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: Description and Operation
Vehicle Speed Sensor Circuit:
Location The
speed sensor is located in the speedometer head.
Operation The
vehicle speed sensor uses a magnetic reed type switch. As the speedometer cable turns, the switch turns on and off (opening and closing the circuit). The ECU senses the speed at which this happens as the vehicle speed.