Mitsubishi Outlander (2003+). Manual — part 125

TROUBLESHOOTING

ENGINE COOLING

14-11

STEP 21. Check the harness wire between fan
controller connector A-20 terminal 2 and
engine-ECU or engine-A/T-ECU connector C-134
terminal 21 <4G63> or C-139 terminal 17 <4G69>.

Q: Are these harness wires in good condition?

YES :

Go to Step 22.

NO :

Repair the damaged harness wire. Then go
to Step 24.

STEP 22. Check the fan controller.

(1) Disconnect engine-ECU connector or

engine-A/T-ECU connector C-134 <4G63> or
C-139 <4G69>.

(2) Pull out connector terminal pin 21 <4G63> or 17

<4G69> to disconnect connector.

(3) Reconnect the connector with connector terminal

pin still removed.

(4) Turn the ignition switch to the "ON" position.
(5) Check for the cooling fan operation.

•

The cooling fan rotates. (with connector
terminal pin 21 <4G63> or 17 <4G69>
disconnected)

•

The cooling fan stops. (When connector
terminal pin 21 <4G63> or 17 <4G69> is
connected to the body earth.)

(6) Turn the ignition switch to the "OFF" position.

AC301902

3

2

1

A-20

Connector: A-20

AB

AC309503

Connectors: C-134 , C-139

: 4G63
: 4G69

<L.H. drive vehicles>

<R.H. drive vehicles>

C-134
C-139

C-139

C-134 Harness side

C-139(GR) Harness side

AB

AC309503

Connectors: C-134 , C-139

: 4G63
: 4G69

<L.H. drive vehicles>

<R.H. drive vehicles>

C-134
C-139

C-139

C-134 Harness side

C-139(GR) Harness side

AB

AC309522

C-139 connector <4G69>
(Harness side connector: ECU side view)

AB

C-134 connector <4G63>
(Harness side connector: ECU side view)

TROUBLESHOOTING

ENGINE COOLING

14-12

(7) Disconnect engine-ECU connector or

engine-A/T-ECU connector C-134 <4G63> or
C-139 <4G69>, and push in connector terminal
pin 21 <4G63> or 17 <4G69> to disconnect
connector.

(8) Reconnect the connector with connector terminal

pin still installed.

Q: Does the cooling fan rotate? And when the

connector terminal pin is connected to the body
earth, does the cooling fan stop?

YES :

Go to Step 23.

NO :

Replace the fan controller (Refer to

P.14-29

). Then go to Step 24.

STEP 23. MUT-II/III self-diag code

Check if an MPI system self-diag code is set. (Refer
to GROUP 13A - Trouble shooting

P.13A-9

) <4G63>

or (Refer to GROUP 13B - Trouble shooting

P.13B-10

) <4G69>.

Q: Diagnosis code set?

YES :

Inspection chart for diagnosis code (Refer

to GROUP 13A - Trouble shooting

P.13A-16

) <4G63> or Inspection chart for

diagnosis code (Refer to GROUP 13B -
Trouble shooting

P.13B-20

) <4G69>.

NO :

Replace the engine-ECU <M/T> or
engine-A/T-ECU <A/T> (Refer to GROUP
13A, Engine-ECU

P.13A-343

) <4G63> or

(Refer to GROUP 13B, Engine-ECU and
Engine-A/T-ECU

P.13B-439

) <4G69>. Then

go to Step 24.

STEP 24. Check the symptoms.

Q: Does the radiator fan motor and the condenser fan

motor operate correctly?

YES :

This symptoms is complete.

NO :

Return to Step 1.

INSPECTION PROCEDURE 2: Radiator Fan and Condenser Fan do not Change Speed or Stop

Radiator Fan and Condenser Fan Drive Circuit
Refer to

P.14-4

.

TECHNICAL DESCRIPTION

•

The cause could be a malfunction of the fan
controller power supply or earth circuit.

•

If the communication line wiring harness between
the fan controller and the engine-ECU <M/T> or
engine-A/T-ECU <A/T> is short-circuited to earth,
the radiator fan motor and the condenser fan
motor will not rotate.

