DTC 17: Throttle Position Sensor and Idle Position Signal System <A/T>

CIRCUIT OPERATION
The throttle position sensor signal is sent to the auto-cruise control-ECU through this circuit. The auto-cruise control-ECU receives a signal from the throttle position sensor at terminal 1. The signal is OFF when the accelerator pedal is depressed, and ON when the accelerator pedal is released. The throttle position sensor sends a voltage signal to terminal 1 of the auto-cruise control-ECU. The voltage depends on throttle opening angle.
DTC SET CONDITIONS
If 2.5 volts or more 0.2 volts or less is set for four seconds or more.
TROUBLESHOOTING HINTS
The most likely causes for this code to be set are:
Malfunction of the throttle position sensor.
Damaged harness or connector.
Malfunction of the auto-cruise control-ECU.
Malfunction of the PCM.