Tracker 4WD L4-1.6L VIN 6 (1998)
Throttle Body: Description and Operation
Throttle Body
The throttle body consists of the main bore, the air bypass passage, the vacuum passage (2) (for Exhaust Gas Recirculation [EGR] system), and the
following parts:
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A throttle valve (3) which is interlocked with the accelerator cable and controls the amount of intake air.
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A fast idle air valve (4) which supplies the bypass air when the engine is cold.
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An idle speed adjusting screw (2)which controls the amount of bypass air necessary to adjust idle air control duty (engine idle speed).
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A Throttle Position (TP) sensor which detects the throttle valve opening and sends a signal to the PCM.