Mitsubishi Lancer Evolution IX. Manual — part 228
SYMPTOM PROCEDURES
SMART WIRING SYSTEM (SWS) USING SWS MONITOR
54C-171
Step 5. Connector check: C-228 ETACS-ECU
connector
Q: Is the check result normal?
YES :
Go to Step 6.
NO :
Repair the defective connector.
Step 6. Check the wiring harness from C-228
ETACS-ECU connector terminal Nos.69 and 71 to
C-207 ignition key cylinder illumination lamp
connector terminal Nos.1 and 2.
AC310450
Connector: C-228 <LHD>
AC
Junction block (rear view)
C-228 (GR)
Harness side
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
AC310461
Junction block (rear view)
Connector: C-228 <RHD>
AC
Harness side
C-228 (GR)
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
AC310479
2
7 6
1
3
5 4
Connector: C-207 <LHD>
AE
Harness side
AC310481
2
7 6
1
3
5 4
Connector: C-207 <RHD>
AE
Harness side
AC310450
Connector: C-228 <LHD>
AC
Junction block (rear view)
C-228 (GR)
Harness side
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
AC310461
Junction block (rear view)
Connector: C-228 <RHD>
AC
Harness side
C-228 (GR)
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
SYMPTOM PROCEDURES
SMART WIRING SYSTEM (SWS) USING SWS MONITOR
54C-172
NOTE:
Prior to the wiring harness inspection, check joint
connector C-23, and repair if necessary.
• Check the input and output lines for open circuit.
Q: Is the check result normal?
YES :
Go to Step 7.
NO :
Repair the wiring harness.
Step 7. Retest the system.
Check that the ignition key cylinder illumination lamp
illuminates/extinguishes normally.
Q: Is the check result normal?
YES :
The trouble can be an intermittent
malfunction (Refer to GROUP 00
− How to
Cope with Intermittent Malfunction
NO :
Replace the ETACS-ECU.
AC310446
Connector: C-23
BB
<LHD>
C-23 (B)
Harness side
AC310456
Connector: C-23
AJ
<RHD>
C-23 (B)
Harness side
SYMPTOM PROCEDURES
SMART WIRING SYSTEM (SWS) USING SWS MONITOR
54C-173
HEADLAMP AND TAIL LAMP
INSPECTION PROCEDURE H-1: The headlamps do not illuminate when the lighting switch is at "TAIL"
or "PASSING" position, but illuminate only at low beam when the switch is at "HEAD" position.
However, the headlamps do not illuminate at high beam.
CAUTION
Whenever the ECU is replaced, ensure that the
input and output signal circuits are normal.
COMMENTS ON TROUBLE SYMPTOM
If the headlamps illuminate only at low beam regard-
less of the lighting switch position, the headlamp
fail-safe function may be activated.
POSSIBLE CAUSES
• Malfunction of the column switch
• Malfunction of the front-ECU
• Damaged harness wires and connectors
DIAGNOSIS PROCEDURE
Step 1. ECU check by using the SWS monitor.
Check that the power supply and earth lines to the
column switch (column-ECU) and the front-ECU and
the SWS communication lines are normal.
• Ignition switch: OFF
ECUS TO BE CHECKED
• COLUMN ECU
• FRONT ECU
OK: "OK" is displayed for all the items
Q: Is the check result normal?
"OK" is displayed for all the items :
Go to Step 2.
"NG" is displayed on the "COLUMN ECU" menu. :
Refer to Inspection Procedure A-2
"Communication with the column switch
(column-ECU) is not possible
."
"NG" is displayed on the "FRONT ECU" menu. :
Refer to Inspection Procedure A-4
"Communication with the front-ECU is not
possible
."
Step 2. Retest the system.
Check that the headlamps illuminate normally.
Q: Is the check result normal?
YES :
The trouble can be an intermittent
malfunction (Refer to GROUP 00
− How to
Cope with Intermittent Malfunction
NO :
Replace the column switch.
SYMPTOM PROCEDURES
SMART WIRING SYSTEM (SWS) USING SWS MONITOR
54C-174
INSPECTION PROCEDURE H-2: The tail lamps do not illuminate normally.
CAUTION
Whenever the ECU is replaced, ensure that the
input and output signal circuits are normal.
COMMENTS ON TROUBLE SYMPTOM
If all the tail lamps do not illuminate, the tail lamp
switch input circuit or the front-ECU may be defec-
tive.
POSSIBLE CAUSES
• Malfunction of the column switch
• Malfunction of the front-ECU
• Damaged harness wires and connectors
Wire colour code
B : Black LG : Light green G : Green L : Blue
W : White Y : Yellow SB : Sky blue BR : Brown
O : Orange GR : Gray R : Red P : Pink V : Violet
BATTERY
FRONT-ECU
TAIL LAMP
RELAY
RELAY
BOX
INPUT SIGNAL
· HEADLAMP AUTOMATIC
SHUTDOWN
· TAIL LAMP SWITCH
<LHD>
· HEADLAMP
ASSEMBLY (LH)
· REAR COMBINATION
LAMP (LH)
· COMBINATION METER
· LICENCE PLATE LAMP
<RHD>
· HEADLAMP
ASSEMBLY (LH)
· REAR COMBINATION
LAMP (LH)
· LICENCE PLATE LAMP
<LHD>
· HEADLAMP
ASSEMBLY (RH)
· REAR COMBINATION
LAMP (RH)
<RHD>
· HEADLAMP
ASSEMBLY (RH)
· REAR COMBINATION
LAMP (RH)
· COMBINATION METER
Taillamp Relay Circuit
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