Generic
Type:
    Powertrain - Auxiliary Emission Controls - ISO/SAE Controlled
Description:
    Fan 1 Control Circuit

GM
Type:
    Powertrain - Auxiliary Emission Controls - ISO/SAE Controlled
Description:
    Cooling Fan Relay 1 Control Circuit Conditions
Cause:
    Key on or engine running, ECT sensor input less than 199°F, then the PCM detected a low voltage condition on the Cooling Fan Relay 1 control terminal, condition met for 5 seconds