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MULTIPORT FUEL INJECTION (MFI) DIAGNOSIS MULTIPORT FUEL INJECTION (MFI) 13A-344 DTC P0306: Cylinder 6 Misfire Detected . TECHNICAL DESCRIPTION • If a misfire occurs while the engine is running, the engine speed changes for an instant. • The ECU checks for such changes in engine speed. . DTC SET CONDITIONS Check Conditions • Engine speed is beween idle and 6200 r/min. • Engine torque is above 0. • Engine speed during start is above 530 r/min. • Ignition counter (starts when engine speed 530 r/min is exceeded) is above 6. • Torque intervention by traction control is not active. • Safety fuel cut off is not active. • A/C compressor switching is not active. <M/T> • Clutch pedal is not pressed. <M/T>. Judgement Criteria (change in the angular accel- eration of the crankshaft is used for misfire • MIL activated after 2 drive cycles. • No Limp home. • If MIL "blinks" in 1 Hz frequency, then there has been possible catalyst damage caused by the . EOBD DRIVE CYCLE PATTERN Refer to Diagnostic Function − EOBD Drive Cycle − . . TROUBLESHOOTING HINTS (The most • Ignition system related part(s) failed. • Low compression pressure. • Refer to component locations GROUP- • Refer to configuration diagrams GROUP- • Refer to circuit diagrams GROUP- DIAGNOSIS STEP 1. Check the No.6 cylinder ignition coil spark. ignition coil. (3) Ground the No.6 cylinder spark plug side electrode securely. • When the engine is cranked, the spark plug should spark. Q: Did it spark? YES : Go to Step 3. AKX00432 SPARK PLUG AB |