to pair MITSUBISHI LANCER EVOLUTION 2007 Service Repair Manual

SWS -Troubleshooting54B-28
Inspection Procedure J-4
No fog lamp switch signal input to ETACS-ECU.
Probable cause
When the rear fog lamp switch input signal fault occurs, the rear fog lamp
switch signal is not transmitted to the SWS communication line.DRear fog lamp switch inoperative
DETACS-ECU fault
DHarness or connector fault
NG
RepairOK
Check and repair the harness from the rear fog lamp switch
to the body earth.
NG
Replace ETACS-ECU.
OK
OK
Check the harness from the rear fog lamp switch to
ETACS-ECU.NG
Repair
OK
Check the following connectors:C-137, C-227NG
Repair
OK
Measure at the rear fog lamp switch connector C-137.
DDisconnect the connector and test on the harness side.
DContinuity between terminal 6 and body earth
OK :Continuity confirmed.NGCheck the following connectors:
C-137, C-102
C-137, C-08
Check the rear fog lamp switch (Refer to GROUP 54A - Rear
Fog Lamp).NG
Replace
Check the trouble symptoms.

SWS -Troubleshooting54B-29
Inspection Procedure J-5
No driver’s door switch signal input to ETACS-ECU.
Probable cause
No door switch signals input to ETACS-ECU.
Driver’s door switch
As the driver’s door switch input signal is used to control the operation of the
following functions, any abnormality in this signal prevents these functions
operating normally.
DLights left ON reminder warning function
DPower window timer function
DHeadlamp automatic cut-off function
DRoom lamps
Door switches
As the door switch input signals are used to control the operation of the
following functions, any abnormality in these signals prevents the functions
operating normally.
DRoom lampsDDoor switch fault
DETACS-ECU fault
DHarness or connector fault
OK
Replace ETACS-ECU.
NG
Check the harness between the door switches and
ETACS-ECU.NG
Repair
OK
Check the trouble symptoms.
OK
Check the following connectors:
D-13, C-133, C-213, C-226
D-01, C-217, C-226
D-08, C-133, C-213, C-226
D-06, C-217, C-226NG
Repair
OK
Check the connection of the door switches to the body.NG
Repair
Check door switches (Refer to GROUP 42 - Doors).NG
Replace

SWS -Troubleshooting54B-30
Inspection Procedure J-6
No driver’s door lock actuator signal input to ETACS-ECU.
Probable cause
As the driver’s door lock actuator input signal is used to control the operation of
the following functions, any abnormality in this signal prevents these functions
operating normally.
DCentral lockingDDriver’s door lock actuator fault
DETACS-ECU fault
DHarness or connector fault
NG
Repair
NG
Check the harness between the driver’s door lock actuator
and earth.
NG
Repair
OK
Replace ETACS-ECU.
NG
Check the harness between the driver’s door lock actuator
and the ETACS-ECU.NG
Repair
OK
Check the trouble
symptoms.
OK
Check the following connectors:
E-08, C-24, C-227
E-18, C-110, C-227
OK
Check the trouble
symptoms.
OK
Measure at the driver’s door lock actuator connector
DDisconnect the connector and test on the harness side.
E-08
DContinuity between terminal 1 and body earth.
OK :Continuity confirmed.
E-18
DContinuity between terminal 3 and body earth.
OK :Continuity confirmed.NGCheck the following connectors:
E-08, C-24
E-18, C-110
Check driver’s door lock actuator (Refer to GROUP 42 -
Doors).NG
Replace

