PAT


suppliers


aaaa logo

Member of Australian Automotive Aftermarket Association

PRTC Council Member

4WD Council Member



Latest News

Electronic Throttle Bodies (TBO)

The Throttle Body on an internal combustion engine controls the amount of air that enters the engine and as a result controls the engine speed. This was traditionally achieved by connecting a cable from the accelerator pedal directly to the throttle body.

As engine management systems have evolved over the years the cable throttle body has been replaced by the electronic throttle body. Commonly known as drive by wire it is now fitted by to the majority of vehicles on the road today. Electronic Throttle Control Systems rely on three main components

  • 1. Accelerator Pedal Position Sensor
  • 2. Power train Control Module (PCM or ECM)
  • 3. Electronic Throttle body

electronic throttle control system inputs and outputs | Electronic circuit  projects, Electrical circuit diagram, Electronics
Image source: www.pinterest.com.au/pin/32369691060770117/

Some systems also incorporate an Electronic Throttle Control Module.

Electronic Throttle Control System (ETCS)


Image source: contest.techbriefs.com/2014/entries/machinery-automation-robotics/4932

The “drive by wire system” has been used by vehicle manufacturers since 1988 when BMW introduced it on the 7 series. There are variations in how different electronic throttle bodies operate depending on brand and application. It is important to refer to the appropriate workshop information for the specific vehicle you are working on. The actuator (electric motor) is operated by controlling the current flow thru the motor using pulse width modulation. The voltage applied to the DC electric motor is in the form of a square wave. The DC electric motor responds to the change in duty cycle controlled by the ECU. This signal is best measured using an oscilloscope and is usually expressed as a percentage. Eg. 50% duty cycle.

Although the Electronic Throttle Body fitted to a diesel engine looks similar to that fitted to a petrol engine the way they operate is very different.

Common Link less Type Electronic Throttle Body
This commonly used throttle body integrates the drive motor which moves the throttle valve and two TPS units are used for ECU feedback.

Advantages include

  • No need for cruise control actuators or modules
  • No need for a separate idle control system
  • Improved drivability by controlling torque transfer when required
  • Improved traction and stability control

Diesel EDR-Di Electromotive regulating throttle type system
Mainly used on Diesel engines.

  • Control of EGR gasses in the engine by continuous adjustment of the throttle valve
  • Avoiding shut down shakes when the engine is switched off by restricting the air flow to the engine
  • The throttle valve is generally in the fully open position at rest
  • A vacuum pump is required for vacuum controlled/operated components
  • The throttle valve is generally not used for RPM and torque control
  • May have single or double throttle position sensors integrated in these units

Contact type Throttle Position Sensors
Generally, dual potentiometer type unit. Each potentiometer produces opposite varying output voltages.

VE Commodore TBO-051


Contactless Type Throttle Position Sensors
Hall sensors for TPS output signals are utilised in some Electronic Throttle Bodies for motor cycles, light motor vehicles, heavy motor vehicles and plant and equipment. Using Hall sensors for the TPS signal reduces the effect of vibration, contamination and physical wear damage providing a constant TPS signal to the ECU. The output signal can be an analogue varying voltage signal or a digital square wave signal.

Failsafe
The system may go into failsafe mode due to a fault in the throttle circuit. This could be as a result of a fault in the pedal position sensor, associated wiring, ECU or the electronic throttle body itself.

Mechanical Failsafe
When the Electronic Throttle body harness is disconnected or the ECU power supply is interrupted the throttle valve is held open slightly in a failsafe position which allows the vehicle to be driven slowly to a workshop for repair.

Electrical Failsafe
The amount of failsafe drivability will vary depending on the manufacturer. One or more TPS or Pedal Position Sensor failures will change the vehicles drivability to ensure the safety of the passengers.
A vehicle in failsafe mode will set fault codes and illuminate the engine check light.

Testing
When testing the throttle body circuit it is important to follow the manufacturer process and specifications. If the throttle body is cleaned, removed or replaced it may be necessary to go thru a resetting procedure. If the procedure is not done according to the manufacturer instructions either manually or using a suitable scan tool poor idle control may result, including high idle, stalling etc.
Most throttle bodies can be bench tested using the EQP-115 Electronic EGR/Throttle Body and Actuator Tester.

Premier Auto Trade’s Emissions range includes more than 150 Throttle Bodies (TBO), covering more than 6.5 million vehicles on the road in Australia and New Zealand.

Here at PAT we’re constantly working with OE suppliers and vehicle manufacturers to ensure we stay up to date with the latest technologies. This constant research and development allows PAT to have the parts and technical knowledge available to our clients as transportation evolves.



Latest News

Exhaust Gas Temperature Sensor (EGT)

Hose Clamps

MAP Sensors (Manifold Absolute Pressure)

Electric Water Pumps

Pulse Width Modulation (PWM)

Mass Air Flow Sensors (Hot Wire/Film)

Petrol Fuel Injector Replacement

Electronic Throttle Bodies (TBO)

Dual Petrol Injection Systems – Technical Tip

Wheel Speed Sensors – More than just ABS

PAT Expands Emission Sensor Range

PAT Racing & Performance Injector Range Upgrade

Coils ain’t Coils!

