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
Catalyst Test Time Difference EWMA
The display shows seconds from
-25.6 to
+25.5. This display indicates the Oxygen Storage content of the exhaust catalyst. With a properly operating exhaust catalyst the Catalyst Test Time Difference EWMA should always be less than the Catalyst Test Fail Threshold. Although comparing this display to the Catalyst Test Fail Threshold may aid in determining if a catalyst is failing always allow the idle catalyst test (DTC P0420) to Pass or Fail a
catalytic converter.