SWS -Troubleshooting54B-32
Inspection Procedure J-9
No power window main switch signal input to ETACS-
ECU.
Probable cause
The power window main switch input signal is generated to check the individual
switch position of the power window main switch, and the communication status
for ETACS-ECU. Any communication line abnormality stops the following
functions operating normally.
DPower windowsDPower window main switch fault
DETACS-ECU fault
DHarness or connector fault
Check the trouble
symptoms.NGReplace ETACS-ECU.
NG
Repair
NG
Repair
OK
Replace power window
main switch.
NG
Repair
NG
Check the harness between the power window main switch
and the power window relay, and repair if necessary.
NG
Repair
NG
Check the harness between the power window main switch
and the body earth, and repair if necessary.
OK
Replace power window main switch.
OK
Check the trouble
symptoms.
(2) NG
Check the following connectors:
E-07, C-24
E-07, C-110
OK
Check the trouble
symptoms.
NO
Measure at the power window main switch E-07.
DDisconnect the connector and test on the harness side.
DIgnition switch: ON
(1) Voltage between terminal 6 and the body earth.
OK :System voltage
(2) Continuity between terminal 9 and the body earth.
OK :Continuity confirmed.(1) NGCheck the following connectors:
E-07, C-24, C-228
E-07, C-110, C-210, C-228
NG
Check the harness between the power window main switch
and ETACS-ECU.
OK
Check the trouble
symptoms.
Can the power windows operate off the power window main
switch?YESCheck the following connectors:
E-07, C-24, C-102, C-228
E-07, C-110, C-102, C-228

SWS -Troubleshooting54B-33
Inspection Procedure K-1
When the ignition switch is in the LOCK (OFF) position,
no functions work normally.
Probable cause
Checking of the ETACS-ECU battery power supply circuit
system.Probable cause
As a fault in this circuit disables ETACS-ECU functions when the ignition switch
is in the LOCK (OFF) position, any abnormality in this signal prevents the
following functions operating.
DLights left ON reminder warning function
DPower window timer function
DHeadlamp automatic cut-off function
Or, the following functions operate when the ignition switch is in the ON position
only.
DDiagnosis code reading and input signal check by MUT-II.
DCentral locking
DHeadlamps, tail lamps
DHazard lamps
DRoom lampsDETACS-ECU fault
DHarness or connector fault
NG
RepairNG
Check the harness between ETACS-ECU and battery and
repair if necessary.
OK
Replace ETACS-ECU.
OK
Check the trouble
symptoms.
Measure at ETACS-ECU connector C-226.
DDisconnect the connector and test on the junction box
side.
DVoltage between terminal 20 and body earth.
OK :System voltageNGCheck the following connectors:
C-226, C-209, C-05, C-135

55-1
HEATER, AIR
CONDITIONER AND
VENTILATION
CONTENTS
SERVICE SPECIFICATIONS 2.................
LUBRICANTS 2..............................
SPECIAL TOOLS 2...........................
TROUBLESHOOTING 3.......................
ON-VEHICLE SERVICE 14....................
Refrigerant Level Test through Performance Test 14.
Magnetic Clutch Test 14.........................
Receiver Drier Test 14..........................
Compressor Drive Belt Adjustment 15.............
Dual Pressure Switch Check 15..................
Charging 16...................................
Correcting Low Refrigerant Level in case the Service
can used 18...................................
Discharging System 19..........................
Refilling of Oil in the A/C System 19...............
Performance Test 20............................
Refrigerant Leak Repair 21......................
Blower Relay Continuity Check 22................
A/C Compressor Relay Continuity Check 22........Condenser Fan Relay (LO) Check 23.............
Condenser Fan Relay (HI) Check 23..............
Idle-up Operation Check 24.....................
HEATER CONTROL ASSEMBLY (A/C-ECU)
AND A/C SWITCH 25........................
HEATER UNIT AND BLOWER ASSEMBLY 28.
REGISTOR, BLOWER MOTOR AND
INSIDE/OUTSIDE AIR CHANGE OVER
DAMPER MOTOR 32.........................
EVAPORATOR AND AIR THERMO SENSOR
34 ...........................................
COMPRESSOR 36............................
CONDENSER ASSEMBLY AND CONDENSER
FAN ASSEMBLY 40...........................
REFRIGERANT LINES 42.....................
DUCTS 44...................................
VENTILATION 45.............................

