AST 202 - Engine Performance I
Credit Hours: 4
Billable Contact Hours: 7
Prerequisites: AST 101 , AUTO 101 or AST 105 and AST 102 or ELEC 125
Session Cycle: FL
This course focuses on automotive engine performance pertaining to the On Board Diagnostic system, the sensors that report information to the engine controller and the fuel system will be the focus of this course. Students will have an opportunity to utilize the various tools and procedures in order to understand the operation, diagnose malfunctions, and repair faults in these systems.
Notes: Applied Science and Engineering Technology Division
Theory Hours: 15
Lab Hours: 90
Learning Outcomes:
1. Understand and demonstrate computerized control system operation diagnosis and repair.
a) Retrieve and record diagnostic trouble codes, OBD monitor status, and freeze frame data; clear codes when applicable.
b) Access and use service information to perform step-by-step (troubleshooting) diagnosis.
c) Perform active tests of actuators using a scan tool; determine necessary action.
d) Describe the importance of running all OBDII monitors for repair verification.
e) Diagnose the causes of emissions or drivability concerns with stored or active diagnostic trouble codes; obtain, graph, and interpret scan tool data.
f) Diagnose emissions or drivability concerns without stored diagnostic trouble codes; determine necessary action.
g) Inspect and test computerized engine control system sensors, powertrain/engine control module (PCM/ECM), actuators, and circuits using a graphing multimeter (GMM)/digital storage oscilloscope (DSO); perform necessary action.
Applies to Automotive Service Technology, A.A.S. Outcomes A, B, C, D, E, and F.
2. Understand and demonstrate ignition system operation diagnosis and repair.
a) Diagnose (troubleshoot) ignition system related problems such as nostarting, hard starting, engine misfire, poor drivability, spark knock, power loss, poor mileage, and emissions concerns; determine necessary action.
b) Inspect and test crankshaft and camshaft position sensor(s); perform necessary action.
c) Inspect, test, and/or replace ignition control module, powertrain/engine control module; reprogram as necessary.
d) Remove and replace spark plugs; inspect secondary ignition components for wear and damage.
Applies to Automotive Service Technology, A.A.S. Outcomes A, B, C, D, E, and F.
3. Understand and demonstrate fuel, air induction, and exhaust system operation, diagnosis and repair.
a) Diagnose (troubleshoot) hot or cold no-starting, hard starting, poor drivability, incorrect idle speed, poor idle, flooding, hesitation, surging, engine misfire, power loss, stalling, poor mileage, dieseling, and emissions problems; determine necessary action.
b) Check fuel for contaminants; determine necessary action.
c) Inspect and test fuel pumps and pump control systems for pressure, regulation, and volume; perform necessary action.
d) Replace fuel filter(s).
e) Inspect, service, or replace air filters, filter housings, and intake duct work.
f) Inspect throttle body, air induction system, intake manifold and gaskets for vacuum leaks and/or unmetered air.
g) Inspect and test fuel injectors.
h) Verify idle control operation.
i) Check and refill diesel exhaust fluid (DEF).
j) Test the operation of turbocharger/supercharger systems; determine necessary action.
Applies to Automotive Service Technology, A.A.S. Outcomes A, B, C, D, E, and F.
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