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Home >> GMC >> 1997 >> Forward Control 7.4 J >> Repair and Diagnosis >> External Pages >> Different variant/trim >> Section 9 (Engine Controls - System/Component Tests - 6.5L (P Series)) >> Miscellaneous Pcm Controls >> A/C Compressor Clutch Controls

A/C Compressor Clutch Controls

WARNING: This page is about a different variant/trim than selected.

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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