Mitsubishi Lancer Evolution 8. Manual — part 142
SWS – TROUBLESHOOTING
54B-91
Is the interior light automatic cut-off function set to
“Function ON”?
SWS monitor ECU check
• Ignition switch: OFF
ETACS-ECU
OK: “OK” is displayed
SWS monitor service data
(Communications data) ETACS-ECU
• Ignition switch: OFF
• Driver’s door: Open (but closed when checking Item
No.38)
• All doors: Open (but closed when checking Item No.32)
Item No.
Item Name
Normal state
(a) 31
Ignition switch (ACC)
OFF
(a) 30
Ignition switch (IG1)
OFF
(b) 32
Driver’s door SW
ON
(c) 38
Security alarm
ON
OK: Normal state displayed for all
MUT-II/III pulse check
Generic fuse No.17
OK MUT-II/III buzzer sounds once
Confirm the trouble symptoms
Replace the ETACS-ECU
Use the adjustment function to set the interior light
automatic cut-off function to “Function ON” (p.54B-118)
To Inspection procedure A-3 No communication with
ETACS-ECU (p.54B-28)
To Inspection procedure R-1 Ignition switch (ACC) signal
not input (p.54B-96)
To Inspection procedure R-2 Ignition switch (IG1) signal not
input (p.54B-96)
To Inspection procedure R-4 Driver’s door switch signal
not input (p.54B-98)
To Inspection procedure R-14 All door switch signals not
input (except driver’s door) (p.54B-106)
To Inspection procedure R-19 Generic fuse No.17 load
use signal not detected (p.54B-111)
Inspection procedure N-2
Note:
If only one of the interior lights will not switch off (front interior light, rear interior light (vehicle not fitted with sunroof), boot
interior light, door ajar indicator light, ignition key cylinder illumination light), then check the bulb, and the harnesses between
the ETACS-ECU and the light, and the light and the body earth.
Interior light automatic cut-off function not working correctly (cars
fitted with keyless entry system)
Probable Cause
The interior light automatic cut-off function is operated by determining
the following input signals in the ETACS-ECU.
• Ignition switch (IG1)
• Ignition switch (ACC)
• Driver’s door switch
• All door switch
• Generic fuse No. 17
If the lights do not work correctly, then there is probably a problem in the
input circuit system for these signals, or a fault in the ETACS-ECU.
There is also a possibility that the interior light automatic cut-off function
has been switched off by the adjustment function.
• Fault in all door switch
• Fault in interior light switch
• Fault in ETACS-ECU
• Fault in harness or connectors
YES
OK
OK
OK
OK
NO
NG
NG (a)
NG (b)
NG (c)
NG (d)
NG
SWS – TROUBLESHOOTING
54B-92
Inspection procedure O-1
Do the interior lights switch on normally?
SWS monitor ECU check
• Ignition switch: OFF
ETACS-ECU
OK: “OK” is displayed
Check connectors C-108, C-106, C-225, C-110
Check the harness between the combination meter and
the ETACS-ECU
Confirm the trouble symptoms
Transient problem
To Inspection procedure N-1 Interior lights do not light up
or switch off correctly (p.54B-88)
To Inspection procedure A-3 No communication with
ETACS-ECU (p.54B-28)
Replace the ETACS-ECU
Door ajar indicator light does not light up or switch off correctly
Probable Cause
The door ajar indicator light is lit up by determining the following input
signals in the ETACS-ECU.
• Driver’s door switch
• All door switch
If the light does not work correctly, then there is probably a problem in the
input circuit system for these signals, or a fault in the ETACS-ECU.
• Fault in all door switch
• Fault in combination meter
• Fault in ETACS-ECU
• Fault in harness or connectors
OK
OK
OK
OK
OK
NO
NO
NG
NG
Repair
SWS – TROUBLESHOOTING
54B-93
Is the security alarm set to “Hazards only” or “Horn and
Hazards”?
Is the keyless entry system working properly?
SWS monitor service data
(Communications data) ETACS-ECU
• Ignition switch: ACC
Item No.
Item Name
Normal state
31
Ignition switch (ACC)
OFF
OK: Normal state displayed
SWS monitor service data
ETACS switch data
• Ignition switch: OFF (key inserted)
Item No.
Item Name
Normal state
30
Key reminder SW
ON
OK: Normal state displayed
Confirm the trouble symptoms
Transient problem
Use the adjustment function to set the security alarm to
“Hazards only” or “Horn and Hazards” (p.54B-118)
Check the keyless entry system (See Chart of Trouble
Symptoms)
To Inspection procedure R-1 Ignition switch (ACC) signal
not input (p.54B-96)
To Inspection procedure R-11 Key reminder switch signal
not input (p.54B-103)
Replace the ETACS-ECU
Inspection procedure P-1
Security alarm does not enter warning state
Probable Cause
This function is operated by determining the following input
signals in the ETACS-ECU.
• Keyless entry transmitter switch
• Key reminder switch
• Ignition switch (ACC)
If the function does not work correctly, then there is probably a
problem in the input circuit system for these signals, or a fault
in the ETACS-ECU.
• Fault in keyless entry transmitter
• Fault in key reminder switch
• Fault in ETACS-ECU
• Fault in harness or connectors
YES
OK
OK
OK
OK
NO
NG
NG
NG
NG
SWS – TROUBLESHOOTING
54B-94
Inspection procedure P-2
Is the security alarm set to “Hazards only” or “Horn and
Hazards”?
SWS monitor ECU check
• Ignition switch: OFF
ETACS-ECU
OK: “OK” is displayed
SWS monitor service data
(Communications data) ETACS-ECU
• All doors: respectively opened and closed
Item No.
Item Name
Normal state
38
Security alarm
ON
OK: Normal state displayed
Confirm the trouble symptoms
Transient problem
Is the security alarm set to “Hazards only” or “Horn and
Hazards”?
Are the hazard lights working normally?
SWS monitor ECU check
• Ignition switch: OFF
ETACS-ECU
OK: “OK” is displayed
Confirm the trouble symptoms
Transient problem
Use the adjustment function to set the security alarm to
“Hazards only” or “Horn and Hazards” (p.54B-118)
To Inspection procedure M-2 Hazard lights do not light
up (p.54B-86)
To Inspection procedure A-3 No communication with
ETACS-ECU (p.54B-28)
Replace the ETACS-ECU
Use the adjustment function to set the security alarm to
“Hazards only” or “Horn and Hazards” (p.54B-118)
To Inspection procedure A-3 No communication with
ETACS-ECU (p.54B-28)
To Inspection procedure R-14 All door switch signals not
input (except driver’s door) (p.54B-106)
Replace the ETACS-ECU
Inspection procedure P-3
Interior warning does not operate correctly when security alarm operates
Probable Cause
This function is operated by determining the all door switch input signal in the
ETACS-ECU.
If the function does not work correctly, then there is probably a problem in the
input circuit system for this signal, or a fault in the ETACS-ECU.
• Fault in all door switch
• Fault in ETACS-ECU
• Fault in harness or connectors
Hazard lights do not flash when security alarm operates
Probable Cause
This function is operated by the ETACS-ECU.
If the hazard lights do not flash properly, then there is
probably a fault in the ETACS-ECU.
• Fault in ETACS-ECU
• Fault in harness or connectors
YES
OK
OK
OK
YES
YES
OK
OK
NO
NG
NG
NG
NO
NO
NG
NG
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