Diagnostic Trouble Code (DTC) Information ECM-433C

Condition 

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

Courtesy of VOLVO CARS CORPORATION

The diagnostic trouble code (DTC) is stored if the engine control module (ECM) registers that the signal from the pump for the leak diagnostic unit is too high.

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

Substitute Value 

The leak diagnostic is disabled.

Possible Source 

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

Fault symptom[s] 

• Malfunction indicator lamp (MIL) lit.