FieldNotes

Real-World Diagnostic
Notes & Quick Tips

Lessons learned from the field — actual problems encountered, root causes identified, and solutions applied on Vincek d.o.o. fleet vehicles. Each note includes diagnostic reasoning, tools used, and prevention advice.

Total Notes

Critical Issues

Quick Tips

Real-World Diagnostic
Notes & Quick Tips

Intermittent charging fault — corroded B+ fusible link

HVAC compressor clutch not engaging — low refrigerant + faulty pressure switch

Air brake — slow pressure build-up after overnight park

Cummins X11 — DPF regen not completing, derate active

MAN D2676 — EVB exhaust brake weak, no engine braking

Quick tip: Ground strap corrosion causing phantom electrical faults

Quick tip: Common rail pressure sensor — clean before replacing

Real-World DiagnosticNotes & Quick Tips

Intermittent charging fault — corroded B+ fusible link

HVAC compressor clutch not engaging — low refrigerant + faulty pressure switch

Air brake — slow pressure build-up after overnight park

Cummins X11 — DPF regen not completing, derate active

MAN D2676 — EVB exhaust brake weak, no engine braking

Quick tip: Ground strap corrosion causing phantom electrical faults

Quick tip: Common rail pressure sensor — clean before replacing

Real-World Diagnostic
Notes & Quick Tips