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MULTIPORT FUEL INJECTION(MFI) DIAGNOSIS TSB Revision MULTIPORT FUEL INJECTION (MFI) <2.4L> 13A-37 STEP 1. Using scan tool MB991502, check data list item 12: CAUTION To prevent damage to scan tool MB991502, always turn the 12, Volume Air Flow Sensor. (4) Warm up the engine to normal operating temperature:80 ° C to 96 ° C(176 ° F to 205 ° F). • The standard value during idling should be 10Hz or • When the engine is revved, the frequency should (5) Turn the ignition switch to the "LOCK" (OFF) position. Q: Is the sensor operating properly? YES : It can be assumed that this malfunction is intermittent. Refer to GROUP 00, How to Use Troubleshooting/ ). NO : Go to Step 2. STEP 2. Check the reset signal voltage at volume air flow backprobing. • Voltage should be between 6.0 and 9.0 volts. (4) Turn the ignition switch to the "LOCK" (OFF) position. Q: Is the voltage normal? YES : Go to Step 5. AC003081 AB 16 PIN MB991502 AKX01515 AC B-14 CONNECTOR 1 2 3 4 5 6 7 |