Unit of competency Outline

Date retreived
22/07/2026 11:43 PM AWST

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Diagnose complex faults in LNG fuel systems

Diagnose complex faults in LNG fuel systems

Unit of competency
National Code
AURTTL112
State Code
OCL15
TGA Status
Current
DTWD Status
Approved
Current Release Number
1.00
Current Release Date
13/11/2020
View on TGA
State Implementation and Classification
Approved Date
31/03/2021
Field of Education
030503 - Vehicle Mechanics
Original Release Date
31/03/2021
Nominal Hours
45
Description
This unit describes the skills and knowledge required to diagnose complex faults in liquefied natural gas (LNG) fuel systems and determine the repair action necessary to restore system performance. It involves confirming the existence of a fault, choosing the diagnostic procedure and tools, applying the diagnostic procedure, reporting conclusions and making repair recommendations. Complex faults are outside the normal scope of a technician’s diagnosis and repair work. They include intermittent faults, multi-system faults, faults introduced as a result of system repairs, and indirect faults caused by the influence of external systems, requiring the application of complex diagnostic processes to resolve.The unit applies to those working in the automotive service and repair industry. The LNG fuel systems include those in vehicles from all sectors of the industry.Licensing, legislative, regulatory or certification requirements may apply to this unit in some jurisdictions. Users are advised to check with the relevant regulatory authority.
Notes
Elements and Performance Criteria
1. Identify and confirm the work requirement
  • 1.1 Determine nature and objective of diagnosis requirements from workplace instructions
  • 1.2 Confirm existence of fault in LNG fuel system from direct or indirect evidence
  • 1.3 Identify hazards associated with the work and manage risks according to workplace procedures, and safety and environmental requirements
2. Prepare to diagnose complex faults
  • 2.1 Access and interpret manufacturer specifications and other technical information for LNG fuel system
  • 2.2 Identify diagnostic procedures and options
  • 2.3 Select diagnostic method sequence, tests and testing processes from the range of identified options
  • 2.4 Select and prepare testing equipment according to manufacturer specifications and workplace procedures
  • 2.5 Identify, select and prepare tools, equipment and materials required to support the diagnostic process for use
3. Apply diagnostic procedures
  • 3.1 Follow selected diagnostic process and carry out testing according to manufacturer specifications, workplace procedures, and safety and environmental requirements
  • 3.2 Confirm diagnostic findings, as required, by using alternative or optional process according to manufacturer specifications and workplace procedures
  • 3.3 Draw and document conclusions from findings according to workplace procedures, and develop recommendations for required repairs that comply with AS/NZS 2739 Natural gas (NG) fuel systems for vehicle engines
  • 3.4 Provide conclusions to required personnel or customer to confirm further action to be taken
4. Complete work processes
  • 4.1 Conduct final inspection according to workplace procedures and confirm vehicle is ready for use
  • 4.2 Clear work area and dispose of or recycle materials according to workplace procedures
  • 4.3 Complete documentation according to workplace procedures
No information
No information
Replaces
State Code National Code Title Type
AXA50 AURTTL012 Diagnose complex faults in LNG fuel systems Unit of competency