Mitsubishi Colt Ralliart. Manual — part 59
TROUBLESHOOTING
MULTIPORT FUEL INJECTION (MPI) <4A9>
13A-190
STEP 10. Check harness between A-101 (terminal
No. 2) oil feeder control valve connector and
A-114 (terminal No. 52) engine-ECU connector or
engine-CVT-ECU connector.
• Check output line for damage.
Q: Is the check result normal?
YES :
Go to Step 11 .
NO :
Repair the damaged harness wire.
STEP 11. Check the trouble symptoms.
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
).
AK402003
1
2
AC
Connector: A-101
A-101 Harness side
connector
A-101 (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
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46
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48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
L
AD
A-114
Connector:
A-114
Harness side connector
Engine-ECU <M/T> or
engine-CVT-ECU <CVT>
Battery
Main
Index
Group
TOC
TROUBLESHOOTING
MULTIPORT FUEL INJECTION (MPI) <4A9>
13A-191
Code No. P1602: Communication Malfunction (between Engine-ECU <M/T> or Engine-CVT-ECU
<CVT> Main Processor and System LSI)
FUNCTION
• The engine-ECU <M/T> or engine-CVT-ECU
<CVT> checks the communication status for
abnormal conditions.
TROUBLE JUDGMENT
Check Condition
• Ignition switch is "ON" position.
Judgement Criteria
• At abnormal communication with the system LSI
<M/T>.
• The engine-CVT-ECU detects an error in commu-
nication with the throttle actuator control module
for 0.07 second <CVT>.
PROBABLE CAUSE
• Failed engine-ECU <M/T> or engine-CVT-ECU
<CVT>
DIAGNOSIS
STEP 1. Check the trouble symptoms.
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
).
Main
Index
Group
TOC
TROUBLESHOOTING
MULTIPORT FUEL INJECTION (MPI) <4A9>
13A-192
Code No. P1603: Battery Backup Circuit Malfunction
OPERATION
• Power is directly supplied to the engine-ECU
<M/T> or engine-CVT-ECU <CVT> (terminal No.
82) from the battery.
FUNCTION
• The engine-ECU <M/T> or engine-CVT-ECU
<CVT> is check the open circuit of battery
backup line.
TROUBLE JUDGMENT
Check Conditions
• Ignition switch is in "ON" position <M/T>.
• After engine starting sequence is completed
<CVT>.
Judgment Criteria
• Battery backup line voltage is 6 V or lower for 2
seconds <M/T>.
• Battery backup line voltage is 10 V or lower for 2
seconds <CVT>.
AK402698
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
10
AD
Fusible link
R
R-B
82
Battery
backup
Engine-ECU <M/T> or
engine-CVT-ECU <CVT>
10A
Battery Backup Circuit
A-08
19
B-112
J/B
B-108
1
1
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-193
PROBABLE CAUSES
• Open/short circuit in battery backup line circuit or
loose connector contact
• Failed engine-ECU <M/T> or engine-CVT-ECU
<CVT>
DIAGNOSIS PROCEDURE
STEP 1. M.U.T.-III diagnosis code
• Temporarily place the ignition switch in "LOCK"
(OFF) position, and 10 seconds after that, place it
in "ON" position again.
Q: Is the diagnosis code P1603 set?
YES :
Go to Step 2 .
NO :
Intermittent malfunction (Refer to GROUP
00
− How to Use
Troubleshooting/Inspection Service Points
−
How to Cope with Intermittent Malfunctions
).
STEP 2. Perform voltage measurement at A-08
engine-ECU connector or engine-CVT-ECU
connector.
• Disconnect connector, and measure at harness
side.
• Ignition switch: ON
• Voltage between terminal No. 82 and earth.
OK: System voltage
Q: Is the check result normal?
YES :
Go to Step 3 .
NO :
Check intermediate connector B-112 and
B-108, and repair if necessary. If
intermediate connector is normal, check and
repair harness between battery and A-08
(terminal No. 82) engine-ECU connector or
engine-CVT-ECU connector.
• Check power supply line for
open/short circuit.
STEP 3. Check harness between battery and A-08
(terminal No. 82) engine-ECU connector or
engine-CVT-ECU connector.
NOTE: Before checking harness, check intermedi-
ate connector B-108 and B-112, and repair if neces-
sary.
• Check power supply line for 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>
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
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