Lesson 1Exhaust and emissions control: manifold, catalytic converter, oxygen sensors inspectionThis section covers inspection of exhaust and emissions components, including manifolds, catalytic converters, and oxygen sensors. You will learn to spot leaks, overheating, internal damage, and sensor faults affecting performance in dusty environments.
Checking manifolds for leaks and cracksHeat shield, hanger, and joint inspectionCatalytic converter temperature and rattle checksOxygen sensor visual and wiring inspectionUsing scan data for O2 and catalyst testsIdentifying exhaust restrictions and backpressureLesson 2Battery and charging system: state-of-charge, load test, terminals and alternator outputThis section details preventive checks for the battery and charging system. You will learn state-of-charge testing, load testing, terminal service, and alternator output checks to prevent no-starts and electrical failures in tropical heat.
Open-circuit voltage and SOC assessmentBattery load testing and rating selectionTerminal cleaning and corrosion preventionChecking cable routing and ground pointsAlternator output and ripple testingParasitic draw checks during diagnosisLesson 3Air filter, fuel filter, cabin filter inspection and replacement criteriaThis section explains inspection and replacement criteria for air, fuel, and cabin filters. You will learn how restriction affects performance, how to assess contamination, and how to follow service intervals for different operating conditions.
Engine air filter restriction and damage checksFuel filter clogging symptoms and serviceCabin filter access, removal, and inspectionChoosing correct filter types and ratingsService intervals for severe duty useDocumenting filter changes on service logsLesson 4Drive belts, accessory belt tensioners, pulleys inspection and replacement triggersThis section explains inspection of drive belts, accessory belt tensioners, and pulleys. You will learn how to identify wear, noise sources, and failure risks, and determine when preventive replacement is justified under local usage.
Identifying belt cracks, glazing, and frayingMeasuring belt wear with gauge toolsManual and automatic tensioner checksPulley alignment, wobble, and noise testsReplacing belts without damaging componentsPost-replacement recheck and noise diagnosisLesson 5Ignition system: spark plug inspection/replacement, ignition coils and lead checksHere you will study preventive checks for the ignition system, including spark plugs, coils, and leads. You will learn inspection, testing, and replacement criteria to prevent misfires, hard starts, and poor fuel economy.
Spark plug removal and condition readingGap measurement and correct torqueCoil primary and secondary testsInspecting leads, boots, and routingCommon ignition-related drivability symptomsRecommended replacement intervals and partsLesson 6Tyres, wheel bearings, alignment, and suspension (shocks, springs, bushings) inspection proceduresHere you will study inspection procedures for tyres, wheel bearings, alignment, and suspension components such as shocks, struts, springs, and bushings. Focus is on safety, tyre wear patterns, and ride and handling issues on rough roads.
Tire tread depth, wear pattern, and ageChecking tire pressures and load ratingsWheel bearing play, noise, and seal checksVisual inspection of shocks and strutsSpring, bushing, and joint wear checksBasic alignment indicators and road testLesson 7Brake system: pads, rotors, calipers, lines, parking brake, ABS sensor checksThis section explains systematic brake inspections, including pads, rotors, calipers, hydraulic lines, parking brake, and ABS sensors. It focuses on wear limits, test methods, common faults, and safe service practices.
Measuring pad thickness and wear patternsRotor runout, thickness, and surface checksCaliper slide, piston, and seal inspectionBrake hose, hard line, and leak inspectionParking brake travel and holding testsABS sensor, wiring, and tone ring checksLesson 8Engine oil and oil filter: checking level, contamination, correct spec and change criteriaThis section covers engine oil and filter maintenance, including level checks, contamination signs, viscosity and specification verification, and change criteria based on mileage, time, and operating conditions in Gambia.
Checking oil level, color, and odorIdentifying fuel, coolant, or metal contaminationSelecting correct oil grade and specificationOil filter type, fitment, and bypass functionService intervals and severe duty factorsResetting maintenance reminders correctlyLesson 9Lighting, wipers, seals, and body corrosion inspection checklistYou will learn how to inspect exterior and interior lighting, wiper systems, weather seals, and body corrosion. The section emphasises visibility, water intrusion prevention, and early rust detection to preserve safety and value in humid areas.
Headlamp, brake, and signal lamp testsLens condition, aim, and beam pattern checksWiper blade, arm, and washer operationDoor, trunk, and glass weather seal checksUnderbody and wheel arch rust inspectionRust treatment and protection strategiesLesson 10Cooling system: coolant level, condition, hoses, thermostat, water pump checksYou will learn how to evaluate coolant level, mixture, and condition, and inspect hoses, thermostat, radiator, and water pump. The section stresses leak detection, overheating prevention, and correct coolant service procedures in hot weather.
Coolant level, mixture, and test toolsPressure testing radiator, cap, and hosesThermostat opening tests and failure signsWater pump bearing, seal, and noise checksInspecting heater core and bypass hosesFlushing and refilling with correct coolantLesson 11Fluids: transmission/gearbox, brake fluid, power steering/EPAS, differential; sampling and replacement intervalsHere you will learn how to inspect, sample, and replace key automotive fluids, including transmission, brake, power steering or EPAS, and differential oils. Emphasis is on intervals, contamination signs, and correct fluid specifications for local use.
Identifying correct OEM fluid specificationsTransmission fluid level, color, and odor checkBrake fluid moisture testing and flushing stepsPower steering and EPAS fluid inspectionsDifferential and final drive oil serviceRecording fluid changes and service history
