Assessment Requirements for AURTTL011 Diagnose complex faults in CNG fuel systems

Release: 1

Assessment Requirements for AURTTL011 Diagnose complex faults in CNG fuel systems

Modification History

Release	Comment
Release 1	New unit of competency.

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 a complex fault in three different compressed natural gas (CNG) systems

the above diagnosis must involve two of the following types of complex faults:

an intermittent fault

a fault that affects more than one system

a fault introduced as a result of a system repair

an indirect fault caused by the influence of external systems.

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 complex faults in CNG fuel systems, including procedures for working with lighter-than-air flammable gas

environmental requirements, including procedures for preventing loss of gas to atmosphere

types of complex faults relating to CNG fuel systems, including:

intermittent

multi-system

introduced as a result of system repair

indirect, caused by the influence of external systems

types, functions and operation of CNG fuel systems, including:

fuel lock-offs

injectors

mixers

metering units

requirements of AS/NZS 2739 Natural gas (NG) fuel systems for vehicle engines

testing procedures for CNG fuel systems, including:

component failure analysis

safety component operation

electrical control systems

exhaust emissions

on-road fuel efficiency

data interpretation

types, functions, operation and limitations of diagnostic testing equipment required to diagnose complex faults in CNG fuel systems

procedures for accessing and interpreting scan tool system data, including:

diagnostic trouble codes (DTCs), including:

conditions that set the DTCs

conditions for running DTCs

live data

freeze frame data

waveforms

vehicle continuous and non-continuous monitored systems

methods and processes for documenting and reporting diagnostic findings and recommendations.

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 CNG fuel 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

AS/NZS 2739 Natural gas (NG) fuel systems for vehicle engines

manufacturer CNG fuel system specifications

three different CNG fuel systems with complex faults

CNG fuel system diagnostic equipment, including scan tool

tools, equipment and materials appropriate for diagnosing complex faults in CNG fuel systems.

Links

Companion Volume implementation guides are found in VETNet - https://vetnet.education.gov.au/Pages/TrainingDocs.aspx?q=b4278d82-d487-4070-a8c4-78045ec695b1

Companion Volume implementation guides are found in VETNet - https://vetnet.education.gov.au/Pages/TrainingDocs.aspx?q=b4278d82-d487-4070-a8c4-78045ec695b1