Diagnose and rectify faults in a contact breaker (CB) ignition system on an engine




Yüklə 24.73 Kb.
tarix14.04.2016
ölçüsü24.73 Kb.

891 version 4

Page of


Diagnose and rectify faults in a contact breaker (CB) ignition system on an engine


Level

4

Credits

2


Purpose This unit standard is for people in the automotive industry. People credited with this unit standard are able to: diagnose faults in a CB ignition system on an engine; test CB ignition system components for faults; and rectify faults in a CB ignition system on an engine.


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 235, Describe automotive ignition systems and their operation, or demonstrate equivalent knowledge and skills.

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.
2 Definitions

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.

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
Diagnose faults in a CB ignition system on an engine.
Performance criteria
1.1 Safe working practices are observed throughout the task in accordance with legislative requirements.
Range personal safety, safety of others, vehicle or machine safety, workshop safety, environmental safety, tools and equipment safety.
1.2 Suitable tools and equipment are selected and used to enable the test to be carried out in accordance with service information.
1.3 The battery is tested for cranking voltage, and the result noted, in accordance with service information.
1.4 A check is made to determine if the distributor shaft turns when the engine is cranked, and whether the ignition cables and leads are connected in accordance with the manufacturer’s specified firing order, and the results are noted in accordance with service information.
1.5 A test is made to determine if high tension (HT) voltage is present at a spark plug and at the ignition coil, and the result noted, in accordance with service information.
1.6 Tests are made to determine if low tension (LT) voltage is present at the contacts and at the ignition coil with key on, engine off (KOEO) and when cranking, and the results noted in accordance with service information.
1.7 The initial ignition timing is checked with a timing light, and the result noted in accordance with service information.
1.8 The results of these tests are analysed in accordance with service information. Any faults and their probable causes are identified in accordance with company requirements.
Element 2
Test CB ignition system components for faults.
Performance criteria
2.1 Safe working practices are observed throughout the task in accordance with legislative requirements.
Range personal safety, safety of others, vehicle or machine safety, workshop safety, environmental safety, tools and equipment safety.
2.2 Suitable tools and equipment are selected and used to enable the test to be carried out in accordance with service information.
2.3 The HT components are tested for serviceability in accordance with service information, and any faults are identified and noted.
Range HT leads, distributor cap, rotor, ignition coil, spark plugs.
2.4 The distributor is checked, and any faults identified and noted, in accordance with service information.
Range cam, cam shaft, and bush wear; operation of automatic advance mechanisms; condition of contacts and condenser.
2.5 The ballast resistor is tested, and any faults identified and noted, in accordance with service information.
Element 3
Rectify faults in a CB ignition system on an engine.
Performance criteria
3.1 Safe working practices are observed throughout the task in accordance with legislative requirements.
Range personal safety, safety of others, vehicle or machine safety, workshop safety, environmental safety, tools and equipment safety.
3.2 Suitable tools and equipment are selected and used to enable faults to be rectified in accordance with service information.
3.3 All unserviceable components are replaced with ones that meet manufacturer specifications.
Range any components identified as faulty as a result of the system and component tests.
3.4 The dwell angle and spark plug electrode clearances are adjusted to manufacturer specifications.
3.5 The centrifugal and vacuum advance mechanisms are checked and adjusted if necessary to comply with manufacturer specifications.
3.6 The initial ignition timing is adjusted to manufacturer specifications.
3.7 Tools and equipment are put away in their place, and the work area is clean in accordance with company requirements.
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.

Ó New Zealand Qualifications Authority 2016


Verilənlər bazası müəlliflik hüququ ilə müdafiə olunur ©www.azrefs.org 2016
rəhbərliyinə müraciət

    Ana səhifə