Demonstrate knowledge of electronic components and their application in the automotive industry
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1 Page 1 of 5 Demonstrate knowledge of electronic components and their application in the automotive industry Level 3 Credits 5 Purpose This theory-based unit standard is for people in the automotive repair industry. People credited with this unit standard are able to demonstrate knowledge of: resistors and thermistors used in automotive electronic applications; diodes used in automotive electrical and electronic applications; transistors used in automotive circuits; operational amplifier application for automotive circuits; silicon controlled rectifiers (SCRs) and thyristors in automotive circuits; and sensors and actuators in automotive circuits. Subfield Domain Status Motor Industry Automotive Electrical and Electronics Registered Status date 25 January 2008 Date version published 25 January 2008 Planned review date 31 December 2012 Entry information Replacement information Accreditation Standard setting body (SSB) Recommended: Unit 21707, Demonstrate knowledge of automotive electrical principles, or demonstrate equivalent knowledge and skills. This unit standard, unit standard 24129, unit standard 24130, and unit standard replaced unit standard This unit standard and unit standard replaced unit standard This unit standard and unit standard replaced unit standard This unit standard and unit standard replaced unit standard Evaluation of documentation and visit by NZQA and industry. NZ Motor Industry Training Organisation (Incorporated) Accreditation and Moderation Action Plan (AMAP) reference 0014 This AMAP can be accessed at
2 Page 2 of 5 Special notes Information on automotive electronics can be found from: training provider, industry, or manufacturer courses; automotive electrical and electronic textbooks (contact a local book retailer, school or polytechnic library or the public library lending service); vehicle workshop manuals; useful websites include but are not limited to: Automotive Books Ltd Capital Books How Stuff Works New Zealand Book Find public libraries Technical Books Whitcoulls Elements and performance criteria Element 1 Demonstrate knowledge of resistors and thermistors used in automotive electronic applications. light dependent resistor (LDR), voltage dependent resistor (VDR), temperature dependent resistor (TDR). 1.1 Types of resistors and thermistors used for automotive electronic circuits are identified from textbook descriptions. 1.2 Operational characteristics of each of the range of resistors and thermistors are explained in accordance with textbook descriptions. 1.3 The effects of temperature change on resistors and thermistors are explained in accordance with textbook descriptions. positive temperature co-efficient (PTC), negative temperature coefficient (NTC). Element 2 Demonstrate knowledge of diodes used in automotive electrical and electronic applications. 2.1 p-n junction characteristics are described in accordance with textbook descriptions. positive and negative charged electron transfer, forward bias, reverse bias. 2.2 Diode operation is described in accordance with textbook descriptions. rectifier diode, Zener diode, light emitting diode (LED), photo diode.
3 Page 3 of Rectification patterns are identified by sketching alternating current (ac) halfwave and fullwave forms. 2.4 Diode ratings for a given automotive application are identified in accordance with textbook descriptions. wattage, current, forward and reverse voltage. 2.5 Use of diodes in an automotive application is described in terms of a dual charging system, transient protection, and a Zener diode as a voltage stabiliser. 2.6 Replacement procedure for a diode in an automotive circuit is described in accordance with diode rectifier diode, LED. Element 3 Demonstrate knowledge of transistors used in automotive circuits. 3.1 The symbols, operation, and terminal layout of transistors are described in accordance with bipolar junction transistor (BJT), field effect transistor (FET), Arlington transistor. 3.2 The use of a BJT as a switch in an automotive circuit is described in accordance with manufacturer specifications and textbook descriptions. on and off, high and low resistance. 3.3 Common emitter amplifier function is described in terms of signal inversion and application. 3.4 Automotive transistor testing procedures are described in accordance with forward and reverse junction resistance specifications. 3.5 Transistor bias is explained in accordance with forward and reverse junction. 3.6 Transistor gain is explained in accordance with textbook descriptions. single bipolar, Darlington pair.
4 Page 4 of 5 Element 4 Demonstrate knowledge of operational amplifier application for automotive circuits. 4.1 Symbols are described in accordance with textbook descriptions. 4.2 Amplifier function and operation are described in terms of current gain and application. inverting, non-inverting, comparators. Element 5 Demonstrate knowledge of SCRs and thyristors in automotive circuits. 5.1 Basic SCR operation in automotive circuits is described in accordance with symbol, action in ignition circuits and electric motor speed control. 5.2 SCR ratings for automotive circuits are described in accordance with voltage and current handling. Element 6 Demonstrate knowledge of sensors and actuators in automotive circuits. 6.1 The kinds of changes that are detected by the sensors are identified in accordance with changes in pressure, temperature, position, fluid level, flow rate, speed (linear and rotary), chemical content of a gas, magnetism. 6.2 The most common types of sensor used to detect each kind of change are identified by their method of measuring the change. pressure, temperature, position, fluid level, flow rate, speed (linear and rotary), chemical, magnetic. 6.3 The types of electrical components that are used as actuators are identified and their method of operation described in accordance with manufacturer specifications. motors, stepper motors, solenoids, relays.
5 Page 5 of 5 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.
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