Mitsubishi Eclipse / Eclipse Spyder (2000-2002). Service and repair manual — part 227
MULTIPORT FUEL INJECTION (MFI) DIAGNOSIS
TSB Revision
MULTIPORT FUEL INJECTION (MFI) <3.0L ENGINE>
13B-107
STEP 9. Check connector C-58, C-62 at ECM <M/T> or
connector C-55, C-59 at PCM <A/T> for damage.
Q: Is the connector in good condition?
YES : Go to Step 10.
NO : Repair or replace it. Refer to GROUP 00E, Harness
Connector Inspection (
STEP 10. Using scan tool MB991502, check data list item
14: Throttle Position Sensor.
CAUTION
To prevent damage to scan tool MB991502, always turn the
ignition switch to the "LOCK" (OFF) position before
connecting or disconnecting scan tool MB991502.
(1) Connect scan tool MB991502 to the data link connector.
(2) Turn the ignition switch to the "ON" position.
(3) Set scan tool MB991502 to the data reading mode for item
14, Throttle Position Sensor.
•
With the throttle valve in the idle position, voltage should
be between 0.535 and 0.735 volts.
•
With the throttle valve in the full-open position, voltage
should be between 4.5 and 5.5 volts.
(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 11.
STEP 11. Test the OBD-II drive cycle.
(1) Carry out a test drive with the drive cycle pattern. Refer to
, Procedure 6
−
Other Monitor.
(2) Check the diagnostic trouble code (DTC).
Q: Is the DTC P0123 is output?
YES : Retry the troubleshooting.
NO : The inspection is complete.
DTC P0128: Coolant Thermostat Malfunction
TECHNICAL DESCRIPTION
•
The ECM <M/T> or PCM <A/T> checks the time
for the engine coolant temperature to reach the
judgment temperature.
DTC SET CONDITIONS
Check Area
•
Engine coolant temperature is between -10
°
C
(14
°
F) and 82
°
C (180
°
F) when the engine is
started.
AK000225
CONNECTORS : C-58, C-62<M/T>,
C-55, C-59<A/T>
C-55
C-58
PCM<A/T>
ECM<M/T>
AK
C-59
C-62
AKX01177
16 PIN
MB991502
AB
MULTIPORT FUEL INJECTION (MFI) DIAGNOSIS
TSB Revision
MULTIPORT FUEL INJECTION (MFI) <3.0L ENGINE>
13B-108
•
The engine coolant temperature
−
intake air
temperature is 5
°
C (48
°
F) or less when the
engine is started.
•
The intake air temperature when the engine is
started
−
intake air temperature is 2
°
C (36
°
F) or
less.
•
The volume air flow sensors output frequency is
in the low frequency (50-100Hz or less) state for
300 seconds or less.
Judgment Criteria
•
The time for the engine coolant temperature to
rise to 82
°
C (180
°
F) takes longer than the
specified time *.
*: Approximately 11 to 23 minutes when the
engine coolant temperature at start is 20
°
C
(68
°
F) or more.
Approximately 20 to 54 minutes when the
engine coolant temperature at start is 20
°
C
(68
°
F) or less.
•
Only one monitor during one drive cycle.
TROUBLESHOOTING HINTS (The most likely
causes for this code to be set are:)
•
The thermostat is faulty
•
ECM failed. <M/T>
•
PCM failed. <A/T>
DIAGNOSIS
STEP 1. Check the cooling system.
Refer to GROUP 14, Engine Cooling Diagnosis (
).
Q: Is the cooling system normal?
YES : Replace the ECM or PCM. Then check that the DTC
P0128 does not reset.
NO : Repair it. Then check that the DTC P0128 does not
reset.
MULTIPORT FUEL INJECTION (MFI) DIAGNOSIS
TSB Revision
MULTIPORT FUEL INJECTION (MFI) <3.0L ENGINE>
13B-109
DTC P0130: O
2
Sensor Circuit Malfunction (bank 1 sensor 1)
CIRCUIT OPERATION
•
A voltage corresponding to the oxygen
concentration in the exhaust gas is sent to the
ECM (terminal 72) <M/T> or PCM (terminal 72)
<A/T> from the output terminal (terminal 4) of the
right bank heated oxygen sensor (front).
