Diagnostic Trouble Code (DTC) Information

Diagnostic trouble code (DTC) information ECM-680B

Condition




The engine control module (ECM) checks the circuit from the engine cooling fan (FC) to the control module box.
The diagnostic trouble code (DTC) is stored if the engine control module (ECM) detects that the signal for the engine cooling fan (FC) to the control module box is missing.
The diagnostic trouble code (DTC) can be diagnosed at ignition on or when the engine is running.

Substitute value
- None.

Possible source
- Contact resistance in the terminals
- Open-circuit in the signal cable
- Open-circuit in the power supply to the engine cooling fan (FC)
- Damaged engine cooling fan (FC).

Fault symptom[s]
- Malfunction indicator lamp (MIL) lit.