ASE A9 Light Vehicle Diesel Engines case studies
ASE A9 Light Vehicle Diesel Engines · Put your knowledge to work in context.
The ASE A9 Light Vehicle Diesel Engines credential is one of the specialty tests in the ASE automobile certification series. It is aimed at technicians who diagnose, service, and repair diesel-powered light trucks, vans, and passenger vehicles, and who want an independent, industry-recognized way to demonstrate that competence to employers and customers. The exam samples knowledge across seven content areas: general diesel engine diagnosis; cylinder head, valve train, and block assembly; lubrication and cooling systems; air induction, exhaust, and turbocharger systems; diesel fuel injection and management systems; starting, charging, and electrical/electronic systems; and emissions control and aftertreatment systems. Questions are written in a multiple-choice format and typically test practical judgment as much as recall, so many items describe a complaint or a measurement and ask for the most likely cause or the next diagnostic step. The ASE A9 Light Vehicle Diesel Engines case studies are 5 cases and about 2,345 words.
1Intermittent No-Start on a 2016 Cummins ISB
A 2016 Cummins ISB 6.7L in a Ram 2500 cranks but will not start intermittently. The customer reports it happens mostly after the truck sits overnight in damp weather.
507 words, about 3 min2Low Power and Black Smoke on a 2012 Duramax
A 2012 Duramax 6.6L LML in a Silverado 3500 has low power and excessive black smoke under load. The customer states the problem started gradually over the last month.
449 words, about 2 min3Coolant Loss and White Smoke on a 2014 Power Stroke
A 2014 Ford 6.7L Power Stroke has been losing coolant with no visible external leaks. The customer reports white smoke from the exhaust, especially after a cold start, and a sweet smell.
471 words, about 2 min4Hard Start and Rough Idle on a 2010 TDI
A 2010 Volkswagen Jetta TDI with a 2.0L common-rail diesel has a hard start when cold and a rough idle. The engine cranks for 5-7 seconds before starting, and then idles with a noticeable shake.
476 words, about 2 min5Excessive DPF Regeneration on a 2013 Sprinter
A 2013 Mercedes-Benz Sprinter with a 3.0L V6 diesel has frequent DPF regenerations, occurring every 150 miles instead of the normal 300-500 miles. The customer reports reduced fuel economy and a slight loss of power.
442 words, about 2 min