Component Placement Volvo Bus Corporation See also, 300, Component placement, Description, Design and function The reader is advised that printed copies are uncontrolled. 23 Component Description Placement Component appearance and associated adapter Symbol explanations 1 R905 Heater suction hose (SCR) Between SCR control unit and AdBlue-tank Fig. R906 Heater pressure hose (SCR) Between SCR control unit and injector Fig. R907 Termination resistor SAE J1939 1 – A Fig. R908 Heater return hose to tank (SCR) Between SCR control unit and injector Fig. R909 Heated filter 12 – A6x2 Fig. 9 – A 4x2 R910 Heater return hose to pump Between SCR control unit and AdBlue-tank Fig.
S01 Light switch, lighting 1 – A Fig. S02 Stalk direction indicators 1 – A Fig. S06 Stalk windscreen wiper 1 – A Fig. S07 Switch, engine brake 1 – A Fig. S08 Switch differential lock rear wheels 1 – A Fig. S12 Main switch 1 – A Fig. S14A Switch horn 1 – A Fig.