How to Replace an IAC on Jeep Cherokee

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On a Jeep Cherokee the IAC, or Idle Air Control Valve, controls the idle speed of the engine. The IAC receives an input signal from the vehicle's computer and contains a small electric motor that moves a plunger in and out of the air control passage. This ability to restrict air flowing through the air control passage sets the speed at which the engine idles.

How to Replace an IAC on Jeep Cherokee
(Jason Grzeskowiak/Demand Media)

Things You'll Need

  • Phillips screwdriver
  • Flat blade screwdriver
  • Socket set
Step 1

Disconnect the ground cable from the negative battery terminal by loosening the clamp and lifting it off the negative battery terminal.

Jason Grzeskowiak/Demand Media
Step 2

Separate the air intake duct from the throttle body by loosening the retaining clamp and carefully pulling the duct away from the throttle body.

Jason Grzeskowiak/Demand Media
Step 3

Locate the Idle Air Control Valve (IAC). It will be located on the back of the throttle body.

Jason Grzeskowiak/Demand Media
Step 4

Remove the electrical connector from the IAC.

Jason Grzeskowiak/Demand Media
Step 5

Remove the two screws that secure the IAC to the throttle body.

Jason Grzeskowiak/Demand Media
Step 6

Carefully pull the IAC from the throttle body.

Jason Grzeskowiak/Demand Media
Step 1

Carefully slide the IAC into position in the throttle body.

Jason Grzeskowiak/Demand Media
Step 2

Reinstall the two screws that secure it in place.

Jason Grzeskowiak/Demand Media
Step 3

Reconnect the electrical connector to the IAC.

Jason Grzeskowiak/Demand Media
Step 4

Slide the air intake duct onto the throttle body, and reinstall the retaining clamp.

Jason Grzeskowiak/Demand Media
Step 5

Reconnect the ground cable to the negative battery terminal.

Jason Grzeskowiak/Demand Media
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