MULTIPORT FUEL INJECTION(MFI) DIAGNOSIS
MULTIPORT FUEL INJECTION (MFI) <2.4L>
STEP 1. Using scan tool MB991502, check data list item 12:
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
F to 205
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
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.
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