Mitsubishi Lancer Evolution 8. Manual — part 126
![](/vehicles/winoney/ugutr/ullalent/lllo.png)
SWS – TROUBLESHOOTING
54B-27
SWS monitor ECU check
• Ignition switch : OFF
ETACS-ECU
OK: “OK” is displayed
Check connectors C-203
Measure at the Column switch connector C-203
• Detach the connector and measure at the harness side
• Voltage between 1 and body earth
OK: Battery voltage
Measure at the Column switch connector C-203
• Detach the connector and measure at the harness side
• Connectivity between 4 and body earth
OK: Connectivity
Check connector C-225
Check the harness between the ETACS-ECU and the
column switch (request line)
SWS monitor ECU check
• Ignition switch : OFF
Column ECU (column switch)
OK: “OK” is displayed
Transient problem
To Inspection procedure A-3 No communication with
ETACS-ECU (see p.54B-28)
Check connectors C-07, C-209
Check the harness between the column switch and the
junction box, and repair
Check connector C-107
Check the harness between the column switch and the
body earth, and repair
Replace the column switch
Inspection Procedure A-2
No communication with column switch (column ECU)
Probable Cause
There may be a problem in the column switch (column ECU)
power supply circuit system.
If there is a problem in the harness of the ECU battery power
supply circuit (column switch terminal No.1), then the ignition
switch (IG1) power supply circuit (column switch terminal
No.9) should also be checked and repaired at the same time.
• Fault in column switch
• Fault in harness or connectors
OK
NG
NG
NG
NG
NG
NG
NG
OK
OK
OK
OK
OK
OK
OK
NG
OK
NG
Repair
Repair
Repair
Repair
Repair
![](/vehicles/winoney/ugutr/ullalent/zar.png)
SWS – TROUBLESHOOTING
54B-28
Inspection Procedure A-3
No communication with ETACS-ECU
Probable Cause
There may be an abnormality in the power supply circuit of the ETACS-
ECU or a problem in the harness or connectors between the SWS monitor
and the ETACS-ECU. In the event of an abnormality in the harness of the
ECU battery power supply (ETACS-ECU terminal No.20), the ignition
switch (IG1) power supply circuit (ETACS-ECU terminal No.8) should be
checked and repaired at the same time. Furthermore, in the event of an
abnormality in the harness of the ECU earth circuit (ETACS-ECU terminal
No.3), the centre earth circuit (ETACS-ECU terminal No.56) should be
checked and repaired at the same time.
• Fault in ETACS-ECU
• Fault in harness or connectors
Check connectors C-224
Measure at the ETACS-ECU connector C-224
• Detach the connector and measure at the junction box
side
• Voltage between 20 and body earth
OK: Battery voltage
Measure at the ETACS-ECU connector C-224
• Detach the connector and measure at the junction box side
• Connectivity between 3 and body earth
OK: Connectivity
Check connectors C-119, C-203, C-225
Check the harness between the ETACS-ECU and the
column switch (SWS)
SWS monitor ECU check
• Ignition switch : OFF
ETACS-ECU
OK: “OK” is displayed
Transient problem
Check connectors C-32, C-211
Check the harness between the ETACS-ECU and the
fusible link, and repair
Check connector C-212
Check the harness between the ETACS-ECU and the
body earth, and repair
Replace the ETACS-ECU
OK
OK
OK
OK
OK
OK
OK
OK
NG
NG
NG
NG
NG
NG
NG
NG
Repair
Repair
Repair
Repair
Repair
![](/vehicles/winoney/ugutr/ullalent/mandelatou.png)
SWS – TROUBLESHOOTING
54B-29
SWS monitor ECU check
• Ignition switch : OFF
ETACS-ECU
OK: “OK” is displayed
Measure at the Front ECU connector A-12X
• Detach the connector and measure at the relay box
side
• Voltage between 7 and body earth
OK: Battery voltage
Check connector A-13X
Measure at the Front ECU connector A-13X
• Detach the connector and measure at the relay box
side
• Connectivity between 31 and body earth
OK: Connectivity
Check connectors C-31, C-119, C-203
Check the harness between the front ECU and the
column switch (SWS)
SWS monitor ECU check
• Ignition switch : OFF
Front ECU
OK: “OK” is displayed
Transient problem
To Inspection procedure A-3 No communication with
ETACS-ECU (see p.54B-28)
Check connectors C-07, C-31, C-209
Check the harness between the front ECU and the
junction box, and repair
Check the harness between the front ECU and the body
earth, and repair
Replace the front ECU
Check connector A-12X
Inspection Procedure A-4
No communication with front ECU
Probable Cause
There may be an abnormality in the front ECU power supply circuit system, or a
problem the harness and connectors between the SWS monitor and the front
ECU. In the event of an abnormality in the harness of the ECU battery power
supply circuit (Front ECU terminal No.7), the ignition switch (IG2) power supply
circuit (front ECU terminal No.30) at the same time.
