974 version 4
28-Jun-16
1 of 4
VEHICLE BRAKING SYSTEMS
Diagnose and rectify faults in a car or
light commercial vehicle anti-lock
braking system (ABS)
level:
5
credit:
4
planned review date:
December 2008
sub-field:
Motor Industry
purpose:
This unit standard is for people in the automotive repair
industry. People credited with this unit standard are able to:
demonstrate knowledge of ABS fitted to cars and light
commercial vehicles; test a vehicle's ABS for faults; and
rectify ABS faults.
entry information:
Prerequisite: Class 1 driver licence.
Recommended: Unit 960, Diagnose and rectify brake system
faults on cars or light commercial vehicles, or demonstrate
equivalent knowledge and skills.
accreditation option:
Evaluation of documentation and visit by NZQA and industry.
moderation option:
A centrally established and directed national moderation
system has been set up by the NZ Motor Industry Training
Organisation.
special notes:
1
The following legislation and other sources must be
consulted and followed where applicable:
Health and Safety in Employment Act 1992;
Traffic Regulations 1976;
New Zealand Road Code, Land Transport New
Zealand.
2
Reference to 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 to a professional and competent
manner with due regard to safe working practices.
 New Zealand Qualifications Authority 2016
974 version 4
28-Jun-16
2 of 4
VEHICLE BRAKING SYSTEMS
Diagnose and rectify faults in a car or
light commercial vehicle anti-lock
braking system (ABS)
Elements and Performance Criteria
element 1
Demonstrate knowledge of ABS fitted to cars and light commercial vehicles.
performance criteria
1.1
The function and operation of a car and light commercial vehicle ABS are
described according to the vehicle manufacturer’s workshop manual
descriptions.
Range:
1.2
may include but is not limited to – one, two, three, and four
channel systems.
The major components are identified, and their function is described according
to the vehicle manufacturers’ workshop manual descriptions.
Range:
may include but is not limited to – speed sensors, electronic
control module (ECM), hydraulic unit, gravity (G) sensor,
proportioning valve, stop lamp switch, master cylinder.
element 2
Test a vehicle's ABS for faults.
performance criteria
2.1
Safe working practices are observed throughout the task.
Range:
personal safety, safety of others, equipment and vehicle safety.
2.2
Suitable tools and equipment are selected and used to enable the tests to be
carried out.
2.3
No damage to circuit components and electronic devices occurs as a result of
using test instruments.
2.4
The total braking system is checked visually, and any obvious faults are
identified and rectified.
 New Zealand Qualifications Authority 2016
974 version 4
28-Jun-16
3 of 4
VEHICLE BRAKING SYSTEMS
Diagnose and rectify faults in a car or
light commercial vehicle anti-lock
braking system (ABS)
Range:
may include but is not limited to – fluid leaks, broken and loose
components, blown fuse, disconnected wires.
2.5
The self-test codes are activated, read, and interpreted, according to the vehicle
manufacturers' instructions, to identify any circuit that has a fault.
2.6
The vehicle is road tested for brake operation in compliance with the Road
Code, and care is taken to avoid creating a hazard to self and other road users.
2.7
The vehicle is operated to reproduce the fault symptoms, and the symptoms
and the conditions when they occur are noted.
2.8
The circuit indicated by the self-test codes and its components is tested
according to the vehicle manufacturers' instructions, and the fault is located and
identified.
element 3
Rectify ABS faults.
performance criteria
3.1
Safe working practices are observed throughout the task.
Range:
personal safety, safety of others, equipment and vehicle safety.
3.2
Any faulty ABS components are replaced according to the vehicle
manufacturer's specifications.
3.3
Wiring faults are repaired, according to the vehicle manufacturer's
specifications, to restore full serviceability.
3.4
Fluid leaks are rectified, according to the vehicle manufacturer's instructions, to
restore full serviceability.
3.5
The system is bled of air following the vehicle manufacturer's instructions.
3.6
The self-test memory is cleared of faults in the manner prescribed by the
vehicle manufacturer.
3.7
The road test is repeated to ensure that the braking fault has been rectified.
 New Zealand Qualifications Authority 2016
974 version 4
28-Jun-16
4 of 4
VEHICLE BRAKING SYSTEMS
Diagnose and rectify faults in a car or
light commercial vehicle anti-lock
braking system (ABS)
3.8
Self-test system is rechecked after a road test to ensure that the braking fault
has been rectified.
Comments on this unit standard
Please contact the NZ Motor Industry Training Organisation jlane@mito.org.nz if you wish
to suggest changes to the content of this unit standard.
Please Note
Providers must be accredited by the Qualifications Authority or a delegated interinstitutional body before they can register credits from assessment against unit standards
or deliver courses of study leading to that assessment.
Industry Training Organisations must be accredited by the Qualifications Authority 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 providers wishing to
develop education and training programmes, such as minimum qualifications for tutors and
assessors, and special resource requirements.
This unit standard is covered by AMAP 0014 which can be accessed at
http://www.nzqa.govt.nz/site/framework/search.html.
 New Zealand Qualifications Authority 2016