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Home >> Cadillac >> 2001 >> DeVille Base >> Repair and Diagnosis >> Suspension >> Electronic Suspension >> Electronic Suspension - CV Road Sensing >> Diagnostic Tests >> DTC C0657 Or C0658: Level Control Compressor Circuit Malfunction >> Diagnostic Aids

Diagnostic Aids

This fault condition is detectable only when ALC compressor relay output is commanded to the off state. The suspension control module expects to see 12 volts with ALC system in the off state. Check ALC system. See AUTOMATIC LEVEL CONTROL WITH CVRSS article.

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