Diagnostic Aids

Scan tester displays APP No. 3 position in volts, and should display 4 volts with throttle closed and ignition on or engine at idle. Voltage should decrease at a steady rate as throttle is moved toward WOT. Also, 90 percent pedal travel is acceptable for correct APP operation.

Monitor APP No. 3 sensor while applying accelerator pedal with engine off and ignition on. Display should vary from about 4 volts with throttle closed, to about 2 volts with throttle at WOT.

Fig 1: DTC 63 Schematic ("G" Series) Accelerator Pedal Position (APP) No. 3 Circuit High (Models With PCM)

Fig 2: DTC 63 Schematic ("P" Series) Accelerator Pedal Position (APP) No. 3 Circuit High (Models With PCM)

Fig 3: DTC 63 Flow Chart (All Models) Accelerator Pedal Position (APP) No. 3 Circuit High (Models With PCM)