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ASE Certification Task Code List
AAIA Tech Training Resource

ASE has assigned a list of tasks it considers basic to any vehicle repair. These tasks are the basis of the ASE certification program.

This page provides a list of the ASE Task Codes that are addressed in CAAT training programs. Take a look through the list for the areas where you feel you need work, and then find the courses that cover those tasks. In that way, you can direct your educational goals toward your specific needs.

Al — Automobile: Engine Repair

A1A Automobile: General Engine Diagnosis
A1B Automobile: Cylinder Head & Valve Train Diagnosis & Repair
A1C Automobile: Engine Block Diagnosis and Repair
A1D Automobile: Lubrication and Cooling Systems Diagnosis and Repair
A1E Automobile: Fuel, Electrical, Ignition, and Exhaust Systems Inspection and Service

A2 — Automobile: Automatic Transmission/Transaxle

A2A Automobile: General Transmission/Transaxle Diagnosis
A2B Automobile: Transmission/Transaxle Maintenance and Adjustment
A2C Automobile: In-Vehicle Transmission/Transaxle Repair
A3D Automobile: Off-Vehicle Transmission/Transaxle Repair

A3 — Automobile: Manual Drive Train and Axles

A3A Automobile: Clutch Diagnosis and Repair
A3B Automobile: Transmission Diagnosis and Repair
A3C Automobile: Transaxle Diagnosis and Repair
A3D Automobile: Drive (Half) Shaft and Universal Joint/Constant Velocity (CV) Joint Diagnosis and Repair (Front and Rear Wheel Drive)
A3E Automobile: Rear Axle Diagnosis and Repair
A3F Automobile: Four-Wheel Drive Component Diagnosis and Repair

A4 — Automobile: Suspension and Steering

A4A Automobile: Steering Systems Diagnosis and Repair
A4B Automobile: Suspension Systems Diagnosis and Repair
A4C Automobile: Wheel Alignment Diagnosis, Adjustment, and Repair
A4D Automobile: Wheel and Tire Diagnosis and Repair

A5 — Automobile: Brakes

A5A Automobile: Hydraulic System Diagnosis and Repair
A5B Automobile: Drum Brake Diagnosis and Repair
A5C Automobile: Disc Brake Diagnosis and Repair
A5D Automobile: Power Assist Units Diagnosis and Repair
A5E Automobile: Miscellaneous Diagnosis and Repair
A5F Automobile: Antilock Brake System Diagnosis and Repair

A6 — Automobile: Electrical/Electronic Systems

A6A Automobile: General Electrical/Electronic System Diagnosis
A6B Automobile: Battery Diagnosis and Service
A6C Automobile: Starting System Diagnosis and Repair
A6D Automobile: Charging System Diagnosis and Repair
A6E Automobile: Lighting Systems Diagnosis and Repair
A6F Automobile: Gauges, Warning Devices, and Driver Information Systems Diagnosis and Repair
A6G Automobile: Horn and Wiper/Washer Diagnosis and Repair
A6H Automobile: Accessories Diagnosis and Repair

A7 — Automobile: Heating and Air Conditioning

A7A Automobile: A/C System Diagnosis and Repair
A7B Automobile: Refrigeration System Component Diagnosis and Repair
A7C Automobile: Heating and Engine Cooling Systems Diagnosis and Repair
A7D Automobile: Operating Systems and Related Controls Diagnosis and Repair
A7E Automobile: Refrigerant Recovery, Recycling, and Handling

A8 — Automobile: Engine Performance

A8A Automobile: General Engine Diagnosis
A8B Automobile: Ignition System Diagnosis and Repair
ASC Automobile: Fuel, Air Induction, and Exhaust Systems Diagnosis and Repair
A8D Automobile: Emissions Control Systems Diagnosis and Repair
A8E Automobile: Computerized Engine Controls Diagnosis and Repair
A8F Automobile: Engine Electrical Systems Diagnosis and Repair

Fl — Alternate Fuels: Light Vehicle Compressed Natural Gas

F1A Alternate Fuels: Vehicle Conversion Compatibility Analysis
F1B Alternate Fuels: Conversion Parts Fabrication
F1C Alternate Fuels: Conversion Equipment Installation
F1D Alternate Fuels: Leak Testing and Repairs
F1E Alternate Fuels: Conversion Initial Adjustments and Performance Verification
F1F Alternate Fuels: In-Service system Diagnosis and Repair
F1G Alternate Fuels: Cylinder Safety

X1 — X1 Specialty: Exhaust Systems

X1A Specialty: Exhaust System Inspection and Repair
X1B Specialty: Emissions Systems Diagnosis
X1C Specialty: Exhaust System Fabrication
X1D Specialty: Exhaust System Installation
X1E Specialty: Exhaust System Repair Regulations

L1 — Advanced Engine Performance Specialist

L1A Advanced Engine Performance: General Powertrain Diagnosis
L1B Advanced Engine Performance: Computerized Powertrain Controls Diagnosis (Including OBD LI)
L1C Advanced Engine Performance: Ignition System Diagnosis
L1D Advanced Engine Performance: Fuel Systems and Air Induction Systems Diagnosis
L1E Advanced Engine Performance: Emission Control Systems Diagnosis
L1F Advanced Engine Performance: I/M Failure Diagnosis

L2 — Medium/Heavy Vehicle Electronic
Diesel Engine Diagnosis Specialist

L2A Advanced Medium/Heavy Vehicle Electronic Diesel Engine Diagnosis: General Diesel Engine Diagnosis
L2B Advanced Medium/Heavy Vehicle Electronic Diesel Engine Diagnosis: Electronic Diesel Engine Control Diagnosis
L2C Advanced Medium/Heavy Vehicle Electronic Diesel Engine Diagnosis: Diesel Engine Air Induction and Exhaust Diagnosis
L2D Advanced Medium/Heavy Vehicle Electronic Diesel Engine Diagnosis: Diesel Fuel Systems Diagnosis
L2E Advanced Medium/Heavy Vehicle Electronic Diesel Engine Diagnosis: Specific Fuel Systems Diagnosis

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