ASE A1 study plan
ASE A1 · Give each week a clear focus.
8 weeks · About 7 hours per week
General Engine Diagnosis
Build a symptom-to-system decision tree that routes no-start, hard-start, stall, and performance complaints to the correct test sequence
Perform and interpret compression, cylinder leak-down, cylinder balance, and manifold vacuum tests on paper-based case scenarios
Separate mechanical root causes from fuel, ignition, and electrical root causes using test results rather than guesses
Practice customer-interview and verification steps for eight written driveability complaints
Your checkpoint
A one-page diagnostic decision tree plus a 40-question Domain 1 quiz scored at 85% or better, with every missed item rewritten as a correct explanatory sentence
General Engine Diagnosis & Cylinder Head and Valve Train Diagnosis and Repair
Identify every cylinder head and valve train component and state its function during each stroke of the four-stroke cycle
Measure and judge valve lash, pushrod straightness, rocker arm wear, and spring free length against a stated specification
Match six distinct upper-engine noises to their most likely causes and the confirming test for each
Explain how to verify a mechanical misfire before condemning ignition or fuel components
Your checkpoint
A noise-to-cause comparison table covering six complaints plus a 30-question mixed Domain 1 and 2 quiz scored at 80% or better
Cylinder Head and Valve Train Diagnosis and Repair
Sequence a cylinder head inspection that covers warpage, crack detection, valve seat concentricity, and guide clearance
Describe valve stem seal replacement and valve spring installed-height measurement step by step
Diagnose timing chain, timing belt, and variable valve timing faults from written symptom sets
State the correct cylinder head bolt torque sequence, torque-to-yield handling, and re-torque rules
Your checkpoint
A written head and valve train repair procedure checklist scored against ten required procedural steps, plus a 35-question Domain 2 quiz at 85% or better
Engine Block Diagnosis and Repair
Interpret block measurements including bore taper, out-of-round, deck flatness, and main bore alignment against service limits
Diagnose piston, ring, and bearing failures by reading written wear-pattern descriptions
Explain crack detection, core plug service, and oil gallery cleaning and verification methods
Assemble a complete root-cause argument for a low oil pressure complaint traced to block and bearing wear
Your checkpoint
A 60-question mid-plan practice exam across Domains 1 through 3 scored at 75% or better, plus a wear-pattern identification sheet covering eight written failure scenarios
Lubrication and Cooling Systems Diagnosis and Repair
Diagnose low oil pressure, oil consumption, and contaminated oil complaints using pressure testing and inspection logic
Explain oil pump, relief valve, and filter bypass operation and the failure mode each produces
Diagnose overheating, over-cooling, coolant loss, and poor heater performance as separate fault families
Test thermostat opening behavior, radiator cap hold pressure, coolant concentration, and system pressure retention
Your checkpoint
Two full diagnostic write-ups, one lubrication and one cooling, each with a numbered test sequence and pass/fail criteria, plus a 30-question Domain 4 quiz at 85% or better
Lubrication and Cooling Systems Diagnosis and Repair & Fuel, Electrical, Ignition, and Exhaust Systems Diagnosis and Repair
Trace circuits on a wiring diagram and specify voltage drop, resistance, and current measurements for each leg
Diagnose ignition misfires using secondary ignition reasoning and scope pattern descriptions
Explain fuel delivery, injector operation, and air/fuel ratio diagnosis in a logical test order
Identify exhaust restriction and emission control faults from backpressure and gas reading evidence
Your checkpoint
A five-scenario circuit diagnosis worksheet with the correct measurement at each step, plus a 35-question mixed Domain 4 and 5 quiz at 80% or better
Fuel, Electrical, Ignition, and Exhaust Systems Diagnosis and Repair & Engine Starting and Charging Systems Diagnosis and Repair
Diagnose undercharge and overcharge conditions using alternator output, diode, and voltage regulator test procedures
Diagnose no-crank and slow-crank complaints with battery, starter, and cable voltage-drop tests
Explain parasitic draw testing, fuse isolation, and acceptable key-off current thresholds
Interpret starter current draw and charging voltage specifications to reach a condenser-free verdict
Your checkpoint
Two finished flowcharts, one for starting and one for charging, each covering at least eight branch points, plus a 30-question Domain 6 quiz at 85% or better
General Engine Diagnosis & Cylinder Head and Valve Train Diagnosis and Repair & Engine Block Diagnosis and Repair & Lubrication and Cooling Systems Diagnosis and Repair & Fuel, Electrical, Ignition, and Exhaust Systems Diagnosis and Repair & Engine Starting and Charging Systems Diagnosis and Repair
Re-answer every missed item from weeks 1 through 7 and write the correct reasoning in one sentence each
Complete two full-length timed practice exams under test-day conditions with no references
Review the A1 task list and flag any task that cannot be explained aloud in one sentence
Convert flagged tasks into a short remediation list ranked by domain weight
Your checkpoint
A full-length 75-question practice exam scored at 85% or better plus a one-page ranked weak-area remediation list
Milestones
Week 4: Score 75% or better on the 60-question mid-plan exam covering Domains 1 through 3 and correctly diagnose at least 6 of 8 written wear-pattern scenarios
Week 6: Score 80% or better on each of the Domain 4 and Domain 5 quizzes and complete all three lubrication, cooling, and circuit write-ups without referencing notes
Week 8: Score 85% or better on a full-length timed 75-question practice exam and show an empty backlog of unexplained A1 tasks on the remediation list