Diagnostic Trouble Code (DTC) Information

Diagnostic trouble code (DTC) information ECM-4320

Condition




The engine control module (ECM) checks the control signal to the reset valve in the leak diagnostic pump.
The diagnostic trouble code (DTC) is stored if the engine control module (ECM) registers a fault in the control signal to the reset valve in the leak diagnostic pump.
The diagnostic trouble code (DTC) can be diagnosed when the ignition is switched on.

Substitute value
- The leak diagnostic is cancelled.

Possible source

Signal too high
- Short-circuit to supply voltage in the signal cable
- Damaged leak diagnostic pump.

Signal too low
- Short-circuit to ground in the signal cable
- Open-circuit in the signal cable
- Damaged leak diagnostic pump.

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