Mitsubishi Eclipse. Manual — part 435
MULTIPORT FUEL INJECTION (MFI) DIAGNOSIS
TSB Revision
MULTIPORT FUEL INJECTION (MFI) <3.0L>
13B-283
STEP 3. Check the sensor output voltage at ECM
connector C-62 <M/T> or PCM connector C-59 <A/T> by
backprobing.
(1) Do not disconnect the connector C-62 <M/T> or C-59
<A/T>.
(2) Start the engine and run at idle.
AK300460
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78
71
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79
91
73
80
74
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81
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83
93
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90
97
CONNECTOR: C-59 <A/T>
C-59 (GR)
AB
HARNESS CONNECTOR:
COMPONENT SIDE
AK300445
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CONNECTOR: C-62 <M/T>
C-62 (GR)
AB
HARNESS CONNECTOR:
COMPONENT SIDE
MULTIPORT FUEL INJECTION (MFI) DIAGNOSIS
TSB Revision
MULTIPORT FUEL INJECTION (MFI) <3.0L>
13B-284
(3) Measure the voltage between terminal No. 74 and ground
by backprobing.
• Warming up the engine. When the engine is 2,500 r/min,
the output voltage should repeat 0 volt and 0.6 to 1.0
volt alternately.
(4) Turn the ignition switch to the "LOCK" (OFF) position.
Q: Is the voltage normal?
YES : Go to Step 4.
NO : Go to Step 6.
AK000242
71 72
73 74
78
80 81
79
82 83 84 85 86 87 88 89
75 76
91 92 93
94 95
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AK000242AE
<M/T>
C-62 HARNESS
CONNECTOR:
HARNESS SIDE
77
90
100
AKX01536
7172 73 74
75 76 77
78 79 80 81 82 83 84 85 86 87 88 89
90 91
92 93 94
95 96
97 98
C-59 HARNESS
CONNECTOR:
HARNESS SIDE
AI
<A/T>
MULTIPORT FUEL INJECTION (MFI) DIAGNOSIS
TSB Revision
MULTIPORT FUEL INJECTION (MFI) <3.0L>
13B-285
STEP 4. Check connector B-28 at right bank heated
oxygen sensor (rear) and connector C-62 at ECM <M/T> or
connector C-59 at PCM <A/T> for damage.
Q: Is the connector in good condition?
YES : Go to Step 5.
NO : Repair or replace it. Refer to GROUP 00E, Harness
Connector Inspection
. Then go to Step 15.
AK300429
1
2
3
4
RIGHT BANK
HEATED OXYGEN
SENSOR (REAR)
CONNECTOR: B-28
AB
B-28 (GR)
HARNESS CONNECTOR:
COMPONENT SIDE
AK300460
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80
74
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97
CONNECTOR: C-59 <A/T>
C-59 (GR)
AB
HARNESS CONNECTOR:
COMPONENT SIDE
MULTIPORT FUEL INJECTION (MFI) DIAGNOSIS
TSB Revision
MULTIPORT FUEL INJECTION (MFI) <3.0L>
13B-286
STEP 5. Using scan tool MB991958, check data list item 69:
Heated Oxygen Sensor Bank 1, Sensor 2 (right rear).
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
69, Heated Oxygen Sensor Bank 1, Sensor 2 (right rear).
• Warming up the engine. When the engine is revved, the
output voltage should repeat 0 volt and 0.6 to 1.0 volt
alternately.
(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
NO : Replace the ECM or PCM. Then go to Step 15.
AK300445
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89
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90
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72
79
CONNECTOR: C-62 <M/T>
C-62 (GR)
AB
HARNESS CONNECTOR:
COMPONENT SIDE
AK300810
AB
MB991911
16-PIN
MB991827
MB991824
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