AUTONATOMY · COURSE 02 / SUBCOURSE 04 / MINI COURSE 10

Component Identification
& Testing

Recognize it. Find it on a schematic. Choose a safe test. Interpret the measurement—then make a diagnostic decision.

10 guided lessons4 interactive labs3 diagnostic cases8-question assessmentOffline prototype

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01 · Understand it

10 guided lessons

Open each lesson and mark it complete. This mini course brings together the components studied throughout the subcourse.

02 · Explore it

Component identification workbench

Select each illustrated component to reveal its family, main job, a schematic clue, and where you may encounter it on a vehicle. These are simplified training illustrations, not exact product drawings.

Select a component to begin.

Identification checkpoint

Choose the component that best matches each job. You need at least 4 of 5 correct answers to pass this lab.

Complete the five matches, then check your answers.

03 · Recognize it

Schematic symbol matching

Use these simplified symbols to match a schematic pattern to a component. Actual symbols vary with diagram standard, device type, and manufacturer.

Score at least 4 of 5 to complete this lab.

04 · Measure it

Virtual multimeter & component tester

Select a component, specimen condition, and meter mode. Read the simulated display and compare it to the expected behavior. Use the training examples below to practice choosing the right test, not just getting a number.

Safe testing rule: Disconnect and de-energize a circuit before resistance, continuity, diode, or capacitance tests. Isolate the component as directed by service information. Safely discharge capacitors first. Never use resistance/continuity mode on an energized circuit. High-voltage vehicle systems require OEM procedures and appropriate qualification.

Component under test

Bench specimen

Meter mode

Lead orientation

Relay coil command (contact specimen)

Ω220.0 Ω

● Red lead — ● Black lead

Reading notes

Choose your setup and take a measurement.

Checkpoint: for a diode removed from its circuit, which mode directly checks forward and reverse junction behavior?

Correctly select the test to complete this lab.

05 · Diagnose it

Live-circuit voltage-drop lab

A lamp is fed through a 0.10 Ω wiring/connection path and returns through an adjustable ground path. While the lamp is on, watch how excessive resistance changes voltage at the lamp and ground. All quantities are calculated for a simplified 12.6 V DC resistive lamp model; real bulbs, wires, and connectors are not perfectly linear.

Ground-path resistance: 0.0 Ω

Voltmeter red lead (black at battery −)

Circuit current

2.07 A

Voltage across lamp

12.39 V

Ground-path voltage drop

0.00 V

Meter display

12.60 V

Checkpoint: With the lamp switched on, you read 4.2 V between the lamp's ground terminal (red) and battery negative (black). What does that support?

The ground path has zero resistance.A significant voltage drop exists on the loaded ground path.The battery must be discharged.

Choose an interpretation to complete this lab.

06 · Think like a technician

The Challenger's diagnostic cases

Read the measurements, choose the next supported action, and inspect the reasoning. No single measurement proves every possible fault.

07 · Prove it

Final knowledge check

Answer all eight questions. 7 of 8 correct earns a passing assessment; you can review explanations and try again.

Submit all eight answers to see your score.

08 · Completion

Your component testing badge

Complete the ten lessons, four labs, three diagnostic cases, and final assessment.

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Finish all activities to unlock the Autonatomy component testing completion badge.

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