Diagnostics
Vehicle and repair case studies from the workshop floor. Every listed path is already linked — filled articles and reserved stubs share the same URLs.
How we diagnose
No one tool covers every vehicle perfectly. We run a mix of professional platforms so we can get into the right control units — engine, ABS, airbag, body — and look at live data, not just a code list.
- Hand-held and PC-based scan tools for manufacturer-specific functions
- Live data / graphing when a stored code alone does not explain the fault
- Scope and wiring tests when the scanner points at a circuit, not a part
Case studies (50 live)
Full write-ups restored from the workshop archive.
Isuzu D-Max 4JJ1TCX — P0234 turbo overboost
Workshop case study — full write-up.
08213 , P2105, VW GOLF INTAKE MANIFOLD FLAP POSITION SENSOR FAULT IMPROBABLE
Workshop case study — full write-up.
2014 Hyundai Veloster – Start and Stall, Cold or after sitting for 2 hours – P0340 intake cam shaft position ‘circuit fault’
Workshop case study — full write-up.
Hyundai Elantra – Check Engine Light and EPS Light – C1201 Wheel Speed Sensor LH Range/Performance
Workshop case study — full write-up.
AH Astra P2120 & Stalling Z18XER
Workshop case study — full write-up.
Alfa Romeo 156 2.0 Twin Spark surging idle
Workshop case study — full write-up.
Audi Q5 2012 – CGLA 2.0L TDI – P0121 Throttle/pedal pos.sensor A circuit Range/performance.
Workshop case study — full write-up.
Honda Accord Euro 2012 – Window Relearn procedure
Workshop case study — full write-up.
BA Falcon P and D light flashing — auto faults
Workshop case study — full write-up.
Body electronics
Workshop case study — full write-up.
Toyota Prado GRJ120 A/C amplifier chase
Workshop case study — full write-up.
BMW E39 light control module (LCM)
Workshop case study — full write-up.
catalyst testing methods for internal combustion engines
Workshop case study — full write-up.
Commodore ABS part numbers
Workshop case study — full write-up.
Door lock wireless control – Hiace DTC Check / Clear
Workshop case study — full write-up.
E-scan data – Mazda BK – 2.0l
Workshop case study — full write-up.
E-scan data – Mitsubishi Lancer CY 2.0L CVT
Workshop case study — full write-up.
E-scan diesel ford territory
Workshop case study — full write-up.
T31 M9X -Nissan xtrail escan data idle
Workshop case study — full write-up.
Holden Commodore VE to VF -V8 ECU Service Numbers and OS That are OE equipped.
Workshop case study — full write-up.
Toyota Hilux 2008 2TR-FE – ECU swap
Workshop case study — full write-up.
VE COMMODORE LE0 ENGINE 2007 BRAND NEW ENGINE ECU PROGRAMMING
Workshop case study — full write-up.
VE Commodore series 1 – radio vin program – security lockout active
Workshop case study — full write-up.
XC Barina ECU Changing – Z14XE MULTEC H
Workshop case study — full write-up.
Fuse Layout – Land Rover Discovery Sport 2015-2019
Workshop case study — full write-up.
Holden Astra TS Z18XE air flow meter testing
Workshop case study — full write-up.
Holden Commodore VE – 04/2008 LEO V6 Engine – Random stalling
Workshop case study — full write-up.
Holden cruize b3902, no start
Workshop case study — full write-up.
Holden Cruze 2015 – F18D4 1.8L petrol – P0016 crankshaft position intake can not plausible
Workshop case study — full write-up.
Holden Cruze p2096 bank 1 sensor 2 lean fault
Workshop case study — full write-up.
VE v6 Auto to VE V8 Manual conversion both vehicles series 2 VE
Workshop case study — full write-up.
VT commodore DFI module wiring diagram
Workshop case study — full write-up.
Honda civic – HOW TO RESET, INITIALISE, PARK ASSIST SENSORS ON HONDA VEHICLES, STEP BY STEP.
Workshop case study — full write-up.
Protected: Hyundai i30 – Dash EEPROM
Workshop case study — full write-up.
Isuzu DPF regeneration process
Workshop case study — full write-up.
KE10 Corolla charging circuit and external regulator
Workshop case study — full write-up.
Mazda 3 BL Diesel & Nissan Navara D40 – DPF Differential Pressure Sensors, Turn out to be the same, @ 1/10th of the Cost!!
Workshop case study — full write-up.
MAZDA CX7 2009 – 2.2L DIESEL WITH DPF AND SCR CONTROL UNITS – LIVE DATA AND POSSIBLE RESETS
Workshop case study — full write-up.
Mercedes benz – 211.056 E350 Gasoline – P1856 Shift lever position detection failed.
Workshop case study — full write-up.
MITSUBISHI OUTLANDER 2004 4G64 4 CYLINDER IDLE STEPS ON IAC
Workshop case study — full write-up.
Mitsubishi Triton MK 2005 – 6G72 V6 3.0L Petrol – Miss firing
Workshop case study — full write-up.
ML320 W163 passenger seat airbag sensor
Workshop case study — full write-up.
P0431 – warm up catalyst efficiency bank 2 – Jeep Wrangler TJ 6 cylinder
Workshop case study — full write-up.
Subaru Forester electronic throttle faults P2109
Workshop case study — full write-up.
🧪 Subaru WRX Power Window Diagnostic Guide (2017 RHD)
Workshop case study — full write-up.
Toyota Hiace GDH300 Series – Front Radar sensor Calibration
Workshop case study — full write-up.
Toyota RAV4 – P0171 – system to lean bank 1
Workshop case study — full write-up.
Toyota hiace – timing belt light reset
Workshop case study — full write-up.
Toyota Hilux KUN16 – 1KD Diesel – 500,000kms later
Workshop case study — full write-up.
VE Commodore Calais, Electric Mirrors – High Series With heated mirrors and Memory function.
Workshop case study — full write-up.
Non-diagnostic workshop posts live on the Blog. Master list also on the sitemap.