Idle Mixture Adjuster Sensor (IMA)

Open No. 1 control box. Remove rivets holding IMA sensor. Disconnect IMA sensor 3P connector. Measure resistance between Brown and Green terminals (Green and Yellow terminals on CRX Si) of IMA sensor while turning adjusting screw. Resistance should be 250-6200 ohms. Replace sensor if resistance is not within specifications. See Fig 1 .

Fig 1: Testing Idle Mixture Adjuster Sens Civic CRX Si models shown