Mitsubishi L200. Manual — part 121

TROUBLESHOOTING

DIESEL FUEL

13A-280

STEP 4. Check harness between C-103 (terminal
No. 131) engine-ECU connector and A-47
(terminal No. 1) suction control valve connector.

• Check power supply 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. 146) engine-ECU connector and A-47
(terminal No. 2) suction control valve connector.

• Check earthing 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.

• Reconfirmation of diagnosis code.

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

AK503644

2

1

A-47 (GR)

Harness side
connector

AB

Connector: A-47

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

AK503644

2

1

A-47 (GR)

Harness side
connector

AB

Connector: A-47

TROUBLESHOOTING

DIESEL FUEL

13A-281

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 ).

NO :

Intermittent malfunction (Refer to GROUP
00

− How to Use Troubleshooting/

Inspection Service Points

− How to Cope

with Intermittent Malfunctions ).

Code No. P062F: EEPROM Malfunction <Euro5>

FUNCTION

• To check whether the information such as the idle

learned value and so on is stored in the memory
of engine-ECU.

TROUBLE JUDGMENT

Check Conditions

• Ignition switch is in ON position

Judgement Criterion

• When the abnormal EEPROM memory data is

detected.

PROBABLE CAUSE

• Failed the engine-ECU

DIAGNOSIS

STEP 1. Reconfirmation of diagnosis codes.

Q: Is the check result normal?

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,
carry 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 ).

Code No. P0630: Chassis Number not Programmed

FUNCTION

• The chassis number is stored in the engine-ECU

by the vehicle manufacturer.

TROUBLE JUDGMENT

Check Condition

• Ignition switch is "ON" position.

Judgment Criterion

• The entered chassis number data history is not

found.

PROBABLE CAUSE

• The chassis number is not entered.

• Failed engine-ECU.

DIAGNOSIS PROCEDURE

STEP 1. Check VIN information.

• Set M.U.T.-III to the coding mode for chassis

number information.

Q: Has VIN (current) been written?

YES :

Go to Step 2 .

NO :

Write VIN. Go to Step 3

TROUBLESHOOTING

DIESEL FUEL

13A-282

STEP 2. M.U.T.-III diagnosis code.

• Reconfirm whether the diagnosis code is output.

1. Erase the diagnosis codes being output.
2. Ignition switch: "LOOK" (OFF) to ON.
3. Confirm whether the diagnosis code is output.

Q: Is the diagnosis code output?

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 ).

STEP 3. M.U.T.-III diagnosis code.

• Reconfirm whether the diagnosis code is output.

1. Erase the diagnosis codes being output.
2. Ignition switch: "LOOK" (OFF) to ON.
3. Confirm whether the diagnosis code is output.

Q: Is the diagnosis code output?

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 :

The check is end.

TROUBLESHOOTING

DIESEL FUEL

13A-283

Code No. P0638: Throttle Valve Control Servo Stuck

OPERATION

• The electric current from the engine- ECU (termi-

nal No. 129 and No. 114) to the throttle valve con-
trol servo (terminal No. 5 and No. 6) is controlled.

FUNCTION

• Engine- ECU checks the electronic-controlled

throttle system for abnormal conditions.

TROUBLE JUDGMENT

Check Conditions
The following conditions are met for 3 seconds.

• Battery positive voltage is 6 − 16 V.

• 2 seconds later after the ignition switch has

been in "ON" position.

• The engine static state.

Judgment Criterion

• The difference between the objective and real

openings is 10

° or more for 0.5 second.

PROBABLE CAUSES

• Failed throttle valve return spring

• Failed throttle valve operation

• Failed throttle valve control servo

• Throttle valve control servo circuit harness dam-

age 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