24091 version 1
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Inspect, diagnose, and rectify faults in engine management systems
Level
4
Credits
6
Purpose
This unit standard is for people in the automotive industry. People credited
with this unit standard are able to inspect and diagnose engine management
problems; and rectify faults in an engine management system.
Subfield
Motor Industry
Domain
Automotive Electrical and Electronics
Status
Registered
Status date
25 January 2008
Date version published
25 January 2008
Planned review date
31 December 2012
Entry information
Recommended: Unit 24090, Demonstrate knowledge of
diagnosing faults in engine management systems; and
Unit 5459, Demonstrate knowledge of automotive
electronic fuel injection system operation, and fault
diagnosis and repair; or demonstrate equivalent
knowledge and skills.
Replacement information
This unit standard and unit standard 24090 replaced unit
standard 892, unit standard 961, and unit standard
5460.
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 http://www.nzqa.govt.nz/framework/search/index.do.
Special notes
1
Legislation relevant to this unit standard includes but is not limited to – Health and
Safety in Employment Act 1992; Land Transport Rule: Vehicle Repair 1998, Rule
34001.
 New Zealand Qualifications Authority 2016
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2
Land Transport Rules are produced for the Minister of Transport by Land Transport
New Zealand. These rules are available online at
http://www.landtransport.govt.nz/rules/.
3
Definitions
Service information may include but is not limited to – technical information of a
vehicle, machine, or product detailing operation; installation and servicing
procedures; manufacturer instructions and specifications; technical terms and
descriptions; and detailed illustrations. This can be accessed in hard copy or
electronic format and is normally sourced from the 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
Inspect and diagnose engine management problems.
Performance criteria
1.1
Safe working practices and service precautions are observed throughout the
task in accordance with service information and legislative requirements.
Range
1.2
The symptoms of the problem stated are confirmed in accordance with service
information.
Range
1.3
personal safety, safety of others, vehicle or machine safety,
workshop safety, environmental safety, tools and equipment
safety;
service precautions may include but are not limited to – highvoltage electrical systems.
customer information, trouble-shooting charts, testing the vehicle.
The engine management system and the engine compartment are checked
visually to ensure no obvious faults exist in accordance with service information.
Range
includes but is not limited to – loose and leaking fuel and coolant
pipes and hoses, loose and disconnected wires and connectors,
low fluid levels, loose and missing drive belts, any other loose and
broken components.
1.4
Suitable test equipment is selected and used to enable faults to be diagnosed in
accordance with service information.
1.5
No damage is caused to circuit components and electronic devices when using
test instruments in accordance with service information.
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1.6
The activation routine for the self-diagnostic system is carried out in accordance
with service information.
1.7
The faulty subsection is isolated in accordance with service information.
Range
includes but is not limited to – air, fuel, sensors, control, voltage
supply and return.
1.8
Circuits not monitored by a self-diagnostic system are tested, and any faults are
located and identified in accordance with service information.
1.9
Fuel injection operation is tested to determine the nature of any faults in
accordance with service information.
Range
tests may include but are not limited to – adjustments, noise,
leakage, pulse, fuel pressure and volume.
1.10
Exhaust emissions and engine speed are measured at normal operating
temperature and the results noted in accordance with service information.
1.11
The results of the tests and observations are noted and compared with vehicle
specifications, and analysed to locate and identify the cause of any fault in
accordance with service information.
Element 2
Rectify faults in an engine management system.
Performance criteria
2.1
Safe working practices and service precautions are observed throughout the
task in accordance with service information and legislative requirements.
Range
personal safety, safety of others, vehicle or machine safety,
workshop safety, environmental safety, tools and equipment
safety;
service precautions may include but are not limited to – highvoltage electrical systems.
2.2
Suitable tools and equipment are used to enable system faults to be rectified in
accordance with service information.
2.3
Service precautions are carried out to prevent damage to electronic
components in accordance with service information.
2.4
Faults and their causes are corrected by repair, replacement, or adjustment as
specified by service information, to enable normal engine management system
operation to be restored.
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2.5
Self-diagnostic test codes are cleared and subsequent upgrades installed in
accordance with service information.
2.6
Road test is performed under controlled conditions of customer complaint to
confirm faults have been rectified.
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)
info@mito.org.nz if you wish to suggest changes to the content of this unit standard.
 New Zealand Qualifications Authority 2016