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)
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temporarily or
permanently
Weak Vacuum Test
This tests for large leaks and blockages in the EVAP system. The
PCM will command the EVAP vent valve ON (close), and the
EVAP purge valve ON (open) with the engine running, allowing engine vacuum into the EVAP system. The PCM monitors the fuel tank pressure (FTP) sensor to verify that the system is able to reach and hold a predetermined level of vacuum within a set amount of time. If the PCM does not detect the predetermined vacuum level on two consecutive tests, DTC P0440 will set.