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Home >> Chevrolet >> 1997 >> Astro Van Cargo, AWD >> Repair and Diagnosis >> Engine Performance >> System >> Engine Controls - System & Component Testing 4.3L >> Miscellaneous Pcm/VCM Controls >> A/C Compressor Clutch Controls
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A/C Compressor Clutch Controls

The A/C compressor clutch relay is controlled by the PCM. The PCM improves idle quality by delaying A/C compressor clutch engagement until idle speed is increased, or disengages A/C compressor clutch when idle speed is too low. A/C compressor clutch is cycled by PCM. PCM smooths cycling of A/C compressor clutch by adding fuel the instant A/C compressor clutch is applied.

NOTE: See the WIRING DIAGRAMS article for component location, terminal and wire color identification.
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