2007 MITSUBISHI LANCER EVOLUTION ECU

SWS -TroubleshootingSWS -Troubleshooting54B-8
DEFECTS FOUND BY INPUT SIGNAL CHECK
When a fault is identified in an input signal check, use the following table to investigate the fault.
Trouble symptomInspection
procedureReference
page
No ignition switch (ACC) signal input to ETACS-ECU.J-154B-26
No ignition switch (IG1) signal input to ETACS-ECU.J-254B-26
No hazard warning lamp switch signal input to ETACS-ECU.J-354B-27
No rear fog lamp switch signal input to ETACS-ECU.J-454B-28
No driver’s door switch signal input to ETACS-ECU.J-554B-29
No door switch signals input to ETACS-ECU.
No driver’s door lock actuator signal input to ETACS-ECU.J-654B-30
Column switchesNo tail lamp switch signal input to ETACS-ECU.J-754B-31
No headlamp switch signal input to ETACS-ECU.
No dimmer switch signal input to ETACS-ECU.
No passing switch signal input to ETACS-ECU.
No turn signal lamp left-hand switch signal input to
ETACS-ECU.
No turn signal lamp right-hand switch signal input to
ETACS-ECU.
Column switchesNo windshield mist wiper switch signal input to ETACS-ECU.J-854B-31
No windshield wiper intermittent switch signal input to
ETACS-ECU.
No windshield low-speed wiper switch signal input to
ETACS-ECU.
No windshield high-speed wiper switch signal input to
ETACS-ECU.
No windshield washer switch signal input to ETACS-ECU.
Power window main switchNo power window main switch signal input to ETACS-ECU.J-954B-32
When the ignition switch is in the LOCK (OFF) position, no functions work normally.K-154B-33
ETACS-ECU battery power supply circuit control check.
NOTE
A diagnosis code is output for front-ECU and column switch battery power supply circuit control abnormalities.
Apply the diagnosis code inspection procedures to address these abnormalities.

SWS -Troubleshooting54B-10
INSPECTION PROCEDURE FOR TROUBLE SYMPTOMS
Inspection Procedure A-1
No communication with MUT-II
Probable cause
Either the ETACS-ECU power supply circuit system or the harness or connector
between the diagnosis connector and ETACS-ECU may be defective.DHarness or connector fault
DETACS-ECU fault
NG
Check the harness between ETACS-ECU and the body earth,
and repair if necessary.
NG
Repair
NG
Repair
OK
Replace ETACS-ECU.
NG
Check the harness between ETACS-ECU and diagnosis
connector.NG
Repair
OK
Check the trouble
symptoms.
OK
Check the following connectors:
C - 228, C - 26, C - 22
C-228, C-28, C-22
OK
Check the trouble
symptoms.
NO
Measure at the ETACS-ECU connector C-228.
DDisconnect the connector and test on the junction box
side.
DContinuity between terminal 56 and body earth.
OK :Continuity confirmed.NGCheck the following connectors:C-228, C-08
YES
Is communication, by MUT-II, possible with other systems?YESCheck ETACS-ECU battery power circuit system (Refer to
P.54B-33, Inspection Procedure K-1).
Is communication by MUT-II possible when the ignition switch
is ON?NOCheck the MUT-II diagnosis circuit, and repair if necessary.
NOTE:
When failure is detected on the harness between ETACS-ECU and the body earth, check No. 3 terminal
(C-226) of ETACS-ECU as well. Repair, if required.
Inspection Procedure B-1
Lights left ON reminder warning function not working
normally.
Probable cause
The ETACS-ECU controls the headlamp automatic cut-off function based on input
signals from the following switches.
DIgnition switch (IG1)
DDriver’s door switch
DTail lamp switch
DHeadlamp switchDDriver’s door switch fault
DColumn switch fault
DETACS-ECU fault
DHarness or connector fault
OK
Replace ETACS-ECU.
YES
Check the MUT-II input signals.
DIgnition switch (IG1)
DDriver’s door switch
DTail lamp switch
DHeadlamp switchNGCheck the defective input circuit. (Refer to P.54B-7, Defects
Found by Input Signal Check).
Do all of the following functions operate when the ignition
switch is in the LOCK (OFF) position?
DCentral locking
DHazard lampsNOCheck ETACS-ECU battery power circuit system (Refer to
P.54B-33, Inspection Procedure K-1).

