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MULTIPORT FUEL INJECTION (MFI) DIAGNOSIS MULTIPORT FUEL INJECTION (MFI) 13A-316 STEP 9. Using the oscilloscope, check the No. 6 cylinder connect the test harness special tool (MB991658) between (2) Connect the oscilloscope probe to the injector side connector terminal No. 2. NOTE: When measuring with the ECU side connector, dis- (3) Start the engine and run at idle. (4) Measure the waveform. • The waveform should show a normal pattern similar to the illustration. (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 − How to Cope with Intermittent Malfunctions . NO : Replace the ECU. Then go to Step 10. STEP 10. Test the EOBD drive cycle. Diagnostic Function − EOBD Drive Cycle − (2) Check the diagnostic trouble code (DTC). Q: Is DTC P0206 set? YES : Retry the troubleshooting. AK303116 M 1 2 CONNECTOR: B-26 B-26 (GR) HARNESS CONNECTOR: COMPONENT SIDE AB AK302166 1 2 INJECTOR CONNECTOR MB991658 OSCILLOSCOPE AB AKX01557 AB A NORMAL WAVEFORM A:INJECTOR DRIVE TIME |