ITI Mechanic Auto Electrical & Electronics (AITT Theory) study plan
ITI Mechanic Auto Electrical & Electronics (AITT Theory) · Give each week a clear focus.
8 weeks · About 7 hours per week
Basic Electricity, Magnetism and Electrical Units & Batteries, Charging Systems and Starting Systems
Define voltage, current, resistance, power and energy, and state the SI unit and symbol for each without notes
Apply Ohm's law and the power equation to at least 15 worked numericals covering series and parallel resistor networks
Explain the magnetic effects of current and state Faraday's and Lenz's laws in one sentence each
List the constructional parts of a lead-acid starter battery and state the function of each plate, separator and electrolyte component
Compare flooded, EFB and AGM batteries on cycling ability and typical application, and state the correct charging voltage window for each
Your checkpoint
A one-page formula and unit sheet plus 15 solved Ohm's law/power numericals with answers checked against a second method
Batteries, Charging Systems and Starting Systems & Basic Electricity, Magnetism and Electrical Units
Describe the three charging stages of an alternator regulator and explain how field current is controlled to hold the set point
Trace the complete cranking circuit from battery positive through ignition switch, relay, solenoid and starter motor back to earth, labelling every terminal
Test a battery with a hydrometer and a conductance tester and interpret state of charge versus state of health results
Diagnose a no-charge fault by measuring voltage drop across the alternator output circuit and belt drive
Explain the difference between a pre-engaged and a permanent-magnet reduction starter and when each is used
Your checkpoint
A hand-drawn charging and starting circuit schematic with expected voltage readings annotated at six test points under three fault conditions
Wiring, Cables, Connectors, Fuses and Circuit Protection & Trade Safety, Tools, Measuring Instruments and Workshop Practice
Select cable gauge for a given load current and volt drop budget using a cable sizing table, showing the calculation
Identify the correct fuse rating and type for five stated circuits and justify each choice by continuous current and inrush
Describe the correct procedure for crimping, soldering and heat-shrinking an automotive connector, and list three causes of high-resistance joints
Demonstrate safe use of a digital multimeter, clamp meter and insulation tester, stating the category rating needed for EV work
List the personal protective equipment and isolation steps required before working on a vehicle electrical system
Your checkpoint
A cable and fuse selection worksheet for five circuits, each with calculated current, chosen gauge, chosen fuse and volt drop figure
Ignition Systems and Engine Management Sensors/Actuators & Electronic Components, Semiconductors and Basic Electronic Circuits
Explain the operation of a coil-on-plug ignition system and state the function of the igniter, condenser and suppression resistor
Interpret a secondary ignition waveform, naming the firing line, burn time and coil oscillation regions
Describe how a Hall-effect and an inductive crankshaft sensor differ in output signal and testing method
Identify the function of a diode, transistor, thyristor and Zener diode in automotive circuits with one example each
Calculate the output of a simple potential divider and a bridge rectifier given stated input values
Your checkpoint
A sensor and ignition component fault table listing ten components, their expected signal, a test method and a pass criterion
Lighting, Horn, Wiper, Indicators and Body Electrical Accessories & Electronic Control Units, Multiplexing/CAN Bus and Vehicle Networks
Trace the lighting circuit of headlamp, tail, brake and reverse lamps, and explain how a relay and a body control module each switch them
Diagnose a flashing-rate fault on an indicator circuit and explain the role of the flasher unit or BCM duty cycle
Describe the operation of a wiper motor park switch and an intermittent wiper control
Explain CAN bus topology, termination resistance and the difference between CAN high and CAN low voltage levels in dominant and recessive states
List the steps to check a CAN network for a short to earth, short to power and open circuit using a multimeter
Your checkpoint
A body electrical wiring diagram redrawn from memory with a CAN bus section showing expected resistance and voltage measurements at three nodes
Electronic Control Units, Multiplexing/CAN Bus and Vehicle Networks & Diagnostic Equipment, Fault Finding and Testing Procedures
Describe the inputs, outputs and power supply pins of an ECU and explain how a reference voltage is used for sensor supply
Interpret a diagnostic trouble code freeze-frame and explain how to convert it into a test sequence
Perform a parasitic drain test and state the acceptable limit and the steps to isolate the offending circuit
Use a scan tool to read live data and compare two sensor readings for plausibility
Explain the difference between a code-reader and a manufacturer-level scan tool in bus access and actuator testing
Your checkpoint
A written diagnostic case study of one simulated no-start fault, showing symptom, code, measurements, root cause and repair verification
Hybrid and Electric Vehicle Electrical Systems and High-Voltage Safety & Diagnostic Equipment, Fault Finding and Testing Procedures
State the voltage classes used in electric vehicles and identify which circuits are classed as high voltage
List the personal protective equipment, isolation procedure and lockout steps required before high-voltage work
Describe the construction and function of the traction battery pack, service disconnect, contactors and pre-charge circuit
Explain how an insulation monitoring device detects a loss of isolation and how to measure isolation resistance
Describe the safety precautions for a high-voltage battery fire or a damaged vehicle after a collision
Your checkpoint
A high-voltage safety checklist covering isolation, PPE, verification of zero energy and re-energisation, written in the order it would be performed
Trade Safety, Tools, Measuring Instruments and Workshop Practice & Basic Electricity, Magnetism and Electrical Units & Batteries, Charging Systems and Starting Systems & Wiring, Cables, Connectors, Fuses and Circuit Protection & Ignition Systems and Engine Management Sensors/Actuators & Lighting, Horn, Wiper, Indicators and Body Electrical Accessories & Electronic Components, Semiconductors and Basic Electronic Circuits & Electronic Control Units, Multiplexing/CAN Bus and Vehicle Networks & Diagnostic Equipment, Fault Finding and Testing Procedures & Hybrid and Electric Vehicle Electrical Systems and High-Voltage Safety
Revise all ten domains using the earlier deliverables and close every gap marked as weak
Complete a full-length timed mock test under exam conditions and score it
Analyse every wrong answer and write the correct reasoning in one line each
Re-derive the key formulas and unit conversions from memory without reference
Rehearse safety and measuring instrument questions until every answer is automatic
Your checkpoint
A scored mock test result with a written error log listing each weak topic and the corrective action taken
Milestones
Week 2: Score at least 80% on a self-made 25-question quiz on basic electricity, batteries, charging and starting, with all circuit-tracing answers correct
Week 4: Explain ignition waveform regions and sensor testing methods aloud in under five minutes each without notes, and correctly size cable and fuse for three new circuits
Week 6: Correctly diagnose two of three simulated electrical faults within 20 minutes each using a structured test sequence and a scan tool
Week 8: Achieve at least 75% on the full-length timed mock test with no safety question answered incorrectly