DIET 1010 Syllabus
Subject Code
DIET
Course Number
1010
Course Title
Diesel Electrical and Electronic Systems
Prerequisites
Prerequisite/Corequisite: DIET 1000
Corequisites
Terms Offered
Offered Fall
Credit Hours
(2-13-7)
Course Description
This course introduces students to electrical and electronic systems used on medium and heavy duty trucks and heavy equipment. Topics include general electrical system diagnosis, battery diagnosis and repair, starting system diagnosis and repair, charging system diagnosis and repair, lighting system diagnosis and repair, gauges and warning devices, and an introduction and familiarization with electrical and electronic systems. Students must pay a $25 supply when registering for this course.
Course Outcomes
General Electrical Systems Diagnosis
Order Description
1 Read and interpret electrical/electronic circuits using wiring diagrams P-1
2 Demonstrate an understanding of the terms and definitions
3 Observe continuity in electrical/electronic circuits using appropriate test equipment P-1
4 Observe applied voltages, circuit voltages, and voltage drops in electrical/electronic circuits
using appropriate test equipment P-1
5 Observe current flow in electrical/electronic circuits and components using appropriate test
equipment P-1
6 Observe resistance in electrical/electronic circuits or components using appropriate test
equipment P-1
7 Locate shorts, grounds, and opens in electrical/electronic circuits P-1
8 Identify parasitic (key off) battery drain problems P-1
9 Inspect and test fusible links, circuit breakers, relays, solenoids, and fuses; replace as needed
P-2
10 Inspect and test spike suppression devices; replace as needed P-3
11 Check frequency and pulse width signal in electrical/electronic circuits using appropriate test
equipment P-3
Battery Diagnosis and Repair
Order Description
1 Perform a battery load test; determine needed action P-1
2 Determine battery state of charge using and open circuit voltage test P-2
3 Inspect, clean and service battery; replace as needed P-2
4 Inspect and clean battery boxes, mounts, and hold downs; repair or replace as needed P-2
5 Perform charging procedure for battery using slow or fast charge method as appropriate P-2
6 Inspect, test, and clean battery cables and connectors; repair or replace as needed P-1
7 Perform jump start of a vehicle using jumper cables and a booster battery or auxiliary power
supply using proper safety procedures P-2
8 Perform battery capacitance test; determine needed action P-2
Starting System Diagnosis and Repair
Order Description
1 Perform a starter current draw test; determine needed action P-3
2 Perform starter circuit cranking voltage and voltage drop tests; determine needed action P-1
3 Inspect, test, and replace components (key switch, push button, and/or magnetic switch) and
wires in the starter control circuit P-2
4 Inspect, test, and replace starter relays, solenoids, and switches P-2
5 Perform removal and replacement of starter P-3
6 Inspect flywheel ring gear or flex plate P-3
Charging System Diagnosis and Repair
Order Description
1 Test instrument panel mounted volt meters and/or indicator lamps; determine needed action
P-1
2 Identify the causes of a no charge, low charge, or over charge problems; determine needed
action P-1
3 Inspect and replace alternator drive belts, pulleys, fans, tensioners, and mounting brackets;
adjust drive belts and check alignment P-1
4 Perform charging system voltage and amperage output test; perform AC ripple test; determine
needed action P-1
5 Perform charging circuit voltage drop tests; determine needed action P-1
6 Perform removal and replacement of alternator P-3
7 Inspect, repair, or replace cables, wires and connectors in the charging circuit P-2
Lighting Systems Diagnosis and Repair
Order Description
1 Interface with vehicle's on-board computer; perform diagnostic procedures using recommended
electronic diagnostic equipment and tools (including PC based software and/or data scan tools);
determine needed action P-1
2 Identify causes of brighter than normal, intermittent, dim, or no headlight and daytime running
light (DRL) operation P-1
3 Test, aim, and replace headlights P-2
4 Test headlight and dimmer circuit switches, relays, wires, terminals, connectors, sockets, and
control components/modules; repair or replace as needed P-2
5 Inspect and test switches, bulbs/LEDs, sockets, connectors, terminals, relays, wires, and control
