Diagnostic Trouble Code (DTC) Information ECM-4010

Condition

Fig 1: Identifying Volvo Leak Detection Pump (Leak Diagnostic Unit)

Courtesy of VOLVO CARS OF NORTH AMERICA.

The diagnostic trouble code (DTC) is stored if the control module registers that the signal from the leak diagnostic unit valve is too high when the valve is activated, or too low, or missing when the valve is deactivated.

The diagnostic trouble code (DTC) can be diagnosed when the engine has been switched off for 8 hours and is then run for 20 minutes.

Substitute Value

Leak diagnosis is blocked.

Possible Source

Signal too high

Short-circuit to supply voltage in the signal cable
Damaged valve in the leak diagnostic unit.

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
Damaged valve in the leak diagnostic unit.

Fault symptom[s]

Malfunction indicator lamp (MIL) lit.