Mitsubishi Colt Ralliart. Manual - part 710

TROUBLESHOOTING

MULTIPORT FUEL INJECTION (MPI) <4G1>

13B-165

STEP 9. Check harness between A-108 (terminal 
No. 1) purge control solenoid valve connector 
and A-114 (terminal No. 38) engine-ECU 
connector.

• Check output line for damage.

Q: Is the check result normal?

YES : 

Go to Step 10 .

NO : 

Repair.

STEP 10. Check harness between A-108 (terminal 
No. 2) purge control solenoid valve connector 
and B-106 (terminal No. 4) engine control relay 
connector.

NOTE: Before checking harness, check intermediate 
connectors A-17 and B-112, and repair if necessary.

• Check power supply line for damage.

Q: Is the check result normal?

YES : 

Go to Step 11 .

NO : 

Repair.

AK402119

1

2

AC

Connector: A-108

Harness side 
connector

A-108(B)

AK402745

6

4

2

5

3

1

9

7

8

10

11

12

13

14

15

16

17

18

19

20

21

22

23

24

25

26

27

28

29

30

31

32

33

34

35

36

37

38

39

40

41

42

43

44

45

46

47

48

49

50

51

52

53

54

55

56

57

58

59

60

61

62

63

64

65

66

L

AF

A-114

Connector: 

A-114

Harness side connector

Engine-ECU

Battery

AK402119

1

2

AC

Connector: A-108

Harness side 
connector

A-108(B)

3

2

1

4

AK402084

J/B side 
connector

B-106

Connector: B-106
J/B (front side)

AC

Main

Index

Group

TOC

TROUBLESHOOTING

MULTIPORT FUEL INJECTION (MPI) <4G1>

13B-166

STEP 11. M.U.T.-III actuator test

• Item 08: Purge control solenoid valve

OK: Operating sound can be heard and the 
valve vibrates.

Q: Is the check result normal?

YES : 

Intermittent malfunction (Refer to GROUP 

00 

− How to Use 

Troubleshooting/Inspection Service Points 

− 

How to Cope with Intermittent Malfunctions 

P.00-13

).

NO : 

Replace engine-ECU.

Code No. P0500: Vehicle Speed Signal System

FUNCTION

• The vehicle speed signal is input to engine-ECU 

from ASC-ECU through CAN communication.

TROUBLE JUDGMENT

Check Condition

• 2 seconds later from when ignition switch is in 

ON position or after engine starts.

Judgement Criterion

• Engine speed is more than 2,500 r/min and is 

less than 4,500 r/min.

• Under the high load operation

• For 4 seconds, vehicle speed information 

received by CAN doesn't change.

Or

• For 4 seconds, vehicle speed information 

received by CAN is abnormal.

PROBABLE CAUSES

• Failed ABS-ECU <Vehicle without ASC>

• Failed ABS/ASC-ECU <Vehicle with ASC>

• Failed CAN

• Failed engine-ECU

DIAGNOSIS PROCEDURE

STEP 1. M.U.T.-III diagnosis code

Q: Is diagnosis code related with CAN communication 

displayed?
YES : 

Inspection chart for diagnosis code (Refer 

to 

P.13B-18

).

NO : 

Go to Step 2 .

STEP 2. M.U.T.-III other system diagnosis code

• Confirm whether the diagnosis codes are output 

from ASC-ECU.

Q:  Is the diagnosis code output?

YES : 

Perform the troubleshooting of ASC, (Refer 

to GROUP 35C 

− Troubleshooting − 

Diagnosis Code Chart 

P.35C-6

).

NO : 

Replace engine-ECU.

Main

Index

Group

TOC

TROUBLESHOOTING

MULTIPORT FUEL INJECTION (MPI) <4G1>

13B-167

Code No. P0513: Immobilizer Malfunction

OPERATION

• The signals are sent and received between 

engine-ECU (terminal No. 120) and immobi-
lizer-ECU (terminal No. 3).

FUNCTION

• Engine-ECU sends or receives the control sig-

nals to or from immobilizer-ECU to certify the 
ignition key.

NOTE: 

.

•

If the registered ignition keys are close each 
other when starting the engine, radio interfer-
ence may cause this code to be displayed.

•

This code may be displayed when registering 
the key encrypted code.

TROUBLE JUDGMENT

Check Condition

• Ignition switch is in "ON" position.

Judgment Criterion

• When the communication error between 

engine-ECU and the immobilizer-ECU continues 
for 4 seconds or more.

PROBABLE CAUSES

• Open/short circuit in immobilizer system circuit or 

loose connector contact

• Failed immobilizer-ECU

• Failed engine-ECU

AK503589

R

92 93 94 95969798

77 78 79 808182838485868788899091

99

100

107 108 109 110 111112113114115116117118119120121

122 123 124 125126127128129130131132133134135136

101102103104105106

71 72

73 74

75 76

1 2 3 4 5 6 7 8

AD

Immobilizer-ECU Circuit

B-49

A-08

Engin-ECU

Immobilizer-ECU

Wire clolour code
B: Black  LG: Light green  G: Green  L: Blue  W: White  Y: Yellow  SB: Sky blue  BR: Brown  O: Orange  GR: Gray  
R: Red  P: Pink  V: Violet  P: Purple

120

10

B-40

BR

BR

3

Main

Index

Group

TOC

TROUBLESHOOTING

MULTIPORT FUEL INJECTION (MPI) <4G1>

13B-168

DIAGNOSIS PROCEDURE

STEP 1. Connector check: B-49 immobilizer-ECU 
connector and A-08 engine-ECU connector.

Q: Is the check result normal? 

YES : 

Go to Step 2 .

NO : 

Repair or replace.

STEP 2. Check harness between B-49 (terminal 
No. 3) immobilizer-ECU connector and A-08 
(terminal No. 120) engine-ECU connector.

NOTE: Before checking harness, check intermediate 
connector B-40, and repair if necessary.

• Check output line for open/short circuit and dam-

age.

Q: Is the check result normal? 

YES : 

Go to Step 3 .

NO : 

Repair.

STEP 3. Check the trouble symptoms.

Q: Is the check result normal? 

YES : 

Go to Step 4 .

NO : 

Intermittent malfunction (Refer to GROUP 
00 

− How to Use 

Troubleshooting/Inspection Service Points 

− 

How to Cope with Intermittent Malfunctions 

P.00-13

).

AK503591

8 7 6 5 4 3 2 1

B-49

AB

Connectr: B-49

Harness side

connector

AK402725

77

78

79

80

81

82

83

84

92

93

94

95

96

97

98

99

85

86

87

88

89

90

91

100

101

102

103

104

105

106

115

116

117

118

119

120

121

107

108

109

110

111

112

113

114

130

131

132

133

134

135

136

122

123

124

125

126

127

128

129

72 71

74 73

76 75

R

AI

A-08

Connector: 

A-08

A-08 Special tool power plant ECU check 
harness

Engine-ECU

Battery

AK503591

8 7 6 5 4 3 2 1

B-49

AB

Connectr: B-49

Harness side

connector

AK402725

77

78

79

80

81

82

83

84

92

93

94

95

96

97

98

99

85

86

87

88

89

90

91

100

101

102

103

104

105

106

115

116

117

118

119

120

121

107

108

109

110

111

112

113

114

130

131

132

133

134

135

136

122

123

124

125

126

127

128

129

72 71

74 73

76 75

R

AI

A-08

Connector: 

A-08

A-08 Special tool power plant ECU check 
harness

Engine-ECU

Battery

Main

Index

Group

TOC