Diagnostic Trouble Code (DTC) Information ECM-4024

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 engine control module (ECM) registers that the signal from the leak diagnostic pump unit is too high, too low or missing.

The diagnostic trouble code (DTC) can be diagnosed when the ignition is switched on.

Substitute Value

The leak diagnostic is disabled.

Possible Source

Signal too high

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

Fault symptom[s]

Malfunction indicator lamp (MIL) lit.