Mitsubishi Eclipse. Manual - part 405

MULTIPORT FUEL INJECTION (MFI) DIAGNOSIS

TSB Revision

MULTIPORT FUEL INJECTION (MFI) <3.0L>

13B-163

STEP 10. Check the engine coolant temperature sensor.
(1) Disconnect the engine coolant temperature sensor 

connector B-11.

(2) Remove the engine coolant temperature sensor.

(3) With the temperature sensing portion of engine coolant 

temperature sensor immersed in hot water, check 
resistance.

Standard value:

14 

− 17 kΩ [at −20°C (−4°F)]

5.1 

− 6.5 kΩ [at 0°C (32°F)]

2.1 

− 2.7 kΩ [at 20°C (68°F)]

0.9 

− 1.3 kΩ [at 40°C (104°F)]

0.48 

− 0.68 kΩ [at 60°C (140°F)]

0.26 

− 0.36 kΩ [at 80°C (176°F)]

(4) Apply 3M

 AAD part number 8731 or equivalent on the 

screw section of the engine coolant temperature sensor.

(5) Install the engine coolant temperature sensor, and tighten 

to the specified torque.

Tightening torque: 29 

± 10 N⋅m (22 ± 7 ft-lb)

Q: Is the resistance at the standard value?

YES : Replace the ECM or PCM. Then go to Step 11.
NO :  Replace the engine coolant temperature sensor. 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 

Diagnostic Function 

− OBD-II Drive Cycle − Procedure 6 − 

Other Monitor 

P.13B-7

.

(2) Check the diagnostic trouble code (DTC).
Q: Is DTC P0118 set?

YES : Retry the troubleshooting.
NO :  The inspection is complete.

AK300435

1

2

CONNECTOR: B-11

AB

B-11 (B)

HARNESS CONNECTOR:
COMPONENT SIDE

AKX01622

AKX01623 AB

MULTIPORT FUEL INJECTION (MFI) DIAGNOSIS

TSB Revision

MULTIPORT FUEL INJECTION (MFI) <3.0L>

13B-164

DTC P0121: Throttle Position Sensor Circuit Range/Performance Problem

AK000689

2 3 4

1

GREEN-

YELL

O

W

YELL

OW

YELL

OW

BL

ACK

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

49
<M/T>*1
57
<A/T>*3

78
<M/T>*2
78
<A/T>*4

42
<M/T>*1
46
<A/T>*3

5V

AUTO-CRUISE
CONTROL SYSTEM

      B-07
(MU802724)

THROTTLE POSITION
SENSOR

4

3

1

ENGINE CONTROL
MODULE (ECM) <M/T>
OR
POWERTRAIN CONTROL
MODULE (PCM) <A/T>

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

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>

Throttle Position Sensor (TPS) Circuit

AK300080

CONNECTOR: B-07

THROTTLE
POSITION
SENSOR

AB

B-07 (B)

AK300244

CONNECTORS: C-55, C-59 <A/T>

AD

PCM

C-55 (GR)

C-59 (GR)

MULTIPORT FUEL INJECTION (MFI) DIAGNOSIS

TSB Revision

MULTIPORT FUEL INJECTION (MFI) <3.0L>

13B-165

.

CIRCUIT OPERATION

• A 5-volt power supply is applied on the TPS 

power terminal (terminal No. 4) from the ECM 
(terminal No. 42) <M/T> or PCM (terminal No. 46) 
<A/T>. 
The ground terminal (terminal No. 1) is grounded 
with ECM (terminal No. 49) <M/T> or PCM (termi-
nal No. 57) <A/T>.

• When the throttle valve shaft is turned from the 

idle position to the fully opened position, the 
resistor between the TPS output terminal (termi-
nal No. 3) and ground terminal will increase 
according to the rotation. 

.

TECHNICAL DESCRIPTION

• The TPS outputs voltage which corresponds to 

the throttle valve opening angle.

• The ECM <M/T> or PCM <A/T> checks whether 

the voltage is within a specified range. 

.

DESCRIPTIONS OF MONITOR METHODS
Detect malfunction if the relation between throttle 

position sensor (main) and throttle position sen-
sor (sub) is wrong.

.

MONITOR EXECUTION
Continuous

.

MONITOR EXECUTION CONDITIONS (Other 
monitor and Sensor)

Other Monitor (There is no temporary DTC stored 

in memory for the item monitored below)

• Not applicable

Sensor (The sensor below is determined to be 

normal)

• Volume airflow sensor

.

AK300091

CONNECTORS: C-58, C-62 <M/T>

ECM

AD

C-58 (GR)

C-62 (GR)

MULTIPORT FUEL INJECTION (MFI) DIAGNOSIS

TSB Revision

MULTIPORT FUEL INJECTION (MFI) <3.0L>

13B-166

DTC SET CONDITIONS <Range/Performance problem-relation between main and sub>

Logic Flow Chart

.

Check Conditions

• 2 seconds or more have passed since the staring 

sequence was completed.

• Engine speed is higher than 2,000 r/min.

• Volumetric efficiency is higher than 60 percent.

Judgement Criteria

• TPS output voltage has continued to be 0.8 volt 

or lower for 2 seconds.

.

START

ENGINE SPEED > 2000rpm

LOAD VALUE > 60%

END

NO

NO

NO

NO

YES

YES

YES

YES

MALFUNCTION

GOOD

OUTPUT VOLTAGE

< 0.8V

MONITORING
CONDITIONS

CONTINUOUS

FAILURE FOR 2 secs

AK301427