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

Component Inspection

Description:







VOLTAGE

NOTICE: Raise vehicle wheels clear of ground before proceeding.

1. Turn ignition to ON and use a voltmeter to back probe pin 1 of C150.
2. Have an assistant rotate one drive wheel, chocking other drive wheel, if necessary. This will rotate the vehicle speed sensor.
3. Voltmeter reading should alternate between approximately 1 and 10 volts.
4. If this requirement is not met, replace the vehicle speed sensor.