SAQA All qualifications and part qualifications registered on the National Qualifications Framework are public property. Thus the only payment that can be made for them is for service and reproduction. It is illegal to sell this material for profit. If the material is reproduced or quoted, the South African Qualifications Authority (SAQA) should be acknowledged as the source.
SOUTH AFRICAN QUALIFICATIONS AUTHORITY 
REGISTERED UNIT STANDARD: 

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
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 
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 3 
Identify and select engine management system components 

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 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 
    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 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 
    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 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 
    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 


    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  Reregistered  2021-06-30  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  78525   Further Education and Training Certificate: Automotive Repair and Maintenance  Level 4  NQF Level 04  Reregistered  2021-06-30  As per Learning Programmes recorded against this Qual 
    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 


    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.
     
    1. Barloworld South Africa (Pty) Ltd T/A Barloworld-Equipment (ISANDO) (T 
    2. Bell Equipment Company SA (Pty) Ltd (ALTON) (TP) 
    3. Buscor 
    4. Coastal Kzn F.E.T. College - Swinton Road Campus 
    5. DON-DER TRUCK REPAIRS TRUST 
    6. Eastcape Midlands Public FET College - Uitenhage (High Street)Campus 
    7. Ekurhuleni West Public FET College - Germiston Campus 
    8. False Bay Public FET College - Westlake Campus 
    9. Imperial Technical Training Academy (GERMISTON) (TP) 
    10. Imperial Technical Training Academy (WADEVILLE) (TP) 
    11. JMC TECHNICAL TRAINING (Bloemfontein)(TP) 
    12. KwaZulu Automotive Training Services cc (KZN) (DURBAN) (TP) 
    13. McCarthy Academy Cape Town (BLACKHEATH) (TP) 
    14. McCarthy Automotive Artisan Academy (MIDRAND) (TP) 
    15. McCarthy Automotive Artisans Academy (PINETOWN) (TP) 
    16. Mopani South East FET College - Phalaborwa Campus 
    17. Nissan SA (Pty) Ltd (ROSSLYN) (TP) 
    18. PUTCO Pty Ltd 
    19. Qualitas Training cc (SELBY) (TP) 
    20. SG Coal (Pty) Ltd (TP) 
    21. Shukela Training Centre 
    22. St Anthony's Education Centre (BOKSBURG) (TP) 
    23. The Automobile Association of South Africa NPC T/A The AA Technical College(MIDRAND) (TP) 
    24. Toyota Academy Toyota SA Motors (Pty) Ltd (SANDTON) (TP) 
    25. Umfolozi FET College - Mandeni Campus 
    26. Umgungundlovu FET College - Plessislaer Campus 
    27. Volkswagen of South Africa (Pty) Ltd - Technical Learning Academy (UIT 



    All qualifications and part qualifications registered on the National Qualifications Framework are public property. Thus the only payment that can be made for them is for service and reproduction. It is illegal to sell this material for profit. If the material is reproduced or quoted, the South African Qualifications Authority (SAQA) should be acknowledged as the source.