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

CIRCUIT OPERATION
The throttle position sensor signal and idle position signal are sent to the auto-cruise control-ECU through this circuit. The throttle position sensor sends a voltage signal to terminal 1 of the auto-cruise control-ECU. The voltage depends on throttle opening angle. The auto-cruise control-ECU receives an idle position signal from the ECM at terminal 2. The signal is OFF when the accelerator pedal is depressed, and ON when the accelerator pedal is released.
DTC SET CONDITIONS
The Idle position signal is ON and the throttle position sensor voltage is 2.5 volts or more for four seconds or more.
The Idle position signal is OFF and the throttle position sensor voltage is 0.2 volt or less 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 ECM.