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 Switch: Testing and Inspection

1. Connect ohmmeter between pins 52 and 30 of ECU pin connector.
2. With accelerator at idle position, correct resistance reading is less than 1 ohm.
3. With accelerator pedal fully depressed, correct resistance reading is infinite.
4. Connect ohmmeter between pins 53 and 30 of ECU pin connector.
5. With accelerator pedal at idle position, correct resistance reading is infinite.
6. With accelerator pedal fully depressed, correct resistance reading is less than 1 ohm.