24182 Diagnose and Rectify Faults in a Liquefied Petroleum Gas (LPG) Vehicle Fuel System
24182 version 1
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Diagnose and rectify faults in a liquefied petroleum gas (LPG) vehicle fuel system
Level / 4Credits / 3
PurposeThis unit standardis for people in the automotive repair industry. People credited with this unit standard are able to: carry out regular maintenance procedures on an LPG fuel system; test an LPG fuel system for faults; and rectify LPG fuel system faults and their causes.
Subfield / Motor IndustryDomain / Automotive Fuel Systems and Exhaust
Status / Registered
Status date / 25 January 2008
Date version published / 25 January 2008
Planned review date / 31 December 2012
Entry information / Prerequisite: Unit 24181, Demonstrate knowledge of engine tuning procedures and equipment malfunction causes on LPG fuelled vehicles, or demonstrate equivalent knowledge and skills.
Replacement information / This unit standard and unit standard 24181 replaced unit standard 951.
Accreditation / Evaluation of documentation and visit by NZQA and industry.
Standard setting body (SSB) / NZ Motor Industry Training Organisation (Incorporated)
Accreditation and Moderation Action Plan (AMAP) reference / 0014
This AMAP can be accessed at
Special notes
1Legislation and publications relevant to this unit standard include but are not limited to – Health and Safety in Employment Act 1992; Traffic Regulations 1976; Land Transport Rules: Vehicle Repair 1998, Rule 34001;Vehicle Standards Compliance 2002, Rule 35001/1; Vehicle Standards Compliance Amendment 2005, Rule 35001/2; New Zealand Standard AS/NZS 1425:2007 LP Gas for fuel systems for vehicle engines.
2Land Transport Rules are produced for the Minister of Transport by Land Transport New Zealand. These rules are available online at
New Zealand Standards are available from Standards New Zealand, Private Bag 2439, Wellington; phone 04 498 5990; or website
3Definitions
Company requirements refer to instructions to staff on policy and procedures which are documented in memo or manual format and are available in the workplace. These requirements include but are not limited to – company specifications and procedures, work instructions, manufacturer specifications, product quality specifications, and legislative requirements.
LPG equipment manufacturer instructions refer to specifications and instructions provided by the equipment manufacturer for the correct installation and operation of the LPG component(s) or system(s) provided by that manufacturer.
Suitable tools and equipment means industry approved tools and equipment that are recognised within the industry as being the most suited to complete the task in a professional and competent manner with due regard to safe working practices.
Elements and performance criteria
Element 1
Carry out regular maintenance procedures on an LPG fuel system.
Performance criteria
1.1Safety precautions are taken when carrying out maintenance work in accordance with legislative requirements and AS/NZS 1425.
1.2Suitable tools and equipment are selected and used to enable the system to be serviced in accordance with LPG equipment manufacturer instructions and AS/NZS 1425.
1.3Regular maintenance to the gaseous fuel equipment is completed in accordance with LPG equipment manufacturer instructions, AS/NZS 1425 and legislative requirements.
Rangeclean filter, drain regulator, replace air filter, detect leaks, secure components, inspect hose condition, inspect mixer attachment for security and operation.
Element 2
Test an LPG fuel system for faults.
Rangeequipment malfunction, poor starting, poor performance.
Performance criteria
2.1Safety precautions are taken when carrying out tests in accordance with AS/NZS 1425.
2.2Suitable tools and equipment are selected and used to enable the system to be tested in accordance with LPG equipment manufacturer instructions and AS/NZS 1425.
2.3The vehicle is operated to reproduce the symptoms of the fault reported by the customer, and all details concerning the symptoms and the conditions when they occur are identified and noted in accordance with company requirements.
2.4The fault symptoms, conditions when they occur, and any test results are analysed, and a likely cause is determined in accordance with LPG equipment manufacturer instructions.
Element 3
Rectify LPG fuel system faults and their causes.
Performance criteria
3.1Safety precautions are taken when carrying out repair work in accordance with AS/NZS 1425.
3.2Suitable tools and equipment are selected and used to enable system faults to be rectified in accordance with LPG equipment manufacturer instructions and AS/NZS 1425.
3.3Faulty LPG system components are repaired and/or replaced in accordance with LPG equipment manufacturer instructions, and comply with AS/NZS 1425 and legislative requirements.
3.4A leak test is performed after repairs and replacement of components in accordance with AS/NZS 1425.
Please note
Providers must be accredited by NZQA, or an inter-institutional body with delegated authority for quality assurance, before they can report credits from assessment against unit standards or deliver courses of study leading to that assessment.
Industry Training Organisations must be accredited by NZQA before they can register credits from assessment against unit standards.
Accredited providers and Industry Training Organisations assessing against unit standards must engage with the moderation system that applies to those standards.
Accreditation requirements and an outline of the moderation system that applies to this standard are outlined in the Accreditation and Moderation Action Plan (AMAP). The AMAP also includes useful information about special requirements for organisations wishing to develop education and training programmes, such as minimum qualifications for tutors and assessors, and special resource requirements.
Comments on this unit standard
Please contact the NZ Motor Industry Training Organisation (Incorporated) if you wish to suggest changes to the content of this unit standard.
New Zealand Qualifications Authority 2018