1204F - DEF System Supplement
1.2 Terminology
• SCR Selective Catalytic Reduction
• CDPF Catalysed Diesel Particulate Filter
• DEF Diesel Exhaust Fluid
• PETU Pump Electronic Tank Unit
• PEU Pump Electronic Unit
• DCU Dosing Control Unit
• ULSD Ultra Low Sulphur Diesel
• OEM Original Equipment Manufacturer
• CDV Coolant Diverter Valve
A&I manual Publication TPD 1832 – Production issue 3. Page 6 of 41
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