Mitsubishi Lancer Evolution IX. Manual — part 553
![](/vehicles/winoney/wruvea/ger/wakentha.png)
TROUBLESHOOTING
HEATER, AIR CONDITIONER AND VENTILATION
55-85
STEP 11. Check the wiring harness between
C-121 engine-ECU connector terminal No.20 and
B-13X A/C compressor relay connector terminal
No.3.
• Check the A/C compressor relay earth line for
open or short 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
NO :
Repair the wiring harness.
AC504760AB
Connector: B-13X
Front of
vehicle
1
3
2
4
Relay box side
AC504617AB
Connector: C-121 <LHD>
C-121 (GR)
Harness side
AC504618AB
Connector: C-121 <RHD>
Harness side
C-121 (GR)
![](/vehicles/winoney/wruvea/ger/henaithacack.png)
TROUBLESHOOTING
HEATER, AIR CONDITIONER AND VENTILATION
55-86
Inspection Procedure 11: Condenser Fan does not Operate.
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
IGNITION
SWITCH (IG2)
BATTERY
RELAY
BOX
CONDENSER
FAN RELAY (HI)
CONDENSER
FAN MOTOR
ENGINE-ECU
CONDENSER
FAN RELAY (LO)
Condenser Fan Motor Circuit
NOTE
: LH drive vehicles
: RH drive vehicles
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TROUBLESHOOTING
HEATER, AIR CONDITIONER AND VENTILATION
55-87
CIRCUIT OPERATION
If the condenser fan motor does not operate, the
condenser fan relay circuit system or the earth sys-
tem of the condenser fan motor is suspected.
PROBABLE CAUSES
• Malfunction of the condenser fan relay (HI)
• Malfunction of the condenser fan relay (LO)
• Malfunction of the condenser fan motor
• Malfunction of the engine-ECU
• Damaged the wiring harness or connectors
DIAGNOSIS PROCEDURE
STEP 1. Connector check: A-34 condenser fan
motor connector and C-121 engine-ECU
connector
Q: Is the check result normal?
YES :
Go to Step 2.
NO :
Repair the connector.
AC310431
Harness side
Connector: A-34 <LHD>
AG
A-34 (B)
AC310433
Harness side
Connector: A-34 <RHD>
AF
A-34 (B)
AC504617AB
Connector: C-121 <LHD>
C-121 (GR)
Harness side
AC504618AB
Connector: C-121 <RHD>
Harness side
C-121 (GR)
![](/vehicles/winoney/wruvea/ger/kal.png)
TROUBLESHOOTING
HEATER, AIR CONDITIONER AND VENTILATION
55-88
STEP 2. Voltage measurement at A-34 condenser
fan motor connector.
(1) Remove the relay, and measure at the relay box
side.
(2) Turn the ignition switch to the "ON" position.
(3) Disconnect engine-ECU connector C-121, and
earth terminal 30.
(4) Measure the voltage between terminal 1 and
body earth.
OK: System voltage
Q: Is the check result normal?
YES :
Go to Step 11.
NO :
Go to Step 3.
AC310431
Harness side
Connector: A-34 <LHD>
AG
A-34 (B)
AC310433
Harness side
Connector: A-34 <RHD>
AF
A-34 (B)
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)
AI
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