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GS430 & LS430

Disconnect Throttle Position (TP) sensor 4-pin connector. See Fig 1. Measure resistance between terminals VC and ETA at TP sensor. Resistance should be 1250-2350 ohms at 68° F (20° C). If resistance is not 1250-2350 ohms, replace TP sensor.

Fig 1: Testing Throttle Position Sensor (GS430 & LS430)
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