Compressor Clutch Does Not Engage

HVAC Compressor Clutch Does Not Engage

Test Description

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2. These DTCs cover the Low Speed Buss Line of GM LAN. This is the circuit that carries the A/C request signal.
4. The A/C compressor relay output is disabled if engine coolant temperature is above 128°C (262°F). The instrument panel engine coolant indicator will indicate overheating.