Google Links

Follow the links below to find material targeted to the unit's elements, performance criteria, required skills and knowledge

Elements and Performance Criteria

1. Prepare to diagnose and repair light vehicle emission control system
   • Job requirements are determined from workplace instructions
   • Diagnostic information is sourced and interpreted
   • Diagnostic options are analysed and those most appropriate to the circumstances are selected
   • Hazards associated with the work are identified and risks are managed
   • Diagnostic tools and equipment are selected and checked for serviceability
2. Diagnose emission control system
   • Diagnostic tests are carried out according to workplace procedures and safety requirements
   • Faults are identified from diagnostic test results and causes of faults are determined
   • Diagnosis findings are reported according to workplace procedures, including recommendations for necessary repairs or adjustments
3. Repair emission control system
   • Repair information is sourced and interpreted
   • Repair options are analysed and those most appropriate to the circumstances are selected
   • Repair tools, equipment and materials are selected and checked
   • Repairs and component replacements and adjustments are carried out according to manufacturer specifications, workplace procedures and safety requirements, and without causing damage to components or system
   • Post-repair testing is carried out according to workplace procedures to confirm fault rectification, and any further problems detected as having been introduced during the repair process are rectified
4. Complete work processes
   • Final inspection is made to ensure work is to workplace expectations and vehicle is presented ready for use
   • Work area is cleaned, waste and non-recyclable materials are disposed of, and recyclable material is collected
   • Tools and equipment are checked and stored according to workplace procedures
   • Workplace documentation is processed according to workplace procedures
5. Prepare to diagnose and repair light vehicle emission control system
   • Job requirements are determined from workplace instructions
   • Diagnostic information is sourced and interpreted
   • Diagnostic options are analysed and those most appropriate to the circumstances are selected
   • Hazards associated with the work are identified and risks are managed
   • Diagnostic tools and equipment are selected and checked for serviceability
6. Diagnose emission control system
   • Diagnostic tests are carried out according to workplace procedures and safety requirements
   • Faults are identified from diagnostic test results and causes of faults are determined
   • Diagnosis findings are reported according to workplace procedures, including recommendations for necessary repairs or adjustments
7. Repair emission control system
   • Repair information is sourced and interpreted
   • Repair options are analysed and those most appropriate to the circumstances are selected
   • Repair tools, equipment and materials are selected and checked
   • Repairs and component replacements and adjustments are carried out according to manufacturer specifications, workplace procedures and safety requirements, and without causing damage to components or system
   • Post-repair testing is carried out according to workplace procedures to confirm fault rectification, and any further problems detected as having been introduced during the repair process are rectified
8. Complete work processes
   • Final inspection is made to ensure work is to workplace expectations and vehicle is presented ready for use
   • Work area is cleaned, waste and non-recyclable materials are disposed of, and recyclable material is collected
   • Tools and equipment are checked and stored according to workplace procedures
   • Workplace documentation is processed according to workplace procedures

Range Statement

This section specifies work environments and conditions that may affect performance. Essential operating conditions that may be present (depending on the work situation, needs of the candidate, accessibility of the item, and local industry and regional contexts) are included. Bold italicised wording, if used in the performance criteria, is detailed below.

Safety requirements must include:

work health and safety (WHS) and occupational health and safety (OHS) requirements, including procedures for working with vehicles that produce toxic emissions.

---

Performance Evidence

Before competency can be determined, individuals must demonstrate they can perform the following according to the standards defined in this unit’s elements, performance criteria, range of conditions and foundation skills:

diagnose and repair a fault in the emission control systems of two different light vehicles as follows:

one from the following systems:

positive crankcase ventilation system

evaporative control system

air injection system

one from the following systems:

exhaust emission control system

exhaust gas recirculation system

diesel engine particulate filter system

diesel engine selective catalytic reduction (SCR) system.

---

Knowledge Evidence

Individuals must be able to demonstrate knowledge of:

work health and safety (WHS) and occupational health and safety (OHS) requirements relating to diagnosing and repairing light vehicle emission control systems, including procedures for working with vehicles that produce toxic emissions

operating principles light vehicle emission control systems, including:

combustion chemistry and combustion emissions

engine blow-by

fuel volatility

application, purpose and operation of petrol and diesel light vehicle emission control systems and components, including:

evaporative control systems, including:

fuel tank vapour space

charcoal canister

crankcase ventilation systems, including:

positive crankcase ventilation (PCV)

diesel engine crankcase ventilation systems

exhaust emission control systems, including:

reduction and oxidation catalytic converters

air injection systems

diesel engine particulate filter systems

diesel engine SCR systems

exhaust gas recirculation (EGR) systems

emission control through engine design, including:

combustion chamber design

valve overlap

variable valve timing

diagnostic testing procedures for light vehicle emission control systems, including procedures for testing:

evaporative control system operation

crankcase ventilation system operation

catalytic converter operation

air injection system operation

diesel engine particulate filter system operation

diesel engine SCR system operation

exhaust gas analysis

EGR system operation

repair procedures for light vehicle emission control systems, including procedures for removing, replacing and adjusting the systems

post-repair testing procedures for light vehicle emission control systems.

---