Mitsubishi Eclipse. Manual - part 388
MULTIPORT FUEL INJECTION (MFI) DIAGNOSIS
TSB Revision
MULTIPORT FUEL INJECTION (MFI) <3.0L>
13B-95
STEP 4. Using scan tool MB991958, check data list item 95:
Manifold Absolute Pressure 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) Turn the ignition switch to the "ON" position.
(3) Set scan tool MB991958 to the data reading mode for item
95, Manifold Absolute Pressure Sensor.
• When altitude is 0 m (0 foot), 101 kPa (29.8 in.Hg).
• When altitude is 600 m (1,969 feet), 95 kPa (28.1 in.Hg).
• When altitude is 1,200 m (3,937 feet), 88 kPa (26.0
in.Hg).
• When altitude is 1,800 m (5,906 feet), 81 kPa (23.9
in.Hg).
(4) Start the engine.
• When the engine is idling, 18 − 38 kPa (5.3 − 11.2
in.Hg).
• When the engine is suddenly revved, manifold absolute
pressure increases.
(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 : Replace the ECM or PCM. Then go to Step 12.
STEP 5. Measure the sensor supply voltage at manifold
absolute pressure sensor connector B-04 by backprobing.
(1) Do not disconnect the connector B-04.
(2) Turn the ignition switch to the "ON" position.
(3) Measure the voltage between terminal No. 3 and ground by
backprobing.
• Voltage should be between 4.8 and 5.2 volts.
(4) Turn the ignition switch to the "LOCK" (OFF) position.
Q: Is the measured voltage between 4.8 and 5.2 volts?
YES : Go to Step 7.
NO : Go to Step 6.
AK300810
AB
MB991911
16-PIN
MB991827
MB991824
AK103763
2 1
3
CONNECTOR: B-04
AC
B-04(B)
HARNESS CONNECTOR:
COMPONENT SIDE
3
2
1
AK203036
B-04 HARNESS
CONNECTOR:
HARNESS SIDE
AE