P0121

DTC P0121 THROTTLE POSITION CIRCUIT RANGE/PERFORMANCE PROBLEM





WIRING DIAGRAM





DETECTING CONDITION

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.

1) Turn ignition switch OFF. Clear DTC with ignition switch ON, check vehicle and environmental condition for:
- Indication of fuel level meter in combination meter: 1/4 or more
- Altitude (barometric pressure): 2400m, 8000ft or less (560mmHg, 75kPa or more)
- Ambient temp.: 10°C, 14°F or higher
- Intake air temp.: 70°C, 158°F or lower
- Engine coolant temp.: 70 - 110°C, 158 - 230°F
2) Warm up engine to normal operating temperature.
3) Increase vehicle speed to 30-40mph, 50-60km/h in 3rd gear or "D" range and hold throttle valve at that opening position for 1 min.
4) Stop vehicle.
5) Check DTC in "DTC" mode and pending DTC in "ON BOARD TEST" or "PENDING DTC" mode.

Testing Procedure:

Fig. 1:

Fig. 2:

Fig. 3:

Fig. 4:

INSPECTION