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 THAT HAS PASSED THE END DATE: 

Diagnose and repair vehicle stability, traction and drive control (VSTDC) systems 
SAQA US ID UNIT STANDARD TITLE
12232  Diagnose and repair vehicle stability, traction and drive control (VSTDC) 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" 		 2005-07-19  2008-07-19  SAQA 0160/05 
LAST DATE FOR ENROLMENT LAST DATE FOR ACHIEVEMENT
2009-07-19   2012-07-19  

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 is replaced by: 
US ID Unit Standard Title Pre-2009 NQF Level NQF Level Credits Replacement Status
376623  Diagnose and repair vehicle stability, traction and drive control (VSTDC) systems  Level 5  Level TBA: Pre-2009 was L5  16   

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 vehicle stability, traction and drive control (VSTDC) systems on an automobile. 

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 vehicle stability, traction and drive control systems 
OUTCOME RANGE 
Vehicle stability, traction and drive control systems include anti locking brake system (ABS), traction control system (ABS/TCS), electronic transmission control (ETC), electronic programme control (EPC). 

ASSESSMENT CRITERIA 

ASSESSMENT CRITERION 1 
Results achieved:

1. VSTDC circuits, diagrams and related components functions and operation are understood
2. VSTDC systems are diagnosed and repaired
3. Serviced components are replace/adjusted and meet specifications
4. All defective components are marked, removed and reported
5. Relevant documentation is completed

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. Manufacturers specifications are adhered to
7. Problems are located and rectified

Understanding confirmed:

Respond to "what if" and "why" questions covering
1. VSTDC systems
2. Vehicle stability, traction and drive control
3. Input/output sensors
4. Control feed back loop
5. Selection and use of components
6. Diagnosis and testing of VSTDC electronic control unit/s and related components
7. Consequences of not apply relevant safety practices and procedures
8. Manufacturer's specification manuals 

SPECIFIC OUTCOME 2 
Discuss and explain the function of stability, traction and drive control related components 
OUTCOME RANGE 
ABS components include wheel speed sensors, ECU, hydraulic pressure modulator with solenoid valves, hydraulic pressure modulator with integrated ECU.

ABS/TSC components include ABS/TSC ECU, Motronic ECU, electronic throttle control ECU, ABS hydraulic pressure modulator, wheel sensors.

ETC components include transmission output shaft speed sensor, engine load/speed selector lever, kick down switch, hydraulic actuators, ECU.

EPC components include YAW sensor, lateral acceleration sensor, steering wheel angle sensor, primary pressure sensor, wheel speed sensors, ESP ECU, hydraulic modulator, engine management ECU, ignition angle, fuel injectors, throttle valve for ETC. 

ASSESSMENT CRITERIA 

ASSESSMENT CRITERION 1 
Results achieved:

1. VSTDC circuits, diagrams and related components functions and operation are understood
2. VSTDC systems are diagnosed and repaired
3. Serviced components are replace/adjusted and meet specifications
4. All defective components are marked, removed and reported
5. Relevant documentation is completed

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. Manufacturers specifications are adhered to
7. Problems are located and rectified

Understanding confirmed:

Respond to "what if" and "why" questions covering
1. VSTDC systems
2. Vehicle stability, traction and drive control
3. Input/output sensors
4. Control feed back loop
5. Selection and use of components
6. Diagnosis and testing of VSTDC electronic control unit/s and related components
7. Consequences of not apply relevant safety practices and procedures
8. Manufacturer's specification manuals 

SPECIFIC OUTCOME 3 
Identify and select vehicle stability, traction and drive control components 

ASSESSMENT CRITERIA 

ASSESSMENT CRITERION 1 
Results achieved:

1. VSTDC circuits, diagrams and related components functions and operation are understood
2. VSTDC systems are diagnosed and repaired
3. Serviced components are replace/adjusted and meet specifications
4. All defective components are marked, removed and reported
5. Relevant documentation is completed

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. Manufacturers specifications are adhered to
7. Problems are located and rectified

Understanding confirmed:

Respond to "what if" and "why" questions covering
1. VSTDC systems
2. Vehicle stability, traction and drive control
3. Input/output sensors
4. Control feed back loop
5. Selection and use of components
6. Diagnosis and testing of VSTDC electronic control unit/s and related components
7. Consequences of not apply relevant safety practices and procedures
8. Manufacturer's specification manuals 

SPECIFIC OUTCOME 4 
Diagnose and repair vehicle stability, traction and drive control related components 
OUTCOME NOTES 
  • Use appropriate measuring equipment
  • Use diagnostic procedures
  • Perform visual checks
  • Use manufacturer specific manuals 
    		•
    OUTCOME RANGE 
    Test equipment includes digital code checker, multi meter, test lamps oscilloscope, product specific diagnostic test equipment.

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

    ASSESSMENT CRITERIA     

    ASSESSMENT CRITERION 1 
    Results achieved:

    1. VSTDC circuits, diagrams and related components functions and operation are understood
    2. VSTDC systems are diagnosed and repaired
    3. Serviced components are replace/adjusted and meet specifications
    4. All defective components are marked, removed and reported
    5. Relevant documentation is completed

    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. Manufacturers specifications are adhered to
    7. Problems are located and rectified

    Understanding confirmed:

    Respond to "what if" and "why" questions covering
    1. VSTDC systems
    2. Vehicle stability, traction and drive control
    3. Input/output sensors
    4. Control feed back loop
    5. Selection and use of components
    6. Diagnosis and testing of VSTDC electronic control unit/s and related components
    7. Consequences of not apply relevant safety practices and procedures
    8. 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 working with vehicle stability, traction and drive control. 
    OUTCOME RANGE 
    Safety includes, work area safety, electrical safety, work area house keeping and vehicle cleanliness.