SWS -Troubleshooting54B-11
Inspection Procedure C-1
Central door locking system not working at all.
Probable cause
A change in the input signal from the driver’s door lock actuator activates all the
door lock actuators, causing the ETACS-ECU to lock or unlock all the doors.
If the central locking is not working normally, the driver’s door lock actuator or
the ETACS-ECU may be defective.DDriver’s door lock actuator fault
DETACS-ECU fault
DHarness or connector fault
NG
Repair
OK
Replace ETACS-ECU.
NG
Check the harness between ETACS-ECU and battery.NG
Repair
OK
Check the trouble
symptoms.
OK
Check the following connectors:C-226, C-211, C-35, C-132
YES
Check the driver’s door lock actuator (Refer to GROUP 42 -
Doors).NG
Repair
Do all of the following functions operate when the ignition
switch is in the LOCK (OFF) position?
DLights left ON reminder warning function
DHazard warning lamps
DRoom lampsNOCheck ETACS-ECU battery power circuit system (Refer to
P.54B-33, Inspection Procedure K-1). OK
Check the MUT-II input signals.
DDriver’s door lock actuatorNGCheck the driver’s door lock actuator input circuit system
(Refer to P.54B-30, Inspection Procedure J-6).
Inspection Procedure C-2
Some doors not locking or unlocking.
Probable cause
The door lock actuator of the door(s) that are not responding may be defective.DDoor lock actuator fault
DHarness or connector fault
NG
Check the harness between ETACS-ECU and the door lock
actuator of the door(s) not responding, and repair if necessary.
OK
Check the trouble symptoms.
OK
Check the following connectors:

C-227, C-110, C-213, C-226, E-08
C-226, C-213, C-24, E-18
C-226, C-216, D-12, E-12
C-226, C-213, C-112, D-02, E-23

C-227, C-24, C-28, C-213, C-226, E-08
C-226, C-213, C-110, C-28, E-18
C-226, C-213, C-28, C-133, D-12, E-12
C-226, C-216, D-02, E-23NG
Repair
Check the driver’s door lock actuator that are not responding
(Refer to GROUP 42 - Doors).NG
Replace

SWS -Troubleshooting54B-12
Inspection Procedure D-1
Power windows not working at all.
Probable cause
Power windows are not operated with the power window
main switch.
The power window relay or the ETACS-ECU may be defective.DPower window relay fault
DETACS-ECU fault
DHarness or connector fault
NG
Check the harness between the power window relay and the
fusible link (5), and repair if necessary.
NG
Repair
OK
Check the trouble
symptoms.
OK
NG
Check the following connectors:
C-224, C-210, C-35 (R.H.drive vehicles only), C-132
OK
Check power window relay (Refer to GROUP 42 - Door.)NG
Replace
Check the MUT-II input signals.
DIgnition switch (IG1)NGCheck the ignition switch (IG1) input circuit system (Refer to
P.54B-26, Inspection Procedure J-2).
NG
Check and repair the harness between the power window
relay and the body earth.
NG
RepairOK
Replace ETACS-ECU.
OK
Check the trouble
symptoms.
OK
Measure at the power window relay connector C-224.
DDisconnect the connector and test on the junction box
side.
DContinuity between terminal 3 and body earth.
OK :Continuity confirmed.NGCheck the following connectors:
C-224, C-213, C-08
C-224, C-213, C-102
Measure at the power window relay connector C-224.
DDisconnect the connector and test on the junction box
side.
DVoltage between terminal 5 and the body earth.
OK :System voltage

SWS -Troubleshooting54B-15
Inspection Procedure D-4
Passenger or rear power windows not responding to
power window main switch.
Probable cause
Either the power window main switch or the passenger’s or rear power window
motor assembly may be defective.DPower window main switch fault
DPassenger’s or rear power window motor assembly
fault
DHarness or connector fault
NG
Replace power window main switch.
OK
Replace power window motor assembly.Check the trouble symptoms.
NGCheck the harness between the power window motor
assembly and the power window main switch.NG
Repair
OK
Check the trouble symptoms.
YES
Check the following connectors:

E-20, C-24, C-110, E-07 (L.H. drive vehicles)
E-05, C-24, C-110, E-07 (R.H. drive vehicles)

E-10, D-12, C-133, C-24, E-07 (L.H. drive vehicles)
E-10, D-12, C-133, C-110, E-07 (R.H. drive vehicles)

E-25, D-02, C-112, C-24, E-07 (L.H. drive vehicles)
E-25, D-02, C-112, C-110, E-07 (R.H. drive vehicles)NG
Repair
OK
Do the power windows respond to the sub-switches?NORefer to P.54B-14, Inspection Procedure D-3.
Check the MUT-II input signals.
DPower window main switchNGCheck the power window main switch input circuit system
(Refer to P.54B-32, Inspection Procedure J-9).
Inspection Procedure D-5
Power window timer function not working normally.
Probable cause
The ETACS-ECU controls the headlamp automatic cut-off function based on input
signals from the following switches.
DIgnition switch (IG1)
DDriver’s door switch
If the power window timer function does not operate normally, one of the above
input circuit systems, the power window main switch, or the ETACS-ECU may
be defective.DDriver’s door switch fault
DPower window main switch fault
DETACS-ECU fault
DHarness or connector fault
NG
Replace power window main switch.
OK
Replace ETACS-ECU.Check the trouble symptoms.
Check the MUT-II input signals.
DIgnition switch (IG1)
DDriver’s door switch
DPower window main switchNGCheck the defective input circuit. (Refer to P.54B-8, Defects
Found by Input Signal Check).
Do all of the following functions operate when the ignition
switch is in the LOCK (OFF) position?
DCentral locking
DHazard lampsNOCheck ETACS-ECU battery power circuit system (Refer to
P.54B-33, Inspection Procedure K-1).
YES

SWS -Troubleshooting54B-17
Inspection Procedure E-1
The windshield wipers do not work at all.
Probable cause
Either the windshield wiper motor, the column switch, or the front-ECU may be
defective.DWindshield wiper motor fault
DColumn switch fault
Dfront-ECU fault
DHarness or connector fault
OK
Replace front-ECU.
NO
NG
Replace
MUT-II diagnosis code
Is an ETACS-ECU diagnosis code output?YESPerform the inspection procedure for the diagnosis code
(Refer to P.54B-3).
NG
Repair
NG
Check the harness between the windshield wiper motor and
the body earth, and repair if necessary.
OK
Check the trouble
symptoms.
NG
Repair
NG
Check the harness between the front-ECU and the ignition
switch (IG2), and repair if necessary.
OK
Check the trouble
symptoms.
OK
Measure at the front-ECU connector A-11X
DDisconnect the connector and test on the harness side.
DIgnition switch ON
DContinuity between terminal 30 and body earth.
OK :System voltageNGCheck the following connectors:A-11X, C-135, C-102,
C-209, C-210
OK
Measure at the windshield wiper motor connector B-01.
DDisconnect the connector and test on the harness side.
DContinuity between terminal 5 and body earth.
OK :Continuity confirmed.NGCheck the following connector:B-01
Check the windshield wiper motor (Refer to GROUP 51 -
Windshield Wipers and Washer).
Inspection Procedure E-2
The windshield wipers only operate at LO speed (though
the wipers and washer can be switched OFF).
Probable cause
If the windshield wipers only operate at LO speed regardless of the switch
position, the windshield wiper fail-safe function is probably activated. Or the
ETACS-ECU ignition switch (ACC) signal may be controlling the wiper operation.DColumn switch fault
Dfront-ECU fault
DHarness or connector fault
OK
Replace front-ECU.
MUT-II diagnosis code
Is an ETACS-ECU diagnosis code output?YESPerform the inspection procedure for the diagnosis code
(Refer to P.54B-3).
Check the MUT-II input signals.
DIgnition switch (ACC)NGCheck the ignition switch (ACC) input circuit system (Refer to
P.54B-26, Inspection Procedure J-1). NO

