Manuals through 2025 now available!
Our trusted friends have launched a new website named LEMON, which has newer manuals. It also contains all the CHARM manuals.
LEMON is the spiritual successor to CHARM, I recommend you try it!
Link:
lemon-manuals.la or
lemon-manuals.org.ua
(Some people have issue connecting. LEMON is investigating. For now, use Firefox or change your DNS server)
Or, hide this message:
temporarily or
permanently
Vacuum Decay Test
If the weak vacuum test passes, the
PCM will command the
EVAP purge valve OFF, sealing the EVAP system. The PCM tests for vacuum decay in the EVAP system by monitoring the
Fuel Tank Pressure
(FTP) sensor for a change in voltage over a period of time. If the decay rate is more than a calibrated value, the PCM will rerun the test. If the test fails again, DTC P0442 will set.