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Home >> Buick >> 2000 >> Century Custom >> Repair and Diagnosis >> Engine Performance >> System >> Engine Control System - Testing & Engine Component Testing >> Miscellaneous Controls >> A/C Compressor Clutch Controls (1.9L) >> Compressor Over-Speed Protection
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Compressor Over-Speed Protection

PCM will de-energize A/C compressor clutch relay when engine speed is greater than 6375 RPM. PCM will energize A/C compressor clutch relay when engine speed is less than 4500 RPM for 2 seconds.