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Check electronic throttle control came on the drivers info display. vehicle will not start

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Check wiring harness on throttle pedal. and see if thee is a fuse or relay.

Posted on Apr 25, 2010

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Cruise control quit working on my 2004 F150 4x4 lariat what could be problem

Could be a number of thing's wrong .Without hooking a factory scan tool and checking for DTC'S diagnostic trouble codes , viewing scan data i would only be guessing . Your vehicle speed control is computer controlled . switches are low voltage input to the PCM - engine computer , Vehicle also has electronic throttle control . Electronically controlled DC motor on the throttle plate is how the computer controls the gas going into the engine. Gas pedal has position sensors that tell the computer how much your pushing on the gas , sensors on the throttle body tell the PCM if it is opening the throttle enough . VERY COMPLEX !
YOUR best bet , take it to a qualified repair shop .
Accelerate your Throttle by Wire Repairs Ford Electronic Throttle Control

Aug 30, 2017 | Cars & Trucks

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I have a 2009 Saturn Aura XE and I want to know where exactly the speed sensors are so I know exactly what they look like so I can order the right parts and then replace them myself.

Your best bet would be to take your vehicle to a qualified repair shop that knows how to test an not guess as to the problem . Having control modules checked for DTC's - diagonstic trouble codes should always be the first step diagnosing modern automobiles . Replacing parts is not the way to try an fix your car. Would hate for you to replace a part an not have it fix the vehicle . Engine power reduced is associated with the electronic throttle control , no speed sensor .
Throttle Actuator Control (TAC) System Description for 3.6L engine or Throttle Actuator Control (TAC) System Description for the 2.4L engine

The engine control module (ECM) is the control center for the throttle actuator control (TAC) system. The ECM determines the driver's intent based on input form the accelerator pedal position sensors, then calculates the appropriate throttle response based on the throttle position sensors. The ECM achieves throttle positioning by providing a pulse width modulated voltage to the throttle actuator motor. The throttle blade is spring loaded in both directions, and the default position is slightly open.
002 Electronic Throttle Operation
Drive by Wire Function and diagnostics by Wells
Reduced power mode will cause traction control system to be shut off turning on the light . Nothing wrong with traction control.
So do yourself a favor an take it to a GM dealer or someother qualified repair shop .

Aug 28, 2017 | Saturn Cars & Trucks

2 Answers

I just got my alternator fixed then i started having the ESC serv ice light come on, and the trac symbol comes up and the engine light flashes. and the power is reduced and it jerks when driving

its possible that the incorrect voltage regulator was fitted to the alternator during the repair. A low voltage or irregular voltage from the alternator can cause havoc with vehicle electronics

Aug 02, 2016 | 2009 Chevrolet Malibu

1 Answer

Stalls intermittently, wrench icon lights up under tach.

Problem with the electronic throttle control .
It should be noted that the ETC system includes a wrench light on the instrument cluster that illuminates when a fault is detected. Faults are also accompanied by DTCS and the "Check Engine Soon" light. Your best bet is to take your vehicle to a reputable ASE certified repair shop .
Overview The Generation II (Gen II) Torque Based Electronic Throttle Control (ETC) is a hardware and software strategy that delivers a transmission output shaft torque (via throttle angle) based on driver demand (pedal position). It utilizes an electronic throttle body, the PCM and a accelerator pedal assembly to control throttle opening and engine torque. The ETC system basically replaces the standard cable operated accelerator pedal, idle air control (IAC) motor, 3-wire throttle position sensor (TPS) and mechanical throttle body .

