P0303

DTC P0303 CYLINDER3 MISFIRE DETECTED





WIRING DIAGRAM

CIRCUIT DESCRIPTION
ECM measures the angle speed of the crankshaft based on the pulse signal from the CKP sensor and CMP sensor for each cylinder. If it detects a large change in the angle speed of the crankshaft, it concludes occurrence of a misfire. When the number of misfire is counted by the ECM beyond the DTC detecting condition, it determines the cylinder where the misfire occurred and outputs it as DTC.





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.

NOTE: Check to make sure that following conditions are satisfied when using this DTC CONFIRMATION PROCEDURE.
- Intake air temp. or intake air temp. at start: higher than -7°C (19°F)
- Engine coolant temp. at start: higher than -7°C (19°F)
- Atmospheric pressure: higher than 570 mmHg (Altitude: lower than 2360 m (7740 ft))
- Fuel level : higher than 15% (1/4, fuel level meter indication)





TROUBLESHOOTING