. If ETCS is shut off, accelerator pedal may be used to operate throttle valve for vehicle operation.

Throttle Valve Control

Fig. 6: Locating Electronic Throttle Control System Components On Throttle Body (2001 MR2 With

Sequential Manual Transaxle)

Courtesy of TOYOTA MOTOR SALES, U.S.A., INC.

Fig. 6: Locating Electronic Throttle Control System Components On Throttle Body (2001 MR2 With

Sequential Manual Transaxle)

Courtesy of TOYOTA MOTOR SALES, U.S.A., INC.

2001 ENGINE PERFORMANCE Theory & Operation

Toyota Rav4 2001 Throttle Body
Fig. 7: Locating Electronic Throttle Control System Components On Throttle Body (4Runner) Courtesy of TOYOTA MOTOR SALES, U.S.A., INC.

Prius

ETCS consists of throttle body, accelerator pedal position sensor, Throttle Position (TP) sensor, throttle control motor, Hybrid Vehicle (HV) control Electronic Control Unit (ECU) and Engine Control Module (ECM). Hybrid vehicle control ECU is referred to as HV ECU. ETCS uses the ECM to calculate throttle valve opening in the throttle body in relation to driving conditions. ETCS controls idle speed and cruise control system operation. Accelerator pedal position sensor is mounted near accelerator pedal. See Fig. 8 . Accelerator pedal position sensor consists of 2 internal sensors which deliver accelerator pedal position signals to the HV ECU. HV ECU in turn delivers the input signals to ECM. TP sensor delivers input signals to ECM to indicate throttle valve opening.

ECM uses input signals to operate throttle control motor to obtain proper idle speed and provide cruise control operation. Throttle control motor is mounted on side of throttle body and operates throttle valve. See Fig. 8 .

In the event of an ETCS malfunction, MIL will be illuminated and a DTC will be stored in ECM. MIL is displayed as an engine icon on instrument cluster at center of instrument panel. See TESTING PROCEDURE under SELF-DIAGNOSTIC SYSTEM in appropriate SELF-DIAGNOSTICS article for retrieval of DTCs. If malfunction exists, voltage to throttle control motor is turned off in which throttle control motor becomes inoperative, allowing spring pressure to close the throttle valve.

2001 ENGINE PERFORMANCE Theory & Operation

Toyota Carina Throttle Body

Fig. 8: Locating Electronic Throttle Control System Components On Throttle Body & Accelerator Pedal Position Sensor (Prius)

Courtesy of TOYOTA MOTOR SALES, U.S.A., INC.

Fig. 8: Locating Electronic Throttle Control System Components On Throttle Body & Accelerator Pedal Position Sensor (Prius)

Courtesy of TOYOTA MOTOR SALES, U.S.A., INC.

Continue reading here: Computerized Engine Controls

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2005 Tacoma 4.0L Hesitation and No Throttle Response

SC T100 said:

If the codes are telling the dealer the TPS (or whatever it's called) is bad, why not just replace that and not the ECM? Just because they "cleaned" them doesn't mean that sensor isn't shot. At the most I would think replacing the throttle pedal assembly would be a better way to go first (if the TPS is integral and can't be replaced seperately). You may want to have another dealer give you a second opinion before dropping a ton of cash into a new ECM/ harness.

Click to expand...

I should clarify, The TPS code went away after the replaced the entire pedal assembly and thus why they didn't proceed with further troubleshooting of the TPS. Currently I only have P2127 which is the low voltage code for the Pedal Position Sensor. The removal and cleaning of the plugs was for the P2127 code to see if it was just a bad contact between the new pedal assembly and the ECM.

keezer37 said:

The position sensor does not look to be part of the pedal assy. I believe it is behind the instrument cluster and to the right. I would have gone for this were it not for your comment of there being a fault on the input side of Switch "E" and looking at the prints, it is just the sensor - wiring harness - ECM.
What throws me is that it happens when it is cold. I would usually be inclined to go after the sensor for this reason and simply because they tend to have a higher failure rate.
Were it the harness, you'd have a better chance of an intermittent fault. I would normally do a resistance check on the line for switch "E" within the harness but you're dealing with labor cost here.
The loss of power is probably the ECM going into a fail safe mode.

No good suggestions other than to move the harness if possible to see if the fault code goes away.

Click to expand...

