ASEP 167 - Automotive Electrical and HVAC Level 2

Credits: 4
Instructional Contact Hours: 4

1. Diagnose and complete general Level 2 ASE Education Foundation tasks for Automotive Electrical.
   1. Research vehicle service information such as fluid type, vehicle service history, service precautions, technical service bulletins, and recalls including xEVs and vehicles equipped with advanced driver assistance systems (ADAS).
   2. Identify electrical/electronic system components and configurations.
   3. Retrieve and record on-board diagnostics, DTCs, monitor status, and freeze frame data; clear codes and data when directed.
   4. Perform calibration/recalibration, initialization, or relearn procedures as required.
   5. Demonstrate knowledge of electrical/electronic series, parallel, and series-parallel circuits using principles of electricity (Ohm's Law).
   6. Demonstrate proper use of a digital multimeter (DMM) when measuring source voltage, voltage drop (including grounds), current flow and resistance.
   7. Demonstrate knowledge of the causes and effects from shorts, grounds, opens, and resistance problems in electrical/electronic circuits.
   8. Describe precautions related to the use of test lights.
   9. Use fused jumper wires to check operation of electrical circuits per service information.
   10. Use wiring diagrams during the diagnosis of electrical/electronic circuit problems.
   11. Diagnose the cause(s) of excessive key-off battery drain (parasitic draw); determine needed action.
   12. Inspect and test fusible links, circuit breakers, and fuses; determine needed action.
   13. Inspect, test, repair, and/or replace components, connectors, terminals, harnesses, and wiring in electrical/electronic systems (including solder repairs); determine needed action.
   14. Test and measure circuit using an oscilloscope and/or graphing multimeter (GMM); interpret results; determine needed action.
2. Diagnose and complete Level 2 ASE Education Foundation tasks for Batteries (Low Voltage).

1. Perform battery state-of-charge test; determine needed action.
2. Confirm proper battery capacity, size, type, and application for vehicle; perform battery capacity and load test as recommended by manufacturer; determine needed action.
3. Maintain or restore electronic memory functions as recommended by manufacturer.
4. Inspect and clean battery, check battery cables, connectors, clamps, and hold-downs.
5. Perform battery charging according to manufacturer’s recommendations.
6. Jump-start vehicle using jumper cables and a booster battery or an auxiliary power supply according to manufacturer’s recommendations.
7. Identify electrical/electronic modules, security systems, radios, and other accessories that require reinitialization or code entry after reconnecting vehicle battery.

3. Diagnose and complete Level 2 ASE Education Foundation tasks for Starting System (Low Voltage).

1. Perform starter current draw test; determine needed action.
2. Perform starter circuit voltage drop tests; determine needed action.
3. Inspect and test starter relays and solenoids; determine needed action.
4. Remove and install starter in a vehicle.
5. Inspect and test switches, connectors, and wires of starter control circuits; determine needed action.
6. Demonstrate knowledge of automatic idle-stop/start-stop system that uses a low-voltage starter to restart the engine.
7. Differentiate between electrical and engine mechanical problems that cause a slow-crank or a no-crank condition.
8. Diagnose a no-crank condition using a wiring diagram and test equipment; determine needed action.

4. Diagnose and complete Level 2 ASE Education Foundation tasks for Charging System (Low Voltage).

1. Perform charging system output test; determine needed action.
2. Inspect, adjust, and replace generator (alternator) drive belts; check pulleys and tensioners for wear; check pulley and belt alignment; determine needed action.
3. Remove, inspect, and replace generator (alternator); determine needed action.
4. Perform charging circuit voltage drop tests; determine needed action.
5. Diagnose charging system for causes of undercharge, no-charge, or overcharge conditions; determine needed action.

5. Diagnose and complete Level 2 ASE Education Foundation tasks for Lighting Systems.

1. Inspect interior and exterior lamps and sockets including headlights and auxiliary lights (fog lights/driving lights); determine needed action.
2. Aim headlights.
3. Diagnose the causes of brighter-than-normal, intermittent, dim, or no light operation; determine needed action.

