AGM 226 - Advance Engine Electronics & Fuel System Service (GM)

1. Diagnose general engine. Complete 95% of Priority 1, 80% of Priority 2, and 50% of Priority 3 NATEF tasks as listed below.
   1. Identify and interpret engine performance concern; determine necessary action. P-1
   2. Research applicable vehicle and service information, such as engine management system operation, vehicle service history, service precautions, and technical service bulletins. P-1
   3. Locate and interpret vehicle and major component identification numbers (VIN, vehicle certification labels, and calibration decals). P-1
   4. Inspect engine assembly for fuel, oil, coolant, and other leaks; determine necessary action. P-2
   5. Diagnose abnormal engine noise or vibration concerns; determine necessary action. P-2
   6. Diagnose abnormal exhaust color, odor, and sound; determine necessary action. P-2
   7. Perform engine absolute (vacuum/boost) manifold pressure tests; determine necessary action. P-1
   8. Perform cylinder power balance test; determine necessary action. P-1
   9. Perform cylinder compression tests; determine necessary action. P-1
   10. Perform cylinder leakage test; determine necessary action. P-1
   11. Diagnose engine mechanical, electrical, electronic, fuel, and ignition concerns with an oscilloscope and/or engine diagnostic equipment; determine necessary action. P-1
   12. Prepare 4 or 5 gas analyzer; inspect and prepare vehicle for test, and obtain exhaust readings; interpret readings, and determine necessary action. P-1
   13. Verify engine operating temperature; determine necessary action. P-1
   14. Perform cooling system pressure tests; check coolant condition; inspect and test radiator, pressure cap, coolant recovery tank, and hoses; perform necessary action. P-1
   15. Verify correct camshaft timing. P-2
2. Diagnose and repair computerized engine controls. Complete 95% of Priority 1, 80% of Priority 2, and 50% of Priority 3 NATEF tasks as listed below.
   1. Retrieve and record stored OBD I diagnostic trouble codes; clear codes. P-2
   2. Retrieve and record stored OBD II diagnostic trouble codes; clear codes. P-1
   3. Diagnose the causes of emissions or driveability concerns resulting from malfunctions in the computerized engine control system with stored diagnostic trouble codes. P-1
   4. Diagnose emissions or driveability concerns resulting from malfunctions in the computerized engine control system with no stored diagnostic trouble codes; determine necessary action. P-1
   5. Check for module communication errors using a scan tool. P-2
   6. Inspect and test computerized engine control system sensors, powertrain control module (PCM), actuators, and circuits using a graphing multimeter (GMM)/digital storage oscilloscope (DSO); perform necessary action. P-1
   7. Obtain and interpret scan tool data. P-1
   8. Access and use service information to perform step-by-step diagnosis. P-1
   9. Diagnose driveability and emissions problems resulting from malfunctions of interrelated systems (cruise control, security alarms, suspension controls, traction controls, A/C, automatic transmissions, non-OEM-installed accessories, or similar systems); determine necessary action. P-3
3. Diagnose and repair fuel, air induction, and exhaust system. Complete 95% of Priority 1, 80% of Priority 2, and 50% of Priority 3 NATEF tasks as listed below.
   1. Diagnose hot or cold no-starting, hard starting, poor driveability, incorrect idle speed, poor idle, flooding, hesitation, surging, engine misfire, power loss, stalling, poor mileage, dieseling, and emissions problems on vehicles with carburetor-type fuel systems; determine necessary action. P-3
   2. Diagnose hot or cold no-starting, hard starting, poor driveability, incorrect idle speed, poor idle, flooding, hesitation, surging, engine misfire, power loss, stalling, poor mileage, dieseling, and emissions problems on vehicles with injection-type fuel systems; determine necessary action. P-1
   3. Check fuel for contaminants and quality; determine necessary action. P-3
   4. Inspect