Mar 29, 2016 | 2004 Ford Explorer XLT

1 Answer

2007 Ford five hundred cruise control turns off when you hit a bump

First off the cruise control is computer controlled , need to check for diagnostic trouble code's . Your vehicle has electronic throttle control also . If your don't have a factory or professional grade scan tool your odds of being able to fix this yourself is close to zero ! You could find a wiring diagram an do some voltage drop testing ,mite find lose connection .
Speed Control
The speed control system consists of the following components:
  • Speed control switches
  • Speed control deactivator switch
  • Speed control indicator
  • Powertrain control module (PCM)
  • Electronically controlled throttle body
  • Clockspring
The speed control system is controlled by the PCM. The speed control system is designed to maintain a selected vehicle speed between 48 and 200 km/h (30 and 124 mph). The speed control system is controlled by the steering wheel mounted switches (ON, OFF, SET+, SET-, CANCEL, and RESUME), and the brake pedal. The steering wheel mounted switches are hardwired to the PCM.
The speed control functions include:
  • Turning the speed control system on.
  • Setting and maintaining the desired vehicle speed.
  • Accelerating the vehicle speed.
  • Decelerating the vehicle speed.
  • Resuming the prior vehicle speed.
  • Turning the vehicle speed control system off.
  • Canceling the speed control.
The clockspring provides the electrical interface between the steering column wiring and the speed control switches in the steering wheel.
The inputs to the PCM are:
  • Output shaft speed (OSS) sensor
  • Speed control switches
  • Stoplamp switch
  • Speed control deactivator switch
  • SJB messages
The outputs of the PCM for the speed control system are:
  • Speed control indicator lamp
  • Throttle command
The throttle position is completely controlled by the PCM through the electronically controlled throttle body. Speed control electronics are contained entirely within the PCM.
When the speed control system is active, the PCM corrects for deviations in the actual vehicle speed by proportionally moving the throttle plate. The PCM modulates the throttle to minimize error between actual vehicle speed and the desired speed.
The PCM strategy uses the throttle control for smooth accelerations.
The PCM sends a serial message over the controller area network (CAN) to the instrument cluster whenever the speed control telltale should be turned on or off.
In the event of an OFF command or a deactivation request from the deactivator switch, the speed control system carries out a hard deactivation and immediately returns the throttle to the idle position.
In the event of a CANCEL command input, the system deactivates and the throttle returns to the idle position at a smooth and controlled rate.
The speed control system provides self-diagnostics. The speed control system is disabled anytime an error is detected in the system. No cluster telltale or message center messages are displayed when faults occur. Fault codes are logged by the PCM.
An electronic throttle control (ETC) system fault also causes the speed control system to be disabled. In this case, an ETC system warning indicator or message center message is displayed.
Additionally, the following conditions cause the speed control system to deactivate:
  • Transmission gear selector is put into a position other than D or OD.
  • Parking brake is applied.
  • Speed control set speed is over-ridden with the accelerator pedal for a period longer than 5 minutes.
  • Vehicle speed loss from set speed of greater than 16 km/h (10 mph) occurs.
  • Vehicle speed falls below the minimum allowable limit of 48 km/h (30 mph).
  • Speed control switch is pressed or stuck longer than 2 minutes.
  • Powertrain Control Module (PCM) Diagnostic Trouble Code (DTC) Index DTC Description Action P0579 Cruise Control Multifunction Input A Circuit Range/Performance Go To Pinpoint Test C . P0581 Cruise Control Multifunction Circuit High Go To Pinpoint Test C . P0720 Output Speed Sensor Circuit REFER to the Powertrain Control/Emissions Diagnosis (PC/ED) manual. P0721 Output Speed Sensor Circuit Range/Performance REFER to the Powertrain Control/Emissions Diagnosis (PC/ED) manual. P1500 Vehicle Speed Error REFER to Section 307-01A or Section 307-01B . P1501 Vehicle Speed Error REFER to Section 307-01A or Section 307-01B . P1703 Brake On/Off Failure Go To Pinpoint Test B .

    Transmission Control Module (TCM) Diagnostic Trouble Code (DTC) Index DTC Description Action P0720 Output Speed Sensor Circuit REFER to Section 307-01A . P0721 Output Speed Sensor Circuit Range/Performance REFER to Section 307-01A .

