Content .. 51 52 53 54 ..

Mitsubishi Colt Ralliart. Manual - part 53

TROUBLESHOOTING

MULTIPORT FUEL INJECTION (MPI) <4A9>

13A-166

Code No. P0513: Immobilizer Malfunction

OPERATION

• The signals are sent and received between

engine-ECU <M/T> or engine-CVT-ECU <CVT>
(terminal No. 120) and immobilizer-ECU (terminal
No. 3).

FUNCTION

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

<CVT> sends or receives the control signals 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

• The communication error between engine-ECU

<M/T> or engine-CVT-ECU <CVT> and the
immobilizer-ECU for 4 seconds.

PROBABLE CAUSES

• Open/short circuit in immobilizer system circuit or

loose connector contact

• Failed immobilizer-ECU

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

<CVT>

AK503589

92 93 94 95969798

77 78 79 808182838485868788899091

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

Immobilizer-ECU Circuit

B-49

A-08

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

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

PU: Purple

120

B-40

Main

Index

Group

TOC

TROUBLESHOOTING

MULTIPORT FUEL INJECTION (MPI) <4A9>

13A-167

DIAGNOSIS PROCEDURE

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

Connectr: B-49

Harness side

connector

AK402725

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

A-08

Connector:

A-08

Harness side connector

Battery

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

AK503591

8 7 6 5 4 3 2 1

B-49

Connectr: B-49

Harness side

connector

AK402725

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

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-168

STEP 4. After replacing the immobilizer-ECU,
re-check the trouble symptoms.

Q: Is the check result normal?

YES :

Replace engine-ECU <M/T> or

engine-CVT-ECU <CVT>.

NO :

Check end.

Code No. P0603: EEP ROM MALFUNCTION

FUNCTION

• To check whether the information such as the idle

learned value and so on is stored in the memory
of engine-ECU <M/T> or engine-CVT-ECU
<CVT>.

TROUBLE JUDGMENT

Check Condition

• Ignition switch is in ON position.

Judgement Criterion

• The latest learned data that was flashed while the

ignition switch was in OFF position are not stored
correctly.

PROBABLE CAUSE

• Failed the engine-ECU <M/T> or

engine-CVT-ECU <CVT>

DIAGNOSIS

STEP 1. M.U.T.-III diagnosis code

• Reconfirmation of diagnosis code.

Q: Is the check result normal?

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

Code No. P0606: Microcomputer Malfunction System

FUNCTION

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

<CVT> check whether the microcomputer, which
performs the drive control of the throttle valve, is
normal.

TROUBLE JUDGMENT

Check Condition

• Ignition switch is ON position.

Judgment Criteria

• Battery voltage is more than 6.3 V <M/T>.

• Main microcomputer reference voltage is abnor-

mal.

PROBABLE CAUSE

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

<CVT>

DIAGNOSIS

STEP 1. M.U.T.-III diagnosis code

• Reconfirmation of diagnosis code.

Q: Is the diagnosis code set?

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

Main

Index

Group

TOC

TROUBLESHOOTING

MULTIPORT FUEL INJECTION (MPI) <4A9>

13A-169

Code No. P0622: Alternator FR Terminal System

OPERATION

• The energized state of the alternator field coil is

inputted from the alternator (terminal No. 4) to the
engine-ECU <M/T> or engine-CVT-ECU <CVT>
(terminal No. 65).

FUNCTION

• A signal of the power supply duty ratio for the

alternator field coil is inputted to the engine-ECU
<M/T> or engine-CVT-ECU <CVT>.

• In response to the signal, the engine-ECU <M/T>

or engine-CVT-ECU <CVT> detects the alterna-
tor output current and controls the idling speed
according to the output current (electric load).

TROUBLE JUDGMENT

Check Conditions

• After engine starts <M/T>

• Engine speed is 50 r/min or higher <CVT>.

Judgment Criterion

• Input voltage from the alternator FR terminal has

continued to be system voltage for 20 seconds.

PROBABLE CAUSES

• Failed alternator

• Open/short circuit in alternator FR terminal circuit

or loose connector contact

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

<CVT>

AK402692

3 4

1213

8 9

37
52 53 54 555657585960616263646566

38 39 404142434445464748495051

22 23 24 252627282930313233343536

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

Alternator

Y-B

IC voltage
regulator

Alternator Circuit

A-131
(MU802046)

A-114

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

Content .. 51 52 53 54 ..