Mitsubishi L200. Manual — part 122

TROUBLESHOOTING

DIESEL FUEL

13A-284

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 electronic-controlled throttle
valve.

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-285

STEP 4. Check harness between electronic-
controlled throttle valve connector and engine-
ECU connector.

a. Check harness between A-132 (terminal No.5)

electronic-controlled throttle valve connector and
C-103 (terminal No.129) engine-ECU connector.

b. Check harness between A-132 (terminal No.6)

electronic-controlled throttle valve connector and
C-103 (terminal No.114) engine-ECU connector.

• Check output line for damage.

Q: Are the check results normal?

YES :

Go to Step 5 .

NO :

Repair the damaged harness wire.

STEP 5. Replace the electronic-controlled
throttle valve assembly.

• After replace the electronic-controlled throttle

valve assembly, re-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 :

Check end.

Code No. P0642: Analog Sensor Reference Voltage No. 1 Too Low

FUNCTION

• The engine-ECU applies 5 V to the accelerator

pedal position sensor (main).

• The engine-ECU checks whether the supply volt-

age is within the specified range.

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-286

TROUBLE JUDGMENT

Check Conditions

• Battery positive voltage is 8 − 16 V

• 2 seconds later after the ignition switch has been

in "ON" position or the engine has started up

Judgment Criterion

• The detected voltage of analog sensor reference

voltage No. 1 is 4.86 V or less for 0.5 second.
[Power supply for accelerator pedal position sen-
sor (main)]

PROBABLE CAUSE

• Failed engine-ECU

DIAGNOSIS PROCEDURE

STEP 1. M.U.T.-III diagnosis code

• After erasing the diagnosis code through M.U.T.-

III, ignition switch is "ON" position and confirm
whether the diagnosis code is output.

Q: Is the diagnosis code set?

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 ).

Code No. P0643: Analog Sensor Reference Voltage No. 1 Too High

FUNCTION

• The engine-ECU applies 5 V to the accelerator

pedal position sensor (main).

• The engine-ECU checks whether the supply volt-

age is within the specified range.

TROUBLE JUDGMENT

Check Conditions

• Battery positive voltage is 8 −16 V

• 2 seconds later after the ignition switch has been

in "ON" position or the engine has started up

Judgment Criterion

• The detected voltage of analog sensor reference

voltage No. 1 is 5.14 V or more for 0.5 second.
[Power supply for accelerator pedal position sen-
sor (main)]

PROBABLE CAUSE

• Failed engine-ECU

DIAGNOSIS PROCEDURE

STEP 1. M.U.T.-III diagnosis code

• After erasing the diagnosis code through M.U.T.-

III, ignition switch is "ON" position and confirm
whether the diagnosis code is output.

Q: Is the diagnosis code set?

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 ).

TROUBLESHOOTING

DIESEL FUEL

13A-287

Code No. P064C: Glow Control Unit Malfunction <Euro5>

1

2

3
4

1

1

1

1

AKB00259

Wire colour code
B: Black LG: Light green G: Green L: Blue W: White Y: Yellow SB: Sky blue BR: Brown O: Orange GR: Grey
R: Red P: Pink V: Violet PU: Purple SI: Silver

W

Glow System Circuit

Engine control relay

Glow control unit

A-20X

R

To engine-ECU

10

20A

Fusible link

Relay
box

W-R

W-B

W-B

W-B

23

Fusible link 24

2

3

6

1

9

120

126

7

1

2

3

4

2

Y

Y

B

GR-R

LG-R

L

BR-Y

G

G-R

R

L-B

1

4

3

A-150

1

A-153

C-103

Engine-
ECU

No.1
Glow plug

No.2
Glow plug

No.3
Glow plug

No.4
Glow plug

A-154

A-155

A-156

1

1

1

GND

10

OFF

ON

1

4

A-115

A-151

3

AB