HEATER, AIR CONDITIONER AND VENTILATION-Troubleshooting55-3
TROUBLESHOOTING
BASIC FLOW OF TROUBLESHOOTING
Refer to Group 00 – How to Use Troubleshooting/Inspection Service Points.
INSPECTION CHART FOR TROUBLE SYMPTOMS
Trouble symptomInspection procedureReference page
Air conditioner not working at all155 - 3
Blower motor not working255 - 4
Air cannot be switched between inside and outside355 - 5
Rear defogger not working455-6
Cold air not coming out from the air outlet555 - 7
Magnet clutch not working normally655 - 8
Condenser fan not working at all755-9
Condenser fan not working only for LO855-10
Condenser fan not working only for HI955-11
INSPECTION PROCEDURE FOR TROUBLE SYMPTOM
Inspection procedure 1
Air conditioner not working at all
Probable cause
The A/C-ECU power supply system (including earth) may be defective.DHarness or connector fault
DA/C-ECU fault
NG
Repair
NG
Check the harness between the Ignition switch (IG2) and the
A/C-ECU, and repair if necessary.
NG
Repair
NG
Check the harness between the A/C-ECU and body earth, and
repair if necessary.
NG
Replace manual air conditioner control panel (A/C-ECU).
OK
Check the trouble
symptoms.
Check the following connectors:
C-32, C-08.
C-32
(2) NG
OK
Check the trouble
symptoms.
Measure at the A/C-ECU connector C-32.
DDisconnect the connector and measure at the harness
side.
DIgnition switch: ON
(1) Voltage between terminal 10 and body earth.
Voltage between terminal 7 and body earth.
OK :Battery voltage
(2) Continuity between terminals 12 and body earth.
Continuity between terminals 3 and body earth.
OK :Continuity(1) NGCheck the following connectors:C-32, C-209, C-210
OK
Check the trouble
symptoms.

HEATER, AIR CONDITIONER AND VENTILATION-Troubleshooting55-4
Inspection procedure 2
Blower motor not working
Probable cause
If the blower motor does not work, the blower motor circuit system may be
defective.DBlower motor fault
DHarness or connector fault
DA/C-ECU fault
NG
Replace
NG
Check the harness between the Ignition switch (IG2) and the
blower relay, and between fusible link No. 1 and the blower
relay, and repair if necessary.
OK
Check the trouble
symptoms.
NG
Repair
NG
Replace
OK
Check the resister. (Refer to P.55-32.)
NG
Replace
OK
Check the blower switch. (Refer to P.55-25.)
NG
Replace
OK
Check the blower relay. (Refer to P.55-22.)
NG
Repair
NG
Check the harness between the blower relay and body earth,
and repair if necessary.
OK
Check the trouble
symptoms.
Check the following connectors:
C-215, C-213.
C-215, C-213, C-08
(3) NG
OK
OK
(1) NG
Check the following connectors:C-215, C-210.
NG
Check the harness between the Ignition switch (IG2) and the
blower relay, and between fusible link No. 1 and the blower
relay, and repair if necessary.
OK
Check the trouble
symptoms.Repair
Check the following connectors:
C-215, C-211, C-132
C-215, C-11, C-35, C-132
(2) NG
Measure at the blower relay connector C-215.
DDisconnect the connector and measure at the harness
side.
DIgnition switch: ON
(1) Voltage between terminals 1 and body earth
OK :Battery voltage
(2) Voltage between terminals 5 and body earth
OK :Battery voltage
(3) Continuity between terminal 3 and body earth
OK :Continuity
To the next page
Check the blower motor. (Refer to P.55-32.)