SWS -Troubleshooting54B-18
Inspection Procedure E-3
The windshield wipers do not respond to any switch
position.
Probable cause
Either the windshield wiper motor, the column switch, or the front-ECU may be
defective.DWindshield wiper motor fault
DColumn switch fault
Dfront-ECU fault
DHarness or connector fault
OK
Replace front-ECU.
NG
Check the harness between the front-ECU and the windshield
wiper motor. NG
Repair
OK
Check the trouble symptoms.
OK
Check the following connectors:
A-11X, A-13, B-01
A-11X, C-136, B-01NG
Repair
OK
Check the windshield wiper motor (Refer to GROUP 51 -
Windshield Wipers and Washer).NG
Replace
Check the MUT-II input signals.
DWindshield mist wiper switch
DWindshield wiper intermittent switch
DWindshield wiper LO speed switch
DWindshield wiper HI speed switch
DWindshield washer switchNGCheck the defective input circuit. (Refer to P.54B-8, Defects
Found by Input Signal Check).
Inspection Procedure E-4
The windshield wipers do not stop in the normal
predetermined position.
Probable cause
Either the windshield wiper motor or the front-ECU may be defective.DWindshield wiper motor fault
Dfront-ECU fault
DHarness or connector fault
NG
Repair
NG
Check the harness between the windshield wiper motor and
ignition switch (ACC), and repair if necessary.
NG
Repair
OK
Replace front-ECU.
NG
Check the harness between the front-ECU and the windshield
wiper motor.NG
Repair
OK
Check the trouble
symptoms.
OK
OK
Check the trouble
symptoms.
OK
Measure at the windshield wiper motor connector B-01.
DDisconnect the connector and test on the harness side.
DIgnition switch ACC
DContinuity between terminal 4 and body earth.
OK :System voltageNGCheck the following connectors:B-01, C-129, C-209, C-210
Check the windshield wiper motor (Refer to GROUP 51 -
Windshield Wipers and Washer).NG
Replace
Check the following connectors:
A-11X, C-34, B-01
A-11X, C-136, B-01

SWS -Troubleshooting54B-19
Inspection Procedure E-5
The windshield washer does not work at all.
Probable cause
Either the windshield washer switch input circuit system, the windshield washer
motor, or the front-ECU may be defective.DWindshield washer motor fault
DColumn switch fault
Dfront-ECU fault
DHarness or connector fault
NG
Repair
NG
Check the harness between the windshield washer motor and
body earth, and repair if necessary.NG
Repair
OK
Replace front-ECU.
NG
Check the harness between the windshield washer motor and
the front-ECU.NG
Repair
OK
Check the trouble
symptoms.
OK
Check the following connectors:F-21, C-112, C-125, A-11X
OK
Check the trouble
symptoms.
OK
Measure at the windshield washer motor connector F-21.
DDisconnect the connector and test on the harness side.
DContinuity between terminal 1 and body earth
OK :Continuity confirmed.NGCheck the following connector:F-21
OK
Check the windshield washer motor (Refer to GROUP 51 -
Windshield Wipers and Washer).NG
Replace
YES
Check the MUT-II input signals.
DWindshield washer switchNGCheck the windshield washer switch input circuit system
(Refer to P.54B-31, Inspection Procedure J-8).
Is the windshield wiper operating normally?NOCheck windshield wipers (Refer to P.54B-7, Trouble Symptom
Chart).
Inspection Procedure E-6
Windshield wipers are not operated with the switch in INT,
WASHER and MIST positions, and operated in a low mode
with the switch in Lo and Hi positions.
Probable cause
Fail-safe function may be operated due to the fault on SWS communication line.
Fail-safe function is activated with the ignition switch in ACC position when the
ignition switch ACC signal is not input due to the open circuit, etc.DColumn switch fault
Dfront-ECU fault
DETACS-ECU fault
DHarness or connector fault
NG
Replace front-ECU.
Check the trouble symptoms.
Check the ignition switch (ACC) input circuit system (Refer to
P.54B-26, Inspection Procedure J-1)NOCheck the MUT-II input signals.
DIgnition switch (ACC)
YES
NG
Replace column switch.
Check the trouble symptoms.
NG
Replace ETACS-ECU.Check the trouble symptoms.