6. Diagnose and complete Level 2 ASE Education Foundation tasks for Instrument Cluster and Driver Information Systems
   1. Verify operation of instrument panel gauges and warning/indicator lights; reset maintenance indicators as required.
   2. Inspect and test gauges and gauge sensors/sending units for causes of abnormal readings; determine needed action.
   3. Diagnose the causes of incorrect operation of warning devices and other driver information systems; determine needed action.
7. Diagnose and complete Level 2 ASE Education Foundation tasks for Body Electrical Systems.
   1. Diagnose vehicle comfort, convenience, access, safety, and related systems operation; determine needed action.
   2. Remove and reinstall door panel.
   3. Diagnose operation of security/anti-theft systems and related circuits (such as: theft deterrent, door locks, remote keyless entry, remote start, and starter/fuel disable); determine needed action.
   4. Describe disabling and enabling procedures for supplemental restraint system (SRS); verify indicator lamp operation.
   5. Verify windshield wiper and washer operation; replace wiper blades.
   6. Diagnose operation of entertainment/infotainment systems and related circuits (such as: radio, DVD, navigation, amplifiers, speakers, antennas, and voice-activated accessories); determine needed action.
   7. Diagnose operation of safety systems and related circuits (such as: horn, airbags, seat belt pretensioners, occupancy classification, wipers, and washers; determine needed action.Diagnose body electronic system circuits using a scan tool; check for module communication errors (data communication bus systems); determine needed action.
   8. Describe the process for software transfer, software updates, or reprogramming of electronic modules.
8. Diagnose and complete Level 2 ASE Education Foundation tasks for xEV Systems.
   1. Locate procedures to safe de-energize/disable and energize/enable high-voltage systems.

2. HEATING, VENTILATION, AND AIR CONDITIONING (HVAC)

1. Diagnose and complete general Level 2 ASE Education Foundation tasks for HVAC.

1. Research vehicle service information, including refrigerant/oil/fluid type, vehicle service history, service precautions, technical service bulletins, and recalls including xEVs and vehicles equipped with advanced driver assistance systems (ADAS).
2. Identify heating, ventilation, and air conditioning (HVAC) components and configurations.
3. Retrieve and record on-board diagnostics, DTCs, monitor status, and freeze frame data; clear codes and data when directed.
4. Perform A/C system performance test as recommended by manufacturer; interpret results; determine needed action.
5. Identify abnormal operating noises in the A/C system; determine needed action.
6. Leak test A/C system; determine needed action.
7. Verify and interpret heating and air conditioning concerns; determine needed action. Place a vehicle in service mode as needed before servicing and diagnosing the HVAC system.
8. Identify refrigerant type; test for sealant/contaminant; select and connect proper gauge set/test equipment; record temperature and pressure readings.
9. Inspect condition/quantity of refrigerant oil removed from A/C system; determine needed action.
10. Determine recommended oil and oil capacity for system application and component(s) replacement.

2. Diagnose and complete Level 2 ASE Education Foundation tasks for Refrigeration System Components.

1. Inspect, remove, and/or replace A/C compressor drive belts, pulleys, and tensioners; determine needed action.
2. Inspect for proper A/C condenser airflow; determine needed action.
3. Inspect evaporator housing condensation drain; determine needed action.
4. Inspect, test, and/or service A/C compressor clutch components and/or assembly; determine needed action.
5.  Remove, inspect, and reinstall, and/or replace A/C compressor and mountings; determine recommended oil type and quantity.
6. Remove and inspect A/C system hoses, lines, fittings, O-rings, seals, and service valves; determine needed action.
7. Remove, inspect, and replace receiver/drier, accumulator/drier, or desiccant; determine recommended oil type and quantity.
8. Remove, inspect, and install expansion valve or orifice (expansion) tube.
9. Diagnose A/C system conditions that cause the protection devices (pressure, thermal, and/or control module) to interrupt system operation; determine needed action.
10. Determine procedure to remove and reinstall evaporator; determine required oil type and quantity.
11. Remove, inspect, reinstall, and/or replace condenser; determine required oil type and quantity.

3. Diagnose and complete Level 2 ASE Education Foundation tasks for Heating, Ventilation, and Engine Cooling Systems.

1. Inspect engine cooling and heater systems hoses and pipes; determine needed action.
2. Inspect and test heater coolant control valve(s); determine needed action.
3. Diagnose temperature control problems in the HVAC system related to the engine cooling system, including electric heating; determine needed action.
4. Determine procedure to remove, inspect, reinstall, and/or replace heater core; properly refill system.

4. Diagnose and complete Level 2 ASE Education Foundation tasks for Operating Systems and Related Controls.

1.  Inspect HVAC system ducts, doors, hoses, cabin filters, and outlets; determine needed action.
2. Identify the source of HVAC system odors.
3. Inspect and test HVAC system blower motors, resistors, switches, relays, wiring, and protection devices; determine needed action.
4. Diagnose A/C compressor control systems; determine needed action.
5. Diagnose malfunctions in the vacuum, mechanical, and/or electrical components and controls of the HVAC system; determine needed action.
6. Inspect, test, remove and/or replace HVAC system control panel; determine needed action.
7. Check operation of automatic HVAC control systems; determine needed action.

5. Diagnose and complete Level 2 ASE Education Foundation tasks forRefrigerant Recovery, Recycling, and Handling.

1. Demonstrate knowledge of the requirement to recover, recycle, and handle refrigerants using proper equipment and procedures.
2. Use and maintain refrigerant handling equipment according to equipment manufacturer’s standards.
3. Identify A/C system refrigerant; test for sealants/contaminants; recover, evacuate, and charge A/C system; add refrigerant oil as required.
4. Recycle, label, and store refrigerant.