NZQA Expiring unit standard
901 version 5
Page 1 of 4
Title
Diagnose and rectify vehicle power-assisted steering system faults
Level
4
Credits
4
Purpose
This unit standard is for people in the automotive repair
industry. People credited with this unit standard are able to:
pressure test a power assisted steering system; rectify faults in
a power assisted steering system; and overhaul a power
steering pump.
Classification
Motor Industry > Vehicle Steering and Suspension
Available grade
Achieved
Entry information
Critical health and
safety prerequisites
Unit 237, Describe automotive brake, steering, and suspension
systems, and their operation, or demonstrate equivalent
knowledge and skills.
Explanatory notes
1
The following legislation, regulations, and their amendments are required to be
consulted and followed where applicable:
– Health and Safety in Employment Act, 1992
– Resource Management Act, 1991 (for disposal of fluid)
– Transport (Vehicle Standards) Regulations, 1990.
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.
NZ Motor Industry Training Organisation
(Incorporated)
SSB Code 101542
 New Zealand Qualifications Authority 2016
NZQA Expiring unit standard
901 version 5
Page 2 of 4
Outcomes and evidence requirements
Outcome 1
Pressure test a power assisted steering system.
Evidence requirements
1.1
Safe working practices are observed throughout the task.
Range
personal safety, safety of others, equipment safety, vehicle and
machine safety.
1.2
Suitable equipment and tools are selected and used to enable the system to be
pressure tested.
1.3
The vehicle is prepared for testing the power steering system according to the
vehicle manufacturer's instructions.
1.4
The steering pump pressures are checked in accordance with the equipment
manufacturer's instructions, and are recorded.
1.5
The cause of any abnormal results is determined by analysing the test results
and comparing them with manufacturer's specifications.
Outcome 2
Rectify faults in a power assisted steering system.
Evidence requirements
2.1
Safe working practices are observed throughout the task.
Range
personal safety, safety of others, equipment safety, vehicle and
machine safety.
2.2
The power steering fluid is drained, collected, and disposed of by an
environmentally safe method.
2.3
Faulty power steering components are replaced according to manufacturer's
specifications and vehicle standards regulations and in a manner that restores
full serviceability.
Range
reservoir, pump, steering rack and/or steering box.
2.4
The power steering system is primed and topped up with the specified hydraulic
fluid, and all air is bled from the system.
2.5
The power steering system is tested to ensure compliance with manufacturer's
specifications.
NZ Motor Industry Training Organisation
(Incorporated)
SSB Code 101542
 New Zealand Qualifications Authority 2016
NZQA Expiring unit standard
901 version 5
Page 3 of 4
Outcome 3
Overhaul a power steering pump.
Evidence requirements
3.1
Safe working practices are observed throughout the task.
Range
personal safety, safety of others, equipment safety, vehicle and
machine safety.
3.2
Suitable tools and equipment are selected and used to enable the pump to be
overhauled.
3.3
The power steering pump is cleaned externally to prevent the ingress of dirt and
foreign matter during disassembly.
3.4
The pump is disassembled in the sequence and manner prescribed by the
manufacturer.
3.5
All parts are inspected for wear, and those that are worn beyond the
manufacturer's service limits are replaced with new parts to manufacturer's
specifications.
3.6
All parts are inspected for damage, and those that are damaged are replaced
with new parts to manufacturer's specifications and vehicle standards
regulations.
3.7
The pump is assembled and adjusted to specification, in the sequence and
manner prescribed by the manufacturer, using new replacement parts, the
specified lubricant, and new seals.
3.8
The pump is tested to ensure compliance with manufacturer's specifications.
Replacement information
This unit standard has been replaced by unit standard
24426, unit standard 24427, and unit standard 24428.
This unit standard is expiring. Assessment against the standard must take place by
the last date for assessment set out below.
NZ Motor Industry Training Organisation
(Incorporated)
SSB Code 101542
 New Zealand Qualifications Authority 2016
NZQA Expiring unit standard
901 version 5
Page 4 of 4
Status information and last date for assessment for superseded versions
Process
Version Date
Last Date for Assessment
Registration
1
29 October 1993
31 December 2016
Review
2
4 October 1996
31 December 2016
Review
3
26 February 1999
31 December 2016
Review
4
25 January 2008
31 December 2016
Rollover
5
19 November 2010
31 December 2016
Accreditation and Moderation Action Plan (AMAP) reference
0014
This AMAP can be accessed at http://www.nzqa.govt.nz/framework/search/index.do.
Please note
Providers must be granted consent to assess against standards (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 granted consent to assess against standards by
NZQA before they can register credits from assessment against unit standards.
Providers and Industry Training Organisations, which have been granted consent and
which are assessing against unit standards must engage with the moderation system that
applies to those standards.
Consent 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.
NZ Motor Industry Training Organisation
(Incorporated)
SSB Code 101542
 New Zealand Qualifications Authority 2016