Diagnostic trouble code (DTC) information
Condition
Diagnostic trouble code (DTC) ECM-4024 is stored if the control module registers that the signal from the leak diagnostic unit pump is too high, too low or missing.
Substitute Value
The leak diagnostic is shut off.
Possible Source
Signal too high:
- Short-circuit to supply voltage in the signal cable
- Defective pump.
Signal too low:
- Short-circuit to ground in the signal cable.
Signal missing:
- Contact resistance in the terminals
- Open-circuit in the signal cable
- Open-circuit in the power cable
- Defective pump.
Fault symptom[s]
- Malfunction indicator lamp (MIL) lit.