GS430, LS430 & SC430
Disconnect accelerator pedal position sensor connector. Sensor is mounted above accelerator pedal. See Fig 1. Measure resistance between terminals VCP1 and EP1. Also measure resistance between VCP2 and EP2. If resistance is between 1500-6000 ohms on both circuits, accelerator pedal position sensor is okay. If resistance is not as specified, replace accelerator pedal position sensor.