Diagnostic Trouble Code (DTC) Information ECM-4030
Condition
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) registers that the signal is too high, too low or missing.
The diagnostic trouble code (DTC) can be diagnosed when the leak diagnostic system is run.
Substitute Value
None.
Possible Source
Signal too high
- Short-circuit to ground in the signal cable
- Damaged leak diagnostic pump.
Signal too low
- Short-circuit to supply voltage in the signal cable
- Damaged leak diagnostic pump.
Signal missing
- Open-circuit in the signal cable
- Damaged leak diagnostic pump.
Fault symptom[s]
- None.