Technical Information | JAS Oceania | Auto Electrical Products

Technical Information

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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...

Fuel Pressure Regulators Fault Finding (FPR)

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...

Electronic Throttle Bodies

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...

CAM Angle Sensors testing (CAM)

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...

Alternator Terminal Identification

Note 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 B+:...

Air Con Diagnosis by Temp Readings

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...

Lighting - Beacon Class SAE

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. There is...

Mechanical Fuel Pumps (MFP)

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...

Air Flow Sensors - Hot Film

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)

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)

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)

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 Effects on...

Variable Intake Manifolds (VIM)

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)

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)

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

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...