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 Inspection

THROTTLE POSITION SENSOR SIGNAL
1. Turn the ignition switch ON. Do not start the engine.




2. Connect a voltmeter to terminals TT and E1.




3. While slowly depressing the accelerator pedal, check that TT terminal voltage rises sequence.
If the voltage does not change in proportion to the throttle opening angle, there is a malfunction in the throttle position sensor or circuit.