ITI Mechanic Auto Electrical & Electronics (AITT Theory) case studies
ITI Mechanic Auto Electrical & Electronics (AITT Theory) · Put your knowledge to work in context.
The ITI Mechanic Auto Electrical & Electronics trade theory paper, assessed under the AITT (All India Trade Test) scheme for NCVT-affiliated ITIs, is the written theory component of the trade certification for students training to work on vehicle electrical and electronic systems. It suits apprentices and ITI trainees who want a recognised trade qualification before working in automotive service workshops, OEM dealer service centres, fleet maintenance depots, or as self-employed auto electricians. The ITI Mechanic Auto Electrical & Electronics (AITT Theory) case studies are 5 cases and about 4,539 words.
1Flooded EV, Isolation Fault and Out-of-Date Gloves
A 2021 battery-electric hatchback with a 355 V nominal (96-cell) pack is towed in after being parked for two hours in a flooded underground car park; water reached the lower sill. The instrument cluster displays 'Electrical system fault – stop safely' and the workshop scan tool logs P0AA6 (high-voltage system isolation fault).
905 words, about 5 min2Van With a Silent BCM on a Healthy CAN Bus
A 2018 light commercial van (2.0 diesel, 6-speed manual) is brought in with the MIL, ABS and battery lamps on, a dead speedometer and an engine that cranks but does not start. The workshop's scan tool communicates with the engine ECU and the ABS module but reports 'no communication' with the body control module (U0140).
935 words, about 5 min3Two Alternators Later, the Battery Is Still Flat
A 2015 1.6 diesel hatchback comes in with the battery flat every second morning and headlamps that dim at idle and brighten when the engine is revved. The battery is a 12 V, 70 Ah, 640 CCA lead-acid unit, 8 months old, and reads 12.1 V after standing overnight.
843 words, about 4 min4Misfire That Follows the Cylinder, Not the Coil
A 2017 1.4 turbocharged direct-injection petrol car sets P0302 (cylinder 2 misfire); the MIL flashes when the customer climbs a long hill, and there is a noticeable shake at idle. The workshop has already swapped the ignition coil and spark plug from cylinder 2 to cylinder 1, and the misfire stayed on cylinder 2.
903 words, about 5 min50.38 A Drain That Flattens an AGM Battery at the Airport
A 2019 SUV with smart charging and an 80 Ah AGM battery (680 CCA) comes in for the third time: it will not start after standing for two to three days. The battery is 4 months old and passed a capacity test; charging voltage is a steady 14.3 V and the charging circuit has been checked.
953 words, about 5 min