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MULTIPORT FUEL INJECTION (MFI) DIAGNOSIS TSB Revision MULTIPORT FUEL INJECTION (MFI) <2.4L ENGINE> 13A-167 STEP 9. Using the oscilloscope, check the injector. B-02 <No.2 cylinder> or B-05 <No.3 cylinder> or B-06 (2) Connect the oscilloscope probe to the injector side connector terminal 2. NOTE: When measuring with the ECM or PCM side . • ECM terminal 1 or PCM terminal 1 when checking No.1 • ECM terminal 14 or PCM terminal 9 when checking • ECM terminal 2 or PCM terminal 24 when checking • ECM terminal 15 or PCM terminal 2 when checking (3) Start the engine and run at idle. • The waveform should show a normal pattern similar to (5) Turn the ignition switch to the "LOCK" (OFF) position. Q: Is the waveform normal? YES : It can be assumed that this malfunction is intermittent. Refer to GROUP 00, How to Use Troubleshooting/ NO : Replace the ECM or PCM. Then go to Step 10. STEP 10. Test the OBD-II drive cycle. Procedure 6 − Other Monitor ( ). (2) Check the diagnostic trouble code (DTC). Q: Is the DTC P0201, P0202, P0203, P0204 is output? YES : Retry the troubleshooting. DTC P0300: Random Misfire Detected Random Misfire Circuit • Refer to, DTC P0201_P0204 Injector Circuit ). CIRCUIT OPERATION • Refer to, DTC P0201_P0204 Injector Circuit ). TECHNICAL DESCRIPTION • If a misfire occurs while the engine is running, the • The ECM <M/T> or PCM <A/T> checks for such DTC SET CONDITIONS Check Conditions • Engine speed is between 500 and 6,000 r/min. AK000587 OSCILLOSCOPE OSCILLO SCOPE PROBE 1 2 AB INJECTOR AKX01557 AB A NORMAL WAVEFORM A:INJECTOR DRIVE TIME |