P0121
DTC P0121: Throttle Position Sensor Circuit PerformanceWiring Diagram:
Wiring Diagram
DTC Detecting Condition and Trouble Area
DTC Confirmation Procedure
WARNING:
- When performing a road test, select a place where there is no traffic or possibility of a traffic accident and be very careful during testing to avoid occurrence of an accident.
- Road test should be carried out with 2 persons, a driver and a tester, on a level road.
NOTE: Check to make sure that the following conditions are satisfied when using this "DTC Confirmation Procedure".
- Intake air temp.: -8 degrees C (18 degrees F) or higher
- Engine coolant temp.: -8 - 110 degrees C (18 - 230 degrees F)
- Altitude (barometric pressure): 2400 m, 8000 ft or less (560 mmHg (75 kPa) or more)
1. Connect scan tool to DLC with ignition switch turned OFF.
2. Turn ON ignition switch and clear DTC, pending DTC and freeze frame data by using scan tool and start engine.
3. Increase vehicle speed to 60 km/h (40 mph).
4. Keep driving above vehicle speed for 5 min. (Change of vehicle speed is permitted in this step).
5. Stop vehicle and run engine at idle speed for 1 min.
6. Increase vehicle speed till engine speed is reached 2,000 - 3,000 r/min. in proper gear.
7. Keep driving at that engine speed for 1 min. or more (Engine speed is kept constant in this step).
8. Stop vehicle.
9. Repeat Steps 6) to 8).
10. Check pending DTC by using scan tool.
Step 1 - 4:
Step 4 (Continued) - 5:
Step 5 (Continued) - 6:
DTC Troubleshooting