Diagnostic Trouble Code (DTC) Information ECM-620B

Condition 

The diagnostic trouble code (DTC) is stored in the engine control module (ECM) if the engine cooling fan control module registers that the temperature in the driver stage for the engine cooling fan control module is too high or if the fan blade is blocked.

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

Substitute Value 

• Engine cooling fan (FC) switched off.

Possible Source 

• Obstructed fan blade
• Damaged engine cooling fan (FC) control module.

Fault symptom[s] 

• Engine cooling/Engine overheats/runs hot