Diagnostic Trouble Code (DTC) Information ECM-431C

Condition 

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

Courtesy of VOLVO CARS CORPORATION

The engine control module (ECM) checks the control signal to the heater element in the leak diagnostic unit.

The diagnostic trouble code (DTC) is stored if the engine control module (ECM) detects that the signal is too high.

The diagnostic trouble code (DTC) can be diagnosed when the leak diagnostic system is run.

Substitute Value 

None.

Possible Source 

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

Fault symptom[s] 

• None.