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-7F is stored if the malfunction indicator lamp (MIL) circuit is short-circuited to ground / voltage or if there is an open-circuit in the circuit 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.

Signal too low:

Short-circuit to ground in the signal cable.

Signal missing:

Open-circuit in the signal cable
Damaged MIL lamp.

Fault symptom[s]

None.