Unit Injector System Diagnosis

VSD16 A Bosch Certified Course

The principle of Unit Injection has been around since the 1930’s where mechanical or hydraulic control was used to meter the injected fuel quantity. With the introduction of electronics into the world of diesel, these older principles were re-examined and enhanced by Bosch who introduced electronically controlled Unit Injection in 1994. The Unit Injection System (UIS) can produce very high working pressures and therefore provides the manufacturer with an alternative to the Common Rail principle.

The aim of this course is to introduce automotive technicians to the Unit Injection concepts and provide information regarding system diagnosis and safety procedures. The trainee will gain valuable in-depth knowledge of the electronic sensors and hydraulic components in the system. Use will be made of the latest tools for diesel injection systems diagnosis, and also oscilloscopes, to provide visual interpretation and analysis of signals.

Completion of courses VSE1, VSTD9, VSG5 and VSD12 is a prerequisite to attending VSD16. Course VSD12 in particular provides the necessary background knowledge on diesel theory, sensors and actuators. Delegates must be familiar with typical oscilloscope and diagnostic tester operation and should have attended the appropriate equipment operator’s courses.

The course is divided into linked modules, which allow the essential underpinning theory and practical skills knowledge to be delivered effectively.

Modules and subject areas

  • Overview of the system layout and design concepts
  • Design and function of key components
  • Injector design and operation
  • Emissions control sub-systems
  • System specific functions
  • System testing and diagnosis

On successful completion of VSD16 delegates will be able to:

  • Evaluate service information to identify the test procedures for the systems.
  • Identify and state the function of sensors, components and actuators relating to Unit Injector systems as well as diagnosing system running faults.

Price: £300 + VAT

Duration: 2 day


Dates and Venues

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"All the technicians that attended the course, sited at Hull GTA, recalled an informative, well structured and enjoyable course with good facilities."

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