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 NO.1 Speed Sensor Inspection Procedure





- Remove the combination meter.
- Connect an ohmmeter between terminals A and B.
- Revolve the meter shaft and check that the meter needle repeatedly deflects form 0 to infinity.




Vehicle NO.2 Speed Sensor Inspection Procedure


No. 2 Speed Sensor:






- Jack up a rear wheel on one side.
- Connect an ohmmeter between the terminals.
- Spin the wheel and check that the meter needle deflects from 0 to infinity.