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)

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Throttle Position Sensor: Adjustments

The TPS is not adjustable. Each time the voltage drops below 1.25 volts and stops, the ECM assumes that this value is 0 throttle angle and measures percent throttle from this point on. Therefore no adjustment is necessary.

If the proper range cannot be attained, replace the sensor.