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
Diagnostic Request
The diagnostic request input is received from the data link connector
(DLC) connector. When this line is grounded, the
PCM will output fault codes, if any exist. If there are no codes set, the PCM will flash a DTC 12.