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 logical successor to CHARM, I recommend you try it!

Link: lemon-manuals.la

Crankshaft Position Sensor: Testing and Inspection

Engine Speed Sensor (CPS):





1. Disconnect the speed sensor connector and measure the resistance between terminals "A" and "B".
2. If the resistance for a hot engine is not between 125 and 275 ohms, replace the sensor.