AK000690
4
1 2
3
BL
ACK
BL
ACK
BL
UE
B-27
MU802605
ENGINE CONTROL
MODULE(ECM)<M/T>
OR
POWERTRAIN CONTROL
MODULE(PCM)<A/T>
RIGHT BANK HEATED OXYGEN
SENSOR(FRONT)
FROM MFI RELAY
TO ECM
OR PCM
1
2
3
4
49<M/T>*1
57<A/T>*3
72<M/T>*2
72<A/T>*4
NOTE
*1:ECM connector C-58<M/T>
*2:ECM connector C-62<M/T>
*3:PCM connector C-55<A/T>
*4:PCM connector C-59<A/T>
98
78
71
88 89
76 77
72
79
91
73
80
74
75
81
92
82 83
93
84 85
94
86 87
95 96
90
80
87
81
94
85
82
84
93
86
98
99
74
92
73
83
88
91
95
97
96
100
89
78
71
90
76 77
75
72
79
97
C-62<M/T>
(MU803783)
C-59<A/T>
(MU803782)
65
43
50
42
49
41
48
60 61
64
46 47
58 59
67 68
45
56
66
52
51
44
53
62
54
63
57
55
C-58<M/T>
(MU803782)
C-55<A/T>
(MU803781)
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
ACX02481
CONNECTOR : B-27
RIGHT BANK
HEATED OXYGEN
SENSOR(FRONT)
AC
AK000225
CONNECTORS : C-58, C-62<M/T>,
C-55, C-59<A/T>
C-55
C-58
PCM<A/T>
ECM<M/T>
AK
C-59
C-62
MULTIPORT FUEL INJECTION (MFI) DIAGNOSIS
TSB Revision
MULTIPORT FUEL INJECTION (MFI) <3.0L ENGINE>
13B-110
•
Terminal 2 of the right bank heated oxygen
sensor (front) is grounded with ECM (terminal 49)
<M/T> or PCM (terminal 57) <A/T>.
TECHNICAL DESCRIPTION
•
The right bank heated oxygen sensor (front)
detects the concentration of oxygen in the
exhaust gas; it converts those data to voltage,
and inputs the resulting signals to the ECM <M/
T> or PCM <A/T>.
•
When the right bank heated oxygen sensor
(front) begins to deteriorate, the heated oxygen
sensor signal response becomes poor.
•
The ECM <M/T> or PCM <A/T> forcibly varies
the air/fuel mixture to make it leaner and richer,
and checks the response speed of the right bank
heated oxygen sensor (front). In addition, the
ECM <M/T> or PCM <A/T> also checks for an
open circuit in the right bank heated oxygen
sensor (front) output line.
DTC SET CONDITIONS
Check Conditions
•
Right bank heated oxygen sensor (front) signal
voltage has continued to be 0.2 volt or lower for
three minutes or more after the starting sequence
was completed.
•
Engine coolant temperature is higher than 82
°
C
(180
°
F).
•
Engine speed is higher than 1,200 r/min.
•
Volumetric efficiency is higher than 25 percent.
•
Monitoring time: 7 seconds.
Judgment Criteria
•
Input voltage supplied to the ECM <M/T> or PCM
<A/T> interface circuit is higher than 4.5 volts
when 5 volts is applied to the right bank heated
oxygen sensor (front) output line via a resistor.
TROUBLESHOOTING HINTS (The most likely
causes for this code to be set are:)
•
Right bank heated oxygen sensor (front)
deteriorated.
•
Open circuit in right bank heated oxygen sensor
(front) output line.
•
Open circuit in right black heated oxygen sensor
(front) ground line.
•
ECM failed. <M/T>
•
PCM failed. <A/T>
DIAGNOSIS
Required Special Tools
MB991502: Scan Tool (MUT-II)
MD998464: Test Harness
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