Diagnostic Trouble Code (DTC) Information

ECM-6120 ENGINE COOLING FAN RELAY, FAULTY SIGNAL
DIAGNOSTIC TROUBLE CODE (DTC) INFORMATION




Condition
Diagnostic trouble code (DTC) ECM-6120 is stored if the engine control module (ECM) registers a fault in the signal cable from the engine cooling fan (FC) relay.

Condition
- none

Possible source

Signal too high:
- short-circuit to supply voltage in the signal cable
- defective engine cooling fan (FC) relay

Signal too low:
- short-circuit to ground in the signal cable
- power supply cable short-circuited to ground
- defective engine cooling fan (FC) relay

Signal missing:
- open-circuit in signal cable
- defective engine cooling fan (FC) relay

Condition
- engine cooling fan (FC) running continuously even when the ignition is switched off