Application
This unit describes the performance outcomes required to inspect and service emission control systems on petrol or diesel powered engines. It involves preparing for the task, inspecting the system, reporting the inspection findings, servicing and adjusting the system, and completing workplace processes and documentation.
It applies to those working in the automotive service and repair industry. The emission control systems include those of agricultural equipment, heavy commercial vehicles, light vehicles, marine vessels, mobile plant machinery, motorcycles or outdoor power equipment.
This unit does not include emission control systems associated with engine management systems.
No licensing, legislative, regulatory or certification requirements apply to this unit at the time of publication.
Elements and Performance Criteria
Elements Elements describe the essential outcomes. | Performance Criteria Performance criteria describe the performance needed to demonstrate achievement of the element. Where bold and italicised text is used, further information is detailed in the range of conditions section. |
1. Prepare to inspect and service emission control system | 1.1 Job requirements are determined from workplace instructions 1.2 Servicing information is sourced and interpreted 1.3 Hazards associated with the work are identified and risks are managed 1.4 Tools, equipment and materials are selected and checked for serviceability |
2. Inspect emission control system | 2.1 Inspection is carried out according to manufacturer specifications, workplace procedures and safety requirements 2.2 Inspection results are compared with manufacturer specifications 2.3 Inspection findings are reported according to workplace procedures, including recommendations for necessary repairs or adjustments |
3. Service emission control system | 3.1 Service and adjustments are carried out according to manufacturer specifications, workplace procedures and safety requirements, and without causing damage to components or systems 3.2 Post-service testing is carried out according to workplace procedures |
4. Complete work processes | 4.1 Final inspection is made to ensure work is to workplace expectations and vehicle or machinery is presented ready for use 4.2 Work area is cleaned, waste and non-recyclable materials are disposed of, and recyclable material is collected 4.3 Tools and equipment are checked and stored according to workplace procedures 4.4 Workplace documentation is processed according to workplace procedures |
Evidence of Performance
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:
inspect and service two different vehicle or machinery emission control systems on petrol or diesel powered engines.
Evidence of Knowledge
Individuals must be able to demonstrate knowledge of:
work health and safety (WHS) and occupational health and safety (OHS) requirements relating to inspecting and servicing emission control systems, including procedures for working with vehicles and machinery that produce toxic exhaust gas
basic principles of emission control, including:
types of vehicle emissions and their effects on the environment
sources of emissions from petrol and diesel vehicles and machinery, including:
fuel system
engine crankcase
engine exhaust system
identification and function of emission control systems, including:
fuel evaporative control systems, including:
fuel tank and cap
charcoal canister
crankcase ventilation systems
exhaust emission control systems, including:
particulate filters
catalytic converters
exhaust gas recirculation (EGR) systems
supplementary catalytic reduction (SCR) systems
inspection procedures for emission control systems, including:
identifying deterioration and damage of components
checking for fuel or exhaust gas leaks
service and adjustment procedures for emission control systems, including cleaning or replacing components as required
post-service testing procedures for emission control systems.
Assessment Conditions
Assessors must satisfy NVR/AQTF assessor requirements.
Competency is to be assessed in the workplace or a simulated environment that accurately reflects performance in a real workplace setting.
Assessment must include direct observation of tasks.
Where assessment of competency includes third-party evidence, individuals must provide evidence that links them to the emission control systems that they have worked on, e.g. repair orders.
Assessors must verify performance evidence through questioning on skills and knowledge to ensure correct interpretation and application.
The following resources must be made available:
automotive repair workplace or simulated workplace
workplace instructions
manufacturer emission control system specifications
two different vehicles or machinery with emission control systems requiring servicing
equipment, tools and materials appropriate for inspecting and servicing emission control systems.
Foundation Skills
This section describes those language, literacy, numeracy and employment skills that are essential to performance and are not explicit in the performance criteria.
Skills | Description |
Learning skills to: | locate appropriate sources of information efficiently. |
Reading skills to: | interpret information from manufacturer and workshop literature when seeking service procedures and specifications relating to emission control systems. |
Writing skills to: | legibly and accurately fill out workplace documentation when reporting inspection findings, making recommendations, and recording parts and material used. |
Oral communication skills to: | clarify instructions report inspection findings and make repair recommendations. |
Problem solving skills to: | refer problems outside area of responsibility to appropriate person. |
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 | work health and safety (WHS) and occupational health and safety (OHS) requirements, including procedures for working with vehicles and machinery that produce toxic exhaust gas. |
Sectors
Technical - Emission and Exhaust
Competency Field
Mechanical Miscellaneous