Throttle Position Sensor (TPS)

TPS monitors throttle plate opening. Its signal to ECA is proportional to opening angle. It is mounted on throttle body, at throttle plate rod. TPS signal affects A/C cut-off, air/fuel ratio, injector timing, idle speed, ignition timing, EGR flow (except 1.8L), fuel pressure and purge flow (1.8L). If a malfunction is detected in TPS system, a code will be set in ECA memory.