Mitsubishi Galant 9G. Manual — part 778
MULTIPORT FUEL INJECTION (MFI) DIAGNOSIS
TSB Revision
MULTIPORT FUEL INJECTION (MFI) <2.4L ENGINE>
13A-554
STEP 4. Using scan tool MB991958, check data list item 22:
Crankshaft Position 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
22, Crankshaft Position Sensor.
• The tachometer and engine speed indicated on the scan
tool should match.
(4) 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
− How to
Cope with Intermittent Malfunctions
.
NO : Replace the PCM. Then go to Step 22.
STEP 5. Check harness connector B-119 at the crankshaft
position sensor intermediate connector for damage.
Q: Is the harness connector in good condition?
YES : Go to Step 6.
NO : Repair or replace it. Refer to GROUP 00E, Harness
. Then go to Step 22.
AK303804AB
MB991910
DATA LINK
CONNECTOR
MB991824
MB991827
AK303860
1
2
3
AB
CONNECTOR: B-119
B-119 (GR)
HARNESS
CONNECTOR:
COMPONENT SIDE
MULTIPORT FUEL INJECTION (MFI) DIAGNOSIS
TSB Revision
MULTIPORT FUEL INJECTION (MFI) <2.4L ENGINE>
13A-555
STEP 6. Measure the sensor supply voltage at crankshaft
position sensor intermediate harness side connector
B-119.
(1) Disconnect the connector B-119 and measure at the
harness side.
(2) Turn the ignition switch to the "ON" position.
(3) Measure the voltage between terminal No. 2 and ground.
• Voltage should be between 4.9 and 5.1 volts.
(4) Turn the ignition switch to the "LOCK" (OFF) position.
Q: Is the measured voltage between 4.9 and 5.1 volts?
YES : Go to Step 11.
NO : Go to Step 7.
AK303860
1
2
3
AB
CONNECTOR: B-119
B-119 (GR)
HARNESS
CONNECTOR:
COMPONENT SIDE
1
2
3
AK302110
B-119 HARNESS
CONNECTOR:
COMPONENT SIDE
AC
MULTIPORT FUEL INJECTION (MFI) DIAGNOSIS
TSB Revision
MULTIPORT FUEL INJECTION (MFI) <2.4L ENGINE>
13A-556
STEP 7. Measure the sensor supply voltage at PCM
connector B-22 by using power plant ECU check harness
special tool MB991923.
(1) Disconnect the all PCM connectors and connect power
plant ECU check harness special tool MB991923 between
the separated connectors.
(2) Disconnect the crankshaft position sensor intermediate
connector B-119.
(3) Turn the ignition switch to the "ON" position.
AK303016
104
96
94
95
93 92 91
99 98 97
103 102 101 100
108 107 106 105
113 112 111 110 109
CONNECTOR: B-22
B-22 (B)
PCM
AB
HARNESS CONNECTOR:
COMPONENT SIDE
AIR CLEANER
AK202956
104
96
94
95
93 92 91
99 98 97
103 102 101 100
108 107 106 105
113 112 111 110 109
AB
POWER PLANT ECU
CHECK HARNESS CONNECTOR
MB991923
PCM
MULTIPORT FUEL INJECTION (MFI) DIAGNOSIS
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MULTIPORT FUEL INJECTION (MFI) <2.4L ENGINE>
13A-557
(4) Measure the voltage between terminal No. 103 and ground.
• Voltage should be between 4.9 and 5.1 volts.
(5) Turn the ignition switch to the "LOCK" (OFF) position.
Q: Is the measured voltage between 4.9 and 5.1 volts?
YES : Go to Step 8.
NO : Go to Step 9.
STEP 8. Check harness connector B-22 at PCM for
damage.
Q: Is the harness connector in good condition?
YES : Repair harness wire between crankshaft position
sensor intermediate connector B-119 (terminal No. 2)
and PCM connector B-22 (terminal No. 103) because
of open circuit. Then go to Step 22.
NO : Repair or replace it. Refer to GROUP 00E, Harness
. Then go to Step 22.
104
96
94
95
93 92 91
99 98 97
103 102 101 100
108 107 106 105
113 112 111 110 109
AK202940AB
POWER PLANT ECU
CHECK HARNESS
CONNECTOR
AK303016
104
96
94
95
93 92 91
99 98 97
103 102 101 100
108 107 106 105
113 112 111 110 109
CONNECTOR: B-22
B-22 (B)
PCM
AB
HARNESS CONNECTOR:
COMPONENT SIDE
AIR CLEANER
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