Mitsubishi 380. Manual — part 233

ENGINE COOLING DIAGNOSIS

ENGINE COOLING

14-16

STEP 19. Check the harness wire between fan controller
connector A-24 terminal 1 and body earth.

Q: Is the harness wire in good condition?

YES : An intermittent malfunction is suspected (Refer to

GROUP 00 - How to use troubleshooting

00-7

).

NO : Repair the damaged harness wire. Then go to Step

24.

04DB008A

1

2

3

A-24

Connector: A-24

ENGINE COOLING DIAGNOSIS

ENGINE COOLING

14-17

STEP 20. Check the fan controller connector A-24,
intermediate connector A-13 and engine-ECU connector
B-21.

Q: Are these connectors in good condition?

YES : Go to Step 21.
NO : Repair or replace the connector. Then go to Step 24.

04DB008A

1

2

3

A-24

Connector: A-24

AK303148

CONNECTOR: A-13

AB

A-13(GR)

16DB400A

COVER

ENGINE

CONTROL

UNIT

AIR

CLEANER

ENGINE COOLING DIAGNOSIS

ENGINE COOLING

14-18

STEP 21. Check the harness wire between fan controller
connector A-24 terminal 2 and engine-ECU connector B-21
terminal 71.

Q: Are these harness wires in good condition?

YES : Go to Step 22.
NO : Repair the damaged harness wire. Then go to Step

24.

04DB008A

1

2

3

A-24

Connector: A-24

16DB400A

COVER

ENGINE

CONTROL

UNIT

AIR

CLEANER

ENGINE COOLING DIAGNOSIS

ENGINE COOLING

14-19

STEP 22. Check the fan controller.

(1) Disconnect fan controller connector A-24.

(2) Back out connector terminal pin 2 from connector housing.
(3) Reconnect the connector with connector terminal pin 2 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 2

disconnected)

(6) Check for the cooling fan operation.

• Using a suitable probe connect the fan controller termi-

nal 2 at controller side to earth.The cooling fan stops.
(When pin 2 of fan controller is connected to earth)

(7) Turn the ignition switch to the "OFF" position.
(8) Disconnect fan controller connector A-24, and re-locate

connector terminal pin 2 into connector housing.

(9) Reconnect the connector with connector terminal pin 2

installed correctly.

Q: Does the cooling fan rotate? And when the fan

controller pin 2 is connected to the body earth, does
the cooling fan stop?
YES : Go to Step 23.
NO : Replace the fan motor and fan controller (Refer to

14-25

). Then go to Step 24.

16DB400A

COVER

ENGINE

CONTROL

UNIT

AIR

CLEANER

04DB008A

1

2

3

A-24

Connector: A-24