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
Engine Speed (Hardwired and CCD Broadcast)
The
TCM uses both direct engine speed input from the
Crankshaft Position Sensor or
distributor, as well as calculated engine speed input from the
PCM over the
CCD Bus. The direct input is required to provide immediate information for use by the TCM control logic. The
CCD engine speed data is used by the TCM fail-safe logic to confirm that the direct engine speed data is valid.