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Idle Mixture Adjuster Sensor (IMA)

Open No. 1 control box. Remove rivets holding IMA sensor. Unplug IMA sensor 3-P 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 Sensor Civic CRX Si models shown.