Mitsubishi Galant 9G. Manual — part 683
MULTIPORT FUEL INJECTION (MFI) DIAGNOSIS
TSB Revision
MULTIPORT FUEL INJECTION (MFI) <2.4L ENGINE>
13A-174
STEP 5. Check for open circuit and harness damage
between throttle position sensor connector B-06 (terminal
No. 3) and PCM connector B-22 (terminal No. 95).
Q: Is the harness wire in good condition?
YES : Go to Step 6.
NO : Repair it. Then go to Step 8.
AK303818
1
6 5 4 3 2
AB
CONNECTOR: B-06
B-06 (B)
HARNESS
CONNECTOR:
COMPONENT SIDE
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
MULTIPORT FUEL INJECTION (MFI) DIAGNOSIS
TSB Revision
MULTIPORT FUEL INJECTION (MFI) <2.4L ENGINE>
13A-175
STEP 6. Using scan tool MB991958, check data list item 79:
Throttle Position Sensor (main).
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) Detach the intake air hose at the throttle body.
(4) Disconnect the connector of the throttle position sensor.
(5) Use test harness special tool (MB991658) to connect only
terminals No. 3, No. 4, No. 5, and No. 6.
(6) Set scan tool MB991958 to the data reading mode for item
79, Throttle Position Sensor (main).
• Output voltage should be between 0.3 and 0.7 volt when
the throttle valve is fully closed with your finger.
• Output voltage should be 4.0 volts or more when the
throttle valve is fully open with your finger.
(7) 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 8.
STEP 7. Replace the throttle body assembly.
(1) Replace the throttle body assembly.
(2) Turn the ignition switch to the "ON" position.
(3) After the DTC has been deleted, read the DTC again.
(4) Turn the ignition switch to the "LOCK" (OFF) position.
Q: Is DTC P0123 set?
YES : Replace the PCM. Then go to Step 8.
NO : The inspection is complete.
AK303804AB
MB991910
DATA LINK
CONNECTOR
MB991824
MB991827
AK303818
1
6 5 4 3 2
AB
CONNECTOR: B-06
B-06 (B)
HARNESS
CONNECTOR:
COMPONENT SIDE
MULTIPORT FUEL INJECTION (MFI) DIAGNOSIS
TSB Revision
MULTIPORT FUEL INJECTION (MFI) <2.4L ENGINE>
13A-176
STEP 8. Using scan tool MB991958, read the diagnostic
trouble code (DTC).
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) After the DTC has been deleted, read the DTC again.
(4) Turn the ignition switch to the "LOCK"(OFF) position.
Q: Is DTC P0123 set?
YES : Retry the troubleshooting.
NO : The inspection is complete.
AK303804AB
MB991910
DATA LINK
CONNECTOR
MB991824
MB991827
MULTIPORT FUEL INJECTION (MFI) DIAGNOSIS
TSB Revision
MULTIPORT FUEL INJECTION (MFI) <2.4L ENGINE>
13A-177
DTC P0125: Insufficient Coolant Temperature for Closed Loop Fuel Control
CAUTION
If DTC P0125 has been set, TCL related DTC
U1120 is also set. After P0125 has been diag-
nosed, don't forget to erase DTC U1120.
1 2
52
51
53 54 55 56
57
58 59 60 61 62
63
64 65 66 67 68 69
70
71 72 73 74 75
76
77 78 79 80 81 82
83
100
99
92
91
93 94 95
96 97 98
101 102 103 104
105 106 107 108
109 110 111 112 113
AK303813
YELLO
W
-GREEN
BLA
CK
ENGINE COOLANT
TEMPERATURE SENSOR
POWERTRAIN CONTROL MODULE (PCM)
5 V
93
2
B-104
(MU802406)
69
1
Engine Coolant Temperature Sensor Circuit
B-21
B-22
AK303814
ENGINE
COOLANT
TEMPERATURE
SENSOR
AB
CONNECTOR: B-104
B-104 (B)
AK303013
CONNECTORS: B-21, B-22
PCM
AB
AIR CLEANER
B-22 (B)
B-21 (B)
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