Mitsubishi Lancer Evolution 7. Manual — part 390
SWS -
Troubleshooting
54B-5
Code No. 13 Front-ECU-related fault or fault in
connecting to ETACS-ECU
Probable cause
This diagnosis code is output when the signal output from the front-ECU to
ETACS-ECU contains an error for 15 consecutive communication cycles (0.6
seconds). The diagnosis code output stops when the signal output from the
front-ECU to ETACS-ECU is normal for 15 consecutive communication cycles
(0.6 seconds).
D
front-ECU fault
D
ETACS-ECU fault
D
Harness or connector fault
NG
Repair
NG
Replace ETACS-ECU.
OK
Check the trouble
symptoms.
NG
Repair
NG
Check the harness between the
front-ECU and the battery.
OK
Check the trouble
symptoms.
NG
Replace ETACS-ECU.
OK
Replace front-ECU.
Check the trouble symptoms.
NG
Check the harness between the
front-ECU and ETACS-ECU.
NG
Repair
OK
Check the trouble symptoms.
OK
Replace front-ECU.
OK
Check the trouble symptoms.
NG
Check the harness between the
front-ECU and the body earth, and
repair if necessary.
NG
Check the following connector:
A-11X
NG
Repair
YES
Measure at the front-ECU connector
A-11X.
D
Disconnect the connector and
test on the relay box side.
D
Continuity between terminal 31
and body earth
OK : Continuity confirmed.
OK
Check the following connectors:
A-11X, C-135, C-102, C-228
NG
Repair
Is code 13 output when the ignition
switch is in the ON position?
NO
Measure at the front-ECU connector
A-10X.
D
Disconnect the connector and
test on the relay box side.
D
Voltage between terminal 7 and
body earth
OK : System voltage
NG
Check the following connector:
A-10X
SWS -
Troubleshooting
54B-6
Code No. 21 Short circuit in communication lines.
Probable cause
This diagnostic code is output when the voltage on an SWS communication line
goes LOW for 0.3 seconds. The diagnosis code output stops when the
ETACS-ECU data line voltage goes HIGH for 0.3 seconds, or when the
ETACS-ECU receives a normal signal from another ECU or switch. During the
output of this code, other codes are suppressed.
D
Column switch fault
D
front-ECU fault
D
Power window main switch fault
D
ETACS-ECU fault
D
Harness or connector fault
Replace ETACS-ECU.
YES
YES
When the power window main switch connector E-07 is
disconnected, is Code No. 21 output?
NO
Replace power window main switch.
YES
When the front-ECU connector A-11X disconnected, is Code
NO. 21 output? (However, Code No. 13 is output)
NO
Replace front-ECU.
OK
Is code 21 no longer output when column switch connector
C-203 is disconnected? (Note that code 12 is still output with
C-203 disconnected.)
NO
Replace column switch.
NG
Check the harnesses of the column switch ETACS-ECU,
front-ECU, power window main switch.
NG
Repair
OK
Check the trouble symptoms.
Check the following connectors: C-228, C-203, C-135,
A-11X, C-102, C-24, E-07, C-110, D-25, C-25
NG
Repair
SWS -
Troubleshooting
54B-7
TROUBLE SYMPTOM CHART
Trouble symptom
Inspection
procedure
Reference
page
No communication with MUT-II
A-1
54B-10
Buzzers
Lights left ON reminder warning function not working normally.
B-1
54B-10
Central locking
Central door locking system not working at all.
C-1
54B-11
g
Some doors not locking or unlocking.
C-2
54B-11
Power window
Power windows not working at all.
D-1
54B-12
Power windows are not operated with the power window main
switch.
Driver’s power window not responding to power window main
switch.
D-2
54B-13
Windows not responding to passenger or rear power window
switches.
D-3
54B-14
Passenger or rear power windows not responding to power window
main switch.
D-4
54B-15
Power window timer function not working normally.
D-5
54B-15
While the window is winding up, it suddenly starts coming down
again.
D-6
54B-16
Safety mechanism (to prevent jamming of fingers, etc.) not
working.
D-7
54B-16
Windshield
wipers
d
h
The windshield wipers do not work at all.
E-1
54B-17
p
and washer
The windshield wipers only operate at LO speed (though the wipers
and washer can be switched OFF).
E-2
54B-17
The windshield wipers do not respond to any switch position.
E-3
54B-18
The windshield wipers do not stop in the normal predetermined
position.
E-4
54B-18
The windshield washer does not work at all.
E-5
54B-19
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.
E-6
54B-19
Headlamps, tail lamps
Except for lighting switch
“
OFF,” the headlamps only respond to the
“
low-beam” position.
F-1
54B-20
The tail lamps do not work.
F-2
54B-20
The headlamps (low-beam) do not light.
F-3
54B-21
The headlamps (high-beam) do not light.
F-4
54B-21
The headlamps (low or high-beam) do not work when the passing
switch is ON.
F-5
54B-22
The headlamp automatic cut-off function is not working normally.
F-6
54B-22
Rear fog lamp
Rear fog lamp is not properly illuminated.
G-1
54B-23
Flasher timer
The turn signal lamps do not light.
H-1
54B-24
The hazard warning lamps do not light up.
H-2
54B-24
Room lamps
The room lamps do not come ON or OFF normally.
I-1
54B-25
SWS -
Troubleshooting
SWS -
Troubleshooting
54B-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 symptom
Inspection
procedure
Reference
page
No ignition switch (ACC) signal input to ETACS-ECU.
J-1
54B-26
No ignition switch (IG1) signal input to ETACS-ECU.
J-2
54B-26
No hazard warning lamp switch signal input to ETACS-ECU.
J-3
54B-27
No rear fog lamp switch signal input to ETACS-ECU.
J-4
54B-28
No driver’s door switch signal input to ETACS-ECU.
J-5
54B-29
No door switch signals input to ETACS-ECU.
No driver’s door lock actuator signal input to ETACS-ECU.
J-6
54B-30
Column switches
No tail lamp switch signal input to ETACS-ECU.
J-7
54B-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 switches
No windshield mist wiper switch signal input to ETACS-ECU.
J-8
54B-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 switch
No power window main switch signal input to ETACS-ECU.
J-9
54B-32
When the ignition switch is in the LOCK (OFF) position, no functions work normally.
K-1
54B-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.
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