components/modules of parking, clearance, and taillight circuits; repair or replace as needed
P-2
6 Inspect and test instrument panel light circuit switches, relays, bulbs/LEDs, sockets, connectors,
terminals, wires, and printed circuits/control modules; repair or replace as needed P-2
7 Inspect and test interior cab light circuit switches, bulbs, sockets, connectors, terminals, wires
and control components/modules; repair or replace as needed P-2
8 Inspect and test tractor-to-trailer multi-wire connectors; repair or replace as needed P-2
9 Inspect, test, and adjust stop light circuit switches, bulbs/LEDs, sockets, connectors, terminals,
wires and control components/modules; repair or replace as needed P-1
10 Inspect and test turn signal and hazard circuit flasher(s), switches, relays, bulbs/LEDs, sockets,
connectors, terminals, wires and control components/modules; repair or replace as needed P-1
11 Inspect and test reverse lights and warning device circuit switches, bulbs/LEDs, sockets, horns,
buzzers, connectors, terminals, wires and control components/modules; repair or replace as
needed P-2
Gauges and Warning Devices
Order Description
1 Interface with vehicle's on board computer perform diagnostic procedure using recommended
electronic diagnostic equipment and tools (including PC based software and/or data scan tools);
determine needed action P-1
2 Identify the causes of intermittent, high, low, or no gauge readings; determine needed action
P-2
3 Identify the causes of data bus-driven gauge malfunctions; determine needed action P-3
4 Inspect and test gauge circuit sensor/sending units, gauges, connectors, terminals, and wires;
repair or replace as needed P-2
5 Inspect and test warning devices (lights and audible) circuit sensor/sending units, bulbs/LEDs,
sockets, connectors, wires, and control components/modules; repair or replace as needed P-2
6 Inspect, test, replace, and calibrate (if applicable) electronic speedometer, odometer, and
tachometer systems P-2
Related Electrical Systems
Order Description
1 Interface with vehicle's on-board computer; perform diagnostic procedures using recommended
electronic diagnostic equipment and tools (including PC based software and/or data scan tools);
determine needed action P-1
2 Identify causes of constant, intermittent, or no horn operation; determine needed action P-2
3 Inspect and test horn circuit relays, horns, switches, connectors, wires and control
components/modules; repair or replace as needed P-2
4 Identify causes of constant, intermittent, or no wiper operation; determine needed action P-2
5 Diagnose the cause of wiper speed control and/or park problems; determine needed action P-2
6 Inspect and test wiper motor, resistors, park switch, relays, switches, connectors, and wires;
repair or replace as needed P-2
7 Inspect wiper motor transmission linkage, arms, and blades; adjust or replace as needed P-2
8 Inspect and test windshield washer motor or pump/relay assembly, switches, connectors,
terminals, wires and control components/modules; repair or replace as needed P-3
9 Inspect and test side view mirror motors, heater circuit grids, relays, switches, connectors,
terminals, wires and control components/modules; repair or replace as needed P-3
10 Inspect and test heater and A/C electrical components including: A/C clutches, motors,
resistors, relays, switches, connectors, terminals, wires and control components/modules;
repair or replace as needed P-3
11 Inspect and test auxiliary power outlet, integral fuse, connectors, terminals, wires and control c
omponents/modules; repair or replace as needed P-3
12 Identify causes of slow, intermittent, or no power side window operation; determine needed
action P-3
13 Inspect and test motors, switches, relays, connectors, terminals, wires and control
components/modules of power side window circuits; repair or replace as needed P-3
14 Inspect and test block heaters; determine needed repairs P-2
15 Inspect and test cruise control electrical components; repair or replace as needed P-3
16 Inspect and test switches, relays, controllers, actuator/solenoids, connectors, terminals, and
wires of electric door lock circuits P-3
17 Check operation of keyless and remote lock/unlock devices; determine needed action P-3
18 Inspect and test engine cooling fan electrical control components/modules; repair or replace as
needed P-2
19 Identify causes of data bus communication problems; determine needed action P-2