Mitsubishi Montero Sport (2004+). Manual - part 156
MULTIPORT FUEL INJECTION (MFI) DIAGNOSIS
TSB Revision
MULTIPORT FUEL INJECTION (MFI)
13A-37
STEP 1. Using scan tool MB991958, check data list item 12:
Volume Airflow Sensor.
CAUTION
To prevent damage to scan tool MB991958, always turn the
ignition switch to the "LOCK" (OFF) position before con-
necting or disconnecting scan tool MB991958.
(1) Connect scan tool MB991958 to the data link connector.
(2) Start the engine and run at idle.
(3) Set scan tool MB991958 to the data reading mode for item
12, Volume Airflow Sensor.
(4) Warm up the engine to normal operating temperature: 80
°C
to 95
°C (176°F to 203°F).
• The standard value during idling should be 10 Hz or
more.
• When the engine is revved, the frequency should
increase according to the increase in engine speed.
(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/Inspection Service Points
NO : Go to Step 2.
STEP 2. Measure the reset signal voltage at volume airflow
sensor connector A-01 by backprobing.
(1) Do not disconnect the connector A-01.
(2) Turn the ignition switch to the "ON" position.
(3) Measure the voltage between terminal No. 7 and ground by
backprobing.
• Voltage should be between 6.0 and 9.0 volts.
(4) Turn the ignition switch to the "LOCK" (OFF) position.
Q: Is the measured voltage between 6.0 and 9.0 volts?
YES : Go to Step 5.
NO : Go to Step 3.
AK303629AB
MB991911
MB991827
MB991824
16-PIN
AK103913
3
4
5
1
2
6
7
CONNECTOR: A-01
A-01(B)
AB
HARNESS
CONNECTOR:
COMPONENT SIDE
AKX01515 AI
A-01 HARNESS
CONNECTOR:
HARNESS SIDE
1 2 3 4 5 6 7