ICON SERIES Range Grows

Oil Level and Oil Temperature Sensors Operation

Failed Air Temperature Sensors Symptoms

MAP Sensors Testing

TI Automotive Mustang Performance Pump

New ICON SERIES Hose Clamp Range

New Premium Sensors Ranges

Relay problems on vehicle

Test Equipment and Tools

Fuel Rail Sensors (FRS)

Failing Secondary Ignition

Testing Electric Fuel Pumps

Performance Fuel Rails and Filters

Testing CAM Angle Sensors (CAM)

Testing Electric Valve Solenoids (EVS)

Electronic Throttle Bodies

Performance Fuel Cells & Surge Tanks

Fault Finding Fuel Pressure Regulators (FPR)

Testing Variable Camshaft Actuators (VCA)

Testing Accelerator Pedal Position Sensors (APS)

Diagnosing Crank Angle Sensors (CAS)

Performance Regulators and Gauges

Differentiating Wheel Speed Sensors (WSS)

Mass Air Flow Sensors - Hot Film

Mechanical Fuel Pumps (MFP)

ICON Series Hoses

Particulate Matter Sensors (PMS)

Performance Fuel Injectors

Fuel Injectors (GDI)

DENSO Spark Plugs

Performance Fuel Pumps

Cooling Fan Switches (CFS)

Water Temperature Sensors (WTS)

Reverse Light Switches

Oil Temperature Sensors (OTS)

BMC Air Filters

Flasher Cans

Exhaust Pressure Sensors (EPS)

Power Steering Switches

Coolant Temperature Sensors (CTS)

Variable Intake Manifolds (VIM) and Intake Control Valves (ICV)

Oil Level Sensors (OLS)

Throttle Position Sensors (TPS)

Air Temperature Sensors (ATS)

Ignition – Condensers, Contact Sets, Distributor Caps and Rotors

Fuel System Accessories (FSA)

MAP Sensors (MAP)

Relays (REL)

HALL Sensors and Pickups (HAL)

Fuel Rail Sensors (FRS)

Speed Sensors (SPS)

New ICON Series Fuel Pump Range

New ICON Series Hose Range

Performance Range Increase Continues

PAT Oxygen Sensor Range Expands

PAT Expands Automotive Aftermarket Presence

Equipment and Tools

Electric Fuel Pumps (EFP)

Electric Valve Solenoids (EVS)

CAM Angle Sensors (CAM)

Ignition Modules (MOD)

Injector Service Components

Exhaust Gas Temperature Sensors (EGT)

Throttle Bodies

Knock Sensors

Ignition Coils

Fuel Injectors (Petrol)

Variable Camshaft Actuators (VCA) Oil control Valves

Accelerator Pedal Position Sensors (APPS)

Exhaust Gas Recirculation Valves (EGR)

Relocation of Sydney Distribution Centre

Wheel Speed Sensors (WSS)

High Tension - Ignition Lead Sets (ILS)

Suction Control Valves (SCV)

Mass Air Flow (MAF) Sensors

Crank Angle Sensors (CAS)

Fuel Pressure Regulators (FPR)

Oil Pressure Sensors

Exhaust Gas Oxygen Sensors

Shedding Light on Stop Light Switches

Ignition Distributors

Common Rail Diesel (CRD) Fuel Injectors

Idle Speed Control

New Distribution Centre Opening in ADELAIDE

New Distribution Centres Opening in PERTH and DARWIN

New Fuel Catalogue from Premier Auto Trade

BMC 4WD Air Filters Range Expands

New MVP Fuel Injector Range

PAT Developing Programs on Demand

New Premium Packaging for PAT

New Product Ranges Released By PAT

PlusQuip Test Equipment Range Expands

New Raceworks Catalogue

New Exhaust Gas Temperature Sensors

New Trade Catalogues from Premier Auto Trade

New Distribution Centre Opening in Adelaide

More European Parts from Premier Auto Trade

New PlusQuip Fuse Current Tester

PAT Pumped up!

Coils ain't Coils!

New PlusQuip Electronic EGR, Throttle Body, and Actuator Tester

New breed of High Performance products!

New Ignition Coil and Lead Set Kits

Wheel Speed Sensor Program Launched

Premier Ignition Lead Program Launch

Ignition Coils - Coils ain't Coils!

PlusQuip Battery Testers Launch

Premier Auto Trade Supporting Local Racing

Oval Trumpet Airbox (OTA) for 4WD applications from BMC Air Filters

BMC Air Filters NOW AVAILABLE from Premier Auto Trade

Premier Ignition Coils

MAP-013 and KNS-021 Now Back in Stock

BMC Air Filter partners with Premier Auto Trade

Premier Auto Trade opens South Australian Distribution Centre

Direct Fit Oxygen Sensor Range Hits 700

Automotive Electro-Mechanical Relays Types / Faults / Diagnosis

PlusQuip Tools and Equipment Launch

PlusQuip Fuel Line Repair Kit

PlusQuip Fuel Injector Service Kit

E85 High Performance with Premier Auto Trade

Testing EGR Systems (Pt 2)

New Delphi Fuel Module and Ignition Coil Range

Fuel Injector Service Components from Premier Auto Trade

Older News...

   privacy statement   terms of use   terms and conditions   sitemap   news  

© PremierAutoTrade