IAT sensor location

Have you checked the computer for trouble codes ?
Could be a long list - pickup module, coil, ignition module, distributor, rotor, power relay, etc.

The IAT on your Jeep should be located on the intake manifold, directly behind the throttle body. It will be a screw in sensor with a two wire plug.

Ther are more than one type of speed sensor for jeeps....I am chrysler jeep tech...there are 2 speed sensors on the trans and also speed sensors at the wheels (IF IT HAS ABS)...Normally the engine speed is done by an IAC Motor...If you are meaning idle...Can you send more information....
Also you may have a vacum leak..........You have an Input speed sensor and an output speed sensor ....Do you know exactly which it is ....Both are at transmission /If 4 wheel drive see transfer case also.I have the manual at my fingertips and will be glad to assist you with any problems............................I can help................metalpoet

4.7L ENGINE CRANKSHAFT SENSOR LOCATED ON THE ENGINE BLOCK ABOVE THE STARTER. ON THE 4.0L ENGINE CRANKSHAFT SENSOR LOCATED TRANSMISSION BELL HOUSING AT THE LEFT REAR OF THE ENGINE. THE 5.2L 5.9L CRANKSHAFT SENSOR LOCATED ON THE ENGINE BLOCK BEHIND THE RIGHT CYLINDER HEAD.

Please specify the year, make and model of your vehicle to give the exact location.

The IAC motor is located on the throttle body, mounted sideways and looks like this;

Trouble Code: P0113 (4.0L L6 VIN S Auto)
IAT Sensor Circuit High Input Print this code data Number of Trips to Set Code: 1
OBD II Monitor Type: CCM Details
Indicators: MIL Details

• CCM Details

Trouble Code Conditions:
Check with ignition on or engine running; battery voltage more than 10v; The PCM detected the IAT Sensor input was over 4.90v (exc. Dakota, Durango, Ram) or 4.98v (Dakota, Durango, Ram) for 3 seconds.

Possible Causes:

• IAT Sensor signal circuit shorted to VREF (5v)
  
• IAT Sensor signal circuit is open, or the ground circuit is open
  
• IAT Sensor is damaged or it has failed (an internal open circuit)
  
• PCM has failed
  

sometimes the air temp sensor is in the mass air too.

it screws into the intake right behind the throttle body. its a gray connector with a brown and yellow and a black and red wires going to it