HEATER, AIR CONDITIONER AND VENTILATION-Troubleshooting55-5
NG
Repair
NG
Repair
NG
Check the harness between the blower motor and the body
harness, and repair if necessary.
OK
Check the trouble
symptoms.
NG
Check the harness between the blower motor and the blower
relay, and repair if necessary.
OK
Check the trouble
symptoms.
Check the following connector:C-14.
(2) NG
OK
Check the trouble
symptoms.
NG
Check the harness between the blower switch and the
register, and between the register and blower motor, and
repair if necessary.
NG
Repair
OK
Measure at the blower motor connector C-14.
DDisconnect the connector and measure at the harness
side.
DIgnition switch: ON
DBlower switch position:4
(1) Voltage between terminal 1 and body earth
OK :Battery voltage
(2) Continuity between terminal 2 and body earth
OK :Continuity(1) NG
From the previous page
Check the following connectors:C-131, C-16, C-14.
Check the following connectors:C-215, C-210, C-131, C-14.
Inspection procedure 3
Air cannot be switched between inside and outside.
Probable cause
If the air cannot be switched between the inside and outside even though the
inside/outside switch is ON, the inside/outside changeover damper motor system
may be defective.DInside/outside air changeover damper motor fault
DHarness or connector fault
DA/C-ECU fault
NG
Replace
NG
Repair
OK
OK
Check the following connectors:C-10, C-107, C-32.
NG
Check the harness between the Ignition switch (IG2) and the
inside/outside air changeover damper motor, and repair if
necessary.
OK
Check the trouble
symptoms.
NG
Repair
OK
Measure at the inside/outside air changeover damper motor
connector C-10.
DDisconnect the connector and measure at the harness
side.
DIgnition switch: ON
DVoltage between terminal 7 and body earth.
OK :Battery voltageNGCheck the following connectors:C-10, C-107, C-102, C-209,
C-210.
Check the inside/outside air changeover damper motor (Refer
to P.55-32.).
NG
Repair
OK
Replace manual air conditioner control panel (A/C-ECU).
NG
Check the trouble
symptoms.
Check the harness between the inside/outside air changeover
damper motor and the A/C-ECU.

HEATER, AIR CONDITIONER AND VENTILATION-Troubleshooting55-6
Inspection procedure 4
Rear defogger not working
Probable cause
If the rear window defogger does not work even though the rear defogger switch
is ON (a 20-minute timer operates), the defogger relay system may be defective.DDefogger relay fault
DHarness or connector fault
DA/C-ECU fault
NG
Check the harness between the ignition switch (IG2) and the
defogger relay, and repair if necessary.
NG
Repair
Replace manual air conditioner control panel (A/C-ECU).
OK
OK
Check the trouble
symptoms.
NG
Check the following connectors:C-214, C-213, C-32.
OK
Check the trouble
symptoms.
NG
Replace
NG
Repair
NG
Check the harness between fusible link No. 1 and defogger
relay, and repair if necessary.
OK
Check the trouble
symptoms.
Check the following connectors:
C-214, C-211, C-132.
C-214, C-211, C-35, C-132
(2) NG
NG
Repair
NG
Check the harness between the defogger relay and the choke
coil, and repair if necessary.
OK
Check the trouble
symptoms.
Check the following connectors:
C-214, C-216, F-19.
C-214, C-217, F-19
NG
Repair
Check the following connectors:F-06.
OK
OK
Measure at the choke coil connector F-19.
DDisconnect the connector and measure at the harness
side.
DIgnition switch: ON
DVoltage between terminal 1 and body earth.
OK :Battery voltageNG
OK
Measure at the defogger relay connector C-214.
DDisconnect the connector and measure at the junction box
side.
DIgnition switch: ON
(1) Voltage between terminal 1 and body earth.
OK :Battery voltage
(2) Continuity between terminal 5 and body earth.
OK :Battery voltage(1) NGCheck the following connectors:C-214, C-210.
OK
Check the trouble
symptoms.
NG
RepairNG
Check the harness between body earth and defogger.
NG
RepairNG
Check harness between the defogger relay and A/C-ECU.
OK
Replace choke coil.
Check the defogger (Refer to Group 54A – Defogger.).