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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Reference Sensor
Fig. 11 Speed sensor/Reference sensor:
This sensor is located in the bellhousing next to the
engine speed sensor. It supplies the ECU with crankshaft position information. Once the ECU has determined the optimum timing advance (through the various sensors), it uses this position information to actually fire the ignition.*
* See "IGNITION SYSTEMS" section for testing procedures and specifications.
