The nine tests, at a glance

The ASE A1 Engine Repair test covers gasoline engine diagnosis and mechanical repair, from noise, leak and compression testing to cylinder head, valve train, block, lubrication and cooling work. It is taken by technicians who diagnose and rebuild engines, and it is one of the tests required for ASE Master Automobile Technician status.

The ASE A2 Automatic Transmission/Transaxle test covers diagnosing and servicing automatic units, including torque converter, dual-clutch and CVT designs, from road tests and pressure checks to in-vehicle repair and overhaul. It is taken by transmission and drivetrain technicians and counts toward ASE Master Automobile Technician status.

The ASE A3 Manual Drive Train & Axles test covers clutches, manual transmissions and transaxles, drive and half shafts, drive axles and differentials, and four-wheel/all-wheel drive systems. It is taken by technicians who service driveline components and counts toward ASE Master Automobile Technician status.

The ASE A4 Suspension & Steering test covers steering columns, gears and linkage, front and rear suspension, wheel alignment, and wheel and tire service including TPMS. It is taken by technicians who handle chassis and alignment work and counts toward ASE Master Automobile Technician status.

The ASE A5 Brakes test covers hydraulic systems, power assist and parking brakes, drum and disc brake service, and electronic brake controls such as ABS, traction control and stability control. It is taken by technicians who diagnose and repair brake systems and counts toward ASE Master Automobile Technician status.

The ASE A6 Electrical/Electronic Systems test covers circuit diagnosis with meters, scan tools and wiring diagrams, plus batteries, starting, charging, lighting and body electrical systems. It is taken by technicians who track down electrical faults and counts toward ASE Master Automobile Technician status.

The ASE A7 Heating & Air Conditioning test covers HVAC and engine cooling diagnosis, refrigerant handling, refrigeration system components, and electrical, vacuum and automatic climate controls. It is taken by technicians who service climate control systems and counts toward ASE Master Automobile Technician status. Note that A7 does not by itself meet EPA Section 609 refrigerant requirements.

The ASE A8 Engine Performance test covers driveability and emissions diagnosis: engine testing, ignition, fuel, air induction and exhaust, emissions controls, and computerized engine controls with OBD II. It is taken by technicians who diagnose drivability concerns and counts toward ASE Master Automobile Technician status.

The ASE G1 Auto Maintenance and Light Repair test covers routine service and inspection across the whole vehicle: engine systems, transmissions and drivelines, suspension and steering, brakes, electrical and HVAC. It is taken by technicians who handle maintenance and light repair work, such as fluid, brake, tire and battery service.