Mitsubishi Colt Ralliart. Manual - part 70

 

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Mitsubishi Colt Ralliart. Manual - part 70

 

 

TROUBLESHOOTING

MULTIPORT FUEL INJECTION (MPI) <4A9>

13A-234

15

Knocking

P.13A-266

16

Ignition timing offset

P.13A-267

17

Run on (Dieseling)

P.13A-268

18

Odor, white smoke, black smoke, high-concentration CO/HC during idling

P.13A-269

19

Battery run down

P.13A-271

20

Overheating

P.13A-274

21

Abnormal rotation of fan motor

P.13A-275

22

Poor A/C performance

P.13A-280

23

Engine-ECU <M/T> or engine-CVT-ECU <CVT> power supply, engine control 
relay, ignition switch-IG1 system

P.13A-281

24

Fuel pump system

P.13A-289

25

Fan control relay system

P.13A-302

26

A/C compressor relay system

P.13A-310

27

Stop lamp switch system

P.13A-316

28

Ignition circuit system

P.13A-320

29

Purge control solenoid valve system

P.13A-325

Inspection 
procedure 
No.

Trouble symptom

Reference 
page

Main

Index

Group

TOC

TROUBLESHOOTING

MULTIPORT FUEL INJECTION (MPI) <4A9>

13A-235

SYMPTOM PROCEDURES

Inspection Procedure 1: Communication with engine-ECU <M/T> or engine-CVT-ECU <CVT> is not 
possible.

OPERATION

• There is data communication between diagnosis 

connector output terminal (terminal No. 7) and 
engine-ECU <M/T> or engine-CVT-ECU <CVT> 
(terminal No. 121).

COMMENT ON TROUBLE SYMPTOM

• The failure possibly occurs when engine-ECU 

<M/T> or engine-CVT-ECU <CVT> detects mal-
function, or is caused by malfunction of open or 
short in the combination meter circuit.

PROBABLE CAUSES

• Open/short/damaged circuit in engine-ECU 

<M/T> or engine-CVT-ECU <CVT> power circuit

• Open/short/damaged circuit between 

engine-ECU <M/T> or engine-CVT-ECU <CVT> 
and diagnosis connector

• Failed engine-ECU <M/T> or engine-CVT-ECU 

<CVT>

AK402806

1 2 3 4 5 6

12

11

10

1516

14

13

9

7 8

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

B-32 

MU803797

20

121

7

B-41

Diagnosis Connector Circuit

AC

A-08

Engine-ECU <M/T> or
engine-CVT-ECU <CVT>

Diagnosis connector

O-L

O-L

Wire colour 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  Pu: Purple

Main

Index

Group

TOC

TROUBLESHOOTING

MULTIPORT FUEL INJECTION (MPI) <4A9>

13A-236

DIAGNOSIS PROCEDURE

STEP 1. Check start - up.

Q: Is engine started

YES : 

Go to Step 2 .

NO : 

Check engine-ECU <M/T> or 
engine-CVT-ECU <CVT> power supply, 
engine control relay and ignition switch IG1 
system (Refer to Inspection Procedure 23 

P.13A-281

).

STEP 2. Connector check: A-08 engine-ECU 
connector or engine-CVT-ECU connector

Q: Is the check result normal?

YES : 

Go to Step 3 .

NO : 

Repair or replace the connector.

STEP 3. Check harness between B-32 (terminal 
No. 7) diagnosis connector and A-08 (terminal 
No. 121) engine-ECU connector or 
engine-CVT-ECU connector.

NOTE: Before checking harness, check intermediate 
connectors B-41 and repair if necessary.

• Check communication line for open/short circuit 

and damage.

Q: Is the check result normal?

YES : 

Go to Step 4 .

NO : 

Repair the damaged harness wire.

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

AG

A-08

Connector: 

A-08

Harness side connector

Battery

Engine-ECU <M/T> or
engine-CVT-ECU <CVT>

AK203401

1 2 3 4 5 6

12

11

10

1516

14

13

9

7 8

AE

Connector: B-32

B-32

Parking brake 
pedal

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

AG

A-08

Connector: 

A-08

Harness side connector

Battery

Engine-ECU <M/T> or
engine-CVT-ECU <CVT>

Main

Index

Group

TOC

TROUBLESHOOTING

MULTIPORT FUEL INJECTION (MPI) <4A9>

13A-237

STEP 4. Check the trouble symptom.

Q: Does trouble symptom persist?

YES : 

Replace engine-ECU <M/T> or 

engine-CVT-ECU <CVT>.

NO : 

Intermittent malfunction (Refer to GROUP 
00 

− How to Use 

Troubleshooting/Inspection Service Points 

− 

How to Cope with Intermittent Malfunctions 

P.00-13

).

Inspection Procedure 2: The Engine Warning Lamp Does Not Illuminate Right after the Ignition Switch 
is Turned the "ON" Position

COMMENTS ON TROUBLE SYMPTOM

• The combination meter illuminates engine warn-

ing lamp for 5 seconds just after the ignition 
switch is in ON position.

• If engine warning lamp does not illuminate just 

after the ignition switch is in ON position, the fail-
ure is possibly caused by malfunction of engine 
warning lamp, open or short in the combination 
meter circuits and so on.

PROBABLE CAUSES

• Failed engine warming lamp

• Open/short circuit in combination meter

DIAGNOSIS PROCEDURE

STEP 1. M.U.T.-III diagnosis code

Q: Is the diagnosis code set?

YES : 

Inspection chart for diagnosis code (Refer 

to 

P.13A-20

).

NO : 

Go to Step 2 .

STEP 2. Check the trouble symptoms.

Q: Does trouble system persist?

YES : 

Replace combination meter assembly.

NO : 

Intermittent malfunction (Refer to GROUP 
00 

− How to Use 

Troubleshooting/Inspection Service Points 

− 

How to Cope with Intermittent Malfunctions 

P.00-13

).

Inspection Procedure 3: The engine warning lamp remains illuminating and never goes out

COMMENT ON TROUBLE SYMPTOM

• Engine-ECU <M/T> or engine-CVT-ECU <CVT> 

has detected failed sensor or failed actuator. Or 
failure is possibly caused by short circuit or other 
faults.

PROBABLE CAUSE

• Short circuit in combination meter

DIAGNOSIS PROCEDURE

STEP 1. M.U.T.-III diagnosis code

Q: Is the diagnosis code set?

YES : 

Inspection chart for diagnosis code (Refer 

to 

P.13A-20

.)

NO : 

Go to Step 2 .

STEP 2. Check the trouble symptoms.

Q: Does trouble symptom persist?

YES : 

Replace combination meter assembly.

NO : 

Intermittent malfunction (Refer to 
GROUP00 

− How to Use 

Troubleshooting/Inspection Service Points 

− 

How to Cope with Intermittent Malfunctions 

P.00-13

).

Main

Index

Group

TOC

 

 

 

 

 

 

 

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