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

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Car Speed Sensor

Car Speed Sensor
Inspection





1. Connect the vehicle speed sensor connector terminal (1) to the battery (+) terminal and terminal (2) to the battery (-) terminal.
2. Connect a resistance of 1.3k ohm to 5k ohm between terminals (1) and (3).

NOTE: Be extremely careful not to connect the battery (+) terminal to the terminal (3). This may damage the car speed sensor.

3. Rotate the shaft of the car speed sensor slowly and measure the voltage at both ends with a digital tester.
The voltage, with one rotation of shaft, fluctuates four times in the following range: 10 to 14 Volts = 2 Volts or less.
Replace the sensor when the result of inspection is found abnormal.