When Monitored
WARNING: This page is about a different car, the 2025 Jeep Grand Cherokee. However, it is still accessible from the selected car via links, so may be relevant.
This diagnostic runs once after each ignition off cycle during the Leak Check Diagnostic when the following conditions are true:
- Ignition off time more that 6 hours.
- Ambient temperature between approximately 4°C (40°F) and 35°C (95°F).
- Battery voltage above 11.0 volts.
- Vehicle is not in a refueling event.
- At the end of the leak check diagnostic, after the second 0.020" Reference Orifice Check is performed, the ELCM Vacuum Pump is turned off. The system pressure is expected to increase back to atmospheric pressure within a calibrated period of time.