Mitsubishi Eclipse. Manual — part 165
MULTIPORT FUEL INJECTION (MFI) DIAGNOSIS
TSB Revision
MULTIPORT FUEL INJECTION (MFI) <2.4L>
13A-153
DTC SET CONDITIONS
Logic Flow Chart
.
Check Conditions
• 2 seconds or more have passed since the staring
sequence was completed.
Judgement Criteria
• Engine coolant temperature sensor output volt-
age has continued to be 4.6 volts or higher [cor-
responding to a coolant temperature of
−45°C
(
−113°F) or lower] for 2 seconds.
.
OBD-ll DRIVE CYCLE PATTERN
Refer to Diagnostic Function
−OBD-ll Drive
Cycle
−Procedure 6−Other Monitor
.
TROUBLESHOOTING HINTS (The most likely
causes for this code to be set are: )
• Engine coolant temperature sensor failed.
• Open engine coolant temperature sensor circuit,
or connector damage.
• ECM failed. <M/T>
• PCM failed. <A/T>
DIAGNOSIS
Required Special Tools:
• MB991958 (MUT-III Sub Assembly)
• MB991824: V.C.I.
• MB991827: USB Cable
• MB991911: Main Harness B
START
OUTPUT VOLTAGE > 4.6V
OUTPUT VOLTAGE < 0.1V
END
NO
NO
NO
YES
YES
YES
MALFUNCTION
GOOD
CONTINUOUS
FAILURE FOR 2secs
MONITORING
CONDITIONS?
NO
YES
AK301426
MULTIPORT FUEL INJECTION (MFI) DIAGNOSIS
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MULTIPORT FUEL INJECTION (MFI) <2.4L>
13A-154
STEP 1. Using scan tool MB991958, check data list item 21:
Engine Coolant Temperature 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
21, Engine Coolant Temperature Sensor.
• The engine coolant temperature and temperature
shown with the scan tool should approximately 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
NO : Go to Step 2.
STEP 2. Check connector B-11 at the engine coolant
temperature sensor for damage.
Q: Is the connector in good condition?
YES : Go to Step 3.
NO : Repair or replace it. Refer to GROUP 00E, Harness
Connector Inspection
. Then go to Step 11.
AK300810
AB
MB991911
16-PIN
MB991827
MB991824
AK300404
1
2
CONNECTOR: B-11
AB
B-11 (B)
HARNESS CONNECTOR:
COMPONENT SIDE
MULTIPORT FUEL INJECTION (MFI) DIAGNOSIS
TSB Revision
MULTIPORT FUEL INJECTION (MFI) <2.4L>
13A-155
STEP 3. Measure the sensor supply voltage at engine
coolant temperature sensor harness side connector B-11.
(1) Disconnect the connector B-11 and measure at the harness
side.
(2) Turn the ignition switch to the "ON" position.
(3) Measure the voltage between terminal No. 1 and ground.
• Voltage should be between 4.5 and 4.9 volts.
(4) Turn the ignition switch to the "LOCK" (OFF) position.
Q: Is the measured voltage between 4.5 and 4.9 volts?
YES : Go to Step 7.
NO : Go to Step 4.
AK300404
1
2
CONNECTOR: B-11
AB
B-11 (B)
HARNESS CONNECTOR:
COMPONENT SIDE
AK000234
B-11 HARNESS
CONNECTOR:
COMPONENT SIDE
2 1
AN
MULTIPORT FUEL INJECTION (MFI) DIAGNOSIS
TSB Revision
MULTIPORT FUEL INJECTION (MFI) <2.4L>
13A-156
STEP 4. Measure the sensor supply voltage at ECM
connector C-60 <M/T> or PCM connector C-54 <A/T> by
backprobing.
(1) Do not disconnect the ECM connector C-60 <M/T> or PCM
connector C-54 <A/T>.
(2) Disconnect the engine coolant temperature sensor
connector B-11.
(3) Turn the ignition switch to the "ON" position.
AK300415
82
78
8180
89
90
91
92
79
87
71
74 73 72
76 75
77
85
88
83
84
86
CONNECTOR: C-60 <M/T>
AB
C-60 (G)
HARNESS CONNECTOR:
COMPONENT SIDE
AK300412
42
43
48
49
50
51
52
53
54
55
56
57
46 45 44
58
59
60
61
62
63
64
65
66
47
41
C-54 (GR)
CONNECTOR: C-54 <A/T>
AB
HARNESS CONNECTOR:
COMPONENT SIDE
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