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SOUTH AFRICAN QUALIFICATIONS AUTHORITY

REGISTERED UNIT STANDARD THAT HAS PASSED THE END DATE:

Diagnose and repair engine management systems

SAQA US ID	UNIT STANDARD TITLE
12231	Diagnose and repair engine management systems
ORIGINATOR
SGB Manufacturing and Assembly Processes
PRIMARY OR DELEGATED QUALITY ASSURANCE FUNCTIONARY
-
FIELD			SUBFIELD
Field 06 - Manufacturing, Engineering and Technology			Manufacturing and Assembly
ABET BAND	UNIT STANDARD TYPE	PRE-2009 NQF LEVEL	NQF LEVEL	CREDITS
Undefined	Regular	Level 5	Level TBA: Pre-2009 was L5	20
REGISTRATION STATUS		REGISTRATION START DATE	REGISTRATION END DATE	SAQA DECISION NUMBER
Passed the End Date - Status was "Reregistered"		2018-07-01	2023-06-30	SAQA 06120/18
LAST DATE FOR ENROLMENT		LAST DATE FOR ACHIEVEMENT
2024-06-30		2027-06-30

In all of the tables in this document, both the pre-2009 NQF Level and the NQF Level is shown. In the text (purpose statements, qualification rules, etc), any references to NQF Levels are to the pre-2009 levels unless specifically stated otherwise.

This unit standard does not replace any other unit standard and is not replaced by any other unit standard.

PURPOSE OF THE UNIT STANDARD

The skills, values and knowledge reflected in this unit standard are required by people in the field of autotronics.

The learning outcomes in this unit standard also contribute to the exit level outcomes required for the autotronics NQF level 5 qualification.

Qualifying learners can diagnose and repair petrol and diesel engine management systems on automobiles.

LEARNING ASSUMED TO BE IN PLACE AND RECOGNITION OF PRIOR LEARNING

This unit standard is designed as part of a progression.

The credits allocated to this unit standard assume that the learner is competent on the relevant unit standards at the lower level.

UNIT STANDARD RANGE

The scope and level of this unit standard is determined by the ranges as indicated under specific outcomes.

The learner should be able to work autonomously.

Specific Outcomes and Assessment Criteria:

SPECIFIC OUTCOME 1

Discuss and explain the operation of an engine management system

OUTCOME RANGE

Engine management systems include electronic concentrated control system (ECCS), electronic engine control system (EEC).

ASSESSMENT CRITERIA

ASSESSMENT CRITERION 1

Results achieved:

1. Engine management system circuits, diagrams and related components functions and operation are understood.
2. Serviced components are replaced/adjusted and meet specifications.
3. All defective components are marked, removed and reported.
4. Engine management system functions to specifications.
5. Relevant documentation is correctly filled in.

Indicators:

1. Appropriate components are chosen.
2. Appropriate voltage sources are chosen when servicing.
3. Test equipment is selected and used correctly.
4. Safe working practices are adhered to while carrying out activities.
5. Appropriate fault finding and diagnostic procedures are used.
6. Manufacturer's specifications are adhered to.
7. Problems are located and rectified.
8. Self diagnostic codes are interpreted.

Understanding confirmed:

Respond to "what if" and "why" questions covering
1. Engine management systems
2. Input/output sensors
3. Control feed back loop
4. Selection and use of components
5. Diagnosis and testing of engine management systems
6. Relevant safety practices and procedures
7. Manufacturer's specification manuals

SPECIFIC OUTCOME 2

Discuss & explain the function of petrol & diesel engine management related input & output devices

OUTCOME NOTES

Discuss and explain the function of petrol and diesel engine management related input and output devices.

OUTCOME RANGE

Petrol input devices include air conditioning compressor switch, air mass sensor, engine speed sensor, engine temperature sensor, throttle valve angle sensor, air intake sensor, lambda, park/neutral/clutch switch, ignition switch, knock sensor and knock control unit, MAT sensor, MAP sensor.

Petrol output devices include fuel injectors, air-conditioning circuit relay (idle, on/off), fuel pump, solenoid valve (fuel pressure, emission control), fuel pump resistor/relay, electronic spark timing, ignition coil, radiator fan.

Diesel input devices include needle lift sensor (injector), engine speed, air mass meter, altitude sensor, coolant temperature sensor, intake manifold sensor, accelerator pedal sensor, brake pedal switch, clutch pedal switch, fuel temperature sender, modulating piston movement sensor, diagnostic connection, air conditioner compressor switch.

Diesel output devices include injectors, diesel pump (quantity adjuster and fuel cut off), exhaust gas recirculation valve, solenoid valve for boost pressure control, glow plugs, glow plug warning lamp, air conditioner on/off switch.

ASSESSMENT CRITERIA

ASSESSMENT CRITERION 1

SPECIFIC OUTCOME 3

Identify and select engine management system components

ASSESSMENT CRITERIA

ASSESSMENT CRITERION 1

SPECIFIC OUTCOME 4

Diagnose and test engine management systems and related components

OUTCOME NOTES

Use appropriate measuring equipment

Use diagnostic procedures

Use manufacturer specific manuals

OUTCOME RANGE

Test equipment includes digital code checker, multi meter, test lamps oscilloscope, pressure gauge, vacuum pump, fuel flow meter.

Basic faults include hard starting, rough idle, runs rough, poor acceleration.

Diagnosing includes analysing/interpretation of diagnosing codes on the ECU and clearing thereof.

ASSESSMENT CRITERIA

ASSESSMENT CRITERION 1

SPECIFIC OUTCOME 5

Apply the relevant system safety and servicing precautions

OUTCOME NOTES

Apply the relevant system safety and servicing precautions when repairing and making adjustments to engine management systems.

