Mitsubishi L200. Manual — part 171
TROUBLESHOOTING
DIESEL FUEL
13A-480
YES :
Go to Step 12 .
NO :
Proceed to the inspection procedure by
diagnosis code for the abnormal waveform
(Refer to Inspection Chart for Diagnosis
Code
).
STEP 12. M.U.T.-III actuator test.
• Refer to Actuator Test Reference Table
a. Item 19: Suction control valve
Q: Is the check result normal?
YES :
Go to Step 13 .
NO :
Replace the suction control valve. After
replacing the suction control valve, learn the
supply pump (Refer to GROUP 00
−
Precautions Before Service
− What The
Common Rail Engine Learns ).
STEP 13. Check suction control valve itself.
• Check suction control value itself (Refer to
).
Q: Is the check result normal?
YES :
Go to Step 14 .
NO :
Replace the suction control valve. After
replacing the suction control valve, learn the
supply pump (Refer to GROUP 00
−
Precautions Before Service
− What The
Common Rail Engine Learns ).
STEP 14. M.U.T.-III data list.
• Refer to Data List Reference Table
.
a. Item 63: Rail pressure sensor
b. Item 64: Rail pressure target
Q: Are the check results normal?
YES :
Go to Step 16 .
NO :
Go to Step 15 .
STEP 15. Replace the rail pressure sensor.
• Replace the common-rail assembly.
Q: Does trouble symptom persist?
YES :
Go to Step 18 .
NO :
The procedure is complete.
STEP 16. Check compression pressure.
• Check compression pressure (Refer to GROUP
11A
− On-vehicle Service − Compression Pres-
sure Check ).
Q: Is the check result normal?
YES :
Go to Step 17 .
NO :
Check and repair the engine itself.
STEP 17. Check injector itself.
• Check injector itself (Refer to
).
Q: Is the check result normal?
YES :
Go to Step 18 .
NO :
Replace the injector at the failed cylinder.
After replacing the Injector, register the
injector identification code and learn fuel
injection (Refer to GROUP 00
− Precautions
Before Service
− What The Common Rail
Engine Learns ).
STEP 18. Check the trouble symptoms.
Q: Does trouble symptom persist?
YES :
Replace the engine-ECU. When the engine-
ECU is replaced, write the chassis number
(Refer to GROUP 00
− Precautions Before
Service
− How to Perform Chassis Number
Writing ). After replacing the engine-ECU,
register the injector identification code and
learn fuel injection (Refer to GROUP 00
−
Precautions Before Service
− What The
Common Rail Engine Learns ). After
registering the injector identification code,
the vehicle equipped with the DPF carries
out the forcible DPF regeneration. (Refer to
GROUP 17
− Emission Control − Diesel
Particulate Filter (DPF) System
− Forcible
DPF Regeneration ).
NO :
Intermittent malfunction (Refer to GROUP
00
− How to Use Troubleshooting/
Inspection Service Points
− How to Cope
with Intermittent Malfunction ).
Inspection Procedure 14: Battery rundown <Euro5>
COMMENT ON TROUBLE SYMPTOM
• Failure is possibly caused by failed alternator,
failed generation control circuit or other faults.
PROBABLE CAUSES
• Failed battery
• Open/short circuit or harness damage in alterna-
tor L terminal circuit
• Short circuit in alternator G terminal
TROUBLESHOOTING
DIESEL FUEL
13A-481
• Failed alternator
• Failed engine-ECU
DIAGNOSIS PROCEDURE
STEP 1. Check battery.
• Check battery (Refer to GROUP 54A − Battery −
On-vehicle Service
− Battery Test ).
Q: Is the check result normal?
YES :
Go to Step 2 .
NO :
Replace the battery.
STEP 2. M.U.T.-III diagnosis code.
Q: Is the diagnosis code set?
YES :
Inspection chart for diagnosis code (Refer
to
NO :
Go to Step 3 .
STEP 3. Connector check: A-122 alternator
connector
Q: Is the check result normal?
YES :
Go to Step 4 .
NO :
Repair or replace the connector.
STEP 4. Perform voltage measurement at A-122
alternator connector.
• Disconnect connector, and measure at harness
side.
• Ignition switch: ON
• Voltage between terminal No. 3 and earth.
OK: System voltage
Q: Is the check result normal?
YES :
Go to Step 7 .
NO :
Go to Step 5 .
STEP 5. Connector check: C-111 combination
meter connector
Q: Is the check result normal?
YES :
Go to Step 6 .
NO :
Repair or replace the connector.
AKB00292
M
2
1
3
4
AB
A-122 (GR)
Harness side
connector
Connector: A-122
AKB00292
M
2
1
3
4
AB
A-122 (GR)
Harness side
connector
Connector: A-122
AK700806
62
64
61 60 59 58
63
57
53
54
55
52 51
56
Harness side connector
C-111
C-111
Connector: C-111
<R.H. drive vehicles>
<L.H. drive vehicles>
AB
TROUBLESHOOTING
DIESEL FUEL
13A-482
STEP 6. Check harness between A-122 (terminal
No. 3) alternator connector and C-111 (terminal
No. 52) combination meter connector.
NOTE: Before checking harness, check intermediate
connectors A-27, C-14 <R.H. drive vehicles> and C-
54 <L.H. drive vehicles>, and repair if necessary.
• Check power supply line for open/short circuit.
Q: Is the check result normal?
YES :
Check the combination meter (Refer to
GROUP 54A
− Combination Meter −
Trouble Symptom Chart ).
NO :
Repair the damaged harness wire.
STEP 7. Connector check: C-103 engine-ECU
connector
Q: Is the check result normal?
YES :
Go to Step 8 .
NO :
Repair or replace the connector.
AKB00292
M
2
1
3
4
AB
A-122 (GR)
Harness side
connector
Connector: A-122
AK700806
62
64
61 60 59 58
63
57
53
54
55
52 51
56
Harness side connector
C-111
C-111
Connector: C-111
<R.H. drive vehicles>
<L.H. drive vehicles>
AB
AKA00090
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
146
147
148
149
150
151
152
153
154
155
156
157
158
117
145
116
144
C-103 (B)
C-103 (B)
<R.H. drive vehicles>
Harness side connector
<L.H. drive vehicles>
Connector: C-103
AB
TROUBLESHOOTING
DIESEL FUEL
13A-483
STEP 8. Perform voltage measurement at C-103
engine-ECU connector.
• Disconnect connector, and measure at harness
side.
• Ignition switch: ON
• Voltage between terminal No. 121 and earth.
OK: System voltage
Q: Is the check result normal?
YES :
Go to Step 12 .
NO :
Go to Step 9 .
STEP 9. Check harness between C-103 (terminal
No. 121) engine-ECU connector and A-122
(terminal No. 1) alternator connector.
NOTE: Before checking harness, check intermediate
connectors A-27 and A-115, and repair if necessary.
• Check output line for short circuit.
Q: Is the check result normal?
YES :
Go to Step 10 .
NO :
Repair the damaged harness wire.
AKA00090
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
146
147
148
149
150
151
152
153
154
155
156
157
158
117
145
116
144
C-103 (B)
C-103 (B)
<R.H. drive vehicles>
Harness side connector
<L.H. drive vehicles>
Connector: C-103
AB
AKA00090
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
146
147
148
149
150
151
152
153
154
155
156
157
158
117
145
116
144
C-103 (B)
C-103 (B)
<R.H. drive vehicles>
Harness side connector
<L.H. drive vehicles>
Connector: C-103
AB
AKB00292
M
2
1
3
4
AB
A-122 (GR)
Harness side
connector
Connector: A-122
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