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Automotive Electronics Service

AUT 110

Automotive Electronics Service

AUT 110

Course Description

Prerequisite: WELD 101 and WELD 108; also Minimum C (2.0) grade in both AUT 100 and AUT 108. Studies electrical test equipment, battery, wiring diagram, starting and charging system terminology, operation, and diagnosis. Develops skills in diagnosis of battery, diagnosis and repair of starting and charging systems and application of wiring diagrams. (40-40)

Outcomes and Objectives

Diagnose and repair of General Electrical Systems. Complete 95% of Priority 1, 80% of Priority 2, and 50% of Priority 3 NATEF tasks as listed below.

Objectives:

  • Identify and interpret electrical/electronic system concern; determine necessary action. P-1
  • Research applicable vehicle and service information, such as electrical/electronic 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
  • Diagnose electrical/electronic integrity for series, parallel and series-parallel circuits using principles of electricity (Ohm’s Law). P-1
  • Use wiring diagrams during diagnosis of electrical circuit problems. P-1
  • Demonstrate the proper use of a digital multimeter (DMM) during diagnosis of electrical circuit problems. P-1
  • Check electrical circuits with a test light; determine necessary action. P-2
  • Measure source voltage and perform voltage drop tests in electrical/electronic circuits using a voltmeter; determine necessary action. P-1
  • Measure current flow in electrical/electronic circuits and components using an ammeter; determine necessary action. P-1
  • Check continuity and measure resistance in electrical/electronic circuits and components using an ohmmeter; determine necessary action. P-1
  • Check electrical circuits using fused jumper wires; determine necessary action. P-2
  • Locate shorts, grounds, opens, and resistance problems in electrical/electronic circuits; determine necessary action. P-1
  • Measure and diagnose the cause(s) of excessive key-off battery drain (parasitic draw); determine necessary action. P-1
  • Inspect and test fusible links, circuit breakers, and fuses; determine necessary action. P-1
  • Inspect and test switches, connectors, relays, solid state devices, and wires of electrical/electronic circuits; perform necessary action. P-1
  • Repair wiring harnesses and connectors. P-1
  • Perform solder repair of electrical wiring. P-1

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

Objectives:

  • Perform battery state-of-charge test; determine needed service. P-1
  • Perform battery capacity test; confirm proper battery capacity for vehicle application; determine necessary action. P-1
  • Maintain or restore electronic memory functions. P-1
  • Inspect, clean, fill, and replace battery. P-2
  • Perform slow/fast battery charge. P-2
  • Inspect and clean battery cables, connectors, clamps, and hold-downs; repair or replace as needed. P-1
  • Start a vehicle using jumper cables and a battery or auxiliary power supply. P-1

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

Objectives:

  • Perform starter current draw tests; determine necessary action. P-1
  • Perform starter circuit voltage drop tests; determine necessary action. P-1
  • Inspect and test starter relays and solenoids; determine necessary action. P-2
  • Remove and install starter in a vehicle. P-1
  • Inspect and test switches, connectors, and wires of starter control circuits; perform necessary action. P-2
  • Differentiate between electrical and engine mechanical problems that cause a slow-crank or no-crank condition. P-2

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

Objectives:

  • Perform charging system output test; determine necessary action. P-1
  • Diagnose charging system for the cause of undercharge, no-charge, and overcharge conditions. P-1
  • Inspect, adjust, or replace generator (alternator) drive belts, pulleys, and tensioners; check pulley and belt alignment. P-2
  • Remove, inspect, and install generator (alternator). P-1
  • Perform charging circuit voltage drop tests; determine necessary action. P-1