Computer/IT Applications and Digital Skills in the Trade
Domain 8 tests digital tools used in modern farm-machinery service: diagnostic scan tools, digital multimeters, spreadsheets, inventory and service records, and basic cyber-safe practice.
Core rules
- Read and record diagnostic trouble codes (DTCs) and freeze-frame data before clearing anything.
- A scan tool shows sensor data; it does not prove the sensor is faulty. Check wiring, supply voltage, ground and mechanical causes.
- Spreadsheets use formulas such as =SUM(B2:B10) and =B2*C2; absolute references ($B$2) stop a cell changing when copied.
- Name files consistently (machine, job number, date), back up service records, and do not open unknown attachments on a workshop PC.
- A digital multimeter must be set to the correct function and range; measure voltage in parallel and current in series.
Worked example
A tractor logs P0087 (fuel rail pressure too low). Freeze frame shows rail pressure 180 bar at 1,800 rpm when 700 bar is expected. Reason: first check fuel level and filter restriction, then lift-pump delivery and rail-pressure sensor wiring; do not replace the high-pressure pump on the code alone. Record the freeze-frame values, perform the pressure test, and clear the code only after the repair and a road/test run.
Traps
Clearing codes before recording; using a multimeter on the wrong range; assuming a DTC names the failed part; storing customer data on a personal phone without consent.