Application
This unit describes the performance outcomes required to service and repair outdoor power equipment engine management systems (EMS) according to manufacturer specifications. It involves preparing for the task, determining the service and repair requirements, carrying out the service and repair, performing post-repair testing, and completing workplace processes and documentation.
It applies to those working in the outdoor power equipment service and repair industry. The EMS include electronic fuel injection and emission systems in hand-held or wheeled equipment. EMS may include those of two- and four-stroke spark ignition engines.
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 service and repair EMS | 1.1 Job requirements are determined from workplace instructions 1.2 Service and repair procedures and information are 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. Determine service and repair requirements of EMS | 2.1 System is inspected and tested according to manufacturer specifications, workplace procedures, and safety requirements 2.2 Faults are identified from inspection and causes of faults are determined 2.3 Inspection findings and test results are reported according to workplace procedures, and include recommendations for necessary service, repair or adjustment 2.4 Authorisation to proceed with service and repair is obtained according to workplace procedures |
3. Carry out service and repair activities | 3.1 Service and repair options are analysed and those most appropriate to the circumstances are selected 3.2 Tools, equipment and materials are selected and checked 3.3 Components are removed and inspected for serviceability according to manufacturer specifications, workplace procedures, and safety and environmental requirements 3.4 Reusable, repaired and replacement components are fitted and adjusted according to manufacturer specifications and workplace procedures |
4. Check EMS for normal operation | 4.1 System is operated and compared to manufacturer specifications according to workplace procedures and safety requirements 4.2 Adjustments are made as required and EMS is re-tested |
5. Complete work processes | 5.1 Final inspection is made to ensure work is to workplace expectations and equipment is presented ready for use, including protective guards, cowlings and safety features 5.2 Work area is cleaned, waste and non-recyclable materials are disposed of, and recyclable material is collected 5.3 Tools and equipment are checked and stored according to workplace procedures 5.4 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:
use diagnostic tools to perform checks on two different outdoor power equipment engine management systems (EMS), in which the work must involve validating error codes and downloading EMS software
service and repair the above two outdoor power equipment EMS, in which the work must involve the following components:
fuel injection pump
fuel injector or carburettor
spark plug
ignition coil pack
generator or compensator
electronic control unit
sensors, including:
crankshaft angle
engine speed sensor
crankcase temperature and pressure sensor
emission control systems
on two occasions carry out EMS diagnosis, calibration and adjustment using relevant manufacturer engine diagnosis device.
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 servicing and repairing engine management systems, including procedures for:
selecting and using personal protective equipment (PPE)
working with electrical systems
operating engines safely
environmental requirements, including procedures for trapping, storing and disposing of fuel released from the EMS
operating principles of outdoor power equipment EMS, including:
air fuel ratios and chemistry of combustion
composition of petrol fuel, including octane rating
open and closed loop injection
engine emissions
application, purpose and operation of EMS components, including:
fuel system components:
fuel injection pump
fuel injector
tank, cap and lines
electronic control system components:
electronic control unit
throttle position sensor
generator
crankshaft angle and engine speed
crankcase air temperature and pressure sensor
manifold absolute pressure (MAP) sensor
oxygen sensor
ignition system, including:
spark plug
high tension lead
coil
engine emission control system, including:
emission standards
engine emission design technology
evaporative
exhaust
crankcase
identification, selection and operation of EMS diagnostic tools relevant to the engine brand and system type
procedures for system data retrieval in order to determine usage of product, fuel quality values, system parameters and service history
service and repair procedures available from EMS manufacturer manuals, including removal, replacement, calibration and adjustment procedures for EMS, including:
fuel system
ignition system
electronic control system
emission control system
post-repair testing procedures for EMS, including:
operating engine system through full operating range
verify manufacturer specifications
performance benchmarking product against specifications.
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 EMS that they have serviced and repaired, 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:
outdoor power equipment repair workplace or simulated workplace
workplace instructions
manufacturer specifications for EMS
area and equipment, including PPE, required to safely test EMS
two outdoor power equipment EMS requiring service and repair
tools, equipment and materials appropriate for servicing and repairing EMS, including:
industry relevant engine diagnosis devices, including computer and system software, communications adaptor and connecting cables
multimeter.
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 EMS specifications and procedures. |
Writing skills to: | legibly and accurately fill out workplace documentation when reporting inspection findings, making repair recommendations, and recording parts and material used. |
Numeracy skills to: | measure EMS components and use basic mathematical operations, including addition and subtraction, to calculate distances, tolerances and deviations from manufacturer specifications measure electrical components for comparison to manufacturer specifications. |
Planning and organising skills to: | plan own work requirements and prioritise actions to achieve required outcomes and ensure tasks are completed within workplace timeframes. |
Technology skills to: | use diagnostic EMS equipment. |
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.
Service and repair procedures must include: | inspecting, servicing, repairing and replacing components performing diagnostic routines reading and resetting error codes testing repaired units documenting and reporting service and repair procedures. |
Safety requirements must include: | work health and safety (WHS) and occupational health and safety (OHS) requirements, including procedures for: selecting and using personal protective equipment (PPE) working with electrical systems operating engines safely. |
Environmental requirements must include: | procedures for trapping, storing and disposing of fuel released from the EMS. |
Sectors
Technical- Electrical and Electronic
Competency Field
Outdoor Power Equipment