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: Testing and Inspection


Throttle Position Sensor Inspection:




Throttle Position Sensor Resistance Check:





1. Disconnect throttle sensor connector.
2. Using an ohm meter, check resistance across sensor terminals 2 and 3 changes while opening throttle valve manually.
3. Resistance value should change smoothly, without any glitches.
4. Replace sensor if it fails the above test.