Operation CHARM: Car repair manuals for everyone.
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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Vehicle Speed Sensor: Testing and Inspection

Vehicle Speed Sensor:





1. Remote vehicle speed sensor 2.
2. Connect (B9) connector to vehicle speed sensor 2.
3. While rotating shaft of vehicle speed sensor 2, check voltage that changing from 0 to 5 volts four times per rotation between (B9) connector terminals.

Connector & Terminal/Specified value
(B9) No.1 - No.3/O changes to 5 V (4 times/rotation)