Maintain, repair, inspect, and/or replace brakes, steering mechanisms, springs, air bags, lights, air conditioners, water, fuel, oil, air filters, coolant and chemicals, transmissions, tire air pressure, tire tread, tires, chassis, drive lines, u-joints, air tanks, batteries, air lines, power cords, wipers, mirrors, drive train components, or other equipment as necessary. ASE Certification T2 Diesel Engines T3 Drive Train T4 Brakes T5 Suspension & Steering T6 Electrical/Electrical Systems T7 Heating, Ventilation & Air Conditioning (HVAC) T8 Preventative Maintenance Inspection ASE Master Technician L2 Electronic Diesel Engine Diagnostics.