Outside temp sensor

sexynips

Active Member
Dec 20, 2009
72
0
Does anyone know if the engine control unit uses the outside temp reading for it's calculations?
 

mark smith

"take it or leave it !"
Oct 28, 2007
72
10
westbury !
i think the M.A.F sensor (mass air flow) sees the intate air temp and adjustments are made from there, (some have a I.A.T (intake air temp) built in with the M.A.F.
 

Muttley

Catch that diesel!
Mar 17, 2006
4,987
31
North Kent
The MAF measures air mass, which is independant of temperature.

On a turbocharged engine, the intake air temperature is measured after the intercooler by a sensor combined with the intake air pressure sensor.

On normally aspirated engines the intake air temperature sensor is often combined with the MAF or the pressure sender.

Outside air temperature is not a parameter needed by the ECU. It is used by the air conditioning system.
 
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