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Volvo
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2000
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S40 L4-1.9L Turbo VIN 25 B4204T2
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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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Component Tests and General Diagnostics
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Checking Rheostat
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Fault-Tracing Information
Fault-Tracing Information
Fault-tracing information
Condition
Possible source
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Open-circuit in power supply from the rheostat to the ECC control module.
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Fault in rheostat module.
Fault symptom[s]
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ECC control module lights do not light up.