• Fault in front ECU
• Fault in harness or connectors
NG
NG
NG
NG
NG
NG
NG
NG
NG
OK
OK
Repair
Repair
Repair
Repair
Repair
OK
OK
OK
OK
OK
OK
OK
![](/vehicles/winoney/ugutr/ullalent/eriver.png)
SWS – TROUBLESHOOTING
54B-30
Inspection Procedure A-5
SWS monitor ECU check
• Ignition switch : OFF
ETACS-ECU
OK: “OK” is displayed
SWS monitor service data
(Communications data) ETACS-
ECU
• Ignition switch : ON
Item No. Item Name Normal state
30 Ignition SW IG1
ON
OK: Normal state is displayed
Check connector E-02
Measure at the Electric window
main switch connector E-02
• Detach the connector and
measure at the harness side
• Ignition switch : ON
• Voltage between 6 and body
earth
OK: Battery voltage
Measure at the Electric window
main switch connector E-02
• Detach the connector and
measure at the harness side
• Connectivity between 2 & body
earth
OK: Connectivity
Check connectors
C-114, C-119, C-203
Check the harness between the
electric window main switch and
the column switch (SWS)
SWS monitor ECU check
• Ignition switch : ON
Electric window main switch
OK: “OK” is displayed
Transient problem
To Inspection procedure A-3 No
communication with ETACS-ECU
(see p.54B-28)
To Inspection procedure R-2
“Ignition switch (IG1) signal not
input” (See p.54B-96)
Check connector C-222
Measure at the Electric window
relay connector C-222
• Detach the connector and
measure at the junction box side
• Voltage between 5 & body earth
OK: Battery voltage
Measure at the Electric window
relay connector C-222
• Detach the connector and
measure at the junction box side
• Connectivity between 3 & body
earth
OK: Connectivity
Check connector C-224
Check the harness between the
electric window relay and the
ETACS-ECU
Check connector C-114
Replace the electric window main
switch
Check connectors C- 32, C-210
Check the harness between the
electric window relay and the
battery, and repair
Check connector C-212
Check the harness between the
electric window relay and the
body earth, and repair
Check the harness between the
electric window main switch and
the body earth, and repair
Replace the
ETACS-ECU
Check the electric window relay (see Chap. 42 Doors *)
Note * : See ’00-5 ’00-5 Lancer Cedia Servicing Manual (No. 1036K00)
No communication with electric window main switch (electric window
module)
Probable Cause
There may be an abnormality in the power supply circuit system of the
electric window main switch (electric window relay drive circuit system), or
in the communications circuit system.
• Fault in electric window main switch
• Fault in electric window relay
• Fault in ETACS-ECU
• Fault in harness or connectors
NG
NG
NG
NG
NG
NG
NG
NG
NG
NG
NG
NG
NG
NG
OK
NG
NG
Repair
Repair
Replace
Repair
Repair
Repair
Repair
Repair
Repair
Repair
NG
OK
OK
OK
OK
OK
OK
OK
OK
OK
OK
OK
OK
OK
OK
OK
OK
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