Which position sensor are you referring to? I am trying to get all the sensors on this vehicle figured out for one. Are you commenting on the Throttle position sensor or the pedal position sensor? The way I understand it the P2127 is for the pedal position sensor which there are two of built within the pedal assembly for redundancy and if the signal from either does not match the system throws a fault.
What sensor are you referring to behind the dash? I don't want to rule anything out just yet. I'm reading the schematics the same way...which is probably why the dealership believes it can only be either the wiring harness or ECM...because those are the only two other components in the system. I'm still not sold on this as I am a skeptic and do not fully trust automobile diagnostics and their computers...especially when it comes to electrical gremlins...I've seen some strange things happen.
As far as I can tell the issue is intermittent and cold related. If I run the vehicle and cycle it a few times it runs normal and reads normal parameters.
Being a digital signal from the sensor I would assume the dealership can test for good signal strength. I have played around with the harness, plugging and unplugging it from either end with no change in results.
I appreciate the input and keep bouncing ideas my way...this brainstorming might lead me to some light bulb theory. Thanks

 

Sours: https://expeditionportal.com/forum/threads/2005-tacoma-4-0l-hesitation-and-no-throttle-response.51570/
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Pedal Commander Toyota Tundra Throttle Response Controller # PC27. This product fits 2007, 2008, 2009, 2010, 2011, 2012, 2013, 2014, 2015 and 2018 Toyota Tundra trucks equipped with the 4.7L V8 and 5.7L Gasoline engines. If you own a 2007-2018 Toyota Tundra this part number # PC27 is the correct one for your vehicle!

How does this product work?
The Pedal Commander # PC27 is a plug and play device that intercepts the electronic signal that your accelerator pedal sends to the Engine Control Unit (ECU). It then alters the signal to allow for more rapid engine acceleration which in turns provides you with better vehicle acceleration. Newer Toyota trucks utilize a"fly by wire" throttle that doesn't have a direct mechanical connection to the throttle body like older vehicles. To make acceleration smoother the factory engineers will program the computer system to provide a very lazy acceleration profile. While this does provide a level of comfort it can cause your Tundra to feel slow and sluggish. If you want to wake up your truck without actually installing potentially warranty voiding power adders the Pedal Commander is your best option. Your engine still makes the same amount of horsepower and torque as before but you get the feeling that ALL of that power is available right NOW instead of waiting for the factory ECU to slowly deliver it over time. This results in a MUCH more enjoyable vehicle to drive... and it won't void your warranty!

How easy is installation?
In a word, easy! Each Pedal Commander PC-27 is custom built for use with specific vehicles. Vehicle specific wiring harness and programming is included. Installation takes about 10 minutes and usually requires no tools. A flashlight and a good set of glasses may be helpful if your eyes aren't as great as they used to be. The basic installation goes something like this... turn the ignition off and remove the key and let the vehicle sit for a minimum of 5 minutes. This allows the computer systems and accessories to power down completely. If your vehicle is equipped with a keyless entry remote make sure that it is located well outside of its operating range. These remote keys can cause the factory computer systems to activate even though the ignition is in the off position. Failure to follow these basic steps can cause problems after the Pedal Commander is installed. The next step is to disconnect the factory wiring plug at the accelerator. You then connect the factory wiring to the Pedal Commander and connect the wiring harness coming out of the Pedal Commander directly to the accelerator. That's it, the device is now installed!

Frequently Asked Questions...

Does Pedal Commander # PC27 harm my engine?
The Pedal Commander does not increase the engine horsepower or torque of your engine. The power output is not altered. This device works by removing the factory "lag" that is programmed into the accelerator and ECU. This product does NOT modify the fuel or timing values. All factory protection features of the engine remain in place. Pedal Commander will only be activated when you really need the power (like when you accelerate) and Pedal Commander will not function when the accelerator is not depressed, such as when idling in traffic or at a stop light.

Can Pedal Commander # PC27  be used on new or high mileage vehicles?
You can use Pedal Commander regardless of the mileage of your vehicle. Due to the digital protection technology of your original ECU. ou take no risk. Dealerships and fleet managers are installing these units in brand new vehicles. You should always observe the run-in period as recommended by the manufacturer. Customers have installed Pedal Commander on vehicles with well over 100,000 miles without issues. If your vehicle is mechanically sound and in good operating condition the Pedal Commander will simply enhance the driving experience of your order vehicle.

