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)

Or, hide this message: temporarily or permanently

Vehicle Speed Sensor: Testing and Inspection


ANALOG METER

Speed Sensor Check (Analog Meter):






1. Connect ohmmeter between terminals B6 and B7.
2. Turn speedometer shaft and check that continuity is indicated 4 times per revolution.
3. If not as specified, replace sensor.

DIGITAL METER

Digital Speed Sensor Check: