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Home >> Volvo >> 2012 >> XC90 R-Design, FWD >> Repair and Diagnosis (Single Page) >> Engine Performance >> System >> Engine Control Module (ECM) Diagnostic Trouble Codes - 6 Of 13 >> ECM-620B: Engine Cooling Fan Control Module. Signal Too Low (B5254T2; 2005-2007) >> Diagnostic Trouble Code (DTC) Information ECM-620B
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Diagnostic Trouble Code (DTC) Information ECM-620B

Condition 

Fig 1: Engine Cooling Fan And Control Module
GLL140529Courtesy of VOLVO CARS CORPORATION

The engine control module (ECM) checks the function of the engine cooling fan (FC). The diagnostic trouble code (DTC) is stored if an internal fault in the engine cooling fan (FC) is registered.

The diagnostic trouble code (DTC) can be diagnosed at ignition on or when the engine is running.

NOTE:

The electric cooling fan may have a post-running time of up to approx. 6 minutes after the engine has been shut off. The time for the electric cooling fan's post-running depends on the engine's temperature, temperature in the engine compartment as well as the pressure level in the AC system.

Substitute Value 

Possible Source 

Fault symptom[s]