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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10-Step B, Throttle Position Sensor


1. Disconnect automatic idle speed motor at throttle body, then connect a voltmeter between connector terminal with orange/dark blue wire and ground.
2. Place ignition switch in the Run position.
3. If reading is 1/2 to 1 1/2 volts, replace fuel injector.
4. If reading is more than 1 1/2 volts, replace throttle position sensor.