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.2 Speed Sensor Inspection Procedure






- Remove NO.2 vehicle speed sensor.
- Measure resistance between terminals 1 and 2 of NO.2 vehicle speed sensor.

Resistance: 560 Ohms to 680 Ohms


- Check voltage between terminals 1 and 2 of the NO.2 speed sensor when a magnet is put close to the front end of the NO.2 vehicle speed sensor then taken away quickly.

- Voltage is generated intermittenly.

Note: The voltages generated is extremely low.