Curriculum
Module 08specialist
Diagnostic Method
Turn measurements into a disciplined workflow for opens, shorts, drains, modules and complete vehicle diagnosis.
Lessons
10
Estimated time
350 min
Completed
00/10
By the end of this module
Follow a repeatable evidence-led process from complaint to proven cause and verified repair.
Lessons
10 total
- 47Power–ground–signal: the default frameworkUnknown component, unfamiliar car, no idea where to begin. Use one framework that works almost everywhere.Members only35 min
- 48Test the connector before replacing the componentFault code names the component. Parts cannon says replace it. Diagnostics says prove the connector first.Members only35 min
- 49Loaded circuit testingMeter shows battery voltage. Connect the actual load and everything dies.Members only35 min
- 50Finding open circuitsSignal disappears somewhere between sensor and ECU. Where exactly is the broken wire?Members only35 min
- 51Finding shorts to groundFuse blows immediately every time it is replaced.Members only35 min
- 52Finding shorts to positive and back-feedsCircuit is ‘off’ but still has voltage coming from somewhere.Members only35 min
- 53Parasitic battery drainsLocked vehicle appears asleep, then current jumps every few minutes and kills the battery overnight.Members only35 min
- 54When pulling one fuse kills the drainYou pull a fuse and current drops from 600 mA to 20 mA. Have you found the faulty component? Not yet.Members only35 min
- 55ECUs and control modulesScanner says ‘no communication with module’. Does that mean the ECU is dead?Members only35 min
- 56The complete Voltzs diagnostic workflowA vehicle arrives with an electrical fault you have never seen before. What exact order stops you guessing?Members only35 min