Diagnose Any Vehicle Fault — Petrol, Diesel, Hybrid, or EV

Mastering Onboard Diagnostics

This foundational module establishes every competency students need before touching a fault — from understanding OBD-II/EOBD legislation and architecture across Petrol, Diesel, Hybrid, and EV platforms, to professional scan tool operation, oscilloscope mastery, and a structured diagnostic workflow aligned with US (ASE) and UK (IMI/ATA) accreditation standards. Nothing in later modules is attempted without these prerequisite skills.

Engine Misfire Diagnostics

Builds directly on Module 1 scan tool and oscilloscope skills to diagnose the full spectrum of misfire causes — ignition, fuel, mechanical, and hybrid-specific — across petrol, diesel (which uses glow plugs not ignition coils), and hybrid drivetrains. Students learn to use misfire counters, cylinder contribution tests, in-cylinder pressure waveforms, and compression data to pinpoint root cause rather than parts-swap.

NVH Principles & Diagnostics

Equips students with the theory and practical skills to diagnose Noise, Vibration, and Harshness complaints systematically across all drivetrain types. This module bridges mechanical diagnostic skills with electronic tools (NVH analysers, data loggers) and is sequenced after misfire diagnostics because many NVH complaints originate from engine combustion irregularities already studied.

Critical Engine Sensor Diagnostics

This module delivers systematic, test-first diagnostics for every critical engine sensor — starting with the starter/relay circuit, through crankshaft and camshaft sensors (prerequisites for all timing and injection control), oil pressure, and the air charge sensors (MAF, MAP, BARO, IAT). The sequencing mirrors signal flow from engine start to fuelling and air management. All sensors are tested across petrol, diesel, hybrid, and EV contexts where applicable.

Fuel System, Diesel, Turbocharger & Emissions Diagnostics

The most component-dense module, covering the complete fuel delivery and emissions management chain across petrol GDI, common-rail diesel, and hybrid architectures. Students progress logically from fuel supply (petrol and diesel pressure), through combustion quality (FRP sensor, injectors), to exhaust aftertreatment (O2 sensor, EGR, DPF), ensuring every diagnosis is data-driven and evidence-based. High-voltage fuel pump awareness is included for EV/Hybrid platforms.

Vehicle Network, Safety Systems & Advanced Sensor Diagnostics

The capstone module covers the digital communication backbone that connects every system previously studied, then applies that knowledge to safety-critical and driver-input systems — SRS airbags, ESP stability control, and accelerator pedal position. The module closes with structured certification preparation and professional portfolio completion to fulfil US (ASE) and UK (IMI/ATA) accreditation requirements.

Starter Relay Diagnostics

In this module, you'll develop a thorough understanding of starter relay operation and learn how to systematically diagnose faults that prevent a vehicle from cranking or starting. We begin by exploring the starter relay's role within the broader starting circuit — covering how it controls high-current flow to the starter motor and how it interacts with the ignition switch, battery, and engine control systems across Petrol, Diesel, EV, and Hybrid platforms. You'll learn to identify the common symptoms of a faulty starter relay, including no-crank conditions, intermittent starting faults, and unusual clicking noises, before moving into hands-on diagnostic procedures. Using both basic electrical tools and professional scan tools, you'll practise testing relay coil resistance, contact continuity, voltage drop, and control-side trigger signals — building a repeatable, evidence-based diagnostic workflow. By the end of this module, you'll be able to confidently distinguish a defective starter relay from other starting system faults, accurately interpret your test results, and carry out or recommend the correct repair — skills directly applicable to real-world workshop diagnostics.

Oil Pressure Sensor Diagnostics

A precision-focused module that trains technicians to diagnose the full range of oil pressure sensor circuit faults — from hard electrical failures to subtle signal performance issues — using live scan data, oscilloscope waveforms, and systematic circuit testing. Every lesson is grounded in real fault conditions across petrol, diesel, and hybrid platforms, giving technicians the tools to distinguish a failed sensor from a wiring fault, and a circuit fault from an actual lubrication problem — before engine damage occurs.

