Diagnostic trouble code (DTC) information ECM-6100

Condition

Fig 1: Identifying Electronic Control Module

Courtesy of VOLVO CARS OF NORTH AMERICA.

Diagnostic Trouble Code (DTC) ECM-6100 is stored in the engine control module (ECM) if the engine cooling fan (FC) control module registers that the fan blades are obstructed or that there is no power supply. The diagnostic trouble code (DTC) is also stored if an internal fault in the engine cooling fan (FC) control module is registered. The diagnostic trouble code (DTC) is diagnosed when the engine is idling.

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

Engine cooling fan (FC) switched off.

Possible Source

Signal too low:

Contact resistance or oxidation in the connectors
Supply voltage missing to the engine cooling fan (FC) control module
Open-circuit or short-circuit to ground in the wiring
Defective engine fan control module.

Signal too high:

Obstructed fan blade
Defective engine fan control module.

Signal missing:

Defective engine fan control module.

Faulty signal:

Defective engine fan control module.

Fault symptom[s]

Overheating engine.
Electric cooling fan does not operate