Built module by module, in the order a technician actually needs it.

By the end of this module

Understand core automotive electrical principles, use a digital multimeter safely, interpret common readings and begin diagnosing basic electrical faults logically.

By the end of this module

Test, judge and prove the vehicle's power foundation before chasing anything downstream.

By the end of this module

Understand exactly how a load is protected, switched and controlled — then test the control path.

By the end of this module

Diagnose click, no-crank, slow-crank and intermittent starting with evidence, not parts.

By the end of this module

Systematically diagnose undercharge and overcharge on conventional and intelligent charging systems.

By the end of this module

Find harness faults that continuity testing hides, and repair them to a professional standard.

By the end of this module

Trace an unfamiliar circuit from battery to load to ground on any manufacturer's diagram.

By the end of this module

Choose the correct measurement for the fault in front of you — and trust the result.

By the end of this module

Track down the circuit or module keeping a vehicle awake, including intermittent drains.

By the end of this module

Capture a clean, meaningful waveform and know what it is actually telling you.

By the end of this module

Identify what type of sensor you are dealing with, and therefore how to test it.

By the end of this module

Diagnose a missing or dragged-down 5V reference systematically instead of by substitution.

By the end of this module

Prove a position or speed signal is correct — in amplitude, frequency and correlation.

By the end of this module

Plausibility-check any measurement device against the physics it is reporting.

By the end of this module

Diagnose emissions sensing electrically before condemning expensive components.

By the end of this module

Prove whether the ECU is actually commanding an output — and whether the output obeyed.

By the end of this module

Work a petrol no-start, misfire or running fault as a system, not a parts list.

By the end of this module

Diagnose diesel no-start and running faults from the electrical evidence.

By the end of this module

Use scope evidence to convict or clear an ignition or injection circuit.

By the end of this module

Plausibility-check commanded versus actual across throttle, air and boost control.

By the end of this module

Understand the electrical principles that make every CAN measurement meaningful.

By the end of this module

Isolate the module or segment causing a communication failure.

By the end of this module

Separate a LIN communication fault from a power or ground fault at the slave.

By the end of this module

Adapt your diagnostic approach to high-speed and optical vehicle networks.

By the end of this module

Diagnose the vehicle where half the modules have apparently disappeared.

By the end of this module

Diagnose body and access faults through the module that actually controls them.

By the end of this module

Attack "the passenger heated seat doesn't work" with a plan, not a guess.

By the end of this module

Diagnose chassis electronics and the communication that ties them together.

By the end of this module

Reason about safety-critical systems correctly — and know exactly where to stop.

By the end of this module

Diagnose ADAS electrically and know when calibration is required after repair.

By the end of this module

Understand how a fault in one power domain shows up in another.

By the end of this module

Build a hybrid diagnostic strategy within safe, clearly defined competency limits.