Diagnostic Trouble Code (DTC) Information

Diagnostic trouble code (DTC) information ECM-432A

Condition




The engine control module (ECM) checks the function of the pump by measuring the current through the leak diagnostic pump.
After the leading reference phase in the leak diagnostic the air flow is directed to the fuel tank system to pressurize it. In this change there is a short lowering of power consumption before pressure builds up in the tank system. A diagnostic trouble code (DTC) is stored if the engine control module (ECM) registers that the power consumption of the pump falls too slowly or not at all during this change. This is interpreted as damage to the valve in the pump.
The diagnostic trouble code (DTC) can be diagnosed when the leak diagnostic system is run.

Substitute value
- The leak diagnostic is cancelled.

Possible source
- Dirt or damp in the pump
- The pump valve has jammed
- Damaged leak diagnostic pump.

Fault symptom[s]
- Malfunction indicator lamp (MIL) lit.