Diagnostic trouble code (DTC) information

WARNING: This page is about a different car, the 2004 Volvo S40, 2003 Volvo S40, 2002 Volvo S40, 2001 Volvo S40, and 2000 Volvo S40. However, it is still accessible from the selected car via links, so may be relevant.

Condition

Diagnostic trouble code (DTC) ECM-87 is stored if the control signal circuit for the cooling fan high speed is short-circuited to ground / voltage or if 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.