Author Question: Technician A says that the purpose of the IAT sensor is to provide the engine computer (PCM) with ... (Read 65 times)

HCHenry · **on:** Jun 23, 2018

Technician A says that the purpose of the IAT sensor is to provide the engine computer (PCM) with the temperature of the air entering the engine. Technician B says that the IAT sensor information is used for fuel control (adding or subtracting fuel) and spark timing, depending on the temperature of incoming air. Who is right?

A) Technician A only B) Technician B only
C) Both technicians A and B D) Neither technician A nor B

Question 2

The IAT is being tested. After the vehicle has been allowed to cool for several hours, a scan tool is used to observe the IAT, and compare it to the engine coolant temperature (ECT). The two temperatures should be within how many degrees F of each other:

A) 10 B) 25 C) 5 D) 15