Avería intermitente en red multiplexada

A 90-minute, 4-round basic Express simulation for Spanish vocational training (Formacion Profesional), module 0457 Circuitos electricos auxiliares del vehiculo of the Tecnico en Electromecanica de Vehiculos Automoviles (Real Decreto 453/2010), with a grado superior cut on module 0291 Sistemas electricos y de seguridad y confortabilidad of the Tecnico Superior en Automocion (Real Decreto 1796/2008).

The learner is Lorea Iguzquiza, a newly qualified electrical diagnosis technician at a fictional independent auto-electrics workshop, Electroauto Irurozqui in Torreandia.

Four situations set the workshop's course in 2027: warning lamps lighting at random with lost-communication codes in several control units, and how the fault is approached and the CAN bus measured; a taxi with intermittent doors and a flat battery every morning, and how the battery drain is found and the decision on the door module taken; an airbag lamp and steering-wheel buttons that fail only when the wheel is turned in the heat, and how the intermittent fault is reproduced and the airbag work done; and the annual review of how the workshop diagnoses and closes each job (Real Decreto 1457/1986: written estimate, replaced parts, invoice, guarantee).

A control unit replaced without measuring rarely cures a wiring fault. Scored on the electrical faults diagnosed right first time, the cost of diagnosis and parts, the days with a fault unresolved and the vehicles back with the same fault; training-level decision practice that complements the module's supervised practical work and each manufacturer's diagrams and procedures, with no vehicle specification given.

Two hard-fails cap the round at 40: fitting a higher-rated or bridged fuse, and measuring the airbag igniter with a multimeter (Real Decreto 989/2015 art. 4.5). Spanish primary, English parity.

An introductory simulation that assumes no prior knowledge of the subject, designed for undergraduate courses. It also works in vocational and high-school programmes and in onboarding sessions.