Mitsubishi Lancer Evolution IX. Manual — part 119
SYMPTOM PROCEDURES
SMART WIRING SYSTEM (SWS) NOT USING SWS MONITOR
54B-39
POSSIBLE CAUSES
• Malfunction of the ETACS-ECU
• Damaged harness wires and connectors
DIAGNOSTIC PROCEDURE
Step 1. Check that the M.U.T.-II/III communicates
with the other systems.
Use the M.U.T.-II/III to confirm that it communicates
with the engine-ECU.
Q: Is the check result normal?
YES :
Go to Step 2.
NO :
Diagnose the engine control system by
referring to
Step 2. Check that the M.U.T.-II/III can
communicate with the system.
When the ignition switch is turned ON, check if the
M.U.T.-II/III can communicate with the system.
Q: Is the check result normal?
YES :
Refer to inspection procedure A-2 "Check
the battery power supply circuit to the
ETACS-ECU
NO :
Go to Step 3.
Step 3. Connector check: C-228 ETACS-ECU
connector
Q: Is the check result normal?
YES :
Go to Step 4.
NO :
Repair the defective connector.
Step 4. Resistance measurement at the C-228
ETACS-ECU connector
(1) Disconnect the connector, and measure at the
junction block side.
(2) Resistance between C-228 ETACS-ECU
connector terminal No.56 and body earth
OK: 2
Ω or less
Q: Is the check result normal?
YES :
Go to Step 6.
NO :
Go to Step 5.
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
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
AC310506AB
Connector C-228
(Harness side)
68
74
63
66
72
73
67
6564
61
70
71
62
69
60
57
58
59
5655
52
54 53
51
SYMPTOM PROCEDURES
SMART WIRING SYSTEM (SWS) NOT USING SWS MONITOR
54B-40
Step 5. Check the wiring harness between C-228
ETACS-ECU connector terminal No.56 and body
earth.
NOTE:
Prior to the wiring harness inspection, check joint
connector C-06, and repair if necessary.
• Check the earth wires for open circuit.
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 :
Repair the wiring harness.
Step 6. Connector check: C-14 diagnosis
connector
Q: Is the check result normal?
YES :
Go to Step 7.
NO :
Repair the defective connector.
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
AC310452
Connector: C-06 <LHD>
AB
C-06 (GR)
AC310456
Connector: C-06 <RHD>
AB
C-06 (GR)
AC310446
Connector: C-14 <LHD>
AB
Front side
C-14 (B)
AC310456
Connector: C-14 <RHD>
AC
Front side
C-14 (B)
SYMPTOM PROCEDURES
SMART WIRING SYSTEM (SWS) NOT USING SWS MONITOR
54B-41
Step 7. Check the wiring harness from C-228
ETACS-ECU connector terminal Nos.51 and 67 to
C-14 diagnosis connector terminal Nos.9 and 1.
NOTE: Prior to the wiring harness inspection, check
joint connector C-23 <LH driver vehicles> or C-21
<RH drive vehicles>, and repair if necessary.
• Check the communication lines for open circuit.
Q: Is the check result normal?
YES :
Go to Step 8.
NO :
Repair the wiring harness.
Step 8. Retest the system.
Check whether the communication with the
M.U.T.-II/III is possible.
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.
AC310447
Connectors: C-14, C-23 <LHD>
AB
2
1
3
13
12
14
21
10
5
4
6
16
15
17
7 8 9
19
18
20
11
22
C-14 (B)
C-23 (B)
C-23
Front side
C-14
AC310456
Connector: C-14 <RHD>
AC
Front side
C-14 (B)
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
AC310454
AB
Connector: C-21 <RHD>
SYMPTOM PROCEDURES
SMART WIRING SYSTEM (SWS) NOT USING SWS MONITOR
54B-42
INSPECTION PROCEDURE A-2: When the ignition switch is at the LOCK (OFF) position, the functions
do not work normally. Check the battery power supply circuit to the ETACS-ECU.
CAUTION
Whenever the ECU is replaced, ensure that the
power supply circuit and the earthing circuit are
normal.
COMMENTS ON TROUBLE SYMPTOM
If this circuit is defective and the ignition switch is at
the LOCK (OFF) position, the ETACS-ECU does not
work. In this case, the functions below will be sus-
pended.
• Lamp reminder function
• Keyless entry system
• Headlamp automatic shutdown function
However, when the ignition switch is at the ON posi-
tion, the functions below will work.
• Reading diagnosis code and checking input sig-
nal by M.U.T.-II/III.
• Central door locking
• Headlamp and tail lamp
• Hazard warning lamp
• Room lamps
POSSIBLE CAUSES
• Malfunction of the ETACS-ECU
• Damaged harness wires and connectors
NOTE
: LHD
: RHD
J/B SIDE
ETACS-ECU
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
RELAY
BOX
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