Crankshaft Sensor Diagnostics

A deep-dive into one of the most safety-critical sensors on any engine — the crankshaft position sensor (CKP). This module works through all four major failure signatures — signal performance degradation, voltage low, voltage high, and intermittent dropout — using real oscilloscope captures, live scan data, and structured fault-finding routines. By the end, technicians will distinguish a wiring fault from a sensor fault from a trigger-wheel fault with confidence, every time.

Camshaft Sensor Diagnostics

A forensic deep-dive into Variable Valve Timing (VVT) circuit faults — covering both the oil-control solenoid valves that drive cam phasing and the Hall-effect sensors that report cam position back to the ECM. You'll work through negative and positive control actuator valve failures, then tackle the two most common camshaft position sensor voltage faults, using live scan data, waveforms, and pressure readings to pinpoint root cause every time.

MAF Sensor Diagnostics

A precision-focused deep dive into MAF sensor fault diagnosis across petrol and diesel platforms — covering signal performance degradation, short-to-ground wiring faults, and out-of-range high-voltage conditions. You'll work directly with live data, oscilloscope waveforms, and DTC freeze-frame evidence to isolate root causes fast and avoid misdiagnosis.

MAP & BARO Sensor Diagnostics

A precision fault-finding module covering every failure mode across pull-up and pull-down type MAP sensors and barometric pressure sensors — from voltage rail collapses to signal drift and dead shorts. Using live scan data, oscilloscope waveforms, and pinpoint voltage drop testing, you'll learn to distinguish sensor hardware failure from wiring faults, PCM reference supply issues, and ground integrity problems, so you close the job with a verified root cause every time.

IAT Sensor Diagnostics

Picks up directly where IAT Sensor Diagnostics leaves off — drilling into the three most common IAT fault codes a technician will encounter on the workshop floor. Each lesson works through a specific DTC category using real scan data, live waveforms, and circuit-level reasoning to separate a genuine sensor failure from a wiring fault, connector issue, or ECM input problem. By the end, you'll diagnose any IAT circuit fault with confidence, first time.

Fuel System Diagnostics

FRP Sensor Diagnostics

A precision deep-dive into diagnosing Fuel Rail Pressure (FRP) sensor voltage faults across pull-up and pull-down circuit architectures. Each lesson isolates a specific fault condition — high or low signal voltage — and maps the exact electrical behaviour, likely root causes, and step-by-step diagnostic workflow using live scan data, wiring diagrams, and a multimeter or oscilloscope. By the end of this module, you'll be able to distinguish a genuine sensor failure from a wiring fault, a short to voltage from a short to ground, and a pull-up circuit from a pull-down circuit — without guesswork.

Diesel Pressure Regulator Diagnostics

A focused deep-dive into diagnosing diesel pressure regulator faults across all three failure modes — performance deviation, voltage low, and voltage high — using live FRP data, oscilloscope waveforms, and common-rail system behaviour. You'll work through each fault type the same way you would on the workshop floor: scan data first, circuit second, component last.

Turbocharger Diagnostics

A deep-dive into diagnosing boost control failures across both wastegate and variable geometry turbocharger (VGT) systems — covering underboost and overboost fault conditions with real scan data, live pressure waveforms, and actuator-level testing. By the end of this module, technicians will confidently isolate whether a boost fault originates from a mechanical, pneumatic, electronic, or ECU-commanded failure, regardless of turbo architecture.

Oxygen Sensor Diagnostics

A precision-focused module that takes technicians beyond basic O2 sensor replacement and into circuit-level fault isolation — covering narrow band sensor performance degradation, heater circuit failures, and wide band pump cell faults. Every lesson is built around real scan data patterns, oscilloscope waveforms, and live vehicle behaviour so you can pinpoint root cause before you touch a component.

EGR Diagnostics