OUTCOME RANGE

Servicing precautions as specified in the manufacturer's servicing manual.

ASSESSMENT CRITERIA

ASSESSMENT CRITERION 1

SPECIFIC OUTCOME 6

Discuss and report incidents and problems related to engine management systems

OUTCOME NOTES

Discuss and report incidents and problems related to engine management systems and complete fault finding reports and requisition forms.

ASSESSMENT CRITERIA

ASSESSMENT CRITERION 1

UNIT STANDARD ACCREDITATION AND MODERATION OPTIONS

My assessment will be governed by the policies and guidelines of the MERSETA Education and Training Quality Assurer who has jurisdiction over this field of learning. My assessor will (at the very least) be accredited and have a technical qualification in this learning area.

I can be assessed in the language of my choice although if I have to report incidents or conditions to someone else, I will be assessed on my ability to report in the language commonly used in my working environment.

I will be assessed in the workplace but I can submit documents, projects, test results and assignments that were not produced in the workplace.

I can be assessed against this unit standard to obtain credits or as part of an integrated assessment for a qualification.

UNIT STANDARD ESSENTIAL EMBEDDED KNOWLEDGE

1. Names and functions of:

Input sensors

Output sensors

Electronic control unit

Feed back loop control

Sub-systems (glow plug, emission control, injection control, boost pressure control)
2. Purpose of:

Electronic control unit

Input and output sensors

Testing of circuits and components

Applying electronic safety

Diagnosing fault conditions

Exhaust gas recirculation
3. Attributes, descriptions, characteristics and properties:

Engine management systems

Electronic control units

Electronic test equipment

Fuel metering

Injector pumps

Combustion diesel engines
4. Sensory cues:

Use of senses to detect faulty component in a circuit

Use of sight to read circuit diagrams and test equipment
5. Causes and effects, implications of:

Causes of damage and injury

Implications of using incorrect source voltages

Implications incorrect testing applications

Implications of incorrect component selection

Implications of not observing manufacturer's specifications
6. Procedures and techniques:

Safety procedures

Fault finding procedures for components and engine management systems

Diagnostic techniques for fault location (codes)

Repairing procedures
7. Regulations, legislation, agreements, policies, standards:

Relevant manufacturer's standards

Applicable safety, health and environmental legislation
8. Theory: rules, principles laws:

Control system

Air system

Fuel system

Electronic control unit

Communication medium

Other related topics
9. Relationships, systems:

Relationship between engine management system electronic ignition system

Relationship between engine management system and electronic control unit

Relationship between engine management system and other related sub-systems

Critical Cross-field Outcomes (CCFO):

UNIT STANDARD CCFO IDENTIFYING

Identify and solve problems:

Recognise situations that require action and correct when necessary

UNIT STANDARD CCFO WORKING

Work effectively with others:

When diagnosing and repairing engine management systems

UNIT STANDARD CCFO ORGANISING

Organise and manage myself and my activities:

Apply the correct procedures for using, storing and looking after equipment, tools, test equipment, circuit diagrams and components

UNIT STANDARD CCFO COMMUNICATING

Communicate effectively:

Use common names for components

Use common names for test equipment

Use common names for engine management system components

Fill in and use fault reports and requisition forms

UNIT STANDARD CCFO SCIENCE

Use science and technology:

Use and apply scientific principles to engine management systems

UNIT STANDARD CCFO DEMONSTRATING

Demonstrate and understand of the world as a set of related systems:

Relate the use of engine management systems on an automobile and those of other engine management systems

REREGISTRATION HISTORY

As per the SAQA Board decision/s at that time, this unit standard was Reregistered in 2012; 2015.

QUALIFICATIONS UTILISING THIS UNIT STANDARD:

	ID	QUALIFICATION TITLE	PRE-2009 NQF LEVEL	NQF LEVEL	STATUS	END DATE	PRIMARY OR DELEGATED QA FUNCTIONARY
Core	78526	National Certificate: Automotive Repair and Maintenance	Level 5	Level TBA: Pre-2009 was L5	Passed the End Date - Status was "Reregistered"	2023-06-30	As per Learning Programmes recorded against this Qual
Core	22861	National Certificate: Autotronics	Level 5	Level TBA: Pre-2009 was L5	Passed the End Date - Status was "Reregistered"	2012-06-30	MERSETA
Core	57450	National Diploma: Automotive Diagnostics and Repair	Level 5	Level TBA: Pre-2009 was L5	Passed the End Date - Status was "Registered"	2009-02-18	Was MERSETA until Last Date for Achievement
Elective	58539	Further Education and Training Certificate: Automotive Repair and Maintenance	Level 4	NQF Level 04	Passed the End Date - Status was "Registered"	2009-02-18	Was MERSETA until Last Date for Achievement
Elective	78525	Further Education and Training Certificate: Automotive Repair and Maintenance	Level 4	NQF Level 04	Passed the End Date - Status was "Reregistered"	2023-06-30	As per Learning Programmes recorded against this Qual

PROVIDERS CURRENTLY ACCREDITED TO OFFER THIS UNIT STANDARD:

This information shows the current accreditations (i.e. those not past their accreditation end dates), and is the most complete record available to SAQA as of today. Some Primary or Delegated Quality Assurance Functionaries have a lag in their recording systems for provider accreditation, in turn leading to a lag in notifying SAQA of all the providers that they have accredited to offer qualifications and unit standards, as well as any extensions to accreditation end dates. The relevant Primary or Delegated Quality Assurance Functionary should be notified if a record appears to be missing from here.

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