On a petrol injected engine with a suspect fuel related problem, it is important to correctly determine if the fuel supply and fuel pressure is adequate for correct engine operation. “Guessing is not an option”.
With so many areas of the fuel...
What a technician needs to know about the various effects on the engine management system and how to correctly carry out a diagnosis and identify the results when the FPR becomes faulty.
Note: Refer to previous article for Fuel Pressure...
What the technicians need to know when diagnosing Electronic Throttle Body faults whilst the vehicle is in a “Reduced Engine Power” mode.
Many a throttle body has been unnecessarily renewed due to not correctly carrying out basic power supply and...
What Technicians need to know about on car testing of CAM angle position sensors and related circuitry.
Faulty CAM position sensors may affect various engine operating systems in many ways. In many cases, a no start condition may result from a...
Manufactures will have the same terminal identification with a very different function .
Always Confirm with Manufactures Specifications.
A: Battery Sense
AC: Neutral or Star
AS: Voltage sense, external
Air Conditioning Diagnosis
by Temperature Measurement
Efficient operation of a vehicle’s A/C System is dependent on the change of state of the refrigerant within the
System by the pressure changes created by the compressor pumping the...
The Importance of SAE Classification for Beacons and your
Selection or Choice of Beacon for Your Application
The society for automotive engineers (SAE) has established a standardized classification system for vehicle warning lights.
Mechanical Fuel Pumps (MFP)
What technicians need to know about mechanical carburettor fuel pumps to ensure fuel flow and system pressure is suitable to ensure the correct fuel levels are maintained in an operational carburettor.
There are of...
Mass Air Flow Sensors - Hot Film
What technicians need to know about the design changes in the current Hot Film type MAF sensors to assist them in the servicing, on vehicle diagnosis and testing, to ensure correct Air/Fuel mixtures are maintained...
Wheel Speed Sensors (WSS)
What Technicians need to know about the operation of the active wheel speed sensors (WSS) and the operational circuitry to assist in the related diagnosis and testing process on the vehicle.
Even though the...
Variable Camshaft Actuators (VCA) Oil control Valves
What a Technician needs to know when working on or diagnosing faults on a Variable Valve Timing (VVT) system.
Brief description of VVT system.
The variable valve timing system is now...
Exhaust Gas Temperature Sensors (EGT)
What Technicians need to know before working on a vehicle fitted with EGT sensors.
Purpose and identifying the correct sensor by the location on the exhaust.
Sensor types and operations
Variable Intake Manifolds (VIM) and Intake Control Valves (ICV)
What technicians need to know about Variable Intake Manifolds and Intake Control Valves on today’s vehicles.
Variable Intake Manifolds
These systems utilize an ECU controlled...
Exhaust Pressure Sensors (EPS)
What technicians need to know about Exhaust Pressure Sensor types, operation and diagnosing/testing when working on the vehicle emission control system.
Purpose of the EPS
This sensor is a pressure...
Fuel Injectors (GDI)
What does the Technician need to know about Direct Fuel Injection (GDI) fitted to a motor vehicle?
Gasoline Direct Injection (GDI) systems are commonplace in the modern automotive industry. Just like Electronic Fuel...
Particulate Matter Sensors (PMS)
What technicians need to know about the increased use of Particulate Matter Sensors (PMS) now utilized on increasing numbers of Diesel-powered vehicles.
Currently, for Diesel-powered vehicles to meet Emission...