Volvo All Engines (2017 Emissions) Fault Code: P048012 PID: EMS Fan 1 Control Circuit
Volvo All Engines (2017 Emissions) Fault Code: P048012 PID: EMS Fan 1 Control Circuit
Circuit description
Electronic Viscous Fan: The Electronic Fan Drive contains a solenoid that controls the flow of fluid between reservoirs in the fan drive housing and cover. The Engine Control Module (ECM) provides a (PWM) Pulse Width Modulation signal to the solenoid and controls solenoid operation to optimize fan speed, based on coolant temperature, intake air temperature and A/C load.
Conditions for diagnostic trouble code (DTC)
The voltage at pin A14.EB:49 is above normal value
Observable symptoms
Engine fan constantly engaged
High fuel consumption
Coolant temperature below normal
Low oil temperature
Probable cause
1) Connector
2) Wiring harness
3) Solenoid valve, engine fan
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