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The intake air temperature sensor is located on top of the intake. In a 1990 Toyota Camry the air temp sensor assures the ECU the engine is running at optimal temperature.
1990 Camry 4 cylinder thermostat is located off the bottom intake hose connected to the engine block.
It depends on which of them. The one for coolant is located in the water inlet. Ambient temperature sensor is located in the filter box.
On 4 cylinder you can find it on the side of the engine facing the firewall.
It's screwed in the side of the engine facing the firewall.
It's next to the timing belt gear. The sensor can be accessed from the the firewall side.
The Camshaft Sensor on the 5S-FE engine it located on the back of the cylinder head (facing the firewall) next to the back of the timing cover. It is fastened to the cylinder head with a 10mm bolt.
Mass air flow sensor is located in the intake pipe connecting the air filter box with the throttle body.
You can find it in the cylinder head next to the oxygen sensor harness.
It should in the air filter box or if you have a MAF sensor, the intake air temperature sensor is a part of the MAF.
Usually V6 has a MAF sensor. 4 cylinder does not have it.
The mass air flow sensor is responsible for the amount of air the engine receives. For the Toyota Camry, it is located inside the air filter box. The sensor is about the size of a cigarette box that forms a connection between the throttle body and air intake .