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Advance Engine Electronics & Fuel System Service (GM)

AGM 226

Advance Engine Electronics & Fuel System Service (GM)

AGM 226

Course Description

Prerequisites: Prerequisites: Minimum "C" (2.

0) grade in AGM 112. Studies electronic inputs to the computerized engine controls; units of instruction necessary to develop a thorough understanding of induction systems and injection systems. Develops skills through controlled learning experiences with sensors, fuel delivery, and fuel injection systems. (60-90)

Outcomes and Objectives

Diagnose general engine. Complete 95% of Priority 1, 80% of Priority 2, and 50% of Priority 3 NATEF tasks as listed below.

Objectives:

  • Identify and interpret engine performance concern; determine necessary action. P-1
  • Research applicable vehicle and service information, such as engine management system operation, vehicle service history, service precautions, and technical service bulletins. P-1
  • Locate and interpret vehicle and major component identification numbers (VIN, vehicle certification labels, and calibration decals). P-1
  • Inspect engine assembly for fuel, oil, coolant, and other leaks; determine necessary action. P-2
  • Diagnose abnormal engine noise or vibration concerns; determine necessary action. P-2
  • Diagnose abnormal exhaust color, odor, and sound; determine necessary action. P-2
  • Perform engine absolute (vacuum/boost) manifold pressure tests; determine necessary action. P-1
  • Perform cylinder power balance test; determine necessary action. P-1
  • Perform cylinder compression tests; determine necessary action. P-1
  • Perform cylinder leakage test; determine necessary action. P-1
  • Diagnose engine mechanical, electrical, electronic, fuel, and ignition concerns with an oscilloscope and/or engine diagnostic equipment; determine necessary action. P-1
  • Prepare 4 or 5 gas analyzer; inspect and prepare vehicle for test, and obtain exhaust readings; interpret readings, and determine necessary action. P-1
  • Verify engine operating temperature; determine necessary action. P-1
  • Perform cooling system pressure tests; check coolant condition; inspect and test radiator, pressure cap, coolant recovery tank, and hoses; perform necessary action. P-1
  • Verify correct camshaft timing. P-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.

Objectives:

  • Retrieve and record stored OBD I diagnostic trouble codes; clear codes. P-2
  • Retrieve and record stored OBD II diagnostic trouble codes; clear codes. P-1
  • Diagnose the causes of emissions or driveability concerns resulting from malfunctions in the computerized engine control system with stored diagnostic trouble codes. P-1
  • 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
  • Check for module communication errors using a scan tool. P-2
  • 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
  • Obtain and interpret scan tool data. P-1
  • Access and use service information to perform step-by-step diagnosis. P-1
  • 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

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.

Objectives:

  • 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
  • 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
  • Check fuel for contaminants and quality; determine necessary action. P-3
  • Inspect and test mechanical and electrical fuel pumps and pump control systems for pressure, regulation and volume; perform necessary action. P-1
  • Replace fuel filters. P-1
  • Inspect and test cold enrichment system and components; perform necessary action. P-3
  • Inspect throttle body, air induction system, intake manifold and gaskets for vacuum leaks and/or unmetered air. P-2
  • Inspect and test fuel injectors. P-2
  • Check idle speed and fuel mixture. P-2
  • Adjust idle speed and fuel mixture. P-3
  • Inspect the integrity of the exhaust manifold, exhaust pipes, muffler(s), catalytic converter(s), resonator(s), tail pipe(s), and heat shield(s); perform necessary action. P-2
  • Perform exhaust system back-pressure test; determine necessary action. P-1
  • Test the operation of turbocharger/supercharger systems; determine necessary action. P-3

Diagnose and repair positive crankcase ventilation. Complete 95% of Priority 1, 80% of Priority 2, and 50% of Priority 3 NATEF tasks as listed below.

Objectives:

  • Diagnose oil leaks, emissions, and driveability problems resulting from malfunctions in the positive crankcase ventilation (PCV) system; determine necessary action. P-2
  • Inspect, test and service positive crankcase ventilation (PCV) filter/breather cap, valve, tubes, orifices, and hoses; perform necessary action. P-2

Diagnose and repair exhaust gas recirculation. Complete 95% of Priority 1, 80% of Priority 2, and 50% of Priority 3 NATEF tasks as listed below.

Objectives:

  • Diagnose emissions and driveability problems caused by malfunctions in the exhaust gas recirculation (EGR) system; determine necessary action. P-1
  • Inspect, test, service and replace components of the EGR system, including EGR tubing, exhaust passages, vacuum/pressure controls, filters and hoses; perform necessary action. P-2
  • Inspect and test electrical/electronic sensors, controls, and wiring of exhaust gas recirculation (EGR) systems; perform necessary action. P-2

Diagnose and repair exhaust gas treatment. Complete 95% of Priority 1, 80% of Priority 2, and 50% of Priority 3 NATEF tasks as listed below.

Objectives:

  • Diagnose emissions and driveability problems resulting from malfunctions in the secondary air injection and catalytic converter systems; determine necessary action. P-2
  • Inspect and test mechanical components of secondary air injection systems; perform necessary action. P-3
  • Inspect and test electrical/electronically-operated components and circuits of air injection systems; perform necessary action. P-3
  • Inspect and test catalytic converter performance. P-1

Diagnose and repair intake air temperature controls. Complete 95% of Priority 1, 80% of Priority 2, and 50% of Priority 3 NATEF tasks as listed below.

Objectives:

  • Diagnose emissions and driveability problems resulting from malfunctions in the intake air temperature control system; determine necessary action. Diagnose emissions and driveability problems resulting from malfunctions in the intake air temperature control system; determine necessary action. P-3
  • Inspect and test components of intake air temperature control system; perform necessary action. P-3

Perform engine related service. Complete 95% of Priority 1, 80% of Priority 2, and 50% of Priority 3 NATEF tasks as listed below.

Objectives:

  • Remove and replace thermostat. P-2
  • Inspect and test mechanical/electrical fans, fan clutch, fan shroud/ducting, air dams, and fan control devices; perform necessary action. P-1