Can Pedal Commander # PC27 be detected when the vehicle is taken in for service?
No, Pedal Commander cannot be detected. After the removal of Pedal Commander it is not detectable and the vehicle is immediately returned to its original performance and calibration. No permanent hardware or software changes are ever made when using Pedal Commander. This makes Pedal Commander ideal for leased or company vehicles. The operation is not traceable as it does not leave a digital foot print after it is removed from the vehicle.

Is the Pedal Commander # PC27 compatible with aftermarket tuners or reflashed ECU's?
Yes! The Pedal Commander is compatible with aftermarket tuners and programmers. The Pedal Commander only modifies the throttle pedal signal which means it is virtually invisible to your tuner. If you are running a modified ECU the Pedal Commander will still provide 100% functionality.

What is the warranty on the Pedal Commander # PC27?
Pedal Commander will replace any faulty or defective unit within 2 years of the original purchase date! Each unit also qualifies for any available software updates that may be released during the first 2 years of ownership.

For more information on this or any other Pedal Commander product please click on the "Ask A Question" link located at they very top of this page.

This item ships for FREE to any address in the United States of America!

Sours: https://performancelifts.com/pedal-commander-toyota-tundra-throttle-response-controller-pc27-bluetooth.html
Throttle control motor part 1

Throttle Response Controller for Toyota Tundra 2003-2006 Pedal Commander

Description

Throttle Response Controller for Toyota Tundra 2003-2006 Pedal Commander

Part Number: PC38-BT

Important Fitment Notes: Fits the following Engine(s) Only! 4.7L; 4.0L; 3.4L

Pedal Commander is the world’s most advanced throttle controller. It eliminates the response delays from your electronic accelerator pedal, allowing your engine to respond faster and resulting in much faster acceleration.

Have you ever noticed that older cars were more responsive and quicker to take off? That’s because older cars were all mechanical, which means everything happened instantaneous. Nowadays, cars have ECUs (Electronic Control Units) which require signals to be sent to the computers in your car, resulting in response delays.

The Pedal Commander solves the problem and gets rid of that delay!

The Pedal Commander has 4 different control modes: Eco, City, Sport, and Sport+. Each control mode has an additional 8 modes to further adjust the sensitivity to your liking. These 36 different parameters is what makes us the best throttle response controller on the market. Our unit is also programmable according to your desire of your cars specifications and is now bluetooth compatible for easy usage using your smart phone.

8 REASONS WHY YOU NEED A PEDAL COMMANDER:
1. It eliminates the delay from your electronic accelerator pedal, resulting in much faster acceleration.
2. You can save up to 20% in fuel economy using Eco Mode.
3. It comes with 36 sensitivity settings so you can fine-tune to your personal preference.
4. It does not void any warranty or leave any traces on your ECU.
5. It’s an easy plug-and-play installation that takes only a couple of minutes.
6. It is now Bluetooth enabled so that you can control the unit from your phone using the Pedal Commander App.
7. We offer a 30-day money-back guarantee in case you are not happy. (You will be)
8. It comes with a 2-year product warranty in case anything goes wrong.

  • Will NOT Void Your Vehicles Warranty
  • Bluetooth Equipped No Extra Charge
  • 2-Year Product Warranty With Tech Support
  • Easy Plug-and-Play Installation
Sours: https://www.bilsteinlifts.com/shop/uncategorized/throttle-response-controller-for-toyota-tundra-2003-2006-pedal-commander/

Tundra no throttle response toyota

Accelerator Pedal Sensor Problems of Toyota Tundra

1 Accelerator Pedal Sensor problem of the 2000 Toyota Tundra

Failure Date: 11/16/2017

Driving at 50 mph, engine losses power like fuel is cut off. Check engine light comes on, throttle pedal has no response until 3/4 down . Very dangerous as I was in traffic and could not drive the truck. I was told it is a problem with the accelerator pedal position sensor. Cleared code & happened again 2 days later, this time as I was coming to a stop. Vehicle stalled & would not restart - same code - p1121.

See all problems of the 2000 Toyota Tundra 🔎.

