DTC 65 - App No. 3 Circuit Range Fault: Notes

The Accelerator Pedal Position (APP) module provides a voltage signal that changes relative to accelerator position. There are 3 sensors located within the APP module that are scaled differently. DTC 65 will set when the PCM has recognized a skewed (mis-scaled) sensor. The PCM compares all 3 sensors to each other and determines if there is a 6 percent difference between APP No. 1 and APP No. 2, and a 10 percent difference to APP No. 3.

PCM will default to the input from the APP No. 3 sensor being ignored. A current and history DTC will set but will not turn on the SERVICE THROTTLE SOON light. The throttle will operate normally as long as there is only one sensor malfunctioning. If 2 different APP sensors have a malfunction, the SERVICE THROTTLE SOON light will light and the PCM will limit power. If 3 APP sensors malfunction, the SERVICE THROTTLE SOON light will light and the PCM will only allow the engine to operate at idle.

NOTE: Test numbers refer to numbers on diagnostic chart.

This step determines if a good 5-volt reference is present.
This step checks for an open in the ground circuit.