Mitsubishi L200. Manual — part 133
TROUBLESHOOTING
DIESEL FUEL
13A-328
Code No. P2118: Throttle Valve Control (DC Motor) Current Malfunction
OPERATION
• Current supplied from the engine-ECU (terminal
No. 129 and No. 114) to the throttle valve control
servo (terminal No. 5 and No. 6) is adjusted.
FUNCTION
• The throttle valve control servo drive IC in the
engine-ECU monitors current flowing in the throt-
tle control servo and cuts energization if it detects
overcurrent.
TROUBLE JUDGMENT
Check Condition
• Ignition switch is in "ON" position.
Judgment Criterion
• An overcurrent cut-off signal from the throttle
valve control servo drive integrated circuit (IC) is
repeatedly detected for 0.5 second.
PROBABLE CAUSES
• Failed throttle control servo
• Short circuit in throttle valve control servo circuit
or loose connector contact
• Failed engine-ECU
AKA00107
6
1 2 3 4 5
101 102
103104 105 106107 108109 110 111112 113 114115
118119 120 121122 123124 125126127 128 129130
131132 133 134135 136137 138139140 141142 143
146147 148 149150 151152 153154155 156 157158
117
145
116
144
129
5
G-B
G
114
6
A-132
(MU805200)
Throttle valve control servo circuit
C-103
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 SI: Silver
Electronic-controlled
throttle valve
Engine-ECU
AB
TROUBLESHOOTING
DIESEL FUEL
13A-329
DIAGNOSIS PROCEDURE
STEP 1. Connector check: A-132 electronic-
controlled throttle valve connector.
Q: Is the check result normal?
YES :
Go to Step 2 .
NO :
Repair or replace the connector.
STEP 2. Check throttle valve control servo itself
• Check throttle valve control servo itself (Refer to
).
Q: Is the check result normal?
YES :
Go to Step 3 .
NO :
Replace the throttle body assembly.
STEP 3. Connector check: C-103 engine-ECU
connector.
Q: Is the check result normal?
YES :
Go to Step 4 .
NO :
Repair or replace the connector.
AK604705
1
6 5 4 3 2
AB
A-132 (B)
Connector: A-132
Harness side
connector
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-330
STEP 4. Check harness between C-103 (terminal
No. 114) engine-ECU connector and A-132
(terminal No. 6) electronic-controlled throttle
valve connector.
• Check output line for short circuit.
Q: Is the check result normal?
YES :
Go to Step 5 .
NO :
Repair the damaged harness wire.
STEP 5. Check harness between C-103 (terminal
No. 129) engine-ECU connector and A-132
(terminal No. 5) electronic-controlled throttle
valve connector.
• Check output line for short circuit.
Q: Is the check result normal?
YES :
Go to Step 6 .
NO :
Repair the damaged harness wire.
STEP 6. M.U.T.-III diagnosis code.
• After clearing the diagnosis code through M.U.T.-
III, start the engine and confirm whether the diag-
nosis code is output.
Q: Is the diagnosis code set?
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
AK604705
1
6 5 4 3 2
AB
A-132 (B)
Connector: A-132
Harness side
connector
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
AK604705
1
6 5 4 3 2
AB
A-132 (B)
Connector: A-132
Harness side
connector
TROUBLESHOOTING
DIESEL FUEL
13A-331
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 Malfunctions ).
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