Diagnostic trouble code (DTC) information

Condition 

Diagnostic trouble code (DTC) ECM-85 is stored if the signal circuit for the cooling fan low speed control is short-circuited to ground, short-circuited to supply voltage or there is an open-circuit in the circuit that the control module has interpreted as a fault.

Substitute Value 

None.

Possible Source 

Signal too high: 

• Short-circuit to supply voltage in the signal cable.
• Faulty relay.

Signal too low: 

• Short-circuit to ground in the signal cable.
• Open-circuit in the signal cable.
• Faulty relay.

Fault symptom[s] 

• None.