Diagnostic Trouble Code (DTC) Information

ECM-6120 ENGINE COOLING FAN RELAY, HIGH SPEED
DIAGNOSTIC TROUBLE CODE (DTC) INFORMATION




Condition
Diagnostic trouble code (DTC) BCM-6120 is stored if the control module registers that there is a short-circuit to ground/supply voltage or an open-circuit in the control signal circuit for the engine coolant fan high-speed.

Condition
Use the engine cooling fan (FC) low-speed instead of high-speed.

Possible source

Signal too high:
- short-circuit to supply voltage in the signal cable
- defective relay.

Signal too low:
- short-circuit to ground in the signal cable
- open-circuit in the signal cable
- defective relay.

Condition
None.