L1: Advanced Engine Performance Specialist
The purpose of the L1 test is to evaluate your knowledge of diagnosing powertrain driveability problems and emission failures on electronically controlled systems.
The ASE insignia signifies the competence of automotive technicians to customers and gives them piece of mind to know that their vehicle is in good hands. It is literally like wearing your abilities and skills on your sleeve. The only way to obtain this recognition is through ASE testing and certification. Completing the A Series certification process and obtaining Master Automotive Technician status (A1-A8) is a great accomplishment.
The next step is gaining L1 certification, which is an even greater achievement. With today’s strict vehicle emission standards, L1 certification is becoming more important, especially in states where inspection/maintenance (IM) and enhanced I/M (ASM or IM240) and OBD testing programs are required. This program takes the A8 Engine Performance certification to a higher degree. With L1 certification you will be able to diagnose and repair the most complex engine performance and emissions problems with confidence and gain more respect from your peers, your boss and customers.
   ASE Spring Certification Testing: in 86 days, 3 hours, 0 minutes, 19 seconds |
Take the quizzes to find out if you are ready to ace the L1.You are expected to be certified in A8 engine performance and have skill diagnosing problems or failures in the following areas: |
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Diagnosing a power train drivability or emission problem requires the knowledge of several vehicle systems including: engine mechanical, ignition, fuel injection, emission controls and transmission. This quiz covers the diagnostic path and thought process and explains the steps that must be taken, a review of the electrical system, common problems, testing procedures and exhaust gas analyzers. |
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This quiz covers the operation and diagnosis of computerized powertrain control systems and introduces you to the Composite Vehicle Type 3. This quiz covers SFI operation and component functions, OBDII system operation, OBDII system diagnostics, common symptoms and test procedures of the various systems and immobilizer anti-theft system diagnosis. |
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This quiz covers the different types of ignition systems and explains how to test, repair and replace the different components of the ignition system. IT covers common symptoms and probable causes, recommended testing procedures and equipment, secondary circuit diagnosis and repair and spark plug and ignition cable service. |
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Covers common symptoms, tests and repair of the different subsystems of the fuel system and air induction system. It covers fuel quality, fuel pump and pressure controls, fuel injection control systems, fuel injector service, throttle body fuel injection, electronic throttle control systems, air induction system and air intake system service. |
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Engine performance and emissions problems are often a result of emission control system failures and due to regulations, increasing pressure is being placed on technicians to maintain and repair this system. This quiz covers failures and testing of the PCV system, EVAP system, intake air temperature controls, throttle body warmer, idle speed controls, deceleration emission controls, ignition timing control, secondary air injection systems. |
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This quiz covers the topic of emission control systems and failures with much more detail. It begins with a thorough explanation of inspection and maintenance programs and tail pipe tests. It also covers the chemistry of combustion, operating conditions, air-fuel ratios and common combustion problems, five-gas analysis, diagnosis of emission test failures, functional testing and I/M OBD diagnosis. |
