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 

P.13A-596

).

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

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111

112

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114

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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

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109

110

111

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113

114

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151

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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 ).