Diagnostic trouble code (DTC) information

Condition

Fig 1: Identifying Leak Diagnostic Pump

Courtesy of VOLVO CARS OF NORTH AMERICA.

Diagnostic trouble code (DTC) ECM-4010 is stored if the control module registers that the signal from the leak diagnostic pump valve is too high when the valve is activated or too low or missing when the valve is deactivated.

The control module diagnoses the fault when the engine has been off for 8 hours and is then driven for 20 minutes.

Substitute Value

Leak diagnosis is blocked.

Possible Source

Signal too high:

Short-circuit to supply voltage in the signal cable
Defective valve.

Signal too low:

Short-circuit to ground in the signal cable.

Signal missing:

Contact resistance in the terminals
Open-circuit in the signal cable
Open-circuit in the power cable
Defective valve.

Fault symptom[s]

Malfunction indicator lamp (MIL) lit.