Self Study Program 315 – European On-Board Diagnosis for Diesel Engines

VAG SSP 315. On-Board Diagnosis (OBD) systems are required to be installed in diesel passenger cars Europe-wide from 2004 onwards. OBD has been compulsory for petrol-driven vehicles since 2000.

Like the US variant OBD II, the European On-Board Diagnosis (EOBD) features a standardised diagnosis interface, as well as storage and indication of faults relevant to exhaust emissions. EOBD has been adapted to comply with European exhaust emission standards.

Goals of EOBD:

  • continuous monitoring of components relevant to exhaust emissions in vehicles
  • immediate detection of faults that can lead to an increase in emissions
  • indication of faults relevant to exhaust emissions to the driver
  • continuously low exhaust emissions in daily vehicle operation


  • Brief overview
  • System overview
  • EOBD routine
    • Scope of testing of EOBD
    • The commencement of injection control deviation
    • BIP control
    • The exhaust gas recirculation position control
    • The exhaust gas recirculation control deviation
    • The glow plug system
    • The CAN data bus diagnosis
    • The charge pressure control deviation
    • The metering adjuster
    • The distributor type injection pump
    • Comprehensive Components
    • Monitoring
    • The particle filter system
    • The lambda probe heater control
    • The monitoring of individual sensors
  • Service
  • Glossary
    • Explanation of HIGHLIGHTED terms
  • Test yourself

This self-study programme shows the design and function of new developments! The contents will not be updated. For current inspection, adjustment and repair instructions, please refer to the relevant service literature.

Language: English
Format: PDF
Pages: 60

Self Study Program 315 – European On-Board Diagnosis for Diesel Engines Design and function PDF free online