Mitsubishi L200. Manual — part 59

TROUBLESHOOTING

DIESEL FUEL

13A-32

STEP 5. 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?

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-33

Code No. P0047: Variable Geometry Control Solenoid Valve Circuit Low Input <Euro5>

OPERATION

• Power is supplied to the variable geometry con-

trol solenoid valve (terminal No. 2) from the
engine control relay (terminal No. 3).

• The engine-ECU (terminal No. 17) makes the

power transistor in the unit be in "ON" position,
and that makes currents go on the variable
geometry control solenoid valve (terminal No. 1).

AKA00128

1

2

3
4

1 2

1

2

3

4

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43 44 45 46 47 48

73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96

Engine control relay

A-20X

17

Engine-ECU

Variable geometry
control solenoid valve

1

2

Variable geometry control solenoid valve circuit

R

W-R

C-105

To engine-ECU

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

10

20A

Fusible link

Relay
box

W-R

W-B

W-B

W-B

23

3

2

OFF

ON

4

1

A-115

3

A-56

AD

TROUBLESHOOTING

DIESEL FUEL

13A-34

FUNCTION

• The variable geometry control solenoid valve

controls the vacuum pressure introduced into the
variable geometry actuator, using the signal from
the engine-ECU. This allows the boost pressure
to be adequate for the driving conditions.

TROUBLE JUDGMENT

Check Conditions

• Battery positive voltage is 8 − 16 V.

• 2 seconds later after the engine has started up.

Judgment Criterion

• Variable geometry control solenoid valve output

voltage is 0.4 V or less (driving current is abnor-
mally low).

PROBABLE CAUSES

• Failed variable geometry control solenoid valve

• Open/short circuit or harness damage in variable

geometry control solenoid valve circuit or loose
connector contact

• Failed engine-ECU

DIAGNOSIS PROCEDURE

STEP 1. M.U.T.-III actuator test

• Item 36: Variable geometry control solenoid valve

OK: The variable geometry actuator is oper-
ated

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-56 variable
geometry control solenoid valve connector

Q: Is the check result normal?

YES :

Go to Step 3 .

NO :

Repair or replace the connector.

STEP 3. Perform resistance measurement at A-56
variable geometry control solenoid valve
connector.

• Disconnect connector, and measure at solenoid

valve side.

• Resistance between terminal No. 1 and No. 2.

OK: 10

− 14 Ω (at 20°C)

Q: Is the check result normal?

YES :

Go to Step 4 .

NO :

Replace the variable geometry control
solenoid valve.

STEP 4. Perform voltage measurement at A-56
variable geometry control solenoid valve
connector.

• Disconnect connector, and measure at harness

side.

• Ignition switch: ON

• Voltage between terminal No. 2 and earth.

OK: System voltage

Q: Is the check result normal?

YES :

Go to Step 6 .

NO :

Go to Step 5 .

AK900982

2 1

AC

A-56 (BR)

Harness side
connector

Connector: A-56

AK900982

2 1

AC

A-56 (BR)

Harness side
connector

Connector: A-56

AK900982

2 1

AC

A-56 (BR)

Harness side
connector

Connector: A-56

TROUBLESHOOTING

DIESEL FUEL

13A-35

STEP 5. Connector check: A-20X engine control
relay connector

Q: Is the check result normal?

YES :

Check and repair harness between A-56

(terminal No. 2) variable geometry control
solenoid valve connector and A-20X
(terminal No. 3) engine control relay
connector.

• Check power supply line open/short

circuit

NO :

Repair or replace the connector.

STEP 6. Perform voltage measurement at C-105
engine-ECU connector.

• Disconnect connector, and measure at harness

side.

• Ignition switch: ON

• Voltage between terminal No. 17 and earth.

OK: System voltage

Q: Is the check result normal?

YES :

Go to Step 8 .

NO :

Go to Step 7 .

AK501321

2

1

3
4

Relay box's side
connector

A-20X

Connector: A-20X

AC

AK900982

2 1

AC

A-56 (BR)

Harness side
connector

Connector: A-56

AKA00089

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96

C-105 (B)

C-105 (B)

<R.H. drive vehicles>

Harness side connector

<L.H. drive vehicles>

Connector: C-105

AB