Mar 04, 2016 | 2007 Ford Five Hundred Limited Sedan

1 Answer

Reduce power light on has no throttle and keeps giving throttle accuator cdes

2003 Silverado 2500HD REDUCED ENGINE POWER - Discussion on Topix > Top Stories
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Reduced Engine Power Message Displayed on GM Vehicles
Dec 10, 2012 - Tech Tip: Reduced Engine Power Message Displayed on GM Vehicles ... Model year 2008-'10 vehicles must have the engine control module (ECM) reprogrammed ... Do not drop the electronic throttle control components.

Oct 28, 2015 | Cars & Trucks

2 Answers

While starting vehicle ETC warning display vehicle not throttle

This is a warning that something needs to be checked. This happens a lot when a vehicle is jumped with a dead battery. You may have to take to dealer and have ETC reprogramed.
Throttle Control Warning Light More and more vehicles are doing away with the mechanical throttle cable between the driver's foot and the engine throttle body, replacing it with a "drive-by-wire" system. In this system, a throttle pedal sensor sends data to an electronic throttle control computer, which evaluates and relays the throttle request to a specialized electronic throttle motor on the engine throttle body.
The throttle motor opens or closes the actual throttle blade, which increases or decreases the power output of the engine. The throttle control warning light illuminates when a problem is detected in the electronic throttle system.

Jan 04, 2015 | Cars & Trucks

1 Answer

Location idle air control valve

Your vehicle does not have a IAC valve ! Your vehicle has electronic throttle control . P0351 probably a wiring issue or open driver inside the PCM for cylinder # one . Your best bet take it to the dealer , you have not the knowledge or tools to diagnose this problem ! You are obviously using some cheap code reader to pull codes with or you wouldn't come up with P0508 . Factory service info. does not show Po508 for that vehicle. Plus working for ford i know for a fact this vehicle does not have IAC . If the driver inside the PCM is bad it will need to go to dealer anyway for programming .

Jun 25, 2017 | Cars & Trucks

1 Answer


The "EML" warning light in a BMW indicates a problem with the "drive by wire" throttle control system."

"EML" is an acronym for "Elektronische Motorleistungsregelung". Loosely translated from the original German for the BMW owner means Electrionic Engine Power Control.

"EML" is BMW's system name for electronic throttle management. The "EML" system, in it's most basic sense consists of an accelerator pedal (with an electronic position sensor), a computer module (usu. integrated with the main engine computer), and an EDK (Elektronische Drosselklappe or Electronic throttle valve). The EDK is also known as a "drive by wire" throttle. "EDK" throttles use a computer controlled stepper motor rather than a purely mechanical linkage (usu. metal cable attached directly to the accelerator pedal) to control the opening and closing of the throttle plate.

"Drive by wire" throttles are very common on modern vehicles starting in the late nineties up through the present day. "Drive by wire" technology enables very precise throttle control to improve drivability and vehicle emissions, as well as many convenience features like electronic cruise control, traction control & stability control.

BMW first implemented "drive by wire" in very limited quantities on the most expensive & sophistocated BMW models starting in 1988.

The latest generation of advanced vehicle features to take advandage of "drive by wire" technology are radar guided cruise control, accident avoidance control, autonomous-driving, and autonomous-parking systems.

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Jun 09, 2011 | 2003 BMW 325

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I have a 2010 colbalt with 50k on it and all of a sudden it is giving me problems starting and will stall occasionaly when comming to a stop, the other day it even said my trunk was open so i got out and...

The trunk ajar switch is probably bad ,this is a signal to the BCM - body control module . The control module sends a message to DIC - driver info. center telling it to display this massage. Stalling problem could be as simple as a dirty throttle plate . Your vehicle has electronic throttle control ,computer controlled ! What kind of starting problems ? Long crank time ,no crank etc... Should explain these a little . No crank -when you turn the key nothing happens . Long crank time - you turn the key to start an the engine spins & spins for a long time before the engine starts .

Jul 19, 2017 | 2010 Chevrolet Cobalt

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