Cert IV Auto Diagnostic case studies
Cert IV Auto Diagnostic · Put your knowledge to work in context.
The Certificate IV in Automotive Mechanical Diagnosis (AUR40216) is an Australian vocational qualification for technicians who already have trade-level mechanical skills and want to specialise in systematic fault finding rather than routine servicing. It suits experienced light-vehicle mechanics moving into diagnostic roles, workshop foremen who sign off complex repairs, and technicians preparing to work on networked electronic systems, driveline faults and climate control. The Cert IV Auto Diagnostic case studies are 5 cases and about 2,290 words.
1Intermittent No-Start on a 2016 Diesel Ute After Rain
A 2016 2.8 L common-rail diesel ute is towed in with a customer report of three no-starts in the past two weeks, each occurring on wet mornings. On two occasions the engine cranked normally but did not fire; once it fired after 20 seconds of cranking.
500 words, about 3 min2Brake Pedal Pulsing After Rotor Replacement
A 2019 front-wheel-drive SUV returns two weeks after front rotors and pads were replaced, with the owner reporting a pulsing pedal and steering-wheel shudder under braking from 80 km/h. The technician who did the original job measured lateral runout on both front hubs at 0.06 mm and fitted new rotors without checking runout on the vehicle.
457 words, about 2 min3Air Conditioning Not Cooling in High Ambient Temperatures
A 2018 passenger car with automatic climate control blows warm air when ambient is above 30 degrees C but cools acceptably in the morning. The owner reports the fan works and the cabin filter was replaced last service.
458 words, about 2 min4Automatic Transmission Slipping Under Load After Fluid Service
A 2015 rear-wheel-drive ute with a six-speed conventional automatic is brought in after a fluid and filter service at another shop. The owner reports flare on the 2-3 shift when towing and a harsh 4-5 shift when cold.
458 words, about 2 min5Workshop Housekeeping and Documentation Under Pressure
It is Friday afternoon in a busy workshop. A technician is finishing a brake job on a hoist, with used pads, a brake fluid bottle and oily rags on the floor nearby.
417 words, about 2 min