Accelerator Pedal Position Sensor

Disconnect accelerator position sensor connector. Do not confuse accelerator position sensor with throttle position sensor. Both sensors have 4-pin connectors and are mounted on throttle body. Check wire colors to help identify accelerator position sensor connector. See appropriate wiring diagram in WIRING DIAGRAMS article.
Measure resistance between terminals E2 and VC at accelerator pedal position sensor. See Fig 1. If resistance is not as specified, replace accelerator pedal position sensor. See ACCELERATOR PEDAL POSITION SENSOR RESISTANCE table.

ACCELERATOR PEDAL POSITION SENSOR RESISTANCE

Application

⁽¹⁾ Ohms

GS300 & SC300

1200-3200

GS400, LS400 & SC400

1640-3280

⁽¹⁾	With temperature at 68°F (20°C).

Fig 1: Testing Accelerator Pedal Position Sensor (Typical)