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

    ASSESSMENT CRITERIA     

    ASSESSMENT CRITERION 1 
    Results achieved:

    1. VSTDC circuits, diagrams and related components functions and operation are understood
    2. VSTDC systems are diagnosed and repaired
    3. Serviced components are replace/adjusted and meet specifications
    4. All defective components are marked, removed and reported
    5. Relevant documentation is completed

    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. Manufacturers specifications are adhered to
    7. Problems are located and rectified

    Understanding confirmed:

    Respond to "what if" and "why" questions covering
    1. VSTDC systems
    2. Vehicle stability, traction and drive control
    3. Input/output sensors
    4. Control feed back loop
    5. Selection and use of components
    6. Diagnosis and testing of VSTDC electronic control unit/s and related components
    7. Consequences of not apply relevant safety practices and procedures
    8. Manufacturer's specification manuals 

    SPECIFIC OUTCOME 6 
    Discuss and explain data transmission between systems 
    OUTCOME RANGE 
    Transmission media include conventional data transmission, serial data transmission (CAN), ECU networking, closed-loop control system and controlled variables. 

    ASSESSMENT CRITERIA     

    ASSESSMENT CRITERION 1 
    Results achieved:

    1. VSTDC circuits, diagrams and related components functions and operation are understood
    2. VSTDC systems are diagnosed and repaired
    3. Serviced components are replace/adjusted and meet specifications
    4. All defective components are marked, removed and reported
    5. Relevant documentation is completed

    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. Manufacturers specifications are adhered to
    7. Problems are located and rectified

    Understanding confirmed:

    Respond to "what if" and "why" questions covering
    1. VSTDC systems
    2. Vehicle stability, traction and drive control
    3. Input/output sensors
    4. Control feed back loop
    5. Selection and use of components
    6. Diagnosis and testing of VSTDC electronic control unit/s and related components
    7. Consequences of not apply relevant safety practices and procedures
    8. Manufacturer's specification manuals 

    SPECIFIC OUTCOME 7 
    Discuss & report incidents & problems related to VSTDC systems & complete fault finding reports 
    OUTCOME NOTES 
    Discuss and report incidents and problems related to VSTDC systems and complete fault finding reports and requisitions. 

    ASSESSMENT CRITERIA     

    ASSESSMENT CRITERION 1 
    Results achieved:

    1. VSTDC circuits, diagrams and related components functions and operation are understood
    2. VSTDC systems are diagnosed and repaired
    3. Serviced components are replace/adjusted and meet specifications
    4. All defective components are marked, removed and reported
    5. Relevant documentation is completed

    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. Manufacturers specifications are adhered to
    7. Problems are located and rectified

    Understanding confirmed:

    Respond to "what if" and "why" questions covering
    1. VSTDC systems
    2. Vehicle stability, traction and drive control
    3. Input/output sensors
    4. Control feed back loop
    5. Selection and use of components
    6. Diagnosis and testing of VSTDC electronic control unit/s and related components
    7. Consequences of not apply relevant safety practices and procedures
    8. 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
  • Actuators
  • Electronic control unit (ABS, TCS, ESP, ETC)
  • Feed back loop control
  • Sub-systems
    2. Purpose of:
  • Electronic control unit/s
  • Input and output sensors
  • Testing of circuits and components
  • Applying electronic safety
  • Diagnosing fault conditions
    3. Attributes, descriptions, characteristics and properties:
  • Electronic control unit/s
  • Electronic test equipment
  • ABS/ETC/ESP/TCS systems
    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
  • Diagnostic techniques for fault location (codes)
  • Repair procedures
    7. Regulations, legislation, agreements, policies, standards:
  • Relevant manufacturer's regulations/standards
  • Applicable safety, health and environmental legislation
    8. Theory: rules, principles laws:
  • ABS Braking system
  • Hydraulic system
  • Accelerator system
  • Electronic control unit
  • Communication medium
  • Networking
  • Tyres, (force, vertical/longitudinal, slip, friction, aquaplaning
  • MSR engine drag control
  • Electronic throttle control
  • Lateral/linear acceleration
  • ETC or EGAS throttle control
    9. Relationships, systems:
  • Relationship between VSTDC system and that of electronic control unit/s 
    		•


    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 VSTDC 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 VSTDC systems and components
  • Fill in and use fault reports and requisition forms 
    		•

    UNIT STANDARD CCFO SCIENCE 
    Use science and technology:
  • Use and apply scientific principles to VSTDC systems 
    		•

    UNIT STANDARD CCFO DEMONSTRATING 
    Demonstrate and understand of the world as a set of related systems:
  • Relate the use of VSTDC on an automobile and that of other related systems 
    		•

    UNIT STANDARD NOTES 
    This unit standard has been replaced by unit standard 376623, which is "Diagnose and repair vehicle stability, traction and drive control (VSTDC) systems", Level 5 , 16 credits. 

    QUALIFICATIONS UTILISING THIS UNIT STANDARD: 
      ID QUALIFICATION TITLE PRE-2009 NQF LEVEL NQF LEVEL STATUS END DATE PRIMARY OR DELEGATED QA FUNCTIONARY
    Core  22861   National Certificate: Autotronics  Level 5  Level TBA: Pre-2009 was L5  Passed the End Date -
    Status was "Reregistered"     		 2012-06-30  MERSETA 
    Elective  64549   Further Education and Training Certificate: Automotive Body Repair  Level 4  NQF Level 04  Passed the End Date -
    Status was "Reregistered"     		 2023-06-30  MERSETA 
    Elective  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 
    Elective  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 


    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.
     
    NONE 


    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.