Mitsubishi L200. Manual — part 118

TROUBLESHOOTING

DIESEL FUEL

13A-268

STEP 1. M.U.T.-III data list.

• Refer to Data List Reference Table

P.13A-542

.

a. Item 75: Power steering fluid pressure switch

Q: Is the check result normal?

YES :

Intermittent malfunction (Refer to GROUP

00

− How to Use Troubleshooting/

Inspection Service Points

− How to Cope

with Intermittent Malfunctions ).

NO :

Go to Step 2

STEP 2. Connector check: A-134 power steering
pressure switch connector

Q: Is the check result normal?

YES :

Go to Step 3 .

NO :

Repair or replace the connector.

STEP 3. Check power steering pressure switch
itself.

• Disconnect A-134 power steering fluid pressure

switch connector.

• Continuity between terminal No.1 and earth.

OK: No continuity

Q: Is the check result normal?

YES :

Replace the power steering fluid pressure

switch.

NO :

Go to Step 4 .

STEP 4. Check at A-134 power steering fluid
pressure switch connector.

• Disconnect connector, and measure at harness

side.

• Ignition switch: ON

• Voltage between terminal No.1 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-103 engine-ECU
connector

Q: Is the check result normal?

YES :

Go to Step 6 .

NO :

Repair or replace the connector.

AK501383

1

Harness side
connector

Connector: A-134

A-134 (B)

AB

AK501383

1

Harness side
connector

Connector: A-134

A-134 (B)

AB

AKA00090

101

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110

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114

115

118

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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-269

STEP 6. Check harness between C-103 (terminal
No. 127) engine-ECU connector and A-134
(terminal No. 1) power steering fluid pressure
switch 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 :

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 :

Repair the damaged harness wire.

STEP 7. M.U.T.-III data list.

• Refer to Data List Reference Table

P.13A-542

.

a. Item 75: Power steering fluid pressure switch

Q: Is the check result normal?

YES :

Intermittent malfunction (Refer to GROUP

00

− How to Use Troubleshooting/

Inspection Service Points

− How to Cope

with Intermittent Malfunctions ).

NO :

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 ).

Code No. P0603: EEPROM Malfunction <Except 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

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

AK501383

1

Harness side
connector

Connector: A-134

A-134 (B)

AB

TROUBLESHOOTING

DIESEL FUEL

13A-270

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 ).

NO :

Intermittent malfunction (Refer to GROUP
00

− How to Use Troubleshooting/

Inspection Service Points

− How to Cope

with Intermittent Malfunctions ).

Code No. P0604: Random Access Memory (RAM) Malfunction

FUNCTION

• The engine-ECU writes information to RAM or

reads information from RAM.

• The engine-ECU performs an initial check to

detect errors in RAM.

TROUBLE JUDGMENT

Check Condition

• Ignition switch is in "ON" position.

Judgment Criterion

• A destroyed RAM is detected by engine-ECU ini-

tial check.

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. P0605: Read Only Memory (FLASH ROM) Malfunction

FUNCTION

• The engine-ECU reads information from flash

ROM.

• The engine-ECU detects checksum errors.

TROUBLE JUDGMENT

Check Condition

• Ignition switch is in "ON" position.

Judgment Criterion

• In each inspection target area of a flash ROM, a

checksum mismatch is detected three times con-
secutively.

TROUBLESHOOTING

DIESEL FUEL

13A-271

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. P0606: Engine-ECU (main CPU) Malfunction

FUNCTION

• The engine-ECU check whether the microcom-

puter, which performs the drive control of the
throttle valve, is normal.

TROUBLE JUDGMENT

Check Condition

• Ignition switch is in "ON" position

Judgment Criterion

• The monitoring microcomputer detects a main

microcomputer error.

PROBABLE CAUSE

• Failed engine-ECU

DIAGNOSIS

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

• Reconfirmation of diagnosis code.

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. P0607: Engine-ECU (sub CPU) Malfunction

FUNCTION

• The main microcomputer detects errors in the

sub microcomputer used for monitoring.