•

The cause could also be a malfunction of input
signal from the A/C switch, the water temperature
sensor unit and the vehicle speed sensor <M/T>
or the output shaft speed sensor <A/T> to the
engine-ECU <M/T> or engine-A/T-ECU <A/T>.

•

The cause could also be a malfunction of the fan
controller or the engine-ECU <M/T> or
engine-A/T-ECU <A/T>.

TROUBLESHOOTING HINTS

•

Malfunction of fusible link No.2

•

Malfunction of fan control relay

•

Malfunction of cooling fan motor

•

Malfunction of fan controller

•

Malfunction of engine-ECU <M/T> or
engine-A/T-ECU <A/T>

•

Damaged wiring harness or connector

DIAGNOSIS

STEP 1. Check the fan control relay.

Refer to

P.14-19

.

Q: Is the fan control relay in good condition?

YES :

Go to Step 2.

NO :

Replace the fan control relay. Then go to
Step 8.

STEP 2. Check the fan control relay connector
A-10X.

Q: Is the connector in good condition?

YES :

Go to Step 3.

NO :

Repair the connector or replace the relay
box. Then go to Step 8.

AC309505 AC

Fan control relay

Relay box

Connector: A-10X

A-10X

TROUBLESHOOTING

ENGINE COOLING

14-13

STEP 3. Check the harness wire between fan
control relay connector A-10X terminal 2 and fan
controller connector A-20 terminal 3.

Q: Is the harness wire in good condition?

YES :

Go to Step 4.

NO :

Repair the damaged harness wire. Then go
to Step 8.

STEP 4. Check the fan controller connector A-20,
intermediate connector A-14 and engine-ECU
connector or engine-A/T-ECU connector C-134
<4G63> or C-139 <4G69>.

Q: Are these connectors in good condition?

YES :

Go to Step 5.

NO :

Repair or replace the connector. Then go to
Step 8.

AC309505 AC

Fan control relay

Relay box

Connector: A-10X

A-10X

AC301902

3

2

1

A-20

Connector: A-20

AB

AC301902

3

2

1

A-20

Connector: A-20

AB

AC309506

Connector: A-14

A-14(GR)

A-14(GR)

AB

AC309503

Connectors: C-134 , C-139

: 4G63
: 4G69

<L.H. drive vehicles>

<R.H. drive vehicles>

C-134
C-139

C-139

C-134 Harness side

C-139(GR) Harness side

AB

TROUBLESHOOTING

ENGINE COOLING

14-14

STEP 5. Check the harness wire between fan
controller connector A-20 terminal 2 and
engine-ECU connector or engine-A/T-ECU
connector C-134 terminal 21 <4G63> or C-139
terminal 17 <4G69>.

Q: Are these harness wires in good condition?

YES :

Go to Step 6.

NO :

Repair the damaged harness wire. Then go
to Step 8.

STEP 6. Check the fan controller.

(1) Disconnect engine-ECU connector or

engine-A/T-ECU connector C-134 <4G63> or
C-139 <4G69>.

(2) Pull out connector terminal pin 21 <4G63> or 17

<4G69> to disconnect connector.

(3) Reconnect the connector with connector terminal

pin still removed.

(4) Turn the ignition switch to the "ON" position.
(5) Check for the cooling fan operation.

•

The cooling fan rotates. (with connector
terminal pin 21 <4G63> or 17 <4G69>
disconnected)

•

The cooling fan stops. (When connector
terminal pin21 <4G63> or 17 <4G69> is
connected to the body earth.)

(6) Turn the ignition switch to the "OFF" position.

AC301902

3

2

1

A-20

Connector: A-20

AB

AC309503

Connectors: C-134 , C-139

: 4G63
: 4G69

<L.H. drive vehicles>

<R.H. drive vehicles>

C-134
C-139

C-139

C-134 Harness side

C-139(GR) Harness side

AB

AC309503

Connectors: C-134 , C-139

: 4G63
: 4G69

<L.H. drive vehicles>

<R.H. drive vehicles>

C-134
C-139

C-139

C-134 Harness side

C-139(GR) Harness side

AB

AC309522

C-139 connector <4G69>
(Harness side connector: ECU side view)

AB

C-134 connector <4G63>
(Harness side connector: ECU side view)