2 Accelerator Pedal Sensor problem of the 2000 Toyota Tundra

Failure Date: 08/01/2010

1. Driving at highway speeds down a freeway (around 60-70 mph) 2. The vehicle suddenly loses all power and just idles, at this point speed reduces by itself down to about 5-10 mph. Pressing the gas pedal does nothing. At this point, I am forced to the shoulder as to avoid other vehicles. 3. Alleviated the problem by changing the accelerator pedal position sensor. This problem should be addressed by Toyota as a possible safety issue.

3 Accelerator Pedal Sensor problem of the 2002 Toyota Tundra

Failure Date: 05/03/2010

Today I was cruising along at 50mph and my truck (2002 Toyota Tundra v8) felt as if the fuel cut out. I let off the throttle and got back into it and the response was very slow. Then there was no response at all as I coasted to a stop. The truck idled, but no response to the accelerator. This problem has occurred twice in the last week. Toyota troubleshooting code says it is a faulty accelerator pedal position sensor. They want $500 to fix.

See all problems of the 2002 Toyota Tundra 🔎.

4 Accelerator Pedal Sensor problem of the 2000 Toyota Tundra

Failure Date: 01/06/2010

I have a 2000 Toyota Tundra and today, the engine stalled at the first light I stopped at. When I restarted the engine, the truck would not accelerate. It would idle, but there was no response to the gas pedal. Since I was on an incline, I could not go forward so I had to reverse slowly back to a parking lot. When we hooked up the obdii code puller, it came back with a p1121 code. I researched on the internet what this was and found out it has to do with an accelerator pedal position sensor (apps). When I restarted the engine after pulling the code, it appears to be working fine. I do not have a warm and fuzzy feeling about driving the vehicle now. I am glad this occurred at a relatively quiet intersection and not on a busy road or highway or in the middle of nowhere. It seems like this is a pretty common problem on these vehicles and seems to be a potentially dangerous condition you can get yourself into. I am hoping there is a good reason for the sensor in the first place.

5 Accelerator Pedal Sensor problem of the 2007 Toyota Tundra

Failure Date: 07/12/2008

While driving at approx. 55mph the accelerator pedal on my 2007 Toyota Tundra suddenly dropped to the floor below my right foot. My truck accelerated to full throttle. The cruise control was not on. The accelerator was not stuck to the floor mat. The truck accelerated at a rapid pace and nearly ran into the rear of the vehicle in front of me on the roadway. I attempted to stop the vehicle by tapping on the brakes, then the accelerator and turning the cruise control button off even though the cruise was already off. Nothing responded and the truck continued to accelerate to a dangerous speed. The accelerator was "floored" and would not move. I had to maneuver around the vehicle in front of me and several that passed going the opposite direction quickly. The truck was gaining speed at an incredibly rapid pace. I continued to brake the truck in an attempt to stop the vehicle and prevent loosing control. I then attempted to down-shift the transmission. This caused the engine to rev uncontrollably. The same happened when shifted into neutral in an attempt to turn the engine off with the key. The rpm's were revving so high that I feared the engine would blow up. I pulled my truck into a boat parking area on the roadside and slammed on the brakes while putting the truck into neutral and turning the engine key to off. The engine, brakes and transmission were all smoking from the stress and high rpm's. I had experienced a similar uncontrollable acceleration about six months prior (Jan. 2008) to this one but was able to recover quickly by hitting the brakes and presumed that it was something wrong with the cruise control. Toyota replaced the accelerator pedal sensor assy but would not say whether this was the cause of the uncontrollable acceleration. They said that it was possibly caused by the aftermarket floor mats that I purchased at the dealership. Unfortunately, the pedal dropped from under my foot without my intervention. Toyota has not responded to my calls.

See all problems of the 2007 Toyota Tundra 🔎.

6 Accelerator Pedal Sensor problem of the 2001 Toyota Tundra

Failure Date: 04/02/2006

Faulty apps (accelerator pedal position sensor). Vehicle is designed with a combination of mechanical and drive by wire throttle body. When driving at freeway speeds with steady accelerator pressure, the truck felt as if the fuel cuts off and instantly started to coast. No input from gas pedal when depressed. Truck just idles. This can be extremely dangerous in traffic as there is no input from the accelerator.

See all problems of the 2001 Toyota Tundra 🔎.


Other Common Vehicle Speed Control related problems of Toyota Tundra

Sours: https://www.carproblemzoo.com/toyota/tundra/accelerator-pedal-sensor-problems.php
How to improve your Toyota Tundra's throttle response

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