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Advance Engine Electronics & Fuel System Service

AUT 226

Advance Engine Electronics & Fuel System Service

AUT 226

Course Description

Prerequisites: Prerequisites: Minimum "C" (2.

0) grade in AUT 110, AUT 210, and AUT 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. Credit may be earned in AUT 220 and AUT 222 or AUT 226 but not in both. (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