Mitsubishi Lancer Evolution IX. Manual — part 556

TROUBLESHOOTING

HEATER, AIR CONDITIONER AND VENTILATION

55-97

STEP 18. Check the wiring harness between
A-06X condenser fan relay (LO) connector
terminal No.3 and C-121 engine-ECU connector
terminal No.31.

NOTE:

Prior to the wiring harness inspection, check interme-
diate connector A-29 <LHD> or C-31 <RHD>, and
repair if necessary.

• Check the condenser fan relay (HI) earth line for

open or short circuit.

Q: Is the check result normal?

YES :

Go to Step 19.

NO :

Repair the wiring harness.

AC311017AC

Connector: A-06X

Relay box side

AC504617AB

Connector: C-121 <LHD>

C-121 (GR)

Harness side

AC504624AT

Connectors: C-31, C-121 <RHD>

C-121

Harness side

C-121 (GR)

C-31

C-31

AC310542

6

2

5

1

8

7

3 4

Connector: A-29 <LHD>

AB

A-29 (B)

TROUBLESHOOTING

HEATER, AIR CONDITIONER AND VENTILATION

55-98

STEP 19. Check the wiring harness between
A-06X condenser fan relay (LO) connector
terminal No.1 and A-34 condenser fan motor
connector terminal No.2.

• Check the condenser fan motor power supply line

for open circuit.

Q: Is the check result normal?

YES :

The trouble can be an intermittent

malfunction (Refer to GROUP 00, How to
Cope with Intermittent Malfunction

P.00-5

).

NO :

Repair the wiring harness.

STEP 20. Connector check: A-35 condenser fan
motor connector

Q: Is the check result normal?

YES :

Go to Step 21.

NO :

Repair the connector.

AC311017AC

Connector: A-06X

Relay box side

AC310431

Harness side

Connector: A-34 <LHD>

AG

A-34 (B)

AC310433

Harness side

Connector: A-34 <RHD>

AF

A-34 (B)

AC310431

A-35 (GR)

Connector: A-35 <LHD>

Harness side

AH

AC310433

A-35 (GR)

Connector: A-35 <RHD>

Harness side

AG

TROUBLESHOOTING

HEATER, AIR CONDITIONER AND VENTILATION

55-99

STEP 21. Resistance measurement at A-35
condenser fan motor connector.

(1) Disconnect the connector, and measure at the

wiring harness side.

(2) Measure the resistance value between terminal 1

and earth.

OK: 2 ohms or less

Q: Is the check result normal?

YES :

Replace the engine-ECU.

NO :

Go to Step 22.

STEP 22. Check the wiring harness between A-35
condenser fan motor connector terminal No.1
and earth.

• Check the condenser fan motor earth line for

open circuit.

Q: Is the check result normal?

YES :

The trouble can be an intermittent

malfunction (Refer to GROUP 00, How to
Cope with Intermittent Malfunction

P.00-5

).

NO :

Repair the wiring harness.

AC310431

A-35 (GR)

Connector: A-35 <LHD>

Harness side

AH

AC310433

A-35 (GR)

Connector: A-35 <RHD>

Harness side

AG

AC310506

AC310506AO

Connector: A-35
(Harness side)

AC310431

A-35 (GR)

Connector: A-35 <LHD>

Harness side

AH

AC310433

A-35 (GR)

Connector: A-35 <RHD>

Harness side

AG

TROUBLESHOOTING

HEATER, AIR CONDITIONER AND VENTILATION

55-100

DATA LIST REFERENCE TABLE

M1554005100341

Item No.

Check items

Inspection conditions

Normal condition

11

Interior temperature sensor Turn the ignition switch to

the ON position.

Room temperature is the
same as M.U.T.-II/III
displayed temperature.

13

Outside thermo sensor

Turn the ignition switch to
the ON position.

Outside temperature is the
same as M.U.T.-II/III
displayed temperature.

15

Heater water temperature
sensor

Turn the ignition switch to
the ON position.

Heater core wall surface
temperature is the same as
M.U.T.-II/III displayed
temperature.

21

Air thermo sensor

Turn the ignition switch to
the ON position.

Evaporator outlet temperate
is the same as M.U.T.-II/III
displayed temperature

25

Photo sensor

• Turn the ignition switch to

the ON position.

• Change the volume of

insolation.

The volume of insolation
takes inverse proportion with
the M.U.T.-II/III displayed
voltage.

31

Air mixing damper control
motor and potentiometer

• Turn the ignition switch to

the ON position.

• Door position: MAX HOT

Opening angle: approximately
100%

• Turn the ignition switch to

the ON position.

• Door position: MAX

COOL

Opening angle: approximately
0%

32

Mode selection damper
control motor and
potentiometer

• Turn the ignition switch to

the ON position.

• Damper position: FACE

Opening angle: approximately
0%

• Turn the ignition switch to

the ON position.

• Damper position: FOOT

Opening angle: approximately
60%

• Turn the ignition switch to

the ON position.

• Damper position:

FOOT/DEF

Opening angle: approximately
80%

• Turn the ignition switch to

the ON position.

• Damper position: DEF

Opening angle: approximately
100%

42

A/C pressure sensor

Turn the ignition switch to
the ON position.

A/C refrigerant pressure is the
same as M.U.T.-II/III
displayed pressure.