Operation CHARM
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Cadillac
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2001
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DeVille V8-4.6L VIN Y
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Repair and Diagnosis
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Heating and Air Conditioning
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Testing and Inspection
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Symptom Related Diagnostic Procedures
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Too Cold In Vehicle
Too Cold In Vehicle
TEST DESCRIPTION
Steps 1-8:
Steps 9-16:
Steps 17-26:
2.
This test resets HVAC control module and checks for current
air temperature actuator
DTC.
8.
This checks for proper operation of coolant system to insure heater output.