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Home >> Geo >> 1996 >> Prizm Base, Automatic >> Repair and Diagnosis >> Engine Performance >> System >> Engine Controls - System/Component Tests 1.6 & 1.8L >> Idle Control System >> A/C Idle-Up Circuit Check >> Equipped With A/C)

Equipped With A/C)

A/C amplifier sends an idle-up signal to PCM when A/C compressor clutch is in operation. PCM uses this information to adjust mixture and engine idle speed. To check A/C idle-up circuit, refer to testing procedures for DTC P0505. See TESTS W/CODES article.