Mitsubishi Lancer Evolution IX. Manual — part 555

TROUBLESHOOTING

HEATER, AIR CONDITIONER AND VENTILATION

55-93

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 10.

NO :

Repair the wiring harness.

STEP 10. Check the wiring harness between
A-07X condenser fan relay (HI) connector
terminal No.1 and A-34 condenser fan motor
connector terminal No.1.

• 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 11. Voltage measurement at A-34
condenser fan motor connector.

(1) Remove the relay, and measure at the relay box

side.

AC310542

6

2

5

1

8

7

3 4

Connector: A-29 <LHD>

AB

A-29 (B)

AC311017AB

Connector: A-07X

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)

TROUBLESHOOTING

HEATER, AIR CONDITIONER AND VENTILATION

55-94

(2) Turn the ignition switch to the "ON" position.

(3) Disconnect engine-ECU connector C-121, and

earth terminal 31.

(4) Measure the voltage between terminal 2 and

body earth.

OK: System voltage

Q: Is the check result normal?

YES :

Go to Step 20.

NO :

Go to Step 12.

STEP 12. Connector check: A-06X condenser fan
relay (LO) connector

Q: Is the check result normal?

YES :

Go to Step 13.

NO :

Repair the connector.

STEP 13. Check the condenser fan relay (LO)
continuity.
Refer to

P.55-107

.

Q: Is the condenser fan relay (LO) in good condition?

YES :

Go to Step 14.

NO :

Replace the condenser fan relay (LO).

STEP 14. Voltage measurement at A-06X
condenser fan relay (LO) connector.

(1) Remove the relay, and measure at the relay box

side.

AC504617AB

Connector: C-121 <LHD>

C-121 (GR)

Harness side

AC504618AB

Connector: C-121 <RHD>

Harness side

C-121 (GR)

AC504964

AC504964

Connector: C-121
(Harness side)

AB

AC310507

Connector: A-34
(Harness side)

AL

AC311017AC

Connector: A-06X

Relay box side

AC311017AC

Connector: A-06X

Relay box side

TROUBLESHOOTING

HEATER, AIR CONDITIONER AND VENTILATION

55-95

(2) Turn the ignition switch to the "ON" position.

(3) Measure the voltage between terminal 2 and

body earth.

OK: System voltage

Q: Is the check result normal?

YES :

Go to Step 16.

NO :

Go to Step 15.

STEP 15. Check the wiring harness between
A-06X condenser fan relay (LO) connector
terminal No.2 and C-129 intermediate connector
terminal No.2.

• Check the condenser fan relay (LO) power sup-

ply 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.

AC310507AM

Connector: A-06X
(Relay box side)

1

3

2

4

AC311017AC

Connector: A-06X

Relay box side

AC310446

Connector: C-129
<LHD>

AI

AC310454

Connector: C-129
<RHD>

AJ

TROUBLESHOOTING

HEATER, AIR CONDITIONER AND VENTILATION

55-96

STEP 16. Voltage measurement at A-06X
condenser fan relay (LO) connector.

(1) Remove the relay, and measure at the relay box

side.

(2) Measure the voltage between terminal 4 and

body earth.

OK: System voltage

Q: Is the check result normal?

YES :

Go to Step 18.

NO :

Go to Step 17.

STEP 17. Check the wiring harness between
A-06X condenser fan relay (LO) connector
terminal No.4 and the battery.

• Check the condenser fan relay (HI) 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.

AC311017AC

Connector: A-06X

Relay box side

AC310507AN

Connector: A-06X
(Relay box side)

1

3

2

4

AC311017AC

Connector: A-06X

Relay box side