Fans Are Turned On/Off By Other Sensor.....Coolant Temp Sensor Is For ECU...
Get IAT Sensor...Its Easily Available
VSS .....You Need To Feed ECU With Speed Pulse In Order To get ECU Known How Much Fast You Are Going So Speed Cut Can Be Applied....You Need Ae101 Type Speedo Which runs From Speed Sensor And Then Pulse Got Generate From That Feed Into ECU...Or Do Some Trick And Get That Pulse Out Of Your Current Speedo....
W/o That.....ECU Will Throw CEL And Might Not Perform Well...!
12.5km/L Is Quiet OK But With All Sensor Working ....It Will Be running Much More Better