5. DTC: P0122, Throttle Position Sensor Circuit Voltage Too Low (see Table 1-18) Table 1-18 6. DTC: P0123, Throttle Position Sensor Circuit Voltage Too High (see Table 1-19) Table 1-19 48 S/N Operation Test Results Actions 1 Connect the diagnostic instrument and adapter, and turn the ignition switch to ON. Next step 2 Check the “throttle absolute openning” as per the data flow. Does it within 4%-10% (related to vehicle model)? Yes Next step No Go to step 5 3 Step on the accelerator, and check the “throttle absolute openning” as per the data flow. Does it increase to about 85-95% with the widening of the throttle opening (related to vehicle model)?
Yes Next step No Go to step 5 4 Repeat step 3, and check the “throttle absolute openning” as per the data flow. Does jump occur during the process? Yes Replace sensor No Next step 5 Disconnect the throttle position sensor from the harness. Check for short to ground between pin 17#, 32#, 16# of the ECU and the pin 1#, 2#, 3# of the sensor with a multimeter. Yes Repair or replace harness No Next step 6 Measure the voltage between pin 1# and pin 2# with a multimeter. Is the voltage about 5V? Yes Replace sensor No Diagnosis help S/N Operation Test Results Actions 1 Connect the diagnostic instrument and adapter, and turn the ignition switch to ON.
Next step 2 Check the “throttle absolute openning” as per the data flow. Does it within 4%-10% (related to vehicle model)? Yes Next step No Go to step 5 3 Step on the accelerator, and check the “throttle absolute openning” as per the data flow. Does it increase to about 85-95% with the widening of the throttle opening (related to vehicle model)? Yes Next step No Go to step 5 4 Repeat step 3, and check the “throttle absolute openning” as per the data flow. Does jump occur during the process? Yes Replace sensor No Next step 5 Disconnect the throttle position sensor from the harness.
Check for open circuit or short to power supply between pin 17#, 32#, 16# of the ECU and the pin 1#, 2#, 3# of the sensor with a multimeter. Yes Repair or replace harness No Next step 6 Measure the voltage between pin 1# and pin 2# with a multimeter. Is the voltage about 5V? Yes Replace sensor No Diagnosis help