EVIDENCE VAULT // TECHNICAL LOGS
Our work — real diagnostics, real repairs
Every job tells a story: the complaint, the symptoms, the diagnostic process, the fault and the fix. These technical logs show how JVS approaches vehicle problems — and they're added to regularly.
BMW // 5 Series (F10)
BMW 5 Series iDrive Screen Blank — MOST Bus Fault Found with ISTA
A BMW 5 Series with a blank iDrive screen and no audio, traced with ISTA to water ingress in the boot amplifier area; the corroded connector cleaned, wiring repaired and the amplifier tested and recoded at our Telford workshop.
MINI // Cooper S R56
MINI Cooper S R56 Battery Drain — Parasitic Draw Test & Module Replacement
A MINI Cooper S with intermittent no-start and battery drain isolated by a parasitic current-draw test to a sticking control module; the module replaced and the new battery registered and coded with ISTA so the charging system recalibrated — at our Telford workshop.
AUDI // A4 (B9)
Audi A4 AdBlue Warning & NOx Sensor Fault — ODIS Diagnosis
An Audi A4 with an AdBlue warning and engine management light plus NOx sensor fault codes, diagnosed with ODIS, the faulty NOx sensor replaced, the AdBlue dosing system reset and the car road-tested to confirm — at our Telford workshop.
VOLKSWAGEN // Tiguan
VW Tiguan DPF Blocked & Limp Mode — ODIS Soot-Load & EGR Fault
A VW Tiguan with DPF warnings and limp mode on motorway trips — soot load measured with ODIS, a forced regeneration performed, a failed EGR contribution found and fixed, and the system fully reset at our Telford workshop.
MERCEDES-BENZ // C-Class (W205)
Mercedes C-Class W205 Electrical Gremlins — CAN Bus & Dashcam Interference
A Mercedes C-Class W205 with random dashboard faults, flickering lights and keyless issues traced with oscilloscope CAN-bus testing to interference from a poorly installed aftermarket dashcam; wiring corrected and the CAN bus verified clean — at our Telford workshop.
BMW // 320d
BMW 320d Flat Battery Every Morning — Parasitic Drain Investigation
A BMW 3 Series flattening its battery overnight, found with a systematic parasitic current-draw investigation — the cause wasn't the battery at all.
BMW // M4
BMW M4 Valvetronic Fault Diagnosis & Repair in Telford
A BMW M4 with reduced-power warnings and rough running traced to a Valvetronic fault using BMW ISTA test plans and live data analysis — diagnosed and repaired at our Telford workshop.
VOLKSWAGEN // Golf
Volkswagen Golf Intermittent Electrical Faults — CAN Bus Diagnosis
A VW Golf with random warning lights, central locking failures and dashboard errors traced to a single chafed wiring harness affecting CAN bus communication — found